JP5154050B2 - Inline vascular seal separator - Google Patents

Description

(Cross-reference to related applications)
This application is hereby incorporated by reference. Claims the benefit of the priority of US Provisional Patent Application No. 60 / 722,177 by Dumbold (filed Sep. 30, 2005, entitled "IN-LINE VESSEL SEALER AND DIVIDER"). The entire contents of the above provisional patent application are incorporated herein by reference.

(Technical field)
The present disclosure relates to electrosurgical forceps, and more particularly, the present disclosure relates to elongated, endoscopic combined bipolar and monopolar electrosurgical forceps for sealing and / or cutting tissue.

(background)
Electrosurgical forceps utilize both mechanical clamping and electrical energy to provide hemostasis by heating tissue and blood vessels to coagulate, cauterize and / or seal the tissue. As an alternative to open forceps for use in open surgical procedures, many modern surgeons use endoscopes and endoscopic devices to remotely access an organ through a small puncture-like incision To do. As a direct result, patients tend to benefit from smaller scars and shorter healing times.

  The endoscopic device is inserted into the patient through a cannula or port made with a trocar. Typical sizes for cannulas range from 3 mm to 12 mm. Usually a smaller cannula is preferred. As will be appreciated, this ultimately places design challenges on the device manufacturer. The device manufacturer must find a way to make an endoscopic device that fits through a smaller cannula.

  Many endoscopic surgical procedures require cutting or ligating blood vessels or vascular tissue. Due to the spatial problems inherent in the surgical cavity, surgeons often have other traditional methods of controlling vascular suturing or bleeding (eg, detaching vascular clamps and / or It is difficult to carry out (ligation). By utilizing endoscopic electrosurgical forceps, the surgeon can cauterize by coagulating / coagulating / controlling the intensity, frequency and duration of the electrosurgical energy applied to the tissue via the jaw members. It can be dried and / or can simply reduce or delay bleeding. Most small blood vessels (ie, blood vessels in the range of less than 2 mm in diameter) can often be closed using standard electrosurgical devices and electrosurgical techniques. However, when ligating larger vessels, the surgeon may need to switch the endoscopic procedure to an open surgical procedure, thereby giving up the benefits of endoscopic surgery. Alternatively, the surgeon can seal larger vessels or tissue.

  The process of coagulating vessels is thought to be fundamentally different from electrosurgical vessel sealing. For purposes herein, "coagulation" is defined as the process of rupturing and drying tissue cells to dry the tissue. “Vessel sealing” or “tissue sealing” is defined as the process of liquefying tissue collagen and reforming it into a fused mass. The coagulation of the small vessel is sufficient to permanently close it, while the larger vessel needs to be sealed to ensure permanent closure.

  In order to seal larger vessels (or tissues) efficiently, the two main mechanical parameters (pressure applied to the vessels (tissue) and the spacing between electrodes or tissue seal surfaces) are accurate. Must be controlled. More specifically, the precise application of pressure is important for: facing the vessel walls; reducing the tissue impedance to a sufficiently low value so that sufficient electrosurgical energy is applied to the tissue Allowing it to pass; overcoming the expansion force of the forceps during tissue heating; and contributing to the end tissue thickness, which is an indicator of a good seal. The typical jaw spacing for fusing vessel walls is optimal between 0.001 inch and 0.006 inch. Below this range, the seal may break or tear, and above this range, the lumen may not be properly or effectively sealed.

  For smaller vessels, the relevance of pressure applied to the tissue tends to be lower, while the spacing between the conductive surfaces becomes more important for an effective seal. In other words, the opportunity for two conductive surfaces to contact during actuation increases as the vessel becomes smaller.

  Many known devices include a blade member or a shear member. These members only cut tissue in a mechanical and / or electromechanical manner and are relatively ineffective for the purpose of vascular sealing. Other devices rely on the clamping pressure alone to obtain the proper sealing thickness, spacing tolerances and / or parallelism and flatness requirements (these are consistent and if properly controlled, and It is not designed with regard to parameters that ensure an effective tissue seal. For example, properly controlling the thickness of the resulting sealed tissue by controlling only the clamping pressure is difficult for one of the following two reasons: 1) When applied, the two poles are in contact and energy is not transferred through the tissue, which can result in an ineffective seal; or 2) if too little force is applied, the tissue It may move prematurely before activation and sealing and / or a thicker, less reliable seal may be created.

  As mentioned above, a greater closing force is required between opposing jaw members in order to properly and effectively seal larger vessels or tissue. It is known that a large closing force between the jaws typically requires a large actuating force that is necessary to produce a large moment about the pivot axis of each jaw. This poses design challenges for device manufacturers. Equipment manufacturers must compare the advantages of producing a very simplified design with the design disadvantages that may require the user to exert a large closure force to effectively seal the tissue. Don't be. As a result, the designer can reduce the probability of mechanical fatigue by designing a device with metal pins and / or at least partially eliminate these closure forces, and the end user (ie, These large closure forces must be compensated either by designing a device that reduces the surgeon's fatigue.

  Increasing the closing force between the electrodes can have other undesirable effects. For example, an increase in closing force can bring opposing electrodes into close contact with each other and can short circuit. And a small closing force can result in premature movement of tissue during compression and prior to actuation. As a result of these, providing a device that consistently provides a suitable closing force within the preferred pressure range between opposing electrodes increases the probability of a successful seal. As will be appreciated, it is difficult to rely on the surgeon to manually provide the proper closure force within the proper range in a consistent manner, and thus the effectiveness and quality of the resulting seal will vary. obtain. In addition, the overall success of an effective tissue seal is based on the user's expertise, visual acuity, dexterity, and experience in determining the appropriate closure force to seal the vessel equally, consistently and effectively. Greatly depends on. In other words, the success of the seal depends more on the surgeon's ultimate skill than on the capabilities of the device.

Consistent, and effective pressure range for assuring a seal, it is about 3 kg / cm ² ~ about 16 kg / cm ^2, it preferably is working range of ^7kg / cm ^{2 ~13kg} / cm 2 Has been found. Manufacturing a device that can provide a closure pressure within this operating range has been shown to be effective for sealing arteries, tissues and other vessel bundles.

  Various force actuating assemblies have been developed in the past to provide a suitable closing force to provide a vascular seal. For example, one such actuation assembly is available from Valleylab, Inc. of Boulder, Colorado. Developed by (a division of Tyco Healthcare LP). It is intended for use with a Valleylab vascular seal separator (sold generally under the trade name LIGASURE ATLAS®). The assembly includes a mechanical connection with four bars, a spring, and a drive assembly that cooperate to consistently provide and maintain tissue pressure within the operating range. U.S. Patent Application No. 10 / 179,863 (Title of Invention “VESSEL SEALER AND DIVIDER”) (currently Patent Literature 1), No. 10 / 116,944 (Title of Invention “VESSEL SEALER AND” DIVIDER ") (currently, Patent Document 2), 10 / 472,295 (invention name" VESSEL SEALER AND DIVIDER ") (currently, Patent Document 3), and PCT Application No. PCT / US01 / 01890. (Invention name “VESSEL SEALER AND DIVIDER”) and Patent Document 4 (Invention name “VESSEL SEALER AND DIVIDER”) all detail the various operational functions of LIGAURE ATLAS® and various methods related thereto. Mounting to. The entire contents of the above applications are hereby incorporated by reference herein.

  Other force actuating mechanisms or assemblies are described in commonly owned US patent application Ser. No. 10 / 460,926 (Title of Invention “VESSEL SEALE AND DIVIDER FOR USE WITH SMALL TROCARS AND CANNULAS”), and US Pat. No. 10 / 953,757 (title of the invention “VESSEL SEALER AND DIVIDER HAVING ELONGATED KNIFE STRANDE AND SAFETY FOR CUTTING MECHANSIM”). The entire contents of both of which are hereby incorporated by reference herein. As described therein, simpler and more mechanically advantageous motion and drive assemblies are described therein. This assembly facilitates grasping and manipulation of vessels and tissue and reduces user fatigue.

In some surgical operations, bipolar forceps are used in combination with monopolar forceps or a monopolar coagulator to treat tissue and control bleeding during surgery. Thus, and during the course of a particular operation, the surgeon may be required to replace a monopolar device with a bipolar device. This replacement typically includes replacement via a trocar or cannula. As can be appreciated, this can occur more than once over the course of the operation, which can be very time consuming and can unnecessarily unsterilize the device. The device can be subjected to an environment.
US Pat. No. 7,101,371 US Pat. No. 7,083,618 US Pat. No. 7,101,372 International Publication No. 02/080795 Pamphlet

  A compact, simple and cost effective device that combines bipolar and monopolar that can be utilized with a small cannula is desired. Furthermore, it would be desirable to provide an apparatus that includes an easily operable handle and an apparatus body with a mechanically advantageous force actuation assembly to reduce user fatigue.

In order to solve the above problems, the present invention provides, for example, the following.
(Item 1)
Endoscopic forceps, the following:
A housing having a shaft attached to the housing, the shaft comprising a pair of jaw members disposed at a distal end of the shaft;
A drive assembly disposed in the housing, wherein the drive assembly is operable to move the jaw members relative to each other from a first position to a second position; A drive assembly wherein the jaw members are spaced apart from each other and in the second position the jaw members are in close proximity to each other for manipulating tissue;
A pair of handles operably coupled to the drive assembly, wherein the handles are movable relative to the housing such that the drive assembly operates to move the jaw members;
A first switch disposed on the housing and operative to selectively deliver energy of a first potential to at least one jaw member for treating tissue in a monopolar manner. A first switch that is possible; and a second switch, disposed on the housing, for transferring tissue of a first potential to one jaw member for treating tissue in a bipolar manner. Comprising a second switch that is operable to selectively deliver and selectively deliver energy of a second potential to the other jaw member;
Each jaw member is adapted to couple with a source of electrical energy so that the jaw member can transmit energy to treat tissue.
Endoscopic forceps.
(Item 2)
The endoscopic forceps according to item 1, further comprising a knife assembly operably coupled to the housing, wherein the knife assembly is disposed when the jaw member is disposed in the second position. An endoscopic forceps that is selectively operable to advance a knife through tissue disposed between jaw members.
(Item 3)
The endoscopic forceps according to item 2, wherein at least one of the handles comprises a knife lockout, the knife lockout being arranged when the jaw member is positioned in the second position. Endoscopic forceps that prevent the assembly from moving.
(Item 4)
The endoscopic forceps according to claim 3, wherein the lockout mechanism includes a mechanical interface extending from at least one of the handles, the mechanical interface having a first to the housing. The mechanical interface is dimensioned to impede movement of the knife assembly and when the handle is positioned in a second position relative to the housing, An endoscopic forceps dimensioned to allow movement of the knife assembly.
(Item 5)
The endoscopic forceps according to item 1, wherein the forceps includes a monopolar lockout that prevents operation of the first switch when the jaw member is disposed at the first position. Endoscopic forceps.
(Item 6)
The endoscopic forceps according to item 5, wherein the monopolar lockout comprises a mechanical interface disposed on at least one of the handles, the mechanical interface being connected to the housing. The first switch prevents movement of the first switch and allows the first switch to operate when the handle is disposed in a second position relative to the housing. Endoscopic forceps.
(Item 7)
The endoscopic forceps according to item 5, wherein the monopolar lockout comprises a pressure-actuated safety switch disposed on the housing and from a first position relative to the housing. Endoscopic forceps wherein movement of the handle to a second position closes the pressure activated safety switch and allows operation of the first switch.
(Item 8)
The endoscopic forceps according to item 1, wherein the handle of the forceps is disposed on an opposite side of the housing, and from a first position spaced from the housing, a second An endoscopic forceps that is movable to a position closer to the housing.
(Item 9)
The endoscopic forceps according to item 1, wherein the housing includes a pair of slits defined on opposite sides of the housing, and the handle is movable in the slit with respect to the housing. There is an endoscopic forceps.
(Item 10)
The endoscopic forceps according to item 1, wherein the forceps comprises a longitudinal axis defined through the forceps and the handle is disposed at an angle α with respect to the longitudinal axis. Mirror forceps.
(Item 11)
The endoscopic forceps of claim 1, further comprising an intensity controller operable to adjust the intensity of electrosurgical energy to the forceps during operation.
(Item 12)
The endoscopic forceps according to item 11, wherein the intensity controller is operable only in a monopolar mode.
(Item 13)
The endoscopic forceps according to item 11, wherein the intensity controller comprises a slide potentiometer.
(Item 14)
The endoscopic forceps according to item 1, wherein the forceps further includes an electrical safety device, and the electrical safety device has either a bipolar mode or a monopolar mode for any time. An endoscopic forceps that is operable to adjust to act on.
(Item 15)
The endoscopic forceps according to item 1, wherein each of the jaw members includes an insulating housing and a conductive surface, and the conductive surfaces of the jaw members are substantially opposite to each other. At least one of the jaw members comprises a monopolar extension, the monopolar extension extending beyond the insulative housing of the at least one jaw member to allow precise cutting of tissue; Endoscopic forceps.
(Item 16)
Endoscopic forceps, the following:
A housing having a shaft attached to the housing, the shaft comprising a pair of jaw members disposed at a distal end of the shaft;
A drive assembly disposed in the housing, wherein the drive assembly is operable to move the jaw members relative to each other from a first position to a second position; A drive assembly wherein the jaw members are spaced apart from each other and in the second position the jaw members are in close proximity to each other for manipulating tissue;
A pair of handles operably coupled to the drive assembly, wherein the handles are movable relative to the housing such that the drive assembly operates to move the jaw members;
A first switch disposed on the housing and operative to selectively deliver energy of a first potential to at least one jaw member for treating tissue in a monopolar manner. A first switch is possible;
A second switch disposed on the housing for selectively delivering energy of a first potential to one jaw member and treating the tissue in a bipolar manner; and A second switch operable to selectively deliver potential energy to the other jaw member;
With
The first switch and the second switch are independently and exclusively operable with respect to each other;
Each jaw member is adapted to couple with a source of electrical energy so that the jaw member can transmit energy to treat tissue.
Endoscopic forceps.
(Item 17)
An electrosurgical system comprising:
Electrosurgical generator;
Endoscopic forceps, the following:
A housing having a shaft attached to the housing, the shaft comprising a pair of jaw members disposed at a distal end of the shaft, wherein the jaw members are coupled to the electrosurgical generator. Adapted to the housing;
A drive assembly disposed in the housing, wherein the drive assembly is operable to move the jaw members relative to each other from a first position to a second position; A drive assembly wherein the jaw members are spaced apart from each other and in the second position the jaw members are in close proximity to each other for manipulating tissue;
A pair of handles operably coupled to the drive assembly, wherein the handles are movable relative to the housing such that the drive assembly operates to move the jaw members;
A first switch disposed on the housing and operative to selectively deliver energy of a first potential to at least one jaw member for treating tissue in a monopolar manner. A first switch that is possible; and a second switch, disposed on the housing, for transferring tissue of a first potential to one jaw member for treating tissue in a bipolar manner. An endoscopic forceps comprising a second switch that is selectively deliverable and operable to selectively deliver energy of a second potential to the other jaw member;
An electrosurgical system comprising:
(Item 18)
18. The electrosurgical system of item 17, wherein the generator comprises a control circuit that allows independent and exclusive operation of the forceps in either bipolar or monopolar mode. An electrosurgical system comprising a safety circuit operable to permit.
(Item 19)
19. The electrosurgical system according to item 18, wherein the safety circuit is electromechanical and is activated during movement of the pair of handles relative to the housing.
(Item 20)
The electrosurgical system of item 17, wherein the generator comprises a control circuit, the control circuit comprising an isolation circuit operably coupled to the second switch, and the second switch An electrosurgical system operable to regulate the energy to the jaw members while bypassing high current energy around the jaws.

(Summary)
The present disclosure relates to an endoscopic forceps. The endoscopic forceps has a housing, the housing has a shaft attached to the housing, and the shaft includes a pair of jaw members disposed at a distal end thereof. The forceps also includes a drive assembly disposed in the housing. The drive assembly is configured to move the jaw members relative to each other from a first position to a second position, wherein in the first position the jaw members are spaced apart from each other. In a second position, the jaw members are in close proximity to manipulate tissue. A pair of handles are operably coupled to the drive assembly, the handles configured to move relative to the housing such that the drive assembly operates to move the jaw members. Yes. Each jaw member is adapted to couple with a source of electrical energy so that the jaw member can transmit energy for treating tissue.

  A first switch is disposed on the housing and is operable to selectively deliver energy of a first potential to the at least one jaw member for treating tissue in a monopolar manner. is there. A second switch is disposed on the housing and selectively delivers energy of a first potential to one jaw member and treats the second potential to treat tissue in a bipolar manner. It is operable to selectively deliver energy to the other jaw member.

  In one embodiment according to the present disclosure, the forceps also comprises a knife assembly. The knife assembly is operably coupled to the housing. The knife assembly is selectively operable to advance the knife through tissue disposed between the jaw members when the jaw members are in the second position. In yet another embodiment, at least one of the jaw members comprises a monopolar extension that extends beyond the insulative housing of the jaw member to allow precise tissue cutting. To.

  In one particularly useful embodiment, at least one of the handles comprises a knife lockout that is operable when the jaw assembly is in the second position when the jaw member is in the second position. prevent. The lockout mechanism may include a mechanical interface extending from at least one of the handles. The mechanical interface is dimensioned to impede movement of the knife assembly when the handle is disposed in a first (ie, open) position relative to the housing, and the mechanical interface Are dimensioned to allow movement of the knife assembly when the handle is positioned in a second position relative to the housing.

  In another embodiment in accordance with the present disclosure, the forceps includes a monopolar lockout that operates the first switch when the jaw member is disposed in the first position. prevent. In one particularly useful embodiment, the monopolar lockout comprises a mechanical interface disposed on at least one of the handles. The mechanical interface prevents operation of the first switch when the handle is disposed in a first position with respect to the housing, and the handle is in a second position with respect to the housing. When arranged, the operation of the first switch is allowed. The single pole lockout may comprise a pressure activated switch disposed in the housing, thereby allowing movement of the handle from a first position relative to the housing to a second position relative to the housing. The pressure actuated switch is closed to allow operation of the first switch.

  In yet another embodiment in accordance with the present disclosure, the handle of the forceps is disposed on opposite sides of the housing and from a first, spaced position relative to the housing, a second, the above It can be moved closer to the housing. The housing may be configured to include a pair of slits defined on opposite sides of the housing, and the handle may be dimensioned to move within the slit relative to the housing. In one particularly useful embodiment, the housing comprises a longitudinal axis defined through the housing, and the handle is disposed at an angle “α” relative to the longitudinal axis to facilitate handling. To do.

  In yet another embodiment in accordance with the present disclosure, an intensity controller is provided that adjusts the intensity of electrosurgical energy to the forceps during operation. In one particularly useful embodiment, the intensity controller is a slide potentiometer and can only operate in monopolar mode.

  In yet another embodiment, the forceps may comprise an electrical safety device such that the forceps operates in either bipolar or monopolar mode for any amount of time. Adjust. In one particularly useful embodiment, the first switch and the switch are operable independently and exclusively with respect to each other.

  The present disclosure also relates to an electrosurgical system having an electrosurgical generator and an endoscopic forceps. The forceps includes a housing, and the housing has a shaft attached to the housing, and the shaft includes a pair of jaw members disposed at a distal end of the shaft. The jaw member is adapted to couple with the electrosurgical generator. The forceps also includes a drive assembly disposed in the housing. The drive assembly moves the jaw members relative to each other from a first position to a second position, wherein the jaw members are spaced apart from each other in the first position. In the second position, the jaw members are close to each other for manipulating tissue. A pair of handles are operably coupled to the drive assembly and operate the drive assembly to move the jaw members.

  A first switch is disposed on the housing and is operable to selectively deliver energy of a first potential to the at least one jaw member for treating tissue in a monopolar manner. is there. A second switch is disposed on the housing and selectively delivers energy of a first potential to one jaw member and treats the second potential to treat tissue in a bipolar manner. It is operable to selectively deliver energy to the other jaw member.

  In one embodiment, the generator comprises a control circuit, the control circuit having a safety circuit that allows independent and exclusive operation of the forceps in either bipolar or monopolar mode. The safety circuit may be electrical or electromechanical and is activated during movement of the pair of handles relative to the housing. The generator may also include a control circuit that includes an isolation circuit operably coupled to the second switch and while bypassing high current energy around the second switch. Operable to regulate the energy to the jaw members.

  The present invention provides a combined bipolar and monopolar device that can be utilized with small cannulas that are small, simple and cost effective. Furthermore, it is provided to provide an apparatus comprising an easily operable handle and an apparatus body with a mechanically advantageous force actuation assembly to reduce user fatigue.

(Detailed explanation)
Referring now to FIGS. 1A-2, one embodiment of a combination endoscopic bipolar and monopolar forceps 10 is shown for use with a variety of surgical procedures, generally housing 20, handle Assembly 30, rotation assembly 80, knife trigger assembly 70 and end effector assembly 100, which cooperate with each other to grasp, seal and separate tubular vessels and vascular tissue (FIGS. 10A and 10B). . Although most drawings show forceps 10 for use with endoscopic surgical procedures, the present disclosure may be used for more conventional open surgical procedures. For purposes herein, the forceps 10 will be described with respect to an endoscopic instrument; however, an open version of the forceps may also include the same or similar operational components, as described below. Is contemplated.

  The forceps 10 includes a shaft 12 having a distal end 16 sized to mechanically engage the end effector assembly 100 and a proximal end 14 that mechanically engages the housing 20. Further details on how the shaft 12 connects to the end effector are described below. The proximal end 14 of the shaft 12 is received within the housing 20 and the connections associated therewith are also described in detail below. In the drawings and the following description, the term “proximal” refers to the end of the forceps 10 that is closer to the user, as is conventional, and the term “distal” refers to the end that is further from the user.

The forceps 10 also includes an electrosurgical cable 310 that connects the forceps 10 to an electrosurgical energy source (eg, a generator 500 (see FIG. 16). Valleylab, a Tyco Healthcare LP located in Boulder Colorado LP. Generators such as those sold by the division) are bipolar electrosurgical energy for sealing vessels and vascular tissue and monopolar electrosurgical energy typically used to coagulate or cauterize tissue It is envisioned that the generator 500 may have various safety and performance features, including isolated output of accessories, impedance control and / or independent operation. Generator 500 also detects changes in the tissue 200 times per second, For to provide a feedback system that has evolved in order to adjust the voltage and current to maintain appropriate output, .Instant Response ^TM technology that can be configured with a Instant Response ^TM technology Valleylab are surgical procedures It is believed to provide one or more of the following advantages:
A constant clinical effect across all tissue types;
Reduced risk of thermal diffusion and side tissue damage;
Reduced need for “turn up generators”; and design of minimally invasive environments.

  As best shown in FIG. 16, cable 310 is divided into cable leads 310a and 310b, which are connected to one or more connectors, or other so-called “flying leads”. ) "(These are bipolar, single, based on the specific instrument configuration configured to be connected to the generator 500 at a single location and set up by the surgeon as desired or prior to surgery. The electrodes (or any combination thereof) are configured to connect forceps to the electrosurgical generator 500. One example of a universal electrical connector is the division of Tyco Healthcare, LP, Colorado, Boulder, Valleylab, Inc. Is the subject of U.S. Patent Application No. 10 / 718,114 (the entire contents of which are incorporated herein by reference), which is currently being developed by and entitled "CONNECTOR SYSTEMS FOR ELECTROSURGICAL GENERATOR".

  The handle assembly 30 includes two movable handles 30 a and 30 b disposed on opposite sides of the housing 20. Handles 30a and 30b are moveable relative to each other to actuate end effector assembly 100, as described in further detail below with respect to the operation of forceps 10.

  As best shown in the exploded view of FIG. 13, the housing 20 is formed from two housing halves 20a and 20b, each comprising a plurality of interfaces 205, which form the housing 20 and the forceps 10 Dimensioned to mechanically align and engage each other so as to enclose the internal working components. Multiple additional interfaces (not shown) can be placed at various points (eg, energy directions / deflection points) around the perimeter of housing halves 20a and 20b for ultrasonic welding purposes Is assumed. It is also contemplated that the housing halves 20a and 20b (and other components described below) can be assembled together in any manner known in the art. For example, alignment pins, snap-like interfaces, tongue and groove interfaces, locking tabs, adhesive ports, etc. can all be utilized either alone or in combination for assembly purposes.

  The rotating assembly 80 is mechanically connected to the housing 20 and is rotatable about 90 ° in either direction about the longitudinal axis “A” (see FIGS. 1A-2 and 12). Details of the rotating assembly 80 are described in more detail with respect to FIGS. The rotating assembly 80 includes two halves 81a and 81b that, when assembled, form the rotating assembly 80 and then support the elongate shaft 12, which includes the drive assembly 60 and the knife assembly 70. Accommodate. The halves 81a and 81b are dimensioned to mechanically engage with the top flanges 82a and 82b, respectively, of the housing 20 during assembly and to securely engage the two halves 81a and 81b of the rotating assembly 80. Other mechanical interfaces (eg, alignment pins, snap fit interfaces, ultrasonic welds, etc.) may be provided.

  As described above, the end effector assembly 100 is connected to the distal end 16 of the shaft 12 and includes a pair of opposing jaw members 110 and 120 (see FIGS. 3A-3D). Handles 30a and 30b of handle assembly 30 are ultimately connected to drive assembly 60, which together mechanically cooperate to provide movement of jaw members 110 and 120 from an open position to a clamped or closed position. To do. In the open position, jaw members 110 and 120 are spaced apart from each other such that in the clamped or closed position, jaw members 110 and 120 grasp tissue between them (FIGS. 10A and 10B). Collaborate.

  It is envisioned that the forceps 10 may be designed to be fully or partially disposable depending on the particular purpose or to achieve a particular result. For example, the end effector assembly 100 can be selectively and removably engaged with the distal end 16 of the shaft 12 and / or the proximal end 14 of the shaft 12 can be selectively and with respect to the housing 20 and the handle assembly 30. It can be removably engaged. In either of these two examples, the forceps 10 is considered “partially disposable” or “reposable”. That is, a new or different end effector assembly 100 (or end effector assembly 100 and shaft 12) selectively replaces the old end effector assembly 100 if necessary. As can be appreciated, the electrical connections of the present disclosure may have to be changed to alter the instrument to reusable forceps.

  Referring now to the more detailed description of the present disclosure described with respect to FIGS. 1A-16, handles 30a and 30b each include openings 33a and 33b, respectively, defined therein, which A person can grip each respective handle 30a and 30b and move them relative to the difference. Handles 30a and 30b also include ergonomically enhanced gripping elements 39a and 39b disposed along their outer edges, respectively, to facilitate gripping of handles 30a and 30b during operation. Designed. The gripping elements 39a and 39b may be provided with one or more protrusions, scallops and / or ribs to improve gripping.

  As best shown in FIGS. 1A and 7, handles 30a and 30b are outwardly facing on opposite sides from a transverse axis “B” defined through housing 20 that is perpendicular to longitudinal axis “A”. Configured to extend. Handles 30a and 30b are movable relative to each other in a direction parallel to axis “B” to open and close jaw members 110 and 120, as needed during surgery. This forceps style is commonly referred to as “in-line” or hemostatic forceps style forceps compared to so-called “pistol grip” style forceps or endoscopic instruments. Inline hemostatic forceps or forceps are more commonly manufactured for open surgical procedures and are typically connected together that are movable relative to each other to open and close the jaw members located at their distal ends. A pair of shafts having an open handle.

  As best shown in FIG. 5A and shown above, the handles 30a and 30b are mechanically connected to the housing 20, movable relative to the housing (and relative to each other), and open or spaced around the tissue. The jaw members 110 and 120 are moved from the open configuration to the closed position. Each handle (eg, handle 30a shown in FIG. 7) is also configured to extend downward at an angle α (a) relative to longitudinal axis “A”. It is envisioned that manufacturing handles 30a and 30b to extend in this manner facilitates and improves gripping and manipulation of forceps 10 during operating conditions. The angle (a) of the handles 30a and 30b of the forceps 10 allows the user to essentially "customize" the handles 30a and 30b for a particular use for a particular hand size. It is envisioned that it may be adjustable. Alternatively, the different forceps 10 may have different pre-fixed angles (with a particular surgery) for a particular hand size (ie, small, medium, and large) and / or for other surgical purposes. It can be manufactured with a). In certain useful embodiments, it is further contemplated that the handle range angle (a) ranges from about 0 ° to about 35 °.

  As best shown in FIGS. 5A, 5B, 13 and 14, the distal ends 34 and 37 of each handle 30a and 30b, respectively, around pivot pins 34a and 34b attached to the distal end 21 of the housing 20, respectively. It is selectively movable. As described in more detail below, the movement of the handles relative to each other provides movement of the jaw members 110 and 120 relative to each other. Distal ends 34 and 37 are configured to include complementary gear teeth 34a 'and 34b', which are configured to be intermesh with each other to provide a constant of handle members 30a and 30b with respect to each other. Facilitates movement and improves the operation of jaw members 110 and 120.

  In FIG. 14, the proximal end 30a ′ and 30b ′ of each handle 30a and 30b, respectively, has a flange 31a extending from the proximal end 30a ′ and 30b ′ of each handle 30a and 30b toward the housing 20, respectively. 31b. Each of the flanges 31a and 31b includes openings 36c 'and 36d' disposed therein for receiving the ends 36c and 36d of the toggle rings 35a and 35b, respectively. The opposite ends 36a and 36b of the toggle links 35a and 35b are configured to be attached to the actuation collar or drive collar 69 of the drive assembly 60 through corresponding openings 36a 'and 36b' defining the inside. Toggle rings 35a and 35b can be dimensioned in a generally S-shaped configuration for attaching handles 30a and 30b to drive collar 69, or toggle rings 35a and 35b are generally U-shaped to achieve this purpose. It is envisioned that it may be (as disclosed). It is contemplated that sizing toggle rings 35a and 35b in a U-shaped configuration can reduce bending during operation.

  As can be seen, moving the handle 30a and 30b from the open or spaced configuration to the closed position toward the housing pushes the actuation collar 69 proximal to the spring 63, which The drive shaft 17 is then translated proximally to close the jaw members 110 and 120 (see FIGS. 7-9). The operational relationship between the drive collar 69 and the handle assembly 30 is described in detail below with respect to the operation of the forceps 10.

  Handles 30a and 30b push toggle rings 35a and 35b to rotate along longitudinal axis "A" beyond a direction parallel to shaft 17 or longitudinal axis "A" so that upon opening, The force of the spring 63 maintains the toggle rings 35a and 35b in an over-centered or over-expanded (or beyond parallel) configuration, whereby the handles 30a and 30b (and thus the jaw members 110 and 120) relative to each other. Is locked (FIG. 9B). Movement of handles 30a and 30b away from each other (and housing 20) unlocks and opens handles 30a and 30b, and then disengages and opens jaw members 110 and 120 for subsequent grasping or re-gripping of tissue. . In one embodiment, the handles 30a and 30b can be biased in an open configuration to facilitate handling and manipulation of forceps within the operating field. It is contemplated that various spring-like mechanisms can be utilized to accomplish this goal.

  The handle 30a also includes a locking flange 32 disposed between the distal end 34a ′ and the proximal end 30a ′, respectively, which extends into the housing 20 when the handle 30a is activated, Move against them. The locking flange 32 includes a lockout element 32 '(FIG. 14) that is dimensioned to prevent operation of the knife assembly 70 when the handle 30a is disposed in a spaced or open configuration. Actuation or movement of handle 30a toward housing 20 removes lockout element 32 and allows movement of knife assembly 70 (eg, collar 74) to separate tissue as will be described in more detail below. To.

Movable handles 30a and 30b are designed to provide a distinct lever-like mechanism advantage over conventional handle assemblies due to the unique position of toggle links 35a and 35b, which, when actuated, has a longitudinal axis Rotate along “A” to displace the working or driving collar 69. In other words, the improved mechanical advantage of actuating jaw members 110 and 120 is a unique position and combination of several cooperating elements (ie, opposing motion handles 30a, 30b, toggle links 35a, 35b, and handles Gear teeth disposed at the distal ends 34 and 37 of the members 30a, 30b, respectively, which causes the jaw members 110 and 120 to move under an ideal operating pressure of about 3 kg / cm ² to about 16 kg / cm ^2. It is envisioned to reduce the overall user power required to obtain and maintain. In other words, the combination of these elements and their position relative to each other allows the user to obtain lever-like mechanical advantages and actuate the jaw members 110 and 120 to provide a proper and effective tissue seal. It is envisioned that the user can approach jaw members 110 and 120 with less force while still generating the necessary and necessary force. Details regarding the various movements of the elements identified above are described below with respect to the operation of the forceps 10.

  As best shown in FIGS. 3A-3D, 10A-10D and 15A-15D, end effector assembly 100 includes opposing jaw members 110 and 120, which effectively tissue for sealing purposes. Cooperate to grip. End effector assembly 100 is designed as a bilateral assembly. That is, both jaw members 110 and 120 pivot relative to each other about pivot pin 185 disposed therethrough.

  A reciprocating drive sleeve 17 (see FIG. 17) is slidably disposed within the shaft 12 and is operable distally by a drive assembly 60 as will be described in more detail below. The drive sleeve 17 comprises a bifurcated distal end comprised of halves 17a and 17b, respectively, which defines a cavity 17 'between them for receiving the jaw members 110 and 120. In more detail, as best shown at 15A and 15B, jaw members 110 and 120 include proximal flanges 113 and 123 (see FIGS. 15A and 15B), respectively, through which they respectively pass. Each is provided with a defined elongated angled slot 181a and 181b. A drive pin 180 (see FIGS. 10A and 10B) attaches the jaw members 110 and 120 to the end of the rotating shaft 18 in a cavity 17 ′ located at the distal ends 17 a and 17 b of the drive sleeve 17. .

  Upon actuation of the drive assembly 60, the drive sleeve 17 reciprocates, which then places the drive pin 180 in the slots 181a and 181b and opens and closes the jaw members 110 and 120 as desired. Jaw members 110 and 120 then pivot about pivot pins 185 disposed through respective pivot holes 186a and 186b disposed in flanges 113 and 123. As can be appreciated, by compressing the handles 30a and 30b toward the housing 20, the drive sleeve 17 and drive pin 180 are pulled and the jaw members 110 and 120 around the tissue 420 grasped therebetween. By closing the proximally and pushing the sleeve 17 distally, the jaw members 110 and 120 open distally for gripping purposes.

  As best shown in FIG. 15B, jaw member 110 also includes a support base 119, which is sized to extend distally from flange 113 and support insulating plate 119 ′ thereon. is there. Insulating plate 119 'is then configured to support conductive tissue engaging surface or sealing plate 112 thereon. The sealing plate 112 can be applied to the top of the insulating plate 119 ′ and the support base 119 in any manner known in the art (snap fit, over-molding, stamping, ultrasonic welding, etc.). Intended. Along with the insulating plate 119 ′ and the conductive tissue engaging surface 112, the support base 119 is encased by the outer insulating housing 114. Outer housing 114 includes a conductive sealing surface 112 and a cavity 114a dimensioned to securely engage support base 119 and insulating plate 119 '. This can be achieved by stamping, overmolding, overmolding of stamped conductive sealing plates, and / or overmolding of metal injection molded seal plates. All of these manufacturing techniques produce a jaw member 110 having a conductive surface 112 that is substantially surrounded by an insulating substrate 114.

  For example, as shown in FIG. 15B, the conductive sealing plate 112 includes a fitting plate 112 a that surrounds the periphery of the sealing plate 112. The flange 112a is designed to matingly engage the inner lip 117 of the outer insulator 114. A lead 325a (see FIG. 16) extending from the circuit board 170 or generator 500 ends in the outer insulator 114 and is designed to be electromechanically connected to the sealing plate 112 by a crimp-like connection 326a. . For example, the insulator 119 ', the conductive sealing surface 112 and the outer non-conductive jaw housing 114 preferably have many of the known undesirable effects associated with tissue sealing (eg, flashover, thermal diffusion and stray current dissipation). Dimension to limit and / or reduce.

  It is envisioned that the conductive sealing surface 112 may also include an outer peripheral edge having a predetermined radius such that the outer housing 114 fits the conductive sealing surface 112 along an adjacent edge of the sealing surface 112 at a substantially tangential location. Is done. At the interface, the conductive surface 112 is raised relative to the outer housing 114. These and other envisioned embodiments are described by Johnson et al., “ELECTROSURGICAL INSTRUMENT WHICH REDUCES COLLATETAL DAMAGAGE TO ADJACENT TISSUE”, co-pending application number PCT / US01 / 114on et al. Co-pending application number PCT / US01 / 11411 entitled “INSTRUMENT WHICH IS DESIGNED TO REDUCE THE INCIDENCE OF FLASHOVER”, the contents of both of which are incorporated herein by reference in their entirety. Be considered).

  When assembled, the conductive surface or sealing plate 112 and the outer housing 114 form a longitudinally oriented slot 115a defined therethrough for reciprocal movement of the knife blade 190. A knife channel 115a cooperates with a corresponding knife channel 115b defined in the jaw member 120 to facilitate longitudinal extension of the knife blade 190 along the preferred cutting plane and along the tissue seal that is formed. It is envisaged to separate the tissue effectively and accurately. As best shown in FIGS. 8A, 8B, 15A and 15B, the knife channel 115 extends through the center of each of the jaw members 110 and 120 so that the blade 190 from the knife assembly 70 can be Tissue grasped between jaw members 110 and 120 may be cut when 120 is in the closed position. As described above in more detail and with respect to the handle assembly 30, the handle 30 a prevents operation of the knife assembly 70 when the handle 30 a is open, and thus accidental or premature operation of the blade 190 through tissue. A lockout flange is provided.

  As described above and shown in FIGS. 15A and 15B, knife channel 115 is formed when jaw members 110 and 120 are closed. In other words, the knife channel 115 comprises two knife channel halves (a knife channel half 115a disposed on the sealing plate 112 of the jaw member 110 and a knife channel 115b disposed on the sealing plate 122 of the jaw member 120). It is envisioned that the knife channel 115 can be configured as a straight slot without curvature, which then moves the knife 190 through the tissue in a substantially straight manner. Alternatively, the knife channel 115 can be dimensioned to include some degree of curvature so that the knife 190 moves through the tissue in a curved manner. Insulating plate 119 ′ also forms part of knife channel 115 and includes a channel 115a ′ defined therein, which extends along insulating plate 119 ′ and is in vertical registration with knife channel half 115a. Align to facilitate translation of the distal end 192 of the knife 190 therethrough.

  The conductive sealing surface 112 of the jaw member 110 also includes a monopolar extension 112a, which allows the surgeon when placed in a monopolar mode of operation, as will be described in more detail below with respect to the operation of the forceps 10. Can selectively fix the tissue. The monopolar extension 112a is preferably integrally coupled with the conductive sealing plate 112, but may also be selectively extendable depending on the particular purpose. The shape and dimensions of the monopolar extension 112a may be sized to match the overall contour of the curved contour of the jaw member 110 or jaw housing 114. The edge of the monopolar extension 112a may be dimensioned with a radius (eg, a smooth curve and a transition point) that is specifically dimensioned to reduce the current density along that edge. The thickness of the monopolar extension 112a is preferably in the range of about 0.010 inch ± 0.005 inch The width of the monopolar extension 112a is preferably about 0.084 inch ± 0.010. Inches, allowing jaw members to make intestinal incisions that can be passed through to mechanically expand tissue.The length is preferably about 0.040 inches ± 0.010 inches. US patent application Ser. No. 10 / 970,307, entitled “BIPOLAR FORCEPS HAVING MONOPOLAR EXTENSION”, and “BIPOLAR F US application Ser. No. 10 / 988,950, entitled “RCEPS HAVING MONOPOLAR EXTENSION” discloses various embodiments of monopolar extensions that may be configured for use with the forceps 10 of the present disclosure. The entire contents of both are hereby incorporated by reference herein.

  Jaw member 120 includes similar elements to jaw member 110, such as jaw housing 124 enclosing support member 129, insulating plate 129 'and conductive sealing surface 122. Similarly, the conductive surface 122 and insulator plate 129 ′ comprise respective longitudinally oriented knife channels 115 a and 115 a ′ defined therethrough for reciprocal movement of the knife blade 190 when assembled. . As described above, when the jaw members 110 and 120 are closed around the tissue, the knife channels 115a and 115b form a complete knife channel 115, and in a distal fashion, the longitudinal extension of the knife 190 is attached to the tissue seal. The tissue can be cut along. It is also envisioned that the knife channel 115 can be fully positioned on one of the two jaw members (eg, jaw member 120) depending on the particular purpose. It is also envisioned that jaw member 120 may be assembled in a manner similar to that described above with respect to jaw member 110.

  As best shown in FIG. 15A, jaw member 120 includes a series of stop members 90 disposed on the inwardly facing surface of conductive sealing surface 122 to facilitate tissue grasping and manipulation, and tissue sealing. And during cutting, a gap “G” (FIG. 10B) is defined between opposing jaw members 110 and 120. It is envisioned that a series of stop members 90 may be used on one or both of jaw members 110 and 120 depending on the particular purpose or to achieve the desired result. A detailed discussion of these and other possible stop members 90, as well as various manufacturing and assembly processes for attaching and / or affixing the stop member 90 to the conductive sealing surfaces 112, 122, can be found in Dycus et al. Copending co-pending US application number PCT / US01 / 11413, entitled “VESSEL SEALER AND DIVIDER WITH NON-CONDUCTIVE STOP MEMBERS”, which is hereby incorporated by reference in its entirety. Incorporated by reference).

  The jaw member 120 is connected to a second electrical lead 325b extending from the circuit board 170 or the generator 500 (see FIG. 16), which contacts the outer insulator 124, And it is designed to be electromechanically connected to the sealing plate 122 by the crimp-like connecting portion 326b. As will be described in more detail below, leads 325a and 325b are used by the user during surgery to provide either bipolar or unipolar electrosurgical energy to jaw members 110 and 120 as required. Can be selectively supplied.

  Jaw members 110 and 120 are electrically isolated from each other so that electrosurgical energy can be efficiently transmitted through the tissue to form a tissue seal. For example, and as best illustrated in FIGS. 15A and 15B, each jaw member (eg, 110) comprises a uniquely designed electrosurgical cable path disposed through the jaw member, the path being Electrosurgical energy is transmitted to the conductive sealing surface 112. The cable lead 325a is held loosely but firmly along the cable path to allow rotation of the jaw members 110 and 120. As can be appreciated, this isolates the conductive sealing surface 112 from the end effector assembly 100, jaw member 120 and the remaining working parts of the shaft 12. The two potentials are separated from each other by an insulating sheathing surrounding the cable leads 325a and 325b.

  As described above, jaw members 110 and 120 are engaged to the end of rotating shaft 18 by pivot pin 185 so that rotation of rotating assembly 80 is correspondingly (sleeve 17 and knife drive). The shaft 18 is rotated (along the rod 71) and then the end effector assembly 100 is rotated (see FIG. 12). More specifically, the distal end of rotating shaft 18 is bifurcated to include ends 18a and 18b that define a channel therein for receiving jaw members 110 and 120 therein. The pivot pin 185 secures the jaw members 110 and 120 to the ends 18a and 18b through openings 186a and 186b defined through the jaw members 110 and 120, respectively. As best seen in FIGS. 13 and 17, the rotating shaft 18 is sized to slidably receive the knife drive rod 71, knife 190 and knife guide 197 therein. The rotating shaft 18 is then rotationally received within the drive sleeve 17 which is connected to the drive assembly 60 as described above. Details regarding the knife assembly are described in more detail with respect to FIGS. 5A, 5B, 6A, 6B, 7, 8A and 8B.

  The rotating shaft 18 and the drive shaft 17 are secured to the rotating assembly 80 by two rotating tabs that are engaged through slots 18c in the rotating shaft 18, so that the rotation of the rotating member is corresponding. Then, the rotating shaft 18 is rotated. It is envisioned that the drive shaft and rotating shaft can be secured to the rotating assembly in other ways known in the art (snap fit, interference fit, etc.).

  FIGS. 13 and 14 show details of the features of the forceps 10 and its components, namely the housing 20, drive assembly 60, rotation assembly 80, knife assembly 70 and handle assembly 30. More specifically, FIG. 13 shows the entire forceps 10 deployed with the assembly identified above and its components, and FIG. 14 shows the deployment of the housing 20 and components contained therein. The figure is shown.

  The housing 20 includes housing valves 20a and 20b that form the housing 20 when mated. As can be appreciated, once formed, the housing 20 forms an internal cavity 25 that allows the user to selectively select tissue in a simple, effective and efficient manner. It houses the various assemblies identified above that allow it to be manipulated, gripped, sealed and cut. Each half of the housing (eg, half 20b) includes a series of mechanical interface components (eg, 205) that are aligned and / or mated with a corresponding series of mechanical interfaces (not shown). To align the two housing halves 20a and 20b around the internal components and assemblies. Once assembled, the housing halves 20a and 20b can then be ultrasonically welded or otherwise engaged to mate to secure the housing halves 20a and 20b.

As described above, the handle assembly 30 comprises two movable handles 30a and 30b, each of which cooperates with toggle links 35a and 35b, respectively, to actuate or drive the drive assembly 60. The collar 69 is activated. The drive collar then opens and closes the jaw members 110 and 120 by reciprocating the drive sleeve 17 as described above. Movable handles 30a and 30b are designed to provide a distinct lever-like mechanical advantage over conventional handle assemblies due to the unique position of toggle links 35a and 35b. Toggle links 35a and 35b, when actuated, rotate along longitudinal axis “A” to move actuating collar 69. More specifically, and as described above, the enhanced lever-like mechanical advantage for actuating jaw members 110 and 120 is due to the various internal cooperation at the distal ends of handles 30a and 30b. It is envisioned that it is obtained by the unique position and combination of the elements (eg, toggle links 35a and 35b, gear teeth 34a and 34b). Handles 30a and 30b reduce the overall user force required to obtain and maintain jaw members under ideal operating pressures of about 3 kg / cm ² to about 16 kg / cm ^2. Collaborate with.

  As described above, movement of the handles 30a and 30b from an open or spaced configuration to a closed position toward the housing 20 applies force to the actuation collar 69 in a proximal direction against the spring 63; The drive sleeve 17 is then translated proximally to close the jaw members 110 and 120. Further, when the handles 30a and 30b are rotated to the closed position, the handles 30a and 30b apply a force to the toggle couplings 35a and 35b to extend longitudinally beyond the direction parallel to the longitudinal axis “A”. When rotating along the axial axis “A” so that the handles 30a and 30b are released from the closed position, the force of the spring 63 is excessively extended on the toggle connections 35a and 35b, And maintaining an over-concentrated (ie, past parallel) arrangement, thereby locking the handles 30a and 30b (and thus the jaw members 110 and 120) with respect to each other (see FIGS. 9A and 9B). about). In order to unlock the jaw members 110 and 120, the handles 30a and 30b are moved away from each other (and from the housing 20) so that the toggle connections 35a and 35b are at least parallel with respect to the longitudinal axis “A”. Returning in the direction, the handles 30a and 30b are unlocked and opened, and then the jaw members 110 and 120 are opened for subsequent grasping or re-gripping of the tissue. Once the handles 30a and 30b are opened beyond parallel, the force of the spring 63 facilitates opening of the handles 30a and 30b and the jaw members 110 and 120.

  As described above, the handle 30a also includes a locking flange 32 that is dimensioned to prevent operation of the knife assembly 70 when the handle 30a is disposed in a spaced or open configuration. Actuation or movement of the handle 30a toward the housing 20 releases the lockout element 32 and allows the knife assembly 70 to move to separate tissue, as will be described in more detail below.

  As best seen in FIG. 14, the drive assembly includes a drive collar 69, a spring 63, and a locking sleeve 62. Toggle couplings 35a and 35b operably connect drive collar 69 to handles 30a and 30b, respectively. The locking sleeve 62 is dimensioned to fit through an opening 67 defined through the drive collar 69, and the spring 63 is dimensioned to fit over the locking sleeve 62. The spring 63 is then biased to and against the locking sleeve 62 between the drive collar 69 and the pair of locking bolts 62a and 62b. When the handles 30a and 30b are actuated, the toggle couplings 35a and 35b apply a force in the proximal direction to the drive collar 69 and press the spring 63 against the locking bolts 62a and 62b.

  As best seen in FIGS. 9A and 9B, the locking sleeve 62 and the sleeve 17 are gripped or welded together during assembly. The locking sleeve 62 includes a distal collar 62 'that abuts the drive collar 69 to ensure axial translation of the drive collar 69 when the handles 30a and 30b are actuated. The locking sleeve 62 and sleeve 17 are also dimensioned to reciprocate through the locking nuts 62a and 62b while the handles 30a and 30b are actuated, which means that the spring 63 is in relation to the locking nuts 62a and 62b. To facilitate locking the forceps 10 in a closed orientation and opening the handles 30a and 30b after the forceps 10 is actuated, as described above. To make it easier.

  FIG. 14 also shows a rotating assembly 80 comprising two C-shaped rotating halves 81 a and 81 b that form a generally circular rotating member 81 when assembled about the shaft 17. More specifically, each rotating half (e.g., 81b) includes a series of mechanical interfaces 83 that mate with a corresponding series of mechanical interfaces (not shown) in half 81a. To form the rotating member 81. Half 81b also includes tabs or protrusions (not shown) that cooperate with corresponding tabs or protrusions (not shown) disposed on half 81a to drive shaft 17 and respectively, Engage with the slots 17c and 18c on the rotating shaft 18 to fit. As can be appreciated, this allows selective rotation of the end effector assembly 100 about the axis “A” by manipulating the rotating member 80 in the direction of arrow “R” (FIG. 1A). And 12).

  As described above, jaw members 110 and 120 can be opened and closed and rotated to manipulate tissue until sealing is desired. This allows the user to position and reposition the forceps 10 prior to activation and sealing. The unique supply path of cable leads 325a and 325b, which extends through the rotating assembly 80 and along the shaft 18 to the jaw members 110 and 120, allows the user to entangle the cable leads 325a and 325b. It is also envisioned that the end effector assembly 100 can be rotated approximately 170 ° in both clockwise and counterclockwise directions without undue strain on the cable leads 325a and 325b.

  As best shown in FIGS. 5A, 5B, 6A, 6B, 7, 11A, 11B and 14, the knife assembly 70 is placed over the housing 20 and the knife bar 71 is selectively translated, then , Configured to translate knife 190 through the tissue. More specifically, the knife assembly 70 comprises a finger actuator 76 to which an elongated support base 72 is secured, which is selected parallel to the longitudinal axis “A”. Can be moved. The elongate support substrate 72 includes a proximal end configured as a gear rack with a series of gear teeth 72a depending downwardly. The gear teeth 72 a are configured to mesh with corresponding pinion gears 77 installed for rotation on the housing 20. The pinion gear 77 also meshes with a second gear track 75 having a plurality of gear teeth 75a disposed around a collar 74 that is slidably translatable around the sleeve 17. As best shown in FIGS. 9A, 9B and 11A, pin 78 attaches collar 74 to proximal end 71b of knife bar 71 through slot 17d, defined through sleeve 17. Proximal translation of finger actuator 76 in direction “F” causes pinion gear 77 to rotate clockwise and then forces second gear track 75a distally in direction “H”. Add (see Figure 7). The spring 79 biases the collar 74 against the housing 20 and automatically returns the knife assembly 70 to its pre-actuated position after the finger actuator 76 is released.

  As described above, knife assembly 70 is prevented from operating when jaw members 110 and 120 are opened by flange 32 disposed on handle 30a. The flange 32 is positioned to prevent distal actuation of the collar 74 when the handles 30a and 30b are opened. When the handles 30a and 30b are moved to the closed position, the flange 32 allows the collar 74 to translate in the distal direction and is positioned to actuate the knife bar 71.

  The operational characteristics and relative movement of the actuating components within the forceps 10 are indicated by shadowing in the various drawings. When the handles 30a and 30b are tightened, the drive collar 69 is moved proximally due to the mechanical advantage of the toggle couplings 35a and 35b on the line, and then the spring 63 is moved against the locking nuts 62a and 62b. Squeeze. As a result, the drive collar 69 reciprocates the locking sleeve 62 in the proximal direction and then reciprocates the drive sleeve 17 in the proximal direction to close the jaw members 110 and 120. Once the jaw members 110 and 120 are closed around the tissue, the user is selective to the conductive sealing plate for either unipolar or bipolar actuation to treat the tissue. Can be energized.

  As best shown in FIGS. 6A, 14 and 16, the forceps 10 includes two switches 250 and 260 placed inside or on the housing 20 so that the user can selectively activate the forceps 10. Selectively transmit bipolar energy to jaw members 110 and 120 or select unipolar energy for jaw members 110 and 120 or a single jaw member (eg, jaw member 110) Allows to communicate. For purposes herein, either switch (eg, switch 250) may be configured for unipolar operation, and the other switch (eg, switch 260) may be bipolar. It is envisioned that it can be configured for operation. In addition, the switches 250 and 260 may include indicia or other identification elements (eg, raised ridges, scallops, different shapes, etc.) to distinguish the two switches 250 and 260 from each other. These can prove to be particularly useful during wet operating conditions.

  In one particularly useful embodiment, and as best shown in FIG. 6A, the switches 250 and 260 are on the opposite side of the longitudinal axis “A” and on the opposite side of the knife assembly 70 from the housing 20. Installed inside. As can be appreciated, knife assembly 70 (and its actuation), and switches 250 and 260 (and its actuation) are conveniently adapted to facilitate actuation / activation by the user during an operating state. Positioned. For example, the user may use the same to activate both switches 250 and 260 to treat the tissue and to activate the knife assembly 70 to cut the tissue once the tissue has been treated. It is contemplated that a finger may be utilized.

  As shown in FIGS. 6A and 16, the cable 310 is fed through the housing 20 b on one side of the drive assembly 60 and is electromechanically connected to the printed circuit board 172 of the switch assembly 170. More specifically, the cable 310 is internally connected to a plurality of lead wires 311a-311f fixed to a series of corresponding contact portions 176a-176f extending from the printed circuit board 172 by a crimp-like connection portion 174, or Finally, it is divided into other conductive leads that are connected to the jaw members. Other electromechanical connections commonly known to those skilled in the art (eg, IDC connections, soldering, etc.) are also envisioned. The various leads 311a-311f are configured to transmit different potentials or control signals to the printed circuit board 172, which in combination with the generator 500 is used to provide electrical energy to the jaw members 110 and 120. It is envisaged to regulate, monitor and control. As described above with respect to the description of the jaw members, the electrical leads 325a and 325b extend along the shaft 18 through the rotating member 80 and are ultimately connected to the jaw members 110 and 120.

FIG. 23 shows a layout of a control circuit 510 for use with the forceps 10 disclosed herein. As described above, the forceps 10 is configured to operate in two independent modes of operation (bipolar mode and unipolar mode) for different surgical procedures. When one of the switches 250 (S1 in FIGS. 19 and 23) or 260 (S2 in FIGS. 19 and 23) of the switch assembly 170 is pressed, a contact (not shown) on the switches 250 and 260 is activated, An appropriate electrical potential is carried to jaw members 110 and 120 through leads 325a and / or 325b. For example, when the switch 250 is pressed (LigaSure ^TM operation), the circuit board 172 sends a signal to the generator 500 to configure the forceps 10 as a bipolar forceps, and the lead wire 325a is connected to the jaw member 110. A first potential is carried and lead 325b carries a second potential to jaw member 120. In this manner, jaw members 110 and 120, when activated, conduct bipolar energy through the tissue to create a tissue seal. FIG. 23 shows an example of a contemplated electrical circuit that can be utilized to achieve this goal.

  When switch 260 (monopolar actuation) is pressed, circuit board 172 configures the forceps as a monopolar forceps, and lead 325a carries a first potential to jaw member 110 to transfer tissue to the monopolar. In a manner, coagulate or otherwise treat. As described above, jaw member 110 includes a monopolar extension that facilitates monopolar treatment of various tissue types (eg, avascular tissue structures) and / or a narrow tissue surface. Allows rapid resection. The operation of the monopolar extension can be controlled by an operating circuit. This actuation circuit allows the user to selectively apply monopolar or bipolar energy as needed during surgery. One anticipated actuation circuit is described in US patent application Ser. No. 10 / 970,307 (invention title “BIPOLAR FORCEPS HAVING MONOPOLLAR EXTENSION”) and US patent application Ser. No. 10 / 988,950 (invention title “BIPOLAR FORCEPS”). HAVING MONOPOLAR EXTENSION ”, the entire contents of both of these US patent applications are incorporated herein by reference.

  Alternatively, as best shown in FIG. 23, when switch 260 is depressed during monopolar mode, the generator (or printed circuit board) may depend on the particular purpose or desired surgical procedure. Depending on (eg, so-called “solidified paint”), both leads 325a and 325b may carry the same potential to jaw members 110 and 120. As can be appreciated, in the unipolar mode, the return pad is naturally placed in contact with the patient to serve as a return path (not shown) for electrical energy. This return pad, in this example, connects generator 500 directly to or through this return pad control mechanism (not shown). This mechanism may be configured to monitor certain parameters of the return pad. Various anticipated control systems are described in commonly owned U.S. Application No. 10 / 918,984 (invention name "MULTIFLE RF RETURN CABLE PAD CONTACT DETECTION SYSTEM"), U.S. Patent Application No. 09 / 310,059 (invention title " ELECTROSURGICAL RETURN ELECTRODE MONITOR (currently US Pat. No. 6,258,085)), US Provisional Patent Application No. 60 / 616,970 (Invention Name “DEVICE FOR DETECTING HEATING UNDER A PATIENT RETURN Patent”) Application No. 60 / 666,798 (name of invention “TEMPERATURE REGULATING PATIENT RE URN ELECTRODE AND RETURN ELECTRODE MONITORING SYSTEM "is disclosed in, all the entire contents of these US applications are herein incorporated by reference.

  In bipolar mode, circuit 510 (shown schematically in FIG. 23) electrically routes energy to two jaw members 110 and 120. More specifically, when switch 250 is depressed, isolated circuit 520 of circuit 510 recognizes a decrease in resistance across the circuit, which is recognized by the generator to reduce electrosurgical energy. A first potential is applied to the jaw member 110 and a second potential is applied to the jaw member 120. Switch 520 acts as an isolated control circuit and is protected from higher current loops (which supply electrical energy to jaw members 110 and 120) by circuitry within the generator. This reduces the chance of electrical failure of the switch 260 due to the high current load during operation.

  As best shown in FIG. 14, the handle 30a also includes a switch lockout mechanism 255, which switches 250 and 260 when the jaw members 110 and 120 are placed in an open configuration. May be configured to prevent actuation of one or both of the two. More specifically, the lockout mechanism 255 extends from the handle 30a toward the housing 20 and is selectively movable with the handle 30a from a first position to a second position closer to the housing 20. It is. In this first position, lockout mechanism 255 prevents one or both of switches 250 and 260 from being pressed into contact with circuit board 172, and in this second position, lockout mechanism 255. Is positioned to allow actuation of switch 250 (or switches 250 and 260). Lockout mechanism 255 may be configured as a purely mechanical lockout that physically prevents movement of one or both of switches 250 and / or 260, but with a safety switch to enable operation. It may be configured as an electromechanical lockout with mechanical elements to be actuated. Further, the switch lockout mechanism 255 can be configured such that one or both switches can be independently and exclusively operable, i.e., only one switch can be activated at a time.

  For example, the flex circuit 170 may include a safety switch 171 that is activated when the lockout mechanism 255 is physically engaged with the safety switch 171 to close the circuit, allowing electrosurgical operation. To. In other words, safety switch 171 bends or physically engages (ie, by movement of lockout mechanism 255 when handles 30a and 30b are closed) to close the electrical path and Allows surgical operation. Further details regarding various embodiments of the safety switch are described below with respect to FIGS. 18-21D. It is also anticipated that a purely electrical safety switch (see FIG. 23) may be provided, which is a purely electrical safety switch that satisfies the electrical condition (eg, handle 30a (or handle 30a and 30b) Enable operation based on optical alignment of top points, magnetic or electromagnetic alignment (or misalignment) to close switches (proximity sensors, scanners, mercury (and so on) switches, etc.)) To do. Here too, the safety switch 171 is such that one or both switches 250 and / or 260 can be independently and exclusively operable, i.e. only one switch can be activated at a time. Can be configured.

  As can be appreciated, placing switches 250 and 260 on housing 20 is advantageous during operating conditions. This is because this positioning reduces the amount of electrical cable in the operating room and eliminates the possibility of wrong instrument or wrong switch actuation due to "line-of-sight" actuation during the surgical procedure. . An automatic safety circuit or an electromechanical safety lock or mechanical safety lock (not shown) can be used, which does not deactivate the safety circuit or any other safety mechanism (ie with independent and exclusive operation). ), Preventing switches 250 and 260 from energizing jaw members 110 and 120 in different modes (ie, bipolar or monopolar mode). For example, it may be desirable to configure switch assembly 70 so that it must be reset before switching between electrical modes. The reset can be accomplished by re-gripping the tissue, reopening the handles 30a and 30b, resetting the switch or reset lever, or other manners conventional in the art.

  As can be appreciated, various switch algorithms (see FIG. 23) enable both bipolar modes for vascular sealing and monopolar modes for further tissue treatment (eg, coagulation, ablation, etc.). Can be used to activate. The safety mechanism or lockout mechanism is used as part of an algorithm to switch one electrical mode to another, either electrically, mechanically or electromechanically. It is also expected to “lock out” during mode operation. Furthermore, it is contemplated that a toggle switch (such as) can be used to activate one mode at a time for safety reasons.

  When assembled (and when handles 30a 'and 30b and jaws 110 and 120 are opened), safety switch 171 is secured to the inner wall or ledge 173 of housing 20b, as shown in FIG. 22A. Upon movement of the handle 30a toward the housing 20b, the safety lockout 255 moves inwardly relative to the housing 20b toward the safety switch 171 as shown in FIG. 22B. As handles 30a and 30b move toward the closed position (as described in detail above), safety lockout 255 engages safety circuit 171 ′ (S3 in FIGS. 19 and 23). Complete the circuit to allow selective actuation of the forceps 10 (see also FIG. 23).

  As best shown in FIGS. 14 and 23, the switching assembly may include an intensity controller 150 that is electromechanically connected to the circuit board 172 and is used during operating conditions. Configured to allow a person to selectively adjust the intensity of electrosurgical energy. It is anticipated that the intensity controller 150 will be specifically configured to adjust the intensity controller when the forceps are configured in monopolar mode. In one particularly useful embodiment, the strength controller 150 is elongated and includes a contact 154 that extends laterally from the strength controller and is electrically coupled to the circuit board 172 via the housing 20. To interface. The actuation knob 151 extends laterally from the opposite side of the strength controller 150 and is dimensioned to project from the face of the housing 20 when assembled (FIGS. 5A, 5B, 6A, and 6B). checking). In one particularly useful embodiment, the intensity controller 150 is configured to slide along the housing 20 and adjust the intensity level as desired.

  It is anticipated that the intensity controller 150 may be configured to slide along the housing 20 in a discontinuous or continuous manner depending on the particular purpose. In addition, various types of indicia 155 and / or tactile feedback elements (not shown) (eg, numbers, graphical indicia, mechanical interfaces, etc.) may be utilized to indicate position and / or intensity level of electrical energy. obtain. The user can configure the initial strength level of the generator 500 (see FIG. 16), and the strength controller 150 of the forceps 10 is preset by a certain percentage by moving the knob 151. It is also anticipated that it can be utilized to increase or decrease levels.

  Intensity controller 150 functions as a slide potentiometer that slides along a flexible circuit board or printed circuit board (this circuit may be configured to function as a voltage divider network, or “VDN”). Can be configured. For example, the intensity controller 150 can be configured to have a first position, a second position, and a plurality of intermediate positions. In this first position, the knob 151 is placed in the most proximal position (eg, closest to the user), which corresponds to a relatively low intensity setting. In this second position, the knob 151 is positioned at the most distal position (eg, furthest from the user), which corresponds to a relatively high intensity setting. In these multiple intermediate positions, the knob 151 is arranged at various positions between the first position and the second position, and these positions correspond to various intermediate intensity settings. As can be appreciated, the intensity setting from the proximal end to the distal end can be reversed, for example, from “high” to “low”. One embodiment of the intensity controller 150 is disclosed in commonly-owned US patent application Ser. No. 11 / 337,990, entitled “ELECTROSURGICAL PENCIL WITH ADVANCED ES CONTROLS”. Incorporated herein by reference.

  As illustrated in FIG. 14, as described above, the knob 151 may be dimensioned to rest along a guide channel 157 disposed within the housing 20a. This knob has a series of discrete or detented positions (eg 5) that define a series of positions, allowing easy selection of output intensity from low to high intensity settings To do. These series of cooperating discrete or de-locked positions also provide the surgeon with some tactile feedback. Thus, in use, as the strength controller 150 slides distally and proximally, the mechanical interface 158 located at the top contact 154 selectively engages a series of corresponding detents (not shown). The intensity level is set and the user is provided with haptic feedback regarding when the intensity controller 150 is set to the desired intensity setting. Alternatively, auditory feedback (eg, “click sound”) is provided from the intensity controller 150, from the electrosurgical energy source 500 (eg, “sound”), and / or an auxiliary sound generation device (eg, a buzzer (not shown)). ))).

  The intensity controller 150 is also configured to adjust power parameters (eg, voltage, power and / or current intensity) and / or the shape of the power versus impedance curve to affect the perceived output intensity. And can be adapted. For example, the greater the strength controller 150 moves in the distal direction, the greater the level of power parameter transmitted to the jaw members 110 and 120 (or simply jaw member 110 when placed in a monopolar configuration). . When the forceps are placed in monopolar mode, the strength of the current can range from about 60 mA to about 240 mA when the tissue has an impedance of about 2 kΩ. The 60 mA intensity level may be very light and / or provide minimal cutting / ablation / hemostatic effects. The 240 mA intensity level provides a very aggressive cutting / ablation / hemostatic effect.

  The intensity setting is typically preset and selected from a look-up table based on the desired surgical effect, surgical characteristics, and / or surgical selection. This selection may be made automatically or manually by the user.

  It is anticipated that if the forceps 10 changes from one mode to another, the intensity controller 150 may be configured to have to be reset. For example, the knob 151 is repositioned at the proximal end of the guide channel 157, thereby resetting the intensity level to a preset configuration. After being reset, the intensity controller 150 is desirable for the selected mode and / or can be adjusted as needed to the required intensity level.

  It is anticipated and contemplated that circuit board 172 or generator 500 may also include an algorithm that stores the last intensity level setting for each mode. In this manner, the intensity controller 150 does not need to be reset to the last operating value when a particular mode is selected again.

  The present disclosure also relates to a method for treating tissue using electrosurgical energy from an electrosurgical generator 500, the method providing an endoscopic forceps 10 comprising a housing 20 with a shaft 12 attached thereto. Is included. The shaft 12 includes a first jaw member 110 and a second jaw member 120 that are each attached near the distal end of the shaft 12. An actuator or handle assembly 30 is provided for moving the jaw members 110 and 120 relative to each other from a first position to a second position. In this first position, jaw members 110 and 120 are spaced apart from each other, and in this second position, jaw members 110 and 120 are between these jaw members. Collaborate for grasping tissue. A switch assembly 170 is provided in the housing 20 that allows the user to selectively energize the jaw members 110 and 120 and treat tissue in a monopolar or bipolar mode. .

  As can be expected and as described above, the switch assembly 170 includes switches 250 and 260, a printed circuit board 172, and connectors 176a-176d. Intensity controller 150 may also include a switch assembly 170 for adjusting the intensity level of electrosurgical energy when placed in either mode. In this particular method, the method further includes the steps of: grasping tissue between the jaw members 110 and 120; selectively actuating the jaw members 110 and 120 to connect the jaw members 110 and 120 to each other. Treating interstitial tissue in a bipolar or monopolar manner; and selectively adjusting the intensity of electrosurgical energy by controlling the intensity controller 150.

  Other steps of the method may include the following steps: providing a knife assembly 70 configured for selective actuation of the knife, and selectively actuating the knife assembly 70 to provide a knife 190. And dividing the tissue after the tissue treatment. Still other steps may include: adjusting the intensity of electrosurgical energy as needed during operating conditions; unlocking the knife assembly 70 prior to actuation, or handle 30a and Actuating 30b from the first and second positions and simultaneously unlocking the knife assembly 70;

  As best shown in FIG. 17, the distal end 71a of the elongated knife bar 71 of the knife assembly 70 is attached to the knife 190 at its proximal end. It is envisioned that the knife 190 can be attached to the knife bar 71 in any manner known in the art (eg, snap fit, friction fit, pin, weld, adhesive, etc.). In the particular embodiment shown in FIG. 17, a clamp collar 197 is used to hold the knife 190 firmly engaged with the knife bar 71.

  Switches 250 and 260 are typically push-button shaped and are ergonomically sized to be installed in respective opening portions 250 'and 260' of housing 20 (once assembled). Switches 250 and 260 are expected to allow the user to selectively activate forceps 10 for tissue surgical procedures. More specifically, when either switch 250 or 260 is depressed, electrosurgical energy is transmitted to the respective jaw members 110 and 120 through leads 325a and / or 325b.

  Also here, as described above, the safety switch 255 (or circuitry or algorithm (not shown)) may provide tissue as long as the jaw members 110 and 120 are not closed and / or between the jaw members 110 and 120. Unless held, one or both of switches 250 and 260 can be used so that they cannot be activated. In the latter example, a sensor (not shown) may be used to determine whether tissue is grasped between the jaw members. In addition, other sensor mechanisms may be used that determine pre-surgical conditions, conditions that coincide with (ie, during surgery), and / or conditions after surgery. These sensor mechanisms are also utilized in conjunction with a closed loop feedback system coupled to an electrosurgical generator to provide electrosurgical based on one or more pre-surgical conditions, contemporaneous conditions or post-surgical conditions. Can adjust energy. Various sensor mechanisms and feedback systems are disclosed in co-pending US patent application Ser. No. 10 / 427,832, entitled “METHOD AND SYSTEM FOR CONTROL OUTPUT OF RF MEDICAL GENERATOR”, the entire contents of which are incorporated herein by reference. Are incorporated herein by reference.

  Returning to FIG. 14, FIG. 14 shows an exploded view of the housing 20, rotating assembly 80, drive assembly 70, handle assembly 30 and switch assembly 170, all of these various components including the shaft 12 and end. Together with the effector assembly 100, it is expected to be assembled during the manufacturing process to form a partially and / or fully disposable forceps 10. For example, as described above, the shaft 12 and / or the end effector assembly 100 can be disposable and thus can be selectively / removably engageable with the housing 20 and the rotating assembly 80 and partially disposable. The forceps 10 may be formed and / or the entire forceps 10 may be disposable after use.

  It is anticipated that the opposing jaw members 110 and 120 can be rotated and unlocked partially without unlocking the knife assembly 70. This allows the user to grasp and manipulate the tissue without premature activation of the knife 190, as can be appreciated. As described below, only the position in which handles 30a and 30b are substantially fully closed unlocks knife assembly 70 for operation.

Once the desired position for the sealing site is determined and the jaw members 110 and 120 are properly positioned, the handles 30a and 30b are squeezed to activate the drive assembly 60 and the jaw members 110 and 120. Can be closed around the tissue. As described above, when the handles 30a and 30b are fully closed around the tissue, the toggle links 35a and 35b rotate excessively parallel to the longitudinal axis “A”, resulting in the handles 30a and 30b being By opening slightly, the spring 63 is biased to lock the handles 30a and 30b relative to each other. As can be appreciated, when the handles 30a and 30b lock relative to each other, the jaw members 110 and 120 are then locked and secured around the tissue. The pressure range at this time is within a range of about 3 kg / cm ² to about 16 kg / cm ² , and preferably a pressure range of about 7 kg / cm ² to about 13 kg / cm ² . The forceps 10 is now ready to selectively apply electrosurgical energy and then (if desired) separate tissue.

Mechanical advantage obtained by positioning toggle links 35a and 35b relative to longitudinal axis "A" and machine obtained by configuring distal ends 34a 'and 34b' as gear teeth that mesh internally. The combination with the physical benefits is expected to facilitate and ensure a consistent, uniform, accurate closure force around the tissue within the desired working pressure range. This desired working pressure range is within about 3 kg / cm < ² > to about 16 kg / cm < ² >, and in one particularly useful embodiment is about 7 kg / cm < ² > to about 13 kg / cm < ² >. By controlling the intensity, frequency and duration of the electrosurgical energy applied to the tissue, the user can activate cauterization, coagulation / drying, sealing, and / or by actuating either or both of switches 250 and 260. Either simply reducing or slowing the bleeding can be done.

  In one or more particularly useful embodiments, the respective conductive seal surfaces 112, 122 of the jaw members 110, 120 are relatively flat, avoiding current concentrations at sharp edges, and high points. Avoid arcing between. Furthermore, due to the reaction force of the tissue when engaged, jaw members 110 and 120 are preferably manufactured to resist bending. For example, jaw members 110 and 120 may be tapered along their width, since the thicker proximal portion of jaw members 110 and 120 resists bending due to tissue reaction forces. It is advantageous.

  As described above, at least one jaw member (eg, 120) may include one or more stop members 90 that limit the movement of two opposing jaw members 110 and 120 relative to each other. To do. The stop member 90 may be dimensioned to extend a predetermined distance from the sealing surface 122 according to certain material properties (eg, compressive strength, thermal expansion, etc.), and consistently accurate gap distance “G” during sealing. "give. The gap distance between opposing sealing surfaces 112 and 122 ranges from about 0.001 inches to about 0.006 inches during sealing, and in one particularly useful embodiment, about 0.002 inches. Between inches and about 0.003 inches. The non-conductive stop member 90 is deposited on the jaw members 110 and 120, whether molded into the jaw members 110 and 120 (eg, overmolding, injection molding, etc.) or stamped into the jaw members 110 and 120. For example, vapor deposition may be performed. For example, one technique includes thermally spraying a ceramic material (such as) onto the surface of one or both of jaw members 110 and 120 to form stop member 90. Several thermal spray techniques are contemplated, and these techniques are used to stop a wide range of refractory insulating materials from depositing on various surfaces and controlling the gap distance between the conductive surfaces 112 and 122. It includes making the member 90.

  As energy is selectively transmitted through the tissue across the jaw members 110 and 120 to the end effector assembly 100, a tissue seal is formed, isolating the two tissue halves. At this point, using other known vascular sealing instruments, the user removes the forceps 10 and replaces it with a cutting instrument (not shown) to divide the tissue half along the tissue seal. There must be. As can be appreciated, this is time consuming and tedious and is inaccurate along the tissue seal due to misalignment or misplacement of the cutting instrument along the ideal tissue cutting plane. Can result in significant tissue division.

  As explained in detail above, the present disclosure incorporates a knife assembly 70 that, when actuated via a trigger knob 76, selectively selectively brings tissue into an ideal tissue surface. Along and split in a precise manner, effectively and easily split this tissue into two sealed halves with a tissue gap in between. Knife assembly 70 allows a user to quickly separate tissue immediately after sealing without changing the cutting instrument through a cannula or trocar port. As can be appreciated, accurate sealing and division of tissue is achieved using the same forceps 10.

  It is anticipated that the knife blade 190 may also be coupled to the same or an alternative electrosurgical energy source to facilitate tissue separation along the tissue seal. Further, it is anticipated that the angle of the knife blade tip 192 may be dimensioned to provide a larger or smaller penetration angle depending on the particular purpose. For example, the knife blade tip 192 may be positioned at an angle that reduces “tissue chips” associated with the cut. In addition, the knife blade tip 192 may have different blade shapes (eg, serrated, notched, perforated, hollow, concave, convex depending on the particular purpose or to achieve a particular result. Etc.). It is also contemplated that the forceps 10 may be operated in monopolar mode to divide the tissue after formation of the tissue seal.

  Once the tissue is divided into tissue halves, jaw members 110 and 120 can be opened by re-gripping handles 30a and 30b, moving each handle 30a and 30b outwardly relative to housing 20. Let The knife assembly 70 is generally expected to cut in a unidirectional manner (ie, distally) as it advances.

  As best shown in FIGS. 3A-3C, the proximal portions of the jaw members 110 and 120 and the distal end 16 of the shaft 12 are covered by a resilient or flexible insulating material or boot 220, particularly as a single piece. The stray current concentration during electrosurgical operation in the polar mode of operation may be reduced. More specifically, the boot 220 can bend from a first configuration (see FIG. 3B) to a second expanded configuration (see FIGS. 3A and 3C). This first configuration is when the jaw members 110 and 120 are placed in a closed orientation, and this second expanded configuration is when the jaw members 110 and 120 are open. As can be appreciated, when jaw members 110 and 120 are open, the boot flexes or expands in regions 220a and 220b to accommodate the movement of proximal flanges 113 and 123. Further details regarding one anticipated insulating boot 220 can be found in US Pat. Appln. No. 60 / 722,213 [Attorney Case No. 203-4546 (H-US-00237)], filed concurrently. The name “INSULATING BOOT FOR ELECTROSURGICAL FORCEPS” is incorporated herein by reference in its entirety.

  18-22C illustrate one particularly useful embodiment of a safety lockout mechanism 255 'for use with flex circuit 170'. Much like the safety lockout 255 described above, the lockout mechanism 255 'is located on the handle 30a' at a point distal to the trigger lockout 32 '. This particular safety lockout 255 'is configured to extend perpendicular to the longitudinal axis "A" as best shown in FIG. Movement of handle 30a 'toward housing 20 causes safety lockout 255' to move toward housing 20 in a manner similar to that described above. Safety lockout 255 'engages safety switch 171' of flex circuit 170 'and handle 30a' (and then jaw members 110 and 120) is moved relative to housing 20 (ie, handle 30a). 'And 30b are both closed and gripping tissue).

  As best shown in the schematic diagram of FIG. 20, safety switch 171 'is designed as part of circuit 400, so that circuit 400 remains open until safety switch 171' is activated. FIG. 21 shows the position of the safety switch 171 'before and after assembly. More specifically, during assembly, the safety switch 171 ′ is deflected into place by the top portion 20 a of the housing 20 (see the creation line) so that the distal portion of the safety switch 171 ′ is Energized and plugged into an inner wall or ledge 173 'disposed within the housing 20b. It is anticipated that the safety switch 171 'will remain fixed in place for the useful life of the forceps 10.

  22A-22C show the sequence of operation of the safety switch 171 '. More specifically, as described above, when safety switch 171 ′ is assembled (and handles 30a ′ and 30b and jaws 110 and 120 are open), as shown in FIG. Fixed to the inner wall or ledge 173 '. Upon movement of the handle 30a ′ toward the housing 20b, the safety lockout 255 ′ moves inward relative to the housing 20b and toward the safety switch 171 ′ as shown in FIG. 22B. . As handles 30a 'and 30b move to the closed position (as described in detail above), safety lockout 255' engages safety circuit 171 'to complete circuit 400 and forceps 10 Allows selective operation of

  Even if the safety switch 171 ′ is configured to allow both bipolar and monopolar operation once closed, it may be configured in a more limited manner (eg, resetting the safety switch 171 ′ (ie, the handle 30a ′ and 30b may be configured to open and grip again, allowing only one type of electrical actuation at a time (without a separate toggle switch (not shown), etc.) is assumed. Furthermore, the safety switch 171 ′ simply protects against the operation of one of the multiple modes (ie, monopolar mode) and the other mode (ie, bipolar mode) depending on the particular purpose. It is also envisioned that can be configured not to be limited by safety switch 171 ′.

  In view of the above, with reference to the various drawings, those skilled in the art will appreciate that certain modifications can also be made to the present disclosure without departing from the scope of the present disclosure. For example, it may be preferable to add other features to the forceps 10, such as an articulation assembly for moving the end effector assembly 100 axially relative to the elongate shaft 12.

  It is also contemplated that forceps 10 (and / or an electrosurgical generator used in connection with forceps 10) may include a sensor or feedback mechanism (not shown). This sensor or feedback mechanism also automatically selects the appropriate amount of electrosurgical energy to effectively seal the specially sized tissue grasped between the jaw members 110 and 120. . This sensor or feedback mechanism can also measure impedance across the tissue during sealing and provides an indication (visual or audible) that an effective seal has occurred between the jaw members 110 and 120. obtain. An example of such a sensor system is described in commonly-assigned US patent application Ser. No. 10 / 427,832, entitled “METHOD AND SYSTEM FOR CONTROLLING OUTPUT OF RF MEDICAL GENERATOR”, the entire contents of which are described herein. It is incorporated by reference in the book.

  In addition, it is contemplated that the knife assembly 70 may include other types of rebound mechanisms designed to accomplish the same purpose. This rebound mechanism is, for example, a rebound activated by a gas, a rebound (that is, a solenoid) actuated electrically, or the like. It is anticipated that the forceps 10 can also be used to cut tissue without sealing. Alternatively, knife assembly 70 can be connected to the same or alternative electrosurgical energy source to facilitate tissue cutting.

  Although the drawings illustrate forceps 10 for manipulating isolated vessels, it is contemplated that forceps 10 can be used with non-isolated vessels as well. Other cutting mechanisms are also contemplated for cutting tissue along an ideal tissue surface.

  The outer surface of the end effector assembly 100 is a nickel-based material, coating, stamped portion designed to reduce adhesion between the jaw members 110 and 120 to the surrounding tissue during actuation and sealing. It is contemplated that a metal injection molding may be provided. Further, it is also contemplated that the conductive surfaces 112 and 122 of the jaw members 110 and 120 can be made from one (or a combination of one or more) of the following materials: nickel-chromium, chromium nitride MedCoat 2000 (from Electrolizing Corporation, OHIO), Inconel 600 and tin-nickel. Conductive surfaces 112 and 122 that contact the tissue may also be coated with one or more of the above materials to achieve the same result (ie, a “non-stick surface”). As can be appreciated, reducing the amount of tissue "sticking" during sealing improves the overall efficacy of the device.

  One particular class of materials disclosed herein has shown excellent non-stick properties and in some instances has shown excellent seal quality. For example, nitride coatings (including but not limited to TiN, ZrN, TiAlN, and CrN) are preferred materials for use for non-stick purposes. CrN has been found to be particularly useful for non-stick purposes due to its overall surface properties and optimal performance. Other classes of materials have also been found to reduce overall sticking. For example, a high nickel / chromium alloy with a Ni / Cr ratio of about 5: 1 has been found to significantly reduce adhesion in bipolar devices. One particularly useful non-stick material of this class is Inconel 600. Bipolar devices having sealing surfaces 112 and 122 made of or coated with Ni200, Ni201 (about 100% Ni) also showed improved non-stick performance over typical bipolar stainless steel electrodes.

  Although the drawings show one particular type of monopolar lockout or safety mechanism 255 for use with the forceps of the present disclosure, FIGS. 18 and 19 illustrate alternative safety locks that may be used with the forceps 10. The out mechanism is shown.

  Although several embodiments of the present disclosure are shown in the drawings, the present disclosure is not intended to be limited thereto. This is because the present disclosure is intended to be as broad as the field allows and the specification is equally readable. Therefore, the above description should not be construed as limiting, but merely as exemplifications of preferred embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto.

  The endoscopic forceps includes a housing, and the housing includes a shaft attached to the housing, and the shaft includes a pair of jaw members disposed at a distal end thereof. The forceps also includes a drive assembly disposed in the housing. The drive assembly moves the jaw members relative to each other from a first position to a second position. In the first position, the jaw members are arranged in spaced relation to each other, and in the second position, the jaw members are close to each other for manipulating tissue. A pair of handles are operably coupled to the drive assembly, and the handles are movable relative to the housing such that the drive assembly is activated to move the jaw members. Each jaw member is adapted to couple with a source of electrical energy so that each jaw member can transmit energy to treat tissue. The forceps also includes a first switch disposed on the housing. The first switch is operable to selectively deliver energy of a first potential to the at least one jaw member for treating tissue in a monopolar manner. A second switch is disposed on the housing and selectively delivers a first potential energy to one jaw member and a second potential energy to treat tissue in a bipolar manner. Can be selectively delivered to the other jaw member.

Various embodiments of the apparatus of the present invention are described herein with reference to the drawings.
FIG. 1A is a top perspective view of an endoscopic forceps comprising a housing, a handle assembly, a shaft and an end effector assembly according to the present disclosure shown in an open state. 1B is a top perspective view of the endoscopic forceps of FIG. 1A illustrating a closed end effector assembly in accordance with the present disclosure. 2 is a bottom perspective view of the endoscopic forceps of FIG. 1A. 3A is an enlarged left perspective view of the end effector assembly of FIG. 1A. 3B is an enlarged left perspective view of the end effector assembly of FIG. 1B. 3C is an enlarged side perspective view of the end effector assembly of FIG. 1A. 3D is an enlarged end view of the end effector assembly of FIG. 1A. FIG. 4 is a top internal perspective view of the forceps of FIG. 1A without showing the housing cover. FIG. 5A is an enlarged top view of the forceps of FIG. 1A showing the placement of internal components when the forceps are in an open configuration. FIG. 5B is an enlarged top view of the forceps of FIG. 1B showing the placement of internal components when the forceps are in a closed configuration. 6A is an enlarged perspective view of the internal working components of the forceps of FIG. 1B showing the knife actuator in a non-actuated position. 6B is an enlarged perspective view of the internal working components of the forceps of FIG. 1B showing the knife actuator in action. FIG. 7 is an enlarged side view of the knife actuator in a non-actuated position. FIG. 8A is an enlarged top cross-sectional view of the end effector of the end effector assembly showing the knife of the knife actuator in the most proximal or non-actuated position. 8B is a super enlarged top cross-sectional view of the end effector assembly of FIG. 8A showing the position of the knife after actuation. FIG. 9A is an enlarged top view showing the handle assembly in a non-actuated position. FIG. 9B is an enlarged top view showing the handle assembly after actuation. FIG. 10A is a very enlarged side cross-sectional view of the end effector assembly shown in an open configuration. FIG. 10B is an enlarged side cross-sectional view of the end effector assembly shown in a closed configuration. FIG. 10C is a super enlarged front perspective view of the lower jaw member of the end effector assembly showing the knife of the knife actuator in the most proximal or non-actuated position. FIG. 10D is a super enlarged front perspective view of the lower jaw member of FIG. 10C showing the position of the knife after actuation. FIG. 11A is an enlarged top view similar to FIG. 9B showing the knife actuator after actuation. FIG. 11B is a super enlarged side cross-sectional view of the end effector assembly showing the position of the knife after actuation. 12 is a top perspective view of the forceps of FIG. 1B illustrating rotation of the end effector assembly. FIG. 13 is a top perspective view of the forceps with the parts separated. FIG. 14 is an enlarged perspective view of the housing with parts separated. FIG. 15A is a super enlarged perspective view of the lower jaw of the end effector assembly with the parts separated. FIG. 15B is a super enlarged perspective view of the upper jaw of the end effector assembly with the parts separated. FIG. 16 is an enlarged perspective view of a circuit board for use with forceps according to the present disclosure. FIG. 17 is a super enlarged perspective view of an elongate shaft for receiving various moving parts of the drive assembly and knife assembly. FIG. 18 is a top perspective view of an alternative safety lockout mechanism for use with the forceps of FIG. 1A. FIG. 19 is a top view of a flexible circuit board for use with the forceps of FIG. 1A. FIG. 20 is a schematic diagram illustrating operational features of the safety switch of the flexible circuit board of FIG. 21 is an internal perspective view showing the assembly of the safety switch of FIG. 19 in the forceps housing. FIG. 22A is an internal view showing the operational movement of the safety lockout mechanism of FIG. 18 when the lockout mechanism is engaged with a safety switch on the flexible circuit board. FIG. 22B is an internal view showing the operational movement of the safety lockout mechanism of FIG. 18 when the lockout mechanism is engaged with the safety switch of the flexible circuit board. FIG. 22C is an internal view showing the operational movement of the safety lockout mechanism of FIG. 18 when the lockout mechanism is engaged with the safety switch of the flexible circuit board. FIG. 23 is a schematic electrical circuit diagram of the electrical switching assembly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Forceps 20 Housing 30 Handle assembly 70 Knife assembly 80 Rotation assembly 100 End effector assembly 110, 120 Jaw member 170 Switch assembly

Claims (17)

Endoscopic forceps, the following:
A housing having a shaft attached to the housing, the shaft comprising a pair of jaw members disposed at a distal end of the shaft;
A drive assembly disposed in the housing, wherein the drive assembly is operable to move the jaw members relative to each other from a first position to a second position; A drive assembly wherein the jaw members are spaced apart from each other and in the second position the jaw members are in close proximity to each other for manipulating tissue;
A pair of handles operably coupled to the drive assembly, wherein the handles are movable relative to the housing such that the drive assembly operates to move the jaw members;
A first switch disposed on the housing and operative to selectively deliver energy of a first potential to at least one jaw member for treating tissue in a monopolar manner. A first switch that is possible; and a second switch, disposed on the housing, for transferring tissue of a first potential to one jaw member for treating tissue in a bipolar manner. Comprising a second switch that is operable to selectively deliver and selectively deliver energy of a second potential to the other jaw member;
Each jaw member is adapted to couple with a source of electrical energy so that the jaw member can transmit energy to treat tissue and the endoscopic forceps are distal to the handle A toggle link and gear teeth located at the ends, each of the jaw members comprising an insulative housing and a conductive surface, the conductive surfaces of the jaw members being substantially opposite in position to each other; The handle of the forceps is disposed on the opposite side of the housing and is movable from a first, spaced position relative to the housing, to a second, closer position relative to the housing. der is, forceps prevents actuation of the first switch when the jaw members are disposed in said first position, includes a monopolar lockout, the single pole lockout, the said housing Equipped with pressure operated safety switch And movement of the handle from a first position relative to the housing to a second position relative to the housing, closes the pressure-actuated safety switch, enables operation of the first switch Endoscopic forceps. The endoscopic forceps according to claim 1, further comprising a knife assembly operably coupled to the housing, wherein the knife assembly is disposed when the jaw member is positioned in the second position. An endoscopic forceps that is selectively operable to advance a knife through tissue disposed between the jaw members. The endoscopic forceps according to claim 2, wherein at least one of the handles comprises a knife lockout, wherein the knife lockout is located when the jaw member is positioned in the second position. Endoscopic forceps that prevent the knife assembly from working. 4. The endoscopic forceps according to claim 3, wherein the lockout mechanism includes a mechanical interface extending from at least one of the handles, the mechanical interface having a handle relative to the housing. When positioned in one open position, dimensioned to impede movement of the knife assembly and the mechanical interface when the handle is positioned in a second position relative to the housing An endoscopic forceps dimensioned to allow movement of the knife assembly. The endoscopic forceps according to claim 1 , wherein the monopolar lockout comprises a mechanical interface disposed on at least one of the handles, the mechanical interface being connected to the housing. When the first switch is disposed in the first position, the first switch is prevented from operating, and when the handle is disposed in the second position with respect to the housing, the first switch is activated. Acceptable endoscopic forceps. The endoscopic forceps according to claim 1, wherein the housing includes a pair of slits defined on opposite sides of the housing, and the handle is movable relative to the housing within the slit. Endoscopic forceps. The endoscopic forceps according to claim 1, wherein the forceps comprises a longitudinal axis defined through the forceps, and the handle is disposed at an angle α relative to the longitudinal axis. Endoscopic forceps. The endoscopic forceps according to claim 1, further comprising an intensity controller operable to adjust the intensity of electrosurgical energy to the forceps during operation. The endoscopic forceps according to claim 8 , wherein the intensity controller is operable only in a monopolar mode. The endoscopic forceps according to claim 8 , wherein the intensity controller comprises a slide potentiometer. The endoscopic forceps according to claim 1, wherein the forceps further comprises an electrical safety device, the electrical safety device being in a bipolar or monopolar format for any time. An endoscopic forceps operable to adjust to operate with either. The endoscopic forceps according to claim 1, wherein at least one of the jaw members includes a monopolar extension, the monopolar extension beyond the insulating housing of the at least one jaw member. Endoscopic forceps that extend and allow precise cutting of tissue. Endoscopic forceps, the following:
A housing having a shaft attached to the housing, the shaft comprising a pair of jaw members disposed at a distal end of the shaft;
A drive assembly disposed in the housing, wherein the drive assembly is operable to move the jaw members relative to each other from a first position to a second position; A drive assembly wherein the jaw members are spaced apart from each other and in the second position the jaw members are in close proximity to each other for manipulating tissue;
A pair of handles operably coupled to the drive assembly, wherein the handles are movable relative to the housing such that the drive assembly operates to move the jaw members;
A first switch disposed on the housing and operative to selectively deliver energy of a first potential to at least one jaw member for treating tissue in a monopolar manner. A first switch is possible;
A second switch disposed on the housing for selectively delivering energy of a first potential to one jaw member and treating the tissue in a bipolar manner; and A second switch operable to selectively deliver potential energy to the other jaw member;
The first switch and the second switch are independently and exclusively operable with respect to each other;
Each jaw member is adapted to couple with a source of electrical energy so that the jaw member can transmit energy to treat tissue and the endoscopic forceps are distal to the handle A toggle link and gear teeth located at the ends, each of the jaw members comprising an insulative housing and a conductive surface, the conductive surfaces of the jaw members being substantially opposite in position to each other; The handle of the forceps is disposed on the opposite side of the housing and is movable from a first, spaced position relative to the housing, to a second, closer position relative to the housing. der is, forceps prevents actuation of the first switch when the jaw members are disposed in said first position, includes a monopolar lockout, the single pole lockout, the said housing Equipped with pressure operated safety switch And movement of the handle from a first position relative to the housing to a second position relative to the housing, closes the pressure-actuated safety switch, enables operation of the first switch Endoscopic forceps. An electrosurgical system comprising:
An electrosurgical generator;
Endoscopic forceps, the following:
A housing having a shaft attached to the housing, the shaft comprising a pair of jaw members disposed at a distal end of the shaft, wherein the jaw members are coupled to the electrosurgical generator. Adapted to the housing;
A drive assembly disposed in the housing, wherein the drive assembly is operable to move the jaw members relative to each other from a first position to a second position; A drive assembly wherein the jaw members are spaced apart from each other and in the second position the jaw members are in close proximity to each other for manipulating tissue;
A pair of handles operably coupled to the drive assembly, wherein the handles are movable relative to the housing such that the drive assembly operates to move the jaw members;
A first switch disposed on the housing and operative to selectively deliver energy of a first potential to at least one jaw member for treating tissue in a monopolar manner. A first switch that is possible; and a second switch, disposed on the housing, for transferring tissue of a first potential to one jaw member for treating tissue in a bipolar manner. An endoscopic forceps comprising a second switch, selectively operable and operable to selectively deliver energy of a second potential to the other jaw member, the endoscope The forceps comprises a toggle link and gear teeth located at the distal end of the handle, each of the jaw members comprising an insulating housing and a conductive surface, the conductive surfaces of the jaw members being relative to each other The positions of the forceps The handle is disposed on opposite sides of the housing, and the first, from a position spaced relative to the housing, the second, Ri movable der to closer position relative to said housing The forceps includes a monopolar lockout that prevents actuation of the first switch when the jaw member is disposed in the first position, the monopolar lockout being disposed in the housing. A pressure actuated safety switch and movement of the handle from a first position relative to the housing to a second position relative to the housing closes the pressure actuated safety switch and that enables the operation of the switch, the electrical surgical system. 15. The electrosurgical system according to claim 14 , wherein the generator comprises a control circuit, the control circuit being independent and exclusive operation of the forceps in either bipolar or monopolar mode. An electrosurgical system comprising a safety circuit operable to allow 15. The electrosurgical system according to claim 14 , wherein the safety circuit is electromechanical and is activated during movement of the pair of handles relative to the housing. 15. The electrosurgical system according to claim 14 , wherein the generator comprises a control circuit, the control circuit comprising an isolation circuit operably coupled to the second switch, and the second An electrosurgical system operable to regulate the energy to the jaw members while bypassing high current energy around the switch.

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