The present disclosure relates generally to assemblies for coupling a trocar assembly to a surgical stapler. More particularly, the present disclosure relates to assemblies for securely coupling a trocar assembly partially within an elongated body portion of a surgical stapler.
Anastomosis is the surgical joining of separate hollow organ sections. Typically, an anastomosis procedure follows surgery in which a diseased or defective section of hollow tissue is removed, and the end sections are stapled via a surgical stapler. Depending on the desired anastomosis procedure, the end sections may be joined by circular or side-to-side organ reconstruction methods, for instance.
In a circular anastomosis procedure, the two ends of the organ sections are joined by means of a surgical stapler which drives a circular array of staples through the end section of each organ section and simultaneously cores any tissue interior of the driven circular array of staples to free the tubular passage. Typically, these surgical staplers include an elongated body portion having a handle portion at a proximal end to actuate the surgical stapler and a staple holding component disposed at a distal end. An anvil assembly including an anvil retention rod with an attached anvil head is mounted to a trocar assembly at the distal end of the surgical stapler adjacent the staple-holding component. Opposed end portions of tissue of the hollow organ(s) to be stapled are clamped between the anvil head and the staple holding component. The clamped tissue is stapled by driving one or more staples from the staple holding component so that the ends of the staples pass through the tissue and are deformed by the anvil head. An annular knife is advanced to core tissue within the hollow organ to free a tubular passage within the organ.
Besides anastomosis of hollow organs, surgical staplers for performing circular anastomosis have been used to treat internal hemorrhoids in the rectum. Typically, during use of a surgical stapler for hemorrhoid treatment, the anvil head and the staple holding-component of the surgical stapler are inserted through the anus and into the rectum with the anvil head and the staple-holding component in an open or unapproximated position. Thereafter, a purse string suture is used to pull the internal hemorrhoidal tissue towards the anvil rod. Next, the anvil head and staple-holding component are approximated to clamp the hemorrhoidal tissue between the anvil head and the staple holding component. During the approximation of the anvil head and the staple-holding component, the trocar assembly engages the anvil retention rod. The surgical stapler is fired to remove the hemorrhoidal tissue and staple the cut tissue.
It may be desirable to select a particular trocar assembly depending on the type of surgical procedure being performed. Further, it may be helpful to remove the trocar assembly after use to facilitate the sanitization thereof, if reusing the trocar assembly is desired, for instance.
According to an embodiment of the present disclosure, a trocar coupling assembly for a surgical stapler includes a housing having opposed openings defining a passage therethrough and the passage is configured to receive a sleeve of a trocar assembly therein. The trocar coupling assembly also includes a release button, a spring, a retention pin, and a clip. The release button is movably coupled to the housing and movable between a relaxed position and a compressed position. The spring is disposed between the housing and the release button, the spring biasing the release button towards the extended position. The retention pin is disposed in a bore of the housing and slidable between extended and retracted position. The clip operatively couples the release button and the retention pin, the clip translatable between first and second positions, the first position biasing the retention pin towards the extended position and the second position moving the retention pin to the retracted position.
The compressed position of the release button and the retracted position of the retention pin may define an unlocked configuration of the trocar coupling assembly. The locked configuration of the trocar coupling assembly may inhibit insertion of a trocar assembly into the passage of the housing. The relaxed position of the release button and the extended position of the retention pin may define a locked configuration of the trocar coupling assembly.
A sleeve of a trocar assembly may be insertable into the passage of the housing with the trocar coupling assembly in the unlocked configuration.
A distal portion of the retention pin may be engageable with a slot in an outer surface of a sleeve of a trocar assembly to maintain a fixed axial relationship between the trocar coupling assembly and a trocar assembly.
A leg of the clip may extend through a pathway of the retention pin.
A bottom surface of the release button may engage a backspan of the clip.
A backspan of the clip may contact a portion of the spring such that moving the release button towards the compressed position urges the spring and the clip towards a bottom surface of the housing.
The trocar coupling assembly may be positionable within a lumen of a tubular shaft.
The housing may be positionable in a lumen of a tubular shaft and a portion of the retention pin may extend through an orifice of the tubular shaft thereby providing a visual indication that the trocar coupling assembly is in the unlocked configuration.
The housing may include a cutout extending parallel to the passage and intersecting the bore of the housing and the cutout may be configured to receive a portion of a plate.
The plate may be secured to a drive band and inhibited from movement in a distal direction with the trocar release assembly in the unlocked configuration.
An extended position of the retention pin may allow proximal and distal movement of the drive band.
In embodiments, a shaft for use with a surgical stapler includes a tubular member and a trocar coupling assembly positionable in the tubular member. The trocar coupling assembly includes a housing having opposed openings and a passage defined between the opposed openings of the housing, the passage including internal threads. The shaft also includes a trocar assembly having a sleeve with an outer surface, the outer surface including a slot extending therethrough and external threads. The external threads are complimentary to the internal threads of the passage such that rotation of the sleeve relative to the housing translates the trocar assembly axially with respect to the housing. A trocar is disposed in a lumen of the sleeve.
In embodiments, a shaft for use with a surgical stapler includes a tubular member with an opening extending through an outer wall thereof, a housing disposed in the tubular member and having opposed openings along a longitudinal axis thereof, a passage defined between the opposed openings of the housing and configured to slidably receive a trocar assembly therethrough. A bore extends through the housing in an orientation transverse to the passage and is in communication with the opening. A fastener is insertable through the opening and the bore, the fastener including a head and a shaft extending therefrom, the shaft including threads on a portion thereof, a distal portion of the shaft insertable into a retention slot of a sleeve of a trocar assembly to fix an axial position of a trocar assembly with respect to the housing.
Embodiments of trocar coupling assemblies for use with a surgical stapler are disclosed herein with reference to the drawings, wherein:
Embodiments of the presently disclosed trocar coupling assembly for a surgical stapler will now be described in detail with reference to the drawings wherein like numerals designate identical or corresponding elements in each of the several views. As is common in the art, the term “proximal” refers to that part or component closer to the user or operator, i.e. surgeon or physician, while the term “distal” refers to that part or component farther away from the user.
Initially, with reference to
With additional reference to
With additional reference to
Another embodiment of the trocar coupling assembly is illustrated in
With additional reference to
Referring now to
As seen in
With additional reference to
The release button 350 has an outer surface 352 that extends through the buttonhole 336 of the tubular shaft 330 (
Another embodiment of the trocar coupling assembly is illustrated in
With continued reference to
With additional reference to
Referring now to
It will be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be construed as limiting, but merely as exemplifications of particular embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto.
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The extended European Search Report dated Feb. 8, 2021 issued in corresponding EP Appln. No 20183412.4. |
Number | Date | Country | |
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20210000472 A1 | Jan 2021 | US |