Patent Grant
11045199
The present disclosure relates to surgical devices. More specifically, the present disclosure relates to handheld electromechanical surgical systems for performing surgical procedures.
One type of surgical device is a circular clamping, cutting and stapling device. Such a device may be employed in a surgical procedure to reattach rectum portions that were previously transected, or similar procedures. Conventional circular clamping, cutting and stapling instruments include a pistol or linear grip-styled structure having an elongated shaft extending therefrom and a staple cartridge supported on the distal end of the elongated shaft. In this instance, a physician may insert an anvil assembly of the circular stapling instrument into a rectum of a patient and maneuver the anvil assembly up the colonic tract of the patient toward the transected rectum portions. The physician may also insert the remainder of the circular stapling instrument (including the cartridge assembly) through an incision and toward the transected rectum portions. The anvil and cartridge assemblies are approximated toward one another and staples are ejected from the cartridge assembly toward the anvil assembly to form the staples in tissue to affect an end-to-end anastomosis, and an annular knife is fired to core a portion of the clamped tissue portions. After the end-to-end anastomosis has been effected, the circular stapling apparatus is removed from the surgical site.
A number of surgical device manufacturers have developed product lines with proprietary powered drive systems for operating and/or manipulating the surgical device. In many instances the surgical devices include a powered handle assembly, which is reusable, and a disposable staple cartridge assembly, end effector or the like that is selectively connected to the powered handle assembly prior to use and then disconnected from the staple cartridge assembly or end effector following use in order to be disposed of or in some instances sterilized for re-use.
The use of powered electro and endomechanical surgical staplers, including intelligent battery power, has grown tremendously over the past few decades. Advanced technology and informatics within these intelligent battery-powered stapling devices provide the ability to gather clinical data and drive design improvements to ultimately improve patient outcomes. Accordingly, a need exists for improved powered electro and endomechanical surgical staplers that are capable of evaluating conditions that affect staple formation with the intention of building a more intelligent stapling algorithm.
A handheld electromechanical surgical system provided in accordance with aspects of the present disclosure is configured for selective connection with a surgical reload in order to actuate the surgical reload to perform at least one function, the surgical reload including an annular staple pusher for firing an annular array of staples thereof, and a circular knife carrier for translating an annular knife independently of the staple pusher.
The surgical system provided in accordance with the present disclosure includes a handheld electromechanical surgical device including a device housing; and at least one rotatable drive shaft supported in and projecting from the device housing.
The surgical system provided in accordance with the present disclosure includes an adapter assembly selectively connectable between the housing of the surgical device and the surgical reload. The adapter assembly includes an adapter housing configured and adapted for connection with the surgical device and to be in operative communication with each rotatable drive shaft of the surgical device; an outer tube having a proximal end supported by the adapter housing and a distal end configured and adapted for connection with the surgical reload, wherein the distal end of the outer tube is in operative communication with each of the annular staple pusher and the circular knife carrier of the surgical reload; a trocar assembly supported within the outer tube, the trocar assembly including a trocar member threadably supported on a distal end of a trocar drive screw; and a first force/rotation transmitting/converting assembly for interconnecting a respective one drive shaft of the surgical device and the trocar drive screw of the trocar assembly.
The first force/rotation transmitting/converting assembly includes a first proximal rotation receiving member that is connectable to a respective rotatable drive shaft of the surgical device; and a first distal force transmitting member that is connected to the trocar drive screw of the trocar assembly, the first distal force transmitting member being non-rotatably connected to the first proximal rotation receiving member;
The adapter assembly includes at least a second force/rotation transmitting/converting assembly for interconnecting a respective one drive shaft of the surgical device and a respective one of the annular staple pusher and the circular knife carrier of the surgical reload. The second force/rotation transmitting/converting assembly includes a second proximal rotation receiving member that is connectable to a respective rotatable drive shaft of the surgical device; and a second distal force transmitting member that is connectable to the respective one of the annular staple pusher and the circular knife carrier of the surgical reload, the second distal force transmitting member being connected to the second proximal rotation receiving member in such a manner whereby rotation of the second proximal rotation receiving member is converted to axial translation of the second distal force transmitting member, and in turn, axial translation of the respective one of the annular staple pusher and the circular knife carrier of the surgical reload.
The trocar member of the trocar assembly may be keyed against rotation relative to the outer tube as the trocar drive screw is rotated.
The first force/rotation transmitting/converting assembly may further include a rotatable proximal drive shaft non-rotatably connected to the first proximal rotation receiving member; and a rotatable distal drive shaft non-rotatably interconnecting the rotatable proximal drive shaft and the first distal force transmitting member.
The rotatable distal drive shaft may be pivotably connected to each of the rotatable proximal drive shaft and the first distal force transmitting member.
Rotation of the rotatable drive shaft of the surgical device, associated with the first force/rotation transmitting/converting assembly, may result in axial translation of the trocar member of the trocar assembly.
The surgical system may further include an anvil assembly having an annular head assembly pivotably supported on a distal end of an anvil rod assembly, wherein the anvil rod assembly is selectively connectable to a tip of the trocar member.
When the anvil assembly is connected to the trocar member, rotation of the rotatable drive shaft of the surgical device, associated with the first force/rotation transmitting/converting assembly, may result in an axial translation of the annular head assembly relative to the surgical reload.
The annular head assembly may be axially translatable between a fully extended position and a fully retracted position, relative to the surgical reload, and any position therebetween.
The at least a second force/rotation transmitting/converting assembly may include a second force/rotation transmitting/converting assembly, and a third force/rotation transmitting/converting assembly. The second force/rotation transmitting/converting assembly may be operatively associated with the annular staple pusher of the surgical reload such that actuation of the second force/rotation transmitting/converting assembly results in distal actuation of the annular staple pusher. The third force/rotation transmitting/converting assembly may be operatively associated with the circular knife carrier of the surgical reload such that actuation of the third force/rotation transmitting/converting assembly results in distal actuation of the circular knife carrier.
The second force/rotation transmitting/converting assembly may include a gear train actuatable by the second proximal rotation receiving member; a lead screw operatively connected to the gear train, wherein actuation of the gear train results in rotation of the lead screw; a driver threadably connected to the lead screw, wherein rotation of the lead screw results in axial translation of the driver; a flexible band assembly secured to the driver, wherein the flexible band assembly includes a pair of spaced apart flexible bands; and a support base secured to a distal end of the pair of flexible bands.
The support base of the second force/rotation transmitting/converting assembly may be operatively associated with the annular staple pusher of the surgical reload such that actuation of the respective rotatable drive shaft of the surgical device results in distal actuation of the annular staple pusher of the surgical reload.
The third force/rotation transmitting/converting assembly may include a gear train actuatable by a third proximal rotation receiving member; a lead screw operatively connected to the gear train of the third force/rotation transmitting/converting assembly, wherein actuation of the gear train of the third force/rotation transmitting/converting assembly results in rotation of the lead screw of the third force/rotation transmitting/converting assembly; a driver threadably connected to the lead screw of the third force/rotation transmitting/converting assembly, wherein rotation of the lead screw of the third force/rotation transmitting/converting assembly results in axial translation of the driver of the third force/rotation transmitting/converting assembly; a flexible band assembly secured to the driver of the third force/rotation transmitting/converting assembly, wherein the flexible band assembly of the third force/rotation transmitting/converting assembly includes a pair of spaced apart flexible bands; and a support base secured to a distal end of the pair of flexible bands of the third force/rotation transmitting/converting assembly.
The support base of the third force/rotation transmitting/converting assembly may be operatively associated with the circular knife carrier of the surgical reload such that actuation of the respective rotatable drive shaft of the surgical device results in distal actuation of the circular knife carrier of the surgical reload.
The pair of flexible bands of the third force/rotation transmitting/converting assembly may be disposed inward of the pair of flexible bands of the second force/rotation transmitting/converting assembly.
The gear train of the second force/rotation transmitting/converting assembly may be disposed proximally of the gear train of the third force/rotation transmitting/converting assembly.
The first force/rotation transmitting/converting assembly may extend through the gear train of the second force/rotation transmitting/converting assembly and through the gear train of the third force/rotation transmitting/converting assembly.
The gear train of each of the second and third force/rotation transmitting/converting assemblies may be a planetary gear system.
The adapter assembly may further include a strain gauge assembly supported within the outer tube, wherein the strain gauge assembly is operatively associated with the trocar member of the trocar assembly.
The strain gauge assembly may sense axial translation of the trocar member.
The handheld electromechanical surgical device may include a battery, a circuit board powered by the battery, and an electrical display connected to each of the battery and the circuit board. The strain gauge assembly may be connected to the circuit board when the adapter assembly is connected to the housing of the handheld electromechanical surgical device.
The display of the handheld electromechanical surgical device may display forces exerted on the trocar member as measured by the strain gauge assembly.
The display of the handheld electromechanical surgical device may display an axial position of the trocar member relative to the surgical reload.
The display of the handheld electromechanical surgical device may display a gap distance between the annular head assembly and the surgical reload.
The display of the handheld electromechanical surgical device may display a firing of an annular array of staples of the surgical reload as the annular staple pusher is axially advanced.
The display of the handheld electromechanical surgical device may display an actuation of a knife of the surgical reload as the circular knife carrier is axially advanced.
According to a further aspect of the present disclosure, an adapter assembly for interconnecting a handheld surgical device of an electromechanical surgical system and a surgical reload is provided. The adapter assembly includes an adapter housing configured and adapted for connection with the handheld surgical device and to be in operative communication with each rotatable drive shaft of the surgical device; an outer tube having a proximal end supported by the adapter housing and a distal end configured and adapted for connection with the surgical reload, wherein the distal end of the outer tube is in operative communication with each of an annular staple pusher and a circular knife carrier of the surgical reload; a trocar assembly supported within the outer tube, the trocar assembly including a trocar member threadably supported on a distal end of a trocar drive screw; and a first force/rotation transmitting/converting assembly for interconnecting a respective one drive shaft of the surgical device and the trocar drive screw of the trocar assembly.
The first force/rotation transmitting/converting assembly includes a first proximal rotation receiving member that is connectable to a respective rotatable drive shaft of the surgical device; and a first distal force transmitting member that is connected to the trocar drive screw of the trocar assembly, the first distal force transmitting member being non-rotatably connected to the first proximal rotation receiving member;
At least a second force/rotation transmitting/converting assembly is provided for interconnecting a respective one drive shaft of the surgical device and a respective one of the annular staple pusher and the circular knife carrier of the surgical reload. The second force/rotation transmitting/converting assembly includes a second proximal rotation receiving member that is connectable to a respective rotatable drive shaft of the surgical device; and a second distal force transmitting member that is connectable to the respective one of the annular staple pusher and the circular knife carrier of the surgical reload, the second distal force transmitting member being connected to the second proximal rotation receiving member in such a manner whereby rotation of the second proximal rotation receiving member is converted to axial translation of the second distal force transmitting member, and in turn, axial translation of the respective one of the annular staple pusher and the circular knife carrier of the surgical reload.
The trocar member of the trocar assembly may be keyed against rotation relative to the outer tube as the trocar drive screw is rotated.
The first force/rotation transmitting/converting assembly may further include a rotatable proximal drive shaft non-rotatably connected to the first proximal rotation receiving member; and a rotatable distal drive shaft non-rotatably interconnecting the rotatable proximal drive shaft and the first distal force transmitting member.
The rotatable distal drive shaft may be pivotably connected to each of the rotatable proximal drive shaft and the first distal force transmitting member.
Rotation of the rotatable drive shaft of the surgical device, associated with the first force/rotation transmitting/converting assembly, may result in axial translation of the trocar member of the trocar assembly.
The adapter assembly may further include an anvil assembly having an annular head assembly pivotably supported on a distal end of an anvil rod assembly, wherein the anvil rod assembly is selectively connectable to a tip of the trocar member.
When the anvil assembly is connected to the trocar member, rotation of the rotatable drive shaft of the surgical device, associated with the first force/rotation transmitting/converting assembly, may result in an axial translation of the annular head assembly relative to the surgical reload.
The annular head assembly may be axially translatable between a fully extended position and a fully retracted position, relative to an attached surgical reload, and any position therebetween.
The at least a second force/rotation transmitting/converting assembly may include a second force/rotation transmitting/converting assembly, and a third force/rotation transmitting/converting assembly. The second force/rotation transmitting/converting assembly may be operatively associated with the annular staple pusher of the surgical reload such that actuation of the second force/rotation transmitting/converting assembly results in distal actuation of the annular staple pusher. The third force/rotation transmitting/converting assembly may be operatively associated with the circular knife carrier of the surgical reload such that actuation of the third force/rotation transmitting/converting assembly results in distal actuation of the circular knife carrier.
The second force/rotation transmitting/converting assembly may include a gear train actuatable by the second proximal rotation receiving member; a lead screw operatively connected to the gear train, wherein actuation of the gear train results in rotation of the lead screw; a driver threadably connected to the lead screw, wherein rotation of the lead screw results in axial translation of the driver; a flexible band assembly secured to the driver, wherein the flexible band assembly includes a pair of spaced apart flexible bands; and a support base secured to a distal end of the pair of flexible bands.
The support base of the second force/rotation transmitting/converting assembly may be operatively associated with the annular staple pusher of the surgical reload such that actuation of the respective rotatable drive shaft of the surgical device results in distal actuation of the annular staple pusher of the surgical reload.
The third force/rotation transmitting/converting assembly may include a gear train actuatable by a third proximal rotation receiving member; a lead screw operatively connected to the gear train of the third force/rotation transmitting/converting assembly, wherein actuation of the gear train of the third force/rotation transmitting/converting assembly results in rotation of the lead screw of the third force/rotation transmitting/converting assembly; a driver threadably connected to the lead screw of the third force/rotation transmitting/converting assembly, wherein rotation of the lead screw of the third force/rotation transmitting/converting assembly results in axial translation of the driver of the third force/rotation transmitting/converting assembly; a flexible band assembly secured to the driver of the third force/rotation transmitting/converting assembly, wherein the flexible band assembly of the third force/rotation transmitting/converting assembly includes a pair of spaced apart flexible bands; and a support base secured to a distal end of the pair of flexible bands of the third force/rotation transmitting/converting assembly.
The support base of the third force/rotation transmitting/converting assembly may be operatively associated with the circular knife carrier of the surgical reload such that actuation of the respective rotatable drive shaft of the surgical device results in distal actuation of the circular knife carrier of the surgical reload.
The pair of flexible bands of the third force/rotation transmitting/converting assembly may be disposed inward of the pair of flexible bands of the second force/rotation transmitting/converting assembly.
The gear train of the second force/rotation transmitting/converting assembly may be disposed proximally of the gear train of the third force/rotation transmitting/converting assembly.
The first force/rotation transmitting/converting assembly may extend through the gear train of the second force/rotation transmitting/converting assembly and through the gear train of the third force/rotation transmitting/converting assembly.
The gear train of each of the second and third force/rotation transmitting/converting assemblies may be a planetary gear system.
The adapter assembly may further include a strain gauge assembly supported within the outer tube, wherein the strain gauge assembly is operatively associated with the trocar member of the trocar assembly.
The strain gauge assembly may sense axial translation of the trocar member.
The strain gauge assembly may be connected to a circuit board of the surgical device when the adapter assembly is connected to the surgical device.
The strain gauge assembly may be configured to measure forces exerted on the trocar, and wherein the forces are displayed on a display of the surgical device.
An axial position of the trocar member relative to the surgical reload may be displayed on a display of the surgical device.
A gap distance between the annular head assembly of the anvil assembly and the surgical reload may be displayed on a display of the surgical device.
A firing of an annular array of staples of the surgical reload as the annular staple pusher is axially advanced may be displayed on a display of the surgical device.
An actuation of a knife of the surgical reload as the circular knife carrier is axially advanced may be displayed on a display of the surgical device.
According to one embodiment of the present disclosure, a surgical device includes: an adapter assembly having a first storage device; an end effector configured to couple to a distal portion of the adapter assembly, the end effector including a second storage device; and a handle assembly configured to couple to a proximal portion of the adapter assembly. The handle assembly includes: a power source; a motor coupled to the power source, the motor configured to actuate at least one of the adapter assembly or the end effector; and a controller configured to communicate with the first and second storage devices.
According to one aspect of the above embodiment, the controller is operatively coupled to the motor and configured to calibrate the motor while at least one of the adapter assembly or the end effector is actuated by the motor.
According to another aspect of the above embodiment, the controller is configured to read and write data onto the first and second storage devices. The data may include usage counts.
According to a further aspect of the above embodiment, the controller is configured to write a recovery code onto the second storage device.
According to one aspect of the above embodiment, the handle assembly includes a memory accessible by the controller. The controller may be configured to write the recovery code onto the memory.
According to another aspect of the above embodiment, at least one of the adapter assembly or the handle assembly is replaceable during a surgical procedure and at least one of the adapter assembly or the handle assembly is configured to resume the surgical procedure based on the recovery code.
According to another embodiment of the present disclosure, a surgical device includes: a handle assembly having a power source; a motor coupled to the power source; and a controller configured to control the motor. The surgical device also includes an adapter assembly configured to selectively couple to the handle assembly; a reload configured to selectively couple to a distal portion of the adapter assembly, the reload including a plurality of fasteners; and an anvil assembly selectively couplable to the distal portion of the adapter assembly. The anvil assembly being movable relative to the reload, wherein the controller is configured to control the motor to move the anvil thereby compressing tissue between the anvil and the reload at first speed for a first segment and at a second speed for a second segment, the second speed being slower than the first speed.
According to one aspect of the above embodiment, the adapter assembly includes a strain gauge configured to measure strain.
According to another aspect of the above embodiment, the controller is further configured to determine whether the anvil assembly is decoupled from the adapter assembly based on the measured strain during the second segment.
According to a further aspect of the above embodiment, the controller is further configured to move the anvil at a variable speed during a third segment.
According to yet another aspect of the above embodiment, the controller is further configured to determine a predicted clamping force based on a plurality of measured strain values.
According to one aspect of the above embodiment, the controller is further configured to calculate the predicted clamping force from the plurality of measured strain values using a second-order predictive filter.
According to another aspect of the above embodiment, the controller is further configured to adjust the variable speed based on a comparison of the predicted clamping force and a target clamping force.
According to a further aspect of the above embodiment, the controller is further configured to calculate a set speed during the third segment based on a difference between the target clamping force and the predicted clamping force.
According to a further embodiment of the present disclosure, a surgical device includes: a handle assembly having: a power source; at least one motor coupled to the power source; and a controller configured to control the motor. The surgical device also includes: an adapter assembly configured to selectively couple to the handle assembly, the adapter assembly including a strain gauge configured to measure strain; a reload configured to selectively couple to a distal portion of the adapter assembly. The reload includes: a plurality of fasteners; an annular staple pusher for ejecting the plurality of staples; and an anvil assembly selectively couplable to the distal portion of the adapter assembly, the anvil assembly being movable relative to the reload; wherein the controller is configured to control the motor to move the annular staple pusher based on the measured strain.
According to one aspect of the above embodiment, the controller is configured to compare the measured strain to a minimum stapling force and a maximum stapling force during movement of the annular staple pusher.
According to another aspect of the above embodiment, the controller is configured to determine presence of the plurality of fasteners based on the measured strain being below the minimum stapling force.
According to a further aspect of the above embodiment, the controller is configured to stop the motor in response to the measured strain exceeding the maximum stapling force.
According to yet another aspect of the above embodiment, the reload further includes a circular knife independently movable relative to the staple pusher.
According to one aspect of the above embodiment, the controller is configured to control the motor to move the circular knife based on the measured strain.
According to another aspect of the above embodiment, the controller is configured to compare the measured strain to a target cutting force and a maximum cutting force during movement of the circular knife.
According to a further aspect of the above embodiment, the controller is configured to determine whether tissue was cut based on the measured strain being equal to or exceeding the target cutting force.
According to one embodiment of the above embodiment, a method of using a surgical device includes: coupling an adapter assembly to a handle assembly, the adapter assembly including a storage device and the handle assembly including a motor, a memory, and a controller; executing an operational sequence by the controller to control the motor to actuate at least one component of the adapter assembly; and registering an error state associated with the operational sequence. The method also includes writing a recovery code in the storage device and the memory; replacing at least one of the adapter assembly or the handle assembly based on the error state; and resuming the operational sequence based on the recovery code read from at least one of the storage device or the memory.
According to one aspect of the above embodiment, the method further includes coupling a reload including a plurality of fasteners to a distal portion of the adapter assembly.
According to another aspect of the above embodiment, the method further includes coupling an anvil assembly to the distal portion of the adapter assembly.
According to a further aspect of the above embodiment, the method further includes displaying a recovery procedure for resuming the operational sequence on a display of the handle assembly.
According to another embodiment of the present disclosure, a method of using a surgical device includes: coupling an adapter assembly to a handle assembly; performing a surgical procedure using the handle assembly and adapter assembly; replacing at least one of the adapter assembly or the handle assembly upon encountering an error in at least one of the adapter assembly or the handle assembly; and resuming the surgical procedure.
Embodiments of the present disclosure are described herein with reference to the accompanying drawings, wherein:
Embodiments of the presently disclosed surgical devices, and adapter assemblies for surgical devices and/or handle assemblies are described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views. As used herein the term “distal” refers to that portion of the adapter assembly or surgical device, or component thereof, farther from the user, while the term “proximal” refers to that portion of the adapter assembly or surgical device, or component thereof, closer to the user.
A surgical device, in accordance with an embodiment of the present disclosure, is a handheld surgical device in the form of a powered electromechanical handle assembly configured for selective attachment thereto of a plurality of different reloads, via a plurality of respective adapter assemblies, that are each configured for actuation and manipulation by the powered electromechanical handle assembly.
The surgical device includes a handle assembly 100 which is configured for selective connection with an adapter assembly 200, and, in turn, adapter assembly 200 is configured for selective connection with a selected reload 400 (of a plurality of reloads), which are configured to produce a surgical effect on tissue of a patient.
As illustrated in
Distal and proximal half-sections 10a, 10b of shell housing 10 are divided along a plane that traverses a longitudinal axis “X” of adapter assembly 200.
Each of distal and proximal half-sections 10a, 10b of shell housing 10 includes a respective upper shell portion 12a, 12b, and a respective lower shell portion 14a, 14b. Lower shell portions 14a, 14b define a snap closure feature 18 for selectively securing lower shell portions 14a, 14b to one another and for maintaining shell housing 10 in a closed condition. Shell housing 10 includes right-side and left-side snap closure features 18a for further securing distal and proximal half-sections 10a, 10b of shell housing 10 to one another.
Distal half-section 10a of shell housing 10 defines a connecting portion 20 configured to accept a corresponding drive coupling assembly 210 of Adapter assembly 200. Specifically, distal half-section 10a of shell housing 10 has a recess 20 that receives a portion of drive coupling assembly 210 of Adapter assembly 200 when Adapter assembly 200 is mated to handle assembly 100.
Connecting portion 20 of distal half-section 10a defines a pair of axially extending guide rails 20a, 20b projecting radially inward from inner side surfaces thereof. Guide rails 20a, 20b assist in rotationally orienting Adapter assembly 200 relative to handle assembly 100 when Adapter assembly 200 is mated to handle assembly 100.
Connecting portion 20 of distal half-section 10a defines three apertures 22a, 22b, 22c formed in a distally facing surface thereof and which are arranged in a common plane or line with one another. Connecting portion 20 of distal half-section 10a also defines an elongate slot 24 (to contain connector 66, see
Connecting portion 20 of distal half-section 10a further defines a female connecting feature 26 (see
Distal half-section 10a of shell housing 10 supports a distal facing toggle control button 30. Toggle control button 30 is capable of being actuated in a left, right, up and down direction upon application of a corresponding force thereto or a depressive force thereto.
Distal half-section 10a of shell housing 10 supports a right-side pair of control buttons 32a, 32b (see
Proximal half-section 10b of shell housing 10 supports a right-side fire button 36a (see
Distal half-section 10a and proximal half-section 10b of shell housing 10 are fabricated from a polycarbonate, and are clear or transparent or may be overmolded.
With reference to
In use, when body portion 52 of insertion guide 50 is seated on distal facing edge 10d of proximal half-section 10b, the central opening of insertion guide 50 provides access to shell cavity 10c of shell housing 10 for insertion of a non-sterile power handle 101 of handle assembly 100 into proximal half-section 10b of sterile shell housing 10.
With reference to
Plate assembly 60 further includes an electrical connector 66 supported on plate 62. Electrical connector 66 extends from opposed sides of plate 62. Each coupling shaft 64a, 64b, 64c extends through respective aperture 22a, 22b, 22c of connecting portion 20 of distal half-section 10a of shell housing 10 when sterile barrier plate assembly 60 is disposed within shell cavity 10c of shell housing 10. Electrical connector 66 includes a chip and defines a plurality of contact paths each including an electrical conduit for extending an electrical connection across plate 62.
When plate assembly 60 is disposed within shell cavity 10c of shell housing 10, distal ends of coupling shaft 64a, 64b, 64c and a distal end of pass-through connector 66 are disposed or situated within connecting portion 20 of distal half-section 10a of shell housing 10, and electrically and/or mechanically engage respective corresponding features of Adapter assembly 200, as will be described in greater detail below.
In operation, with a new and/or sterile shell housing 10 in an open configuration (e.g., distal half-section 10a separated from proximal half-section 10b, about hinge 16), and with insertion guide 50 in place against the distal edge 10d of proximal half-section 10b of shell housing 10, power handle 101 is inserted through the central opening of insertion guide 50 and into shell cavity 10c of shell housing 10. With power handle 101 inserted into shell cavity 10c of shell housing 10, insertion guide 50 is removed from proximal half-section 10b and distal half-section 10a is pivoted, about hinge 16, to a closed configuration for shell housing 10. In the closed configuration, snap closure feature 18 of lower shell portion 14a of distal half-section 10a engages snap closure feature 18 of lower shell portion 14b of proximal half-section 10b. Also, right-side and left-side snap closure features 18a engage to further maintain shell housing 10 in the closed configuration.
In operation, following a surgical procedure, snap closure feature 18 of lower shell portion 14a of distal half-section 10a is disengaged from snap closure feature 18 of lower shell portion 14b of proximal half-section 10b, and right-side and left-side snap closure features 18a are disengaged, such that distal half-section 10a may be pivoted, about hinge 16, away from proximal half-section 10b to open shell housing 10. With shell housing 10 open, power handle 101 is removed from shell cavity 10c of shell housing 10 (specifically from proximal half-section 10b of shell housing 10), and shell housing 10 is discarded.
Power handle 101 is then disinfected and cleaned. Power handle 101 is not to be submerged and is not to be sterilized.
Referring to
Power-pack core assembly 106 is configured to control the various operations of handle assembly 100, as will be set forth in additional detail below.
Distal half-section 110a of inner handle housing 110 defines a distal opening 111a therein which is configured and adapted to support a control plate 160 of power-pack core assembly 106. Control plate 160 of power handle 101 abuts against a rear surface of plate 62 of sterile barrier plate assembly 60 of shell housing 10 when power handle 101 is disposed within shell housing 10.
With reference to
Distal half-section 110a of inner handle housing 110 also supports a right-side pair of control interfaces 132a, 132b, and a left-side pair of control interfaces 134a, 134b. In use, when power handle 101 is disposed within shell housing 10, actuation of one of the right-side pair of control buttons 32a, 32b or the left-side pair of control button 34a, 34b of distal half-section 10a of shell housing 10 exerts a force on a respective one of the right-side pair of control interfaces 132a, 132b or the left-side pair of control interfaces 134a, 134b of distal half-section 110a of inner handle housing 110.
In use, control button 30, right-side fire button 36a or the left-side fire button 36b, the right-side pair of control interfaces 132a, 132b, and the left-side pair of control interfaces 134a, 134b of distal half-section 110a of inner handle housing 110 will be deactived or fail to function unless shell housing 10 has been validated.
Proximal half-section 110b of inner handle housing 110 defines a right-side control aperture 136a and a left-side control aperture 136b. In use, when power handle 101 is disposed within shell housing 10, actuation of one of the right-side fire button 36a or the left-side fire button 36b of proximal half-section 10b of shell housing 10 extends the right-side fire button 36a or the left-side fire button 36b into and across the right-side control aperture 136a or the left-side control aperture 136b of the proximal half-section 110b of inner handle housing 110.
With reference to
Power-pack core assembly 106 further includes a display screen 146 supported on main controller circuit board 142b. Display screen 146 is visible through a clear or transparent window 110d (see
Power-pack core assembly 106 further includes a first motor 152, a second motor 154, and a third motor 156 each electrically connected to controller circuit board 142 and battery 144. Motors 152, 154, 156 are disposed between motor controller circuit board 142a and main controller circuit board 142b. Each motor 152, 154, 156 includes a respective motor shaft 152a, 154a, 156a extending therefrom. Each motor shaft 152a, 154a, 156a has a tri-lobe transverse cross-sectional profile for transmitting rotative forces or torque.
Each motor 152, 154, 156 is controlled by a respective motor controller. The motor controllers are disposed on motor controller circuit board 142a and are A3930/31K motor drivers from Allegro Microsystems, Inc. The A3930/31K motor drivers are designed to control a 3-phase brushless DC (BLDC) motor with N-channel external power MOSFETs, such as the motors 152, 154, 156. Each of the motor controllers is coupled to a main controller disposed on the main controller circuit board 142b. The main controller is also coupled to memory, which is also disposed on the main controller circuit board 142b. The main controller is an ARM Cortex M4 processor from Freescale Semiconductor, Inc, which includes 1024 kilobytes of internal flash memory. The main controller communicates with the motor controllers through an FPGA, which provides control logic signals (e.g., coast, brake, etc.). The control logic of the motor controllers then outputs corresponding energization signals to their respective motors 152, 154, 156 using fixed-frequency pulse width modulation (PWM).
Each motor 152, 154, 156 is supported on a motor bracket 148 such that motor shaft 152a, 154a, 156a are rotatably disposed within respective apertures of motor bracket 148. As illustrated in
Rotation of motor shafts 152a, 154a, 156a by respective motors 152, 154, 156 function to drive shafts and/or gear components of Adapter assembly 200 in order to perform the various operations of handle assembly 100. In particular, motors 152, 154, 156 of power-pack core assembly 106 are configured to drive shafts and/or gear components of adapter assembly 200 in order to selectively extend/retract a trocar member 274 of a trocar assembly 270 of adapter assembly 200; to, open/close reload 400 (when an anvil assembly 510 is connected to trocar member 274 of trocar assembly 270), to fire an annular array of staples of reload 400, and to fire an annular knife 444 of reload 400.
Motor bracket 148 also supports an electrical receptacle 149. Electrical receptacle 149 is in electrical connection with main controller circuit board 142b by a second ribbon cable 142d. Electrical receptacle 149 defines a plurality of electrical slots for receiving respective electrical contacts or blades extending from pass-through connector 66 of plate assembly 60 of shell housing 10.
In use, when adapter assembly 200 is mated to handle assembly 100, each of coupling shafts 64a, 64b, 64c of plate assembly 60 of shell housing 10 of handle assembly 100 couples with corresponding rotatable connector sleeves 218, 222, 220 of adapter assembly 200 (see
The mating of coupling shafts 64a, 64b, 64c of handle assembly 100 with connector sleeves 218, 222, 220 of adapter assembly 200 allows rotational forces to be independently transmitted via each of the three respective connector interfaces. The coupling shafts 64a, 64b, 64c of handle assembly 100 are configured to be independently rotated by respective motors 152, 154, 156.
Since each of coupling shafts 64a, 64b, 64c of handle assembly 100 has a keyed and/or substantially non-rotatable interface with respective connector sleeves 218, 222, 220 of adapter assembly 200, when adapter assembly 200 is coupled to handle assembly 100, rotational force(s) are selectively transferred from motors 152, 154, 156 of handle assembly 100 to adapter assembly 200.
The selective rotation of coupling shaft(s) 64a, 64b, 64c of handle assembly 100 allows handle assembly 100 to selectively actuate different functions of reload 400. As will be discussed in greater detail below, selective and independent rotation of first coupling shaft 64a of handle assembly 100 corresponds to the selective and independent extending/retracting of trocar member 274 of adapter assembly 200 and/or the selective and independent opening/closing of reload 400 (when anvil assembly 510 is connected to trocar member 274). Also, the selective and independent rotation of third coupling shaft 64c of handle assembly 100 corresponds to the selective and independent firing of an annular array of staples of reload 400. Additionally, the selective and independent rotation of second coupling shaft 64b of handle assembly 100 corresponds to the selective and independent firing of an annular knife 444 of reload 400.
With reference to
Power-pack core assembly 106 includes a single right-side push-button switch 178a disposed beneath right-side control aperture 136a of proximal half-section 110b of inner handle housing 110, and a single left-side push-button switch 178b disposed beneath left-side control aperture 136b of proximal half-section 110b of inner handle housing 110. Push-button switches 178a, 178b are supported on controller circuit board 142. Push-button switches 178a, 178b are disposed beneath right-side fire button 36a and left-side fire button 36b of proximal half-section 10b of shell housing 10 when power handle 101 is disposed within outer shell housing 10.
The actuation of push button switch 172c of switch assembly 170 of power handle 101, corresponding to a downward actuation of toggle control button 30, causes controller circuit board 142 to provide appropriate signals to motor 152 to activate, to retract a trocar member 274 of adapter assembly 200 and/or to close handle assembly 100 (e.g., approximate anvil assembly 510 relative to reload 400).
The actuation of push button switch 172a of switch assembly 170 of power handle 101, corresponding to an upward actuation of toggle control button 30, causes controller circuit board 142 to activate, to advance trocar member 274 of adapter assembly 200 and/or to open handle assembly 100 (e.g., separate anvil assembly 510 relative to reload 400).
The actuation of fire switch 178a or 178b of power handle 101, corresponding to an actuation of right-side or left-side control button 36a, 36b, causes controller circuit board 142 to provide appropriate signals to motors 154 and 156 to activate, as appropriate, to fire staples of reload 400, and then to advance (e.g., fire) and retract an annular knife 444 of reload 400.
The actuation of switches 174a, 174b (by right-hand thumb of user) or switches 176a, 176b (by left-hand thumb of user) of switch assembly 170, corresponding to respective actuation of right-side pair of control buttons 32a, 32b or left-side pair of control button 34a, 34b, causes controller circuit board 142 to provide appropriate signals to motor 152 to activate, to advance or retract trocar member 274 of adapter assembly 200.
With reference to
As illustrated in
Adapter assembly 200 is configured to convert a rotation of coupling shaft(s) 64a, 64b, 64c of handle assembly 100 into axial translation useful for advancing/retracting trocar member 274 of adapter assembly 200, for opening/closing handle assembly 100 (when anvil assembly 510 is connected to trocar member 274), for firing staples of reload 400, and for firing annular knife 444 of reload 400, as illustrated in
Adapter assembly 200 includes a first drive transmitting/converting assembly for interconnecting first coupling shaft 64a of handle assembly 100 and an anvil assembly 510, wherein the first drive transmitting/converting assembly converts and transmits a rotation of first coupling shaft 64a of handle assembly 100 to an axial translation of trocar member 274 of trocar assembly 270, and in turn, the anvil assembly 510, which is connected to trocar member 274, to open/close handle assembly 100.
Adapter assembly 200 includes a second drive transmitting/converting assembly for interconnecting third coupling shaft 64c of handle assembly 100 and a second axially translatable drive member of reload 400, wherein the second drive transmitting/converting assembly converts and transmits a rotation of third coupling shaft 64c of handle assembly 100 to an axial translation of an outer flexible band assembly 255 of adapter assembly 200, and in turn, a driver adapter 432 of a staple driver assembly 430 of reload 400 to fire staples from a staple cartridge 420 of reload 400 and against anvil assembly 510.
Adapter assembly 200 includes a third drive transmitting/converting assembly for interconnecting second coupling shaft 64b of handle assembly 100 and a third axially translatable drive member of reload 400, wherein the third drive transmitting/converting assembly converts and transmits a rotation of second coupling shaft 64b of handle assembly 100 to an axial translation of an inner flexible band assembly 265 of adapter assembly 200, and in turn, a knife assembly 440 of reload 400 to fire annular knife 444 against anvil assembly 510.
Turning now to
Adapter assembly 200 is configured to convert a rotation of either of first, second or third coupling shafts 64a, 64b, 64c, respectively, of handle assembly 100, into axial translations useful for operating trocar assembly 270 of adapter assembly 200, anvil assembly 510, and/or staple driver assembly 430 or knife assembly 440 of reload 400, as will be described in greater detail below.
As illustrated in
As described briefly above, drive coupling assembly 210 of adapter assembly 200 is also configured to rotatably support first, second and third connector sleeves 218, 222 and 220, respectively, arranged in a common plane or line with one another. Each of connector sleeves 218, 220, 222 is configured to mate with respective first, second and third coupling shafts 64a, 64c and 64b of handle assembly 100, as described above. Each of connector sleeves 218, 220, 222 is further configured to mate with a proximal end of respective first, second and third proximal drive shafts 212, 214, 216 of adapter assembly 200.
Drive coupling assembly 210 of adapter assembly 200 also includes, as illustrated in
In particular, first, second and third biasing members 224, 226 and 228 function to bias respective connector sleeves 218, 222 and 220 in a proximal direction. In this manner, during connection of handle assembly 100 to adapter assembly 200, if first, second and or third connector sleeves 218, 222 and/or 220 is/are misaligned with coupling shafts 64a, 64b and 64c of handle assembly 100, first, second and/or third biasing member(s) 224, 226 and/or 228 are compressed. Thus, when handle assembly 100 is operated, coupling shafts 64a, 64c and 64b of handle assembly 100 will rotate and first, second and/or third biasing member(s) 224, 228 and/or 226 will cause respective first, second and/or third connector sleeve(s) 218, 220 and/or 222 to slide back proximally, effectively connecting coupling shafts 64a, 64c and 64b of handle assembly 100 to first, second and/or third proximal drive shaft(s) 212, 214 and 216 of drive coupling assembly 210.
As briefly mentioned above, adapter assembly 200 includes a first, a second and a third force/rotation transmitting/converting assembly 240, 250, 260, respectively, disposed within inner housing member 204 and outer tube 206. Each force/rotation transmitting/converting assembly 240, 250, 260 is configured and adapted to transmit or convert a rotation of a first, second and third coupling shafts 64a, 64c and 64b of handle assembly 100 into axial translations to effectuate operation of trocar assembly 270 of adapter assembly 200, and of staple driver assembly 430 or knife assembly 440 of reload 400.
As shown in
First rotatable proximal drive shaft 212 includes a non-circular or shaped proximal end portion configured for connection with first connector 218 which is connected to respective first coupling shaft 64a of handle assembly 100. First rotatable proximal drive shaft 212 includes a non-circular recess formed therein which is configured to key with a respective complimentarily shaped proximal end portion 281a of second rotatable proximal drive shaft 281. Second rotatable proximal drive shaft 281 includes a distal end portion 281b defining an oversized recess therein which is configured to receive a proximal end portion 282a of first rotatable distal drive shaft 282. Proximal end portion 282a of first rotatable distal drive shaft 282 is pivotally secured within the recess in distal end 281b of second rotatable proximal drive shaft 281 by a pin 283a received through the oversized recess in distal end portion 281b of second rotatable proximal drive shaft 281.
First rotatable distal drive shaft 282 includes a proximal end portion 282a, and a distal end portion 282b which is pivotally secured within a recess of coupling member 286. Distal end portion 282b of first rotatable distal drive shaft 282 is pivotally secured within a recess in a proximal end of coupling member 286 by a pin 283b received through the recess in the proximal end portion of coupling member 286. Proximal and distal end portions 282a, 282b of first rotatable distal drive shaft 282 define oversized openings for receiving pins 283a, 283b, respectively.
Coupling member 286 includes a proximal end 286a defining a recess 286c for receiving distal end portion 282b of first rotatable distal drive shaft 282, a distal end 286b defining a recess 286d for operably receiving a non-circular stem 276c on proximal end 276a of a drive screw 276 of trocar assembly 270.
First force/rotation transmitting/converting assembly 240 further includes a trocar assembly 270 removably supported in a distal end of outer tube 206. Trocar assembly 270 includes an outer housing 272, a trocar member 274 slidably disposed within tubular outer housing 272, and a drive screw 276 operably received within trocar member 274 for axially moving trocar member 274 relative to tubular housing 272. In particular, trocar member 274 includes a proximal end 274a having an inner threaded portion which engages a threaded distal portion 276b of drive screw 276. Trocar member 274 further includes at least one longitudinally extending flat formed in an outer surface thereof which mates with a corresponding flat formed in tubular housing 272 thereby inhibiting rotation of trocar member 274 relative to tubular housing 272 as drive screw 276 is rotated. A distal end 274b of trocar member 274 is configured to selectively engage anvil assembly 510 (
Tubular housing 272 of trocar assembly 270 is axially and rotationally fixed within outer tube 206 of adapter assembly 200. Tubular housing 272 defines a pair of radially opposed, and radially oriented openings 272a which are configured and dimensioned to cooperate with a pair of lock pins 275c of a trocar assembly release mechanism 275. With reference to
As illustrated in
In use, when release button 275a is depressed (e.g., in a radially inward direction,
In operation, as first rotatable proximal drive shaft 212 is rotated, due to a rotation of first connector sleeve 218, as a result of the rotation of first coupling shaft 64a of handle assembly 100, second rotatable distal drive shaft 281 is caused to be rotated. Rotation of second rotatable distal drive shaft 281 results in contemporaneous rotation of first rotatable distal drive shaft 282. Rotation of first rotatable distal drive shaft 282 causes contemporaneous rotation of coupling member 286, which, in turn, causes contemporaneous rotation of drive screw 276 of trocar assembly 270. As drive screw 276 is rotated within and relative to trocar member 274, engagement of the inner threaded portion of trocar member 274 with threaded distal portion 276b of drive screw 276 causes axial translation of trocar member 274 within tubular housing 272 of trocar assembly 270. Specifically, rotation of drive screw 276 in a first direction causes axial translation of trocar member 274 in a first direction (e.g., extension of trocar assembly 270 of handle assembly 100), and rotation of drive screw 276 in a second direction causes axial translation of trocar member 274 in a second direction (e.g., retraction of trocar assembly 270 of handle assembly 100).
When anvil assembly 510 is connected to trocar member 274, as will be described in detail below, the axial translation of trocar member 274 in the first direction results in an opening of reload 400, and the axial translation of trocar member 274 in the second direction results in a closing of reload 400.
Forces during an actuation or trocar member 274 or a closing of reload 400 may be measured by strain sensor 320a of strain gauge assembly 320 in order to:
In operation, strain sensor 320a of strain gauge assembly 320 of adapter assembly 200 measures and monitors the retraction of trocar member 274, as described above. During the closing of reload 400, if and when head assembly 512 of anvil assembly 510 contacts tissue, an obstruction, staple cartridge 420 or the like, a reaction force is exerted on head assembly 512 which is in a generally distal direction. This distally directed reaction force is communicated from head assembly 512 to center rod assembly 514 of anvil assembly 510, which in turn is communicated to trocar assembly 270. Trocar assembly 270 then communicates the distally directed reaction force to the pair of pins 275c of trocar assembly release mechanism 275, which in turn then communicate the reaction force to support block 292. Support block 292 then communicates the distally directed reaction force to strain sensor 320a of strain gauge assembly 320.
Strain sensor 320a of strain gauge assembly 320 is a device configured to measure strain (a dimensionless quantity) on an object that it is adhered to (e.g., support block 292), such that, as the object deforms, a metallic foil of the strain sensor 320a is also deformed, causing an electrical resistance thereof to change, which change in resistance is then used to calculate loads experienced by trocar assembly 270.
Strain sensor 320a of strain gauge assembly 320 then communicates signals to main controller circuit board 142b of power-pack core assembly 106 of handle assembly 100. Graphics are then displayed on display screen 146 of power-pack core assembly 106 of handle assembly 100 to provide the user with real-time information related to the status of the firing of handle assembly 100.
With reference to
Second rotatable proximal drive shaft 214 includes a non-circular or shaped proximal end portion configured for connection with second connector or coupler 220 which is connected to respective second coupling shaft 64c of handle assembly 100. Second rotatable proximal drive shaft 214 further includes a distal end portion 214b having a spur gear non-rotatably connected thereto.
First coupling shaft 251 of second force/rotation transmitting/converting assembly 250 includes a proximal end portion 251a having a spur gear non-rotatably connected thereto, and a distal end portion 251b having a spur gear non-rotatably connected thereto. The spur gear at the proximal end portion 251a of first coupling shaft 251 is in meshing engagement with the spur gear at the distal end portion 214b of the second rotatable proximal drive shaft 214.
Planetary gear set 252 of second force/rotation transmitting/converting assembly 250 includes a first cannulated sun gear 252a, a first set of planet gears 252b, a ring gear 252c, a second set of planet gears 252d, and a second cannulated sun gear 252e. First sun gear 252a is in meshing engagement with the spur gear at the distal end portion 251b of first coupling shaft 251. The first set of planet gears 252b are interposed between, and are in meshing engagement with, first sun gear 252a and ring gear 252c. The second set of planet gears 252d are interposed between, and are in meshing engagement with, second sun gear 252e and ring gear 252c. Ring gear 252c is non-rotatably supported in outer tube 206 of adapter assembly 200.
Planetary gear set 252 of second force/rotation transmitting/converting assembly 250 includes a washer 252f disposed within ring gear 252c, and between the first set of planet gears 252b and the second set of planet gears 252d. The first set of planet gears 252b are rotatably supported radially about washer 252f, and second sun gear 252e is non-rotatably connected to a center of washer 252f.
Staple lead screw 253 of second force/rotation transmitting/converting assembly 250 includes a proximal flange 253a and a distal threaded portion 253b extending from flange 253a. Staple lead screw 253 defines a lumen 253c therethrough. The second set of planet gears 252d are rotatably supported radially about proximal flange 253a of staple lead screw 253.
Staple driver 254 of second force/rotation transmitting/converting assembly 250 includes a central threaded lumen 254a extending therethrough and is configured and dimensioned to support distal threaded portion 253b of staple lead screw 253 therein. Staple driver 254 includes a pair of tabs 254b projecting radially from an outer surface thereof, and which are configured for connection to outer flexible band assembly 255 of adapter assembly 200, as will be described in greater detail below.
With reference now to
Outer flexible band assembly 255 further includes first and second connection extensions 255e, 255f extending proximally from support ring 255c. First and second connection extensions 255e, 255f are configured to operably connect outer flexible band assembly 255 to staple driver 254 of second force/rotation transmitting/converting assembly 250. In particular, each of first and second connection extensions 255e, 255f defines an opening configured to receive a respective tab 254b of staple driver 254. Receipt of tabs 254b of staple driver 254 within the openings of respective first and second connection extensions 255e, 255f secures outer flexible band assembly 255 to staple driver 254 of second force/rotation transmitting/converting assembly 250.
Support base 255d extends distally from flexible bands 255a, 255b and is configured to selectively contact driver adapter 432 of staple driver assembly 430 of reload 400.
Flexible bands 255a, 255b are fabricated from stainless steel 301 half hard and are configured to transmit axial pushing forces along a curved path.
Second force/rotation transmitting/converting assembly 250 and outer flexible band assembly 255 are configured to receive first rotatable proximal drive shaft 212, first rotatable distal drive shaft 282, and trocar assembly 270 of first force/rotation transmitting/converting assembly 240 therethrough. Specifically, first rotatable proximal drive shaft 212 is non-rotatably connected to second rotatable proximal drive shaft 281 which in turn is rotatably disposed within and through first cannulated sun gear 252a of first planetary gear set 252, second cannulated sun gear 252e of planetary gear set 252, staple lead screw 253, and staple driver 254.
Second force/rotation transmitting/converting assembly 250 and outer flexible band assembly 255 are also configured to receive third force/rotation transmitting/converting assembly 260 therethrough. Specifically, as described below, inner flexible band assembly 265 is slidably disposed within and through outer flexible band assembly 255.
First rotatable distal drive shaft 282 of first force/rotation transmitting/converting assembly 240 is rotatably disposed within support base 255d of outer flexible band assembly 255, while trocar member 274 of trocar assembly 270 of first force/rotation transmitting/converting assembly 240 is slidably disposed within support base 255d of outer flexible band assembly 255.
Outer flexible band assembly 255 is also configured to receive inner flexible band assembly 265 therethrough.
In operation, as second rotatable proximal drive shaft 214 is rotated due to a rotation of second connector sleeve 220, as a result of the rotation of the second coupling shaft 64c of handle assembly 100, first coupling shaft 251 is caused to be rotated, which in turn causes first cannulated sun gear 252a to rotate. Rotation of first cannulated sun gear 252a, results in contemporaneous rotation of the first set of planet gears 252b, which in turn causes washer 252f to contemporaneously rotate second cannulated sun gear 252e. Rotation of second cannulated sun gear 252e, results in contemporaneous rotation of the second set of planet gears 252d, which in turn causes contemporaneous rotation of staple lead screw 253. As staple lead screw 253 is rotated, staple driver 254 is caused to be axially translated, which in turn causes outer flexible band assembly 255 to be axially translated. As outer flexible band assembly 255 is axially translated, support base 255d presses against driver adapter 432 of staple driver assembly 430 of reload 400 to distally advance driver 434 and fire staples “S” (
With reference to
Third rotatable proximal drive shaft 216 includes a non-circular or shaped proximal end portion configured for connection with third connector or coupler 222 which is connected to respective third coupling shaft 64b of handle assembly 100. Third rotatable proximal drive shaft 216 further includes a distal end portion 216b having a spur gear non-rotatably connected thereto.
Second coupling shaft 261 of third force/rotation transmitting/converting assembly 260 includes a proximal end portion 261a having a spur gear non-rotatably connected thereto, and a distal end portion 261b having a spur gear non-rotatably connected thereto. The spur gear at the proximal end portion 261a of second coupling shaft 261 is in meshing engagement with the spur gear at the distal end portion 216b of the third rotatable proximal drive shaft 216.
Planetary gear set 262 of third force/rotation transmitting/converting assembly 260 includes a first cannulated sun gear 262a, a first set of planet gears 262b, a ring gear 262c, a second set of planet gears 262d, and a second cannulated sun gear 262e. First sun gear 262a is non-rotatably supported on a distal end portion of a hollow shaft 269. Hollow shaft 269 includes a spur gear 269a non-rotatably supported on a proximal end thereof. Spur gear 269a of hollow shaft 269 is in meshing engagement with the spur gear at the distal end portion 261b of second coupling shaft 261. The first set of planet gears 262b are interposed between, and are in meshing engagement with, first sun gear 262a and ring gear 262c. The second set of planet gears 262d are interposed between, and are in meshing engagement with, second sun gear 262e and ring gear 262c. Ring gear 262c is non-rotatably supported in outer tube 206 of adapter assembly 200.
Planetary gear set 262 of third force/rotation transmitting/converting assembly 260 includes a washer 262f disposed within ring gear 262c, and between the first set of planet gears 262b and the second set of planet gears 262d. The first set of planet gears 262b are rotatably supported radially about washer 262f, and second sun gear 262e is non-rotatably connected to a center of washer 262f.
Knife lead screw 263 of second force/rotation transmitting/converting assembly 260 includes a proximal flange 263a and a distal threaded portion 263b extending from flange 263a. Knife lead screw 263 defines a lumen 263c therethrough. The second set of planet gears 262d are rotatably supported radially about proximal flange 263a of knife lead screw 263.
Knife driver 264 of second force/rotation transmitting/converting assembly 260 includes a central threaded lumen 264a extending therethrough and is configured and dimensioned to support distal threaded portion 263b of knife lead screw 263 therein. Knife driver 264 includes a pair of tabs 264b projecting radially from an outer surface thereof, and which are configured for connection to inner flexible band assembly 265 of adapter assembly 200, as will be described in greater detail below.
With reference now to
Inner flexible band assembly 265 further includes first and second connection extensions 265e, 265f extending proximally from support ring 265c. First and second connection extensions 265e, 265f are configured to operably connect inner flexible band assembly 265 to knife driver 264 of third force/rotation transmitting/converting assembly 260. In particular, each of first and second connection extensions 265e, 265f defines an opening configured to receive a respective tab 264b of knife driver 264. Receipt of tabs 264b of knife driver 264 within the openings of respective first and second connection extensions 265e, 265f secures inner flexible band assembly 265 to knife driver 264 of third force/rotation transmitting/converting assembly 260.
Support base 265d extends distally from flexible bands 265a, 265b and is configured to connect with knife carrier 442 of knife assembly 440 of reload 400.
Flexible bands 265a, 265b are fabricated from stainless steel 301 half hard and are configured to transmit axial pushing forces along a curved path.
Third force/rotation transmitting/converting assembly 260 and inner flexible band assembly 265 are configured to receive first rotatable proximal drive shaft 212, first rotatable distal drive shaft 282, and trocar assembly 270 of first force/rotation transmitting/converting assembly 240 therethrough. Specifically, first rotatable proximal drive shaft 212 is rotatably disposed within and through hollow shaft 269, first cannulated sun gear 262a of first planetary gear set 262, second cannulated sun gear 262e of planetary gear set 262, knife lead screw 263, and knife driver 264.
First rotatable distal drive shaft 282 of first force/rotation transmitting/converting assembly 240 is also rotatably disposed within support base 265d of inner flexible band assembly 265, while trocar member 274 of trocar assembly 270 of first force/rotation transmitting/converting assembly 240 is slidably disposed within support base 265d of inner flexible band assembly 265.
In operation, as third rotatable proximal drive shaft 216 is rotated due to a rotation of third connector sleeve 222, as a result of the rotation of the third coupling shaft 64b of handle assembly 100, second coupling shaft 261 is caused to be rotated, which in turn causes hollow shaft 269 to rotate. Rotation of hollow shaft 269 results in contemporaneous rotation of the first set of planet gears 262b, which in turn causes washer 262f to rotate second cannulated sun gear 262e. Rotation of second cannulated sun gear 262e causes contemporaneous rotation of the second set of planet gears 262d, which in turn causes knife lead screw 263 to rotate. As knife lead screw 263 is rotated, knife driver 264 is caused to be axially translated, which in turn causes inner flexible band assembly 265 to be axially translated. As inner flexible band assembly 265 is axially translated, support base 265d presses against knife carrier 442 of reload 400 to distally advance knife carrier 442 and fire annular knife 444 of reload 400 against anvil assembly 510 for cutting of tissue clamped in reload 400.
Turning now to
Frame assembly 230 includes first and second proximal spacer members 232a, 232b, and first and second distal spacer members 234a, 234b. When secured together, first and second proximal spacer members 232a, 232b define a pair of inner longitudinal slots 234c for slidably receiving first and second flexible bands 265a, 265b of inner flexible band assembly 265 and a pair of outer longitudinal slots 234d for slidably receiving first and second flexible bands 255a, 255b of outer flexible band assembly 255. First and second proximal spacer members 232a, 232b further define a longitudinal passage therethrough for receipt of first force/rotation transmitting/converting assembly 240 and trocar assembly 270.
First and second distal spacer members 234a, 234b define a pair of inner slots 234c for slidably receiving first and second flexible bands 265a, 265b of inner flexible band assembly 265 and a pair of outer slots 234d for slidably receiving first and second flexible bands 255a, 255b of outer flexible band assembly 255. First and second distal spacer members 234a, 234b further define a longitudinal passage therethrough for receipt of first force/rotation transmitting/converting assembly 240. and trocar assembly 270.
First and second proximal spacer members 232a, 232b and first and second distal spacer members 234a, 234b are formed of plastic to reduce friction with flexible bands 255a, 255b of outer flexible band assembly 255, and flexible bands 265a, 265b of inner flexible band assembly 265.
With reference now to
Adapter assembly 200 further includes a connector sleeve 290 fixedly supported at a distal end of outer tube 206. Connector sleeve 290 is configured to selectively secure securing reload 400 to adapter assembly 200, as will be described in greater detail below. Connector sleeve 290 is also configured to be disposed about distal ends of outer and inner flexible assemblies 255, 265 and trocar assembly 270. In particular, a proximal end of connector sleeve 290 is received within and securely attached to the distal end of outer tube 206 and is configured to engage a stain gauge assembly 320 of adapter assembly 200, and a distal end of connector sleeve 290 is configured to selectively engage a proximal end of reload 400.
With reference now to
Electrical assembly 310 includes a proximal pin connector assembly 312, a proximal harness assembly 314 in the form of a ribbon cable, a distal harness assembly 316 in the form of a ribbon cable, a strain gauge assembly 320, and a distal electrical connector 322.
Proximal pin connector assembly 312 of electrical assembly 310 is supported within inner housing member 204 and drive coupling assembly 210 of knob housing 202. Proximal pin connector assembly 312 includes a plurality of electrical contact blades 312a supported on a circuit board 312b and which enable electrical connection to pass-through connector 66 of plate assembly 60 of outer shell housing 10 of handle assembly 100. Proximal harness assembly 314 is electrically connected to circuit board 312b of proximal pin connector assembly 312 (
Strain gauge assembly 320 is electrically connected to proximal pin connector assembly 312 via proximal and distal harness assemblies 314, 316. Strain gauge assembly 320 includes a strain sensor 320a supported in outer tube 206 of adapter assembly 200. Strain sensor 320a is electrically connected to distal harness assembly 316 via a sensor flex cable 320b. Strain sensor 320a defines a lumen therethrough, through which trocar assembly 270 extends.
As illustrated in
Strain sensor 320a of strain gauge assembly 320 is supported in outer tube 206 and interposed between connector sleeve 290 and support block 292. Support block 292 includes a raised ledge 292b (see
With reference now to
Distal electrical connector 322 includes a plug member 322a, first and second wires 323a, 323b, and first and second contact members 324a, 324b electrically connected to respective first and second wires 323a, 323b. Plug member 322a includes a pair of arms 322b, 322c supporting first and second contact members 324a, 324b, respectively. The pair of arms 322b, 322c are sized and dimensioned to be received within a cavity 461a of chip assembly 460 and about a circuit board assembly 464 of reload 400 when reload 400 is connected to adapter assembly 200.
First and second contact members 324a, 324b of distal electrical connector 322 are configured to engage respective contact members 464b of circuit board assembly 464 of chip assembly 460 of reload 400 when reload 400 is connected to adapter assembly 200.
With reference now to
Rotation assembly 330 includes a lock button 332 operably supported on outer knob housing 202. As will be described in further detail below, when rotation assembly 330 is in an unlocked configuration, outer knob housing 202 and an outer tube 206 are rotatable along a longitudinal axis of adapter assembly 200 relative to drive coupling assembly 210. When rotation assembly 330 is in a locked configuration, outer knob housing 202 and an outer tube 206 are rotationally secured relative to drive coupling assembly 210. In particular, being that outer tube 206 has a curved profile, rotation of outer knob housing 202 and an outer tube 206 about the longitudinal axis of adapter assembly 200 causes handle assembly 100 to be positioned in various orientations relative to adapter assembly 200 in order to provide the clinician with increased flexibility in manipulating the surgical instrument in the target surgical site.
Lock button 332 of rotation assembly 330 is configured to operatively engage inner housing member 204 of adapter assembly 200. Inner housing member 204 is a substantially cylindrical member defining a pair of longitudinal openings for receiving at least portions of first and second force/rotation transmitting/converting assemblies 240, 250 therethrough. Inner housing member 204 includes proximal and distal annular flanges 204a, 204b and further defines proximal and distal outer annular grooves. The proximal annular groove of inner housing member 204 accommodates an inner annular flange of outer knob housing 202 to rotatably secure outer knob housing 202 to inner housing member 204.
With reference still to
With reference to
As mentioned above, rotation assembly 330 of adapter assembly 200 includes a lock button 332 operably supported in an opening of outer knob housing 202 and configured for actuating rotation assembly 330. Rotation assembly 330 further includes a lock shoe 334 disposed between outer knob housing 202 and inner housing member 204 and axially slidable relative to lock button 332 and inner housing member 204. A biasing member 336 is interposed between lock button 332 and lock shoe 334 to urge lock button 332 to a locked position, wherein lock shoe 334 is disposed within one of first, second, and third cutouts 204c, 204d, 204e in distal annular flange 204b of inner housing member 204.
Lock button 332 is configured for operable engagement by a clinician. Lock button member 332 defines an angled cam slot 332a formed therein for receiving a cam pin or boss 334a of lock shoe 334. The biasing member 336 biases lock button 332 and lock shoe 334 away from one another, and urges lock shoe 334 into contact with distal annular flange 204b of inner housing member 204 and into one of first, second, and third cutouts 204c, 204d, 204e in distal annular flange 204b when lock shoe 334 is in registration with one of first, second, and third cutouts 204c, 204d, 204e.
As mentioned above, lock shoe 334 is configured to be selectively received within one of the first, second, and third radial cutouts 204c, 204d, 204e in distal annular flange 204b of inner housing member 204. Specifically, lock shoe 334 includes or defines a shoulder 334a projecting from a surface thereof for receipt in one of the first, second, and third radial cutouts 204c, 204d, 204e in distal annular flange 204b when shoulder 334a of lock shoe 334 is in registration with one of the first, second, and third radial cutouts 204c, 204d, 204e in distal annular flange 204b and lock button 332 is un-depressed. When shoulder 334a of lock shoe 334 is free of any of the first, second, and third radial cutouts 204c, 204d, 204e in distal annular flange 204b (e.g., rotation assembly 330 is in an unlocked condition), outer knob housing 202 is free to rotate relative to inner housing member 204, and thus adapter assembly 200 is free to rotate relative to handle assembly 100.
The operation of rotation assembly 330 will now be described with continued reference to
When lock button 332 of rotation assembly 330 is depressed, as indicated by arrow “A” in
Turning now to
Rotation assembly 330 may be used throughout the surgical procedure to rotate handle assembly 100 and adapter assembly 200 relative to one another.
During rotation of outer knob housing 202 relative to inner housing member 204 and drive coupling assembly 210 of adapter assembly 200, since proximal drive shafts 212, 214, 216 are supported in drive coupling assembly 210, and since first coupling shaft 251 of second force/rotation transmitting/converting assembly 250, second coupling shaft 261 of third force/rotation transmitting/converting assembly 260, and second rotatable proximal drive shaft 281 of first force/rotation transmitting/converting assembly 240 are supported in inner housing member 204, the respective angular orientations of proximal drive shaft 212 relative to second rotatable proximal drive shaft 281, proximal drive shaft 216 relative to second coupling shaft 261, and proximal drive shaft 214 relative to first coupling shaft 251, are changed relative to one another.
Adapter assembly 200 further includes, as seen in
As illustrated in
Reload 400 includes a shipping cap assembly (not shown) that is selectively received on a distal end 402 of reload 400 and can function to facilitate insertion of reload 400 into a target surgical site and to maintain staples “S” (
With reference now to
Housing 410 of reload 400 includes an outer cylindrical portion 412 and an inner cylindrical portion 414. A plurality of ribs (not shown) interconnects outer and inner cylindrical portions 412, 414. Outer cylindrical portion 412 and inner cylindrical portion 414 of reload 400 are coaxial and define a recess 412a (
Staple cartridge 420 of reload 400 is fixedly secured on distal end 410b of housing 410 and includes a plurality of staple pockets 421 formed therein which are configured to selectively retain staples “S”.
With continued reference to
Still referring to
Distal end 452b of bushing member 450 is secured within a proximal end 414a of inner cylindrical portion 414 of housing 410 by a plurality of ridges 452c formed on distal end 452b of bushing member 450.
Chip assembly 460 includes a housing 461 from which annular flange 462 extends. Annular flange 462 extends perpendicular to a longitudinal axis of housing 461. Annular flange 462 is configured to be received about a distal end 452b of bushing member 450.
Chip assembly 460 includes a circuit board assembly 464 secured within a cavity 461a of housing 461. Circuit board assembly 464 includes a circuit board 464a, a pair of contact members 464b and a chip 464c. A first end of circuit board 464a supports chip 464c, and a second end of circuit board 464a supports first and second contact members 464b. Chip 464c is a writable/erasable memory chip. Chip 464c includes the following stored information: lot number, staple size, lumen size, fire count, manufacturing stroke offsets, excessive force index, shipping cap assembly presence, and demonstration modes. Chip 464c includes write capabilities which allow handle assembly 100 to encode to chip 464c that reload 400 has been used to prevent reuse of an empty, spent or fired reload.
Proximal end 410a of housing 410 is configured for selective connection to connector sleeve 290 of adapter assembly 200. Specifically, outer cylindrical portion 412 of housing 410 terminates in a proximal cylindrical flange 412a having an inner diameter which is larger than a diameter of a distal end portion 290a of connector sleeve 290 of adapter assembly 200. Further, proximal end 432a of driver adapter 432 has an outer diameter which is smaller than the diameter of distal end portion 290a of connector sleeve 290.
Reload 400 includes a compressible release ring 413 supported on flange 412a of outer cylindrical portion 412 of housing 410. Release ring 413 has a substantially ovoid profile including a relative long axis and a relative short axis. In operation, when radially inward directed forces act along the long axis of release ring 413 (as indicated by arrows “A1” of
Release ring 413 includes a ramp feature 413a projecting radially inwardly and located substantially along the short axis of release ring 413. Ramp feature 413a of release ring 413 extends through a window 412b defined in flange 412a of outer cylindrical portion 412 of housing 410. Ramp feature 413a of release ring 413 projects sufficiently radially inwardly so as to be selectively received in a window 290b defined in distal end portion 290a of connector sleeve 290.
Reload 400 includes a retaining ring 415 connected to outer cylindrical portion 412 of housing 410 and configured to help retain release ring 413 on outer cylindrical portion 412 of housing 410.
For radial alignment and clocking of reload 400 with adapter assembly 200, reload 400 includes a longitudinally extending rib 412c projecting radially inwardly from outer cylindrical portion 412 of housing 410 which is configured for slidable receipt in a longitudinally extending slot 290c defined in distal end portion 290a of connector sleeve 290.
To connect reload 400 with adapter assembly 200, rib 412c of reload 400 is radially aligned with longitudinally extending slot 290c of connector sleeve 290 of adapter assembly 200. reload 400 and adapter assembly 200 are then axially approximated towards one another until distal end portion 290a of connector sleeve 290 is received within flange 412a of outer cylindrical portion 412 of housing 410 and until ramp feature 413a of release ring 413 is received in window 290b of connector sleeve 290. reload 400 and adapter assembly 200 are thus locked together.
When reload 400 is connected with adapter assembly 200, distal electrical connector 322 of adapter assembly 200 is mechanically and electrically connected to chip assembly 460 of reload 400.
To disconnect reload 400 and adapter assembly 200 from one another, release ring 413 is squeezed along the long axis thereof (in the direction of arrows “A1”) to thereby remove ramp feature 413a of release ring 413 from within window 290b of connector sleeve 290, and thus allowing reload 400 and adapter assembly 200 to be axially separated from one another.
Referring now to
Anvil assembly 510 includes a head assembly 512 and a center rod assembly 514. Head assembly 512 includes a post 516, a housing 518, a cutting ring 522, a cutting ring cover 523, an anvil plate 524, a spacer or washer 525, a cam latch member 526, and a retainer member 527. Post 516 is centrally positioned within housing 518.
With reference still to
Cutting ring 522 includes a central opening which is positioned about post 516 within an inner annular recess of housing 518 between post 516 and outer annular recess 528. Cutting ring 522 is formed from polyethylene. Cutting ring cover 523 is secured to an outwardly facing or proximal surface of cutting ring 522.
Retainer member 527 is positioned in the inner annular recess between cutting ring 522 and a back wall of housing 518. Retainer member 527 is annular and includes a plurality of deformable tabs which engage a rear surface of cutting ring 522. Retainer member 527 prevents cutting ring 522 from moving or being pushed into the inner annular recess of housing 518 until a predetermined force sufficient to deform the tabs has been applied to cutting ring 522. When the predetermined force is reached, e.g., during cutting of tissue, cutting ring 522 is urged into the inner annular recess 536 and compresses the retainer members.
Turning back to
Cam latch member 526 is pivotally mounted within a transverse slot of post 516 of housing 518 and about pivot member 562. Cam latch member 526 has an outer cam profile which permits plunger 554 to move forward as cam latch member 526 rotates in a clockwise direction, and permits plunger 554 to be retracted as cam latch member rotates in a counter-clockwise direction.
Plunger 554 is slidably positioned in a bore formed in the first end of center rod 552. Plunger 554 includes an engagement finger which is offset from the pivot axis of anvil head assembly 512 and biased into engagement with an edge of cam latch 526. Engagement of the finger of plunger 554 with the edge of cam latch 526 presses a leading portion of the edge of cam latch 526 against an inner periphery of cutting ring 522 to urge anvil head assembly 512 to an operative or non-tilted position on center rod 552.
Anvil head assembly 512 may be tilted relative to anvil center rod assembly 514 in a pre-fired tilted position. Tilting of anvil head assembly 512 relative to anvil center rod assembly 514 causes the body portion of cam latch member 526 to engage a finger 166 of plunger 554. As cam latch member 526 rotates with the tilting of anvil head assembly 512, plunger 554 is retracted with the bore of anvil center rod assembly 514, thereby compressing spring 556. In this manner, finger 566 of plunger 554 is distally biased against the body portion of cam latch member 526.
With reference to
With reference now to
Irrigation tube 590 terminates at a proximal end 590a thereof with a proximal luer fitting 591 configured to connect to a syringe (not shown), and at a distal end 590b with a distal fitting 592 configured to selectively snap-fit connect to a port 410c of housing 410 of reload 400. Distal fitting 592 includes a pair of resilient fingers 592a configured to engage respective shoulders 410d defined in port 410c of housing 410.
With reference to
The battery 144 and the motor 152 are coupled to the motor controller circuit board 142a having a motor controller 143 which controls the operation of the motor 152 including the flow of electrical energy from the battery 144 to the motor 152. The main controller circuit board 142b (
The motor controller 143 is coupled to the main controller 147, which includes a plurality of inputs and outputs for interfacing with the motor controller 143. In particular, the main controller 147 receives measured sensor signals from the motor controller 143 regarding operational status of the motor 152 and the battery 144 and, in turn, outputs control signals to the motor controller 143 to control the operation of the motor 152 based on the sensor readings and specific algorithm instructions, which are discussed in more detail below. The main controller 147 is also configured to accept a plurality of user inputs from a user interface (e.g., switches, buttons, touch screen, etc. coupled to the main controller 147).
The main controller 147 is also coupled to a memory 141 that is disposed on the main controller circuit board 142b. The memory 141 may include volatile (e.g., RAM) and non-volatile storage configured to store data, including software instructions for operating the power handle 101. The main controller 147 is also coupled to the strain gauge 320 of the circular adapter assembly 200 using a wired or a wireless connection and is configured to receive strain measurements from the strain gauge 320 which are used during operation of the power handle 101.
The reload 400 includes a storage device 405 (e.g., chip 464c). The circular adapter assembly 200 also includes a storage device 407. The storage devices 405 and 407 include non-volatile storage medium (e.g., EEPROM) that is configured to store any data pertaining to the reload 400 and the circular adapter assembly 200, respectively, including but not limited to, usage count, identification information, model number, serial number, staple size, stroke length, maximum actuation force, minimum actuation force, factory calibration data, and the like. In embodiments, the data may be encrypted and is only decryptable by devices (e.g., main controller 147) have appropriate keys. The data may also be used by the main controller 147 to authenticate the circular adapter assembly 200 and/or the reload 400. The storage devices 405 and 407 may be configured in read only or read/write modes, allowing the main controller 147 to read as well as write data onto the storage device 405 and 407.
Operation of the handle assembly 100, the circular adapter assembly 200, and the reload 400 is described below with reference to
After the power handle 101 is inserted into the shell housing 10, the power handle 101 verifies that it is properly inserted into the shell housing 10 by establishing communications with the electrical connector 66 of the shell housing 10, which has a chip (not shown) disposed therein. The chip within the electrical connector 66 stores a usage counter which the power handle 101 uses to confirm that the shell housing 10 has not been previously used. The data (e.g., usage count) stored on the chip is encrypted and is authenticated by the power handle 101 prior to determining whether the usage count stored on the chip exceeds the threshold (e.g., if the shell housing 10 has been previously used).
With reference to
After circular adapter assembly 200 is calibrated, an unused reload 400, with the shipping cap assembly 401, is coupled to circular adapter assembly 200. The handle assembly 100 verifies that circular reload 400 is attached to circular adapter assembly 200 by establishing communications with the storage device 405 of circular reload 400. With reference to
The power handle 101 also performs calibration with the reload 400 attached to the circular adapter assembly 200 to determine a starting hard stop position. The main controller 147 calculates the distance travelled by the motors 152, 154, 156 to determine the hard stop. The main controller 147 also utilizes the traveled distance during calibration to confirm that the reload 400 is unused. Thus, if the traveled distance is determined to be above a predetermined hard stop threshold, then the main controller 147 confirms that the staples were previously ejected from the reload 400 and marks the reload 400 as used, if the reload 400 was not properly marked before. Once the anvil assembly 510 is attached, the main controller 147 performs another calibration.
With continued reference to
In embodiments, the circular adapter assembly 200 also operates with reloads 400 having disposable trans-anal/abdominal introducers. Once the reload 400 with the introducer is attached, handle assembly 100 shows a ready screen. This allows the user to insert circular adapter assembly 200 along with the reload 400 more easily through intra-abdominal incisions. Thus, when the toggle control button 30 is pressed, a prompt for ejecting the introducer is displayed, which is similar to the animation for ejecting the shipping cap assembly 401. The user depresses the upper portion of the toggle control button 30, which activates an automatic extension (and retraction) of the trocar member 274 until the introducer is ejected, at which point the introducer ejection process is complete.
With continued reference to
With reference to
During clamping, the anvil assembly 510 is retracted toward the circular reload 400 until reaching a fully compressed position, namely position of the anvil assembly 510 at which the tissue is fully compressed between the anvil assembly 510 and the reload 400. Fully compressed distance varies for each of the different types of reloads (e.g., the distance is about 29 mm for 25 mm reloads). While clamping, the strain gauge assembly 320 continuously provides measurements to the main controller on the force imparted on the first rotation transmitting assembly 240 as it moves the anvil assembly 510.
With reference to
Once the anvil assembly 510 reaches the third distance marker 604 at the end of the second segment, the power handle 101 performs a rotation verification to check position of the anvil assembly 510. Then the main controller commences a controlled tissue compression (“CTC”) algorithm which varies the clamping speed during tissue compression without exceeding a target compression force.
The CTC accounts for slow-changing and rapid-changing forces imparted on the tissue during compression with a second-order predictive force filter. As the predicted force approaches the target force, the clamping speed is slowed to prevent over-shoot. When the measured force reaches the target force and the clamp gap has not yet been achieved, clamping is stopped to allow for tissue relaxation. During tissue relaxation, after the measured force falls below the target clamping force, the CTC recommences. The force exerted on tissue is derived from the strain measurements by the main controller 147 from the strain gauge assembly 320.
During CTC, the user continues to press down on the toggle control button 30 to continue operation of handle assembly 100. The third distance marker 604, at which the controller commences the CTC, corresponds to the distance at which the anvil assembly 510 begins to compress the tissue against the staple guide of the circular reload 400 for the remainder of the clamping process. CTC controls the movement of the anvil assembly 510 during a third segment, from the third distance marker 604 to a fourth distance marker 606, which corresponds to the fully compressed position of the anvil assembly 510. CTC continues until the anvil assembly 510 reaches the fourth distance marker 606. During clamping, if no forces are detected, the handle assembly 100 identifies that the anvil assembly 510 is missing and the handle assembly 100 issues an error.
The CTC is run for a predetermined time period, namely, a first time period, and an optional second time period. During execution of the CTC, the main controller monitors force based on strain as measured by the strain gauge assembly 320 that is imparted on the first rotation transmitting assembly 240 as it moves the anvil assembly 510 until the measured force approaches the target clamping force.
During execution of the CTC, the main controller 147 determines whether the measured forces approaches the target clamping force by calculating a predicted clamping force using a second-order predictive filter. Target clamping force may be any suitable threshold from about 100 pounds to about 200 pounds, in embodiments, the target clamping force may be approximately 150 pounds. The CTC calculates a predicted clamping force and compares it to the target clamping force. The main controller samples a plurality of strain gauge values at predetermined frequency (e.g., every 1 millisecond) during a predetermined sampling time period. The main controller 147 then uses a first plurality of strain gauge samples obtained during the sampling time period to calculate a filtered strain gauge value. The main controller 147 stores a plurality of filtered strain gauge values and uses three strain gauge samples to predict the target clamping force. In particular, the main controller 147 initially calculates a first difference between the first two (e.g., first and second) filtered strain gauge values, which provides a first-order comparison. More specifically, the main controller 147 then calculates a second difference between subsequent two filtered strain gauge values (e.g., second and third values). In embodiments, the subsequent filtered strain gauge values may be any other subsequent values, rather than encompassing the second value used to calculate the first difference. The first difference is then divided by the second difference, to obtain a percentage of the difference. The main controller determines the target clamping force based on a predicted strain change, which is calculated by multiplying the first difference by the percentage of the difference and a value representing future periods of strain extrapolation. The predicted strain change is then added to the current filtered strain gauge value to determine a predicted strain value, which corresponds to the predicted clamping force.
If the predicted clamping force is above the target force, the PWM voltage driving the motor 152, which is driving the first rotation transmitting assembly 240 is set to zero. The force is continued to be monitored, and once the force drops below a target threshold, the speed of the motor 152 is set to an updated speed to continue the clamping process. This process repeats until the fourth distance marker 606 is reached.
The target speed is calculated by the main controller 147 based on a strain ratio. The strain ratio is calculated by subtracting the predicated strain value from the target clamping force and dividing the difference by the target clamping force. The strain ratio is then used to determine a speed offset by multiplying a difference between maximum and minimum speeds of the motor 152 by the strain ratio. The speed offset is then added to the minimum speed of the motor 152 to determine the target speed. The target speed is used to control the motor 152 in response to the motor deviating by a predetermined amount from currently set speed (e.g., if the motor 152 deviates by about 50 revolutions per minute). In addition, the motor 152 is set to a newly calculated target speed, if the current speed of the motor 152 is zero, e.g., following the predicted clamping force approaching the target force. This allows for varying the speed of the motor 152 while maintaining the desired force on the tissue during clamping.
The target clamping force is fixed for the first time period. When thick tissue is encountered, the clamp gap may not be attained within the first time period (e.g., reaching the fourth distance marker 606), clamping is stopped and the operator is notified via the display screen. If the operator chooses to continue the clamping operation, CTC continues to operate for the second time period, during which the target clamping force is incremented until the maximum force is reached. During the second period, clamping movement distance is monitored to determine if the anvil assembly 510 is moved in response to incremental force increases. Thereafter, the clamp distance is periodically monitored for any minimal movement. If no minimal movement is detected, the target force is dynamically incremented by a proportional amount based on a difference between the current clamp position and the fourth distance marker 606. If a maximum force, which is higher than the target clamping force, is detected, all clamping is stopped. In addition, if clamping is not achieved within the second time period, then the CTC issues an alarm. This may include instructing the user on the display screen 146 to check the clamp site for obstructions. If none are found, the user may continue the clamping process. If the clamping is not complete, e.g., second time period expires and/or the maximum force limit is reached, another alarm is triggered, instructing the user to check tissue thickness and to use a larger reload 400 to restart the clamping process.
With reference to
During CTC, the strain gauge assembly 320 continuously provides measurements to the main controller on the force imparted on the first rotation transmitting assembly 240 as it moves the anvil assembly 510. The force measured by the strain gauge assembly 320 is represented by the gauge on the display screen 146, which is separated into three zones, zone 1 shows the force from 0% to 50% of the target clamp force, zone 2 shows the force from 51% to 100%, and zone 3 shows the maximum force above the target clamp force. High force caution graphic is displayed on screen for zone 3, the user is required to perform a second activation of the toggle to confirm clamping despite zone 3 high forces.
The user can then press the toggle control button 30 to re-clamp, which would move the anvil assembly 510 until the force reaches the maximum force limit of zone 3. This allows for further compression of the tissue in certain circumstances where the user deems it necessary, e.g., based on tissue thickness. Once the CTC algorithm is complete and tissue is compressed, handle assembly 100 activates an LED and issues a tone indicating the same and the CTC screen indicating 100% compression is continuously displayed on the display screen 146 until the stapling sequence is started. A pre-fire calibration is performed prior to commencement of the stapling sequence.
With reference to
To commence the stapling sequence, the user presses down on the toggle control button 30, which moves the second rotation transmitting assembly 250 to convert rotation to linear motion and to eject and form staples from circular reload 400. In particular, during the firing sequence, the second motor 152 advances the driver 434 using the second rotation transmitting assembly 250. The force imparted on the second rotation transmitting assembly 250 is monitored by the strain gauge assembly 320. The process is deemed complete once the second rotation transmitting assembly 250 reaches a hard stop corresponding to a force threshold and detected by the strain gauge assembly 320. This indicates that the staples have been successfully ejected and deformed against the anvil assembly 510.
With reference to
During the first segment, the second motor 154 advances the driver 434 until the driver 434 contacts the staples to commence firing. The main controller 147 also writes to the storage devices 405 and 407 of the reload 400 and the circular adapter assembly 200. In particular, main controller 147 marks the reload 400 as “used” in the storage device 405 and increments the usage count in the storage device 407 of the circular adapter assembly 200.
After reaching the second distance marker 610, the second motor 154 is operated at the second, slower speed to eject the staples from the reload 400. With reference to
If the measured force is above the maximum stapling force, which may be about 500 lbs., the main controller 147 stops the second motor 154 and displays a sequence on the display 146 instructing the user the steps to exit the stapling sequence. However, the user may still continue the stapling process without force limit detection by pressing on toggle control button 30.
The main controller 147 determines that the stapling process is completed successfully, if the second motor 154 reached a third distance marker 612 associated with stapled tissue and during this movement the measured strain was within the minimum and maximum stapling force limits. Thereafter, the second motor 154 retracts the driver 434 to a fourth distance marker 614 to release pressure on the tissue and subsequently to the second distance marker 610 prior to starting the cutting sequence.
The main controller 147 is also configured to account for band compression of outer flexible band assembly 255 during the stapling process which may result in a non-linear relationship between motor position as determined by the main controller 147 and position of components of the circular adapter assembly 200. The main controller 147 is configured to resolve the discrepancy between the calculated position of the motors 152, 154, 156 and the actual position of the components of the circular adapter assembly 200 using a second order mapping of force changes that result in the discrepancies. The force changes are based on the strain measurements from the strain gauge assembly 320. In particular, the main controller 147 maintains a count of lost turns by the motors 152, 154, 156, namely, turns that did not result in movement of the components of the circular adapter assembly 200, e.g., due to compression, based on the force imparted on the components of the circular adapter assembly 200. The main controller 147 accumulates the total lost turns each time the imparted force changes by a predetermined amount, e.g., about 5 lbs. The motor position is then adjusted by the total accumulated lost-turns value to determine whether the target position has been attained.
With reference to
With reference to
With reference to
During the first segment, the third motor 156 advances the knife assembly 440 until the knife assembly 440 contacts the stapled tissue. After reaching the second distance marker 618, the third motor 154 is operated at the second, slower speed to cut the stapled tissue. With reference to
The main controller 147 determines that the stapling process is completed successfully, if the knife assembly 440 being moved by the third motor 156 reached a third distance marker 620 associated with cut tissue and during this movement the measured strain was within the target and maximum cutting force limits. Thereafter, the third motor 154 retracts the knife assembly 440 back to the first distance marker 616.
Each of the distance markers 600-620 are stored in the memory 141 and/or the storage device 405 and are used by the main controller 147 to control the operation of the power handle 101 to actuate various components of the circular adapter assembly 200 based thereon. As noted above the distance markers 600-620 may be different for different type of reloads accounting for variations in staple size, diameter of the reload, etc. In addition, the distance markers 600-620 are set from the hard stop as determined during the calibration process described above.
With reference to
With reference to
The powered stapler according to the present disclosure is also configured to enter recovery states during the clamping, stapling, and cutting sequences if any of the components, e.g., the power handle 101, circular adapter assembly 200, circular reload 400, and/or the anvil assembly 510, encounter errors. The recovery states are software states executed by main controller 147 that guide the user through correcting and/or troubleshooting the errors and allow the user to resume any of the clamping, stapling, and cutting sequences once the error is corrected.
At the start of each operational sequence (e.g, clamping, stapling, firing, etc.), the main controller 147 writes to the storage device 407 of the circular adapter assembly 200 a recovery code associated with the operational sequence. Thus, at the start of the procedure the storage device 407 stores an initialization recovery code indicating that the circular adapter assembly 200 has not yet been used. However, as the circular adapter assembly 200 is used throughout the procedure, namely, progressing through the different sequences described above, corresponding recovery codes are written to the storage device 407. In addition, the main controller 147 writes corresponding recovery states to the memory 141. In either instance, this allows for replacement of either of the adapter assembly 200 and/or the power handle 101 depending on the error state as both of the components store the last recovery state locally, namely, in the storage device 407 or the memory 141, respectively.
With reference to
When an adapter assembly 200 is attached to the power handle 101, the power handle 101 reads the recovery code from the storage device 407 to determine the state of the adapter assembly 200. The recovery code was written when the adapter assembly 200 was previously detached from the power handle 101. As noted above, at the start of the procedure, the recovery code indicates the initial state, which directs the power handle 101 to transition into start-up sequence, e.g., calibration. If the adapter assembly 200 was detached in the middle of the procedure, e.g., clamping, stapling, cutting, etc., the corresponding recovery code provides the entry point back into the mainline flow after performing a recovery procedure. This allows the operator to continue the surgical procedure at the point where the adapter assembly 200 was originally detached.
Similarly, in situations where the power handle 101 is being replaced, a new power handle 101 is configured to read the recovery state from the adapter assembly 200. This allows the new power handle 101 to resume operation of the previous power handle 101. Thus, during any of the operational sequences, e.g., clamping, stapling, and cutting, the adapter assembly 200 may be left in the corresponding configuration, e.g., clamped, stapled, etc., and after the new power handle 101 is attached, operation may be resumed.
It will be understood that various modifications may be made to the embodiments of the presently disclosed adapter assemblies. Therefore, the above description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the present disclosure.
This application claims the benefit of and priority to U.S. Provisional Patent Application Nos. 62/517,297 filed Jun. 9, 2017, and 62/517,276 filed Jun. 9, 2017, the entire disclosure of which are incorporated by reference herein.
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