1. Technical Field
The present disclosure relates generally to a device, a system, and a method of electrosurgery and, more particularly, to a method and device adapted for single incision laparoscopic surgery (SILS) to maximize the manipulability of electrosurgical instruments used during a SILS procedure.
2. Background
Two popular electrosurgical techniques are monopolar electrosurgery and bipolar electrosurgery. Monopolar electrosurgical techniques deliver alternating current electrosurgical energy from an exposed or an active electrode, through the patient's body, to a return pad or an electrode which is externally attached to a suitable location on the patient's skin. Bipolar electrosurgical methods deliver electrosurgical energy from a first exposed electrode in which both the first and the second electrodes are typically disposed within the patient's body, for example, the opposing jaws of electrosurgical forceps.
Electrosurgical instruments are devices that deliver radio-frequency (RF) energy to a tissue site, such as an electrosurgical instrument. The term “electrosurgical instrument,” as used herein, is intended to include instruments having a hand-piece attached to an active electrode and used to cauterize, coagulate, and/or cut tissue. Typically, the electrosurgical instrument may be operated by a hand-switch or a foot switch, and are hand-held.
The waveforms produced by the RF source may yield a predetermined electrosurgical effect such as electrosurgical cutting, blending, or coagulation. Coagulation is defined as a process of desiccating tissue, wherein the tissue cells are ruptured and dehydrated. Electrosurgical cutting and dissecting include the application of electrosurgical energy to tissue to produce a cutting, dissecting, and/or dividing effect. Blending includes the function of cutting (dissecting) with the production of a hemostasis effect. Hemostasis is defined as the process of liquefying tissue collagen so that it becomes a fused mass.
The active electrode is an electrically conducting element, which is usually enlongated and may be in the form of a thin blade with a pointed or rounded distal end. Alternatively, the active electrode can include an enlongated narrow cylindrical needle that is either solid or hollow with a flat, rounded, pointed, or slanted distal end. The hand-piece of the electrosurgical instrument is connected to a suitable electrosurgical energy source (generator) that produces the RF energy needed for the operation of the electrosurgical instrument. In general, when performing an operation with an electrosurgical instrument, electrical energy from the electrosurgical generator is conducted through the active electrode to the tissue at the site of the operation and then through the patient to a return electrode. The return electrode is selectively placed on the patient's body and attached to the generator by a conductive material.
One technique for electrosurgery, called single incision laparoscopic surgery (SILS), reduces scanning and accelerates healing. The SILS technique involves making one single small incision, instead of several, through which a surgeon operates. Typically, the surgery is performed around the umbilicus (belly button) area. Fewer incisions result in a faster recovery with less pain.
Within the single incision, typically three or four ports are placed for the insertion of electrosurgical instruments to the operative field. Usually, two or three ports are used for devices having a 5 mm diameter and at least one larger port having a 10 to 12 mm diameter to allow for the insertion of an endoscope. Since all the channels are parallel to one another within a single incision, the instrument handles often line up and interfere with each other. This problem may be offset somewhat by making a larger incision in the patient with the resultant delay in healing and increased scarring.
The present disclosure is directed to a device, a system, and a method for electrosurgery, e.g., single incision laparoscopic surgery (SILS), to permit a surgeon to more easily use multiple electrosurgical instruments within a single access point, e.g., an incision, while minimizing interference between the instruments. In particular, multiple embodiments of shafts for electrosurgical instruments and electrosurgical methods adapted for this purpose are disclosed.
Disclosed herein is an electrosurgical instrument including a housing having a selectively contourable shaft that extends therefrom and at least one electrode disposed at a distal end of the shaft adapted to connect to all electrosurgical generator, wherein the shaft is selectively contourable to maximize the manipulability of the shaft when used with other instruments during a single incision laparoscopic surgery.
The shaft may be selectively contour able to form a contour selected from the group consisting of generally S shaped shafts, generally U shaped shafts, generally W shaped shafts, and generally sinusoidal shaped shafts.
The shaft may be selectively contourable to form two generally right angles defined therein.
The shaft may be made from a shape memory material.
The shaft may include a series of joints.
The shaft may include a helical coil.
A handle may be coupled to the shaft at a proximal end thereof, the handle being movable relative to the shaft.
The shaft may be sufficiently rigid to resist application of ordinary forces and torques applied during an electrosurgical procedure.
Also disclosed is a method of adjusting a contour of a shaft of an electrosurgical instrument to maximize manipulability of the instrument when used for an electrosurgical procedure, including the steps of: determining values for variables including instrument type, instrument number, number of instruments, and diameter of instrument shafts; inputting the values of the variables into a database, selecting an appropriate contour from the database's recommended contours; and adjusting the contour of the shaft to correspond with one of the recommended contours.
The method may further include the step of using a template to adjust the contour of the shaft. The template may include a contour displayed on a surface. The template may include a surface having a plurality of apertures configured as a grid adapted for the reception of pegs, wherein the pegs are adapted for the reception of an electrosurgical instrument shaft. The template may include a surface adapted for receiving a shaft of an electrosurgical instrument and a series of apertures adapted to receive screws along a non-parallel surface thereof for applying pressure to the shaft along predetermined points.
The database may include a list of preferred shapes for an electrosurgical shaft corresponding to a permutation of variables selected from the group consisting of instrument type, instrument model, shaft diameter, number of instruments, location of incision, size of incision, and physical characteristics of a user.
Also disclosed is an electrosurgical system including an electrosurgical generator adapted to connect to an electrosurgical instrument, the electrosurgical instrument having a contourable shaft including a distal end and a proximal end, and at least one electrode located proximate the distal end of the shaft, wherein the shaft is selectively contourable to maximize the manipulability of the shaft when used with other instruments during a single laparoscopic surgery.
By way of description only, embodiments of the disclosure are described with reference to the accompanying drawings in which:
Particular embodiments of the present disclosure will be described herein with reference to the accompanying drawings. As shown in the drawings and as described throughout the following description, and as is traditional when referring to relative positioning on an object, the term “proximal” refers to the end of the apparatus that is closer to the user and the term “distal” refers to the end of the apparatus that is further from the user. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the present disclosure in unnecessary detail.
As seen in
In embodiments, an end effector may be, but is not limited to, a cutting device, forceps, or a suction coagulator As shown in
In an embodiment, the generator may include a switch (not shown) to deliver either RF-current suitable for cutting or RF-current suitable for coagulation by applying, for example, suitable RF voltage to either the coagulation electrode pair 3 and 6 or the cutting electrode pair 5 and 6. The switch may be on the instrument or may be a handswitch or a footswitch.
As shown in
In an embodiment, as shown in
The shape of the shaft can be made to be adjustable in several ways, including, but not limited to the shaft being made of a shape memory material, comprising a series of joints, as shown in
The shaft may be made of a material sufficiently rigid to resist the application of ordinary forces and torques applied to the device during an electrosurgical procedure. For instance, in one embodiment, the shaft 2 is made from any bendable material, including a shape memory alloy, including but not limited to AgCd, AuCd, CuAlNi, CuSn, CuZnSi, CuZnAl, CuZnSn, FePt, MnCu, FeMnSi, Pt alloys, CoNiAl, CoNiGa, TiPd, NiTi, and CuAlNi. Shape memory allows have the ability to be bent into a variety of shapes and will hold that shape until heated above a transition temperature, whereupon they will revert back to the original shape.
Alternatively, a series of joints and/or a helical coil may comprise the shaft 2 of the cutting device 100. The shaft 2 may be locked in place once the shaft's desired shape is achieved.
A method of preparing electrosurgical instrumentation for insertion into an incision within a patient, e.g., for use in single incision laparoscopic surgeries (SILS), includes the steps of providing a template displaying a shape corresponding to a desired shape for a shaft of an electrosurgical device and bending the shaft of the electrosurgical device in conformance with the shape determined by the template.
A database of recommended shaft configurations determined by a permutation of variables including, but not limited to, type or model number of an instrument, shaft diameter, location and size of an incision, the number of instruments to be inserted into the incision, and the physical characteristics of the user such as the size of the user's hands. As seen in
In a further embodiment, a surgeon may quickly and easily determine the curvature necessitated by a particular procedure by using a template, as shown in
Alternatively, a template 300 may include a surface including a plurality of holes 301 corresponding to a grid 305 adapted for the insertion of push pins 302, as shown in
Once the push pins 302 are inserted into the holes 301 within the surface 304 of the template 300 as specified in a database detailing the placement of the push pins 302 along the grid 305, a user may fit the shaft 2 between the push pins 302 until the shaft 2 conforms to the desired configuration for the particular procedure.
In an embodiment, a template 400 for adjusting the shape of an electrosurgical device shaft including a box 600 having an opening 603 along one face of the box 600 and a series of screws 605 along another face of the box that is not parallel to the face having the opening 605. A marked thread 602 can be used to indicate the depth of the screw. In an embodiment, a database can indicate the desired depth of each screw 605 to achieve a desired shaft 2 contour upon the insertion of shaft 2. It is envisioned that one skilled in the art may make obvious substitutions for certain elements disclosed herein. For example, without limitation, it should be understood that the term “screw” connotes any device capable of maintaining a fixed position once inserted into a hole.
Exemplary shapes of the shafts of the electrosurgical devices include a shaft having the shape of two substantially inversely symmetrical L's (
It is envisioned that the present disclosure will permit a surgeon to more easily manipulate multiple instruments within a single access point. In particular, a greater range of manipulability is achieved by selecting electrosurgical instruments having shaft configurations purposefully designed to reduce the likelihood that the shafts will impede each shaft's range of motion.
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