JP7297521B2 - Endoscopic Electrocautery Dissecting Scissors - Google Patents

Description

The present invention relates to endoscopic electrocautery cutting scissors for cutting a living tissue while holding it between a pair of scissor pieces and applying a required electric current to cauterize the living tissue and stop bleeding.

Conventionally, endoscopy as a treatment instrument for endoscopes has been used together with endoscopes as medical instruments for performing procedures such as resecting lesions in body cavities or incising living tissue to stop bleeding. 2. Description of the Related Art Electrocautery scissors for endoscopes (high-frequency treatment instruments for endoscopes, ultrasonic treatment instruments for endoscopes, microwave treatment instruments for endoscopes, etc.) are known.

Endoscopic electrocautery incision scissors have, for example, a treatment section having a pair of scissor piece sections with conductive blades at the distal end position to be inserted into the body cavity of a living body and with an insulating coating on the rest of the scissors other than the blades. After injecting hyaluronic acid or the like under the affected area in advance so that the affected area is raised from the normal tissue, the treatment area is inserted into the treatment instrument guide channel of the endoscope so as to be advanced and retracted. Furthermore, by protruding from the opening at the distal end of the endoscope and inserting it into the body cavity of the living body, the treatment section is remotely operated from the proximal end side, and the desired area is sandwiched between the lesion site and the normal tissue with a pair of scissors. current (for example, high-frequency voltage, low-voltage incision waveform voltage, microwave, ultrasonic wave, etc.) to cauterize and incise while stopping bleeding so as to remove lesions and the like.

JP 2016-87450 A

Conventional endoscopic electrocautery incision scissors include a pair of scissor piece portions that can be opened and closed at a portion distal to a rotating shaft of the treatment portion, each of which is provided with a conductive blade portion and a blade portion. Approximately the entire peripheral surface except for the portion is covered with an insulating film, and a high-frequency current is applied to the blade portion to cauterize the living tissue in the body cavity to stop bleeding and incise.

When the energization of the blades is of a bipolar type, the joule heat can be energized even after the pair of blades have passed each other, and the Joule heat is transmitted to the mucosal tissue to be incised for a long time. A smooth incision can be made because sufficient time is taken for evaporation and coagulation. However, in the case of the monopolar type, there is a problem that after the pair of blades have passed each other, the electricity is not supplied, so that the incision cannot be performed.

Furthermore, in both the bipolar type and the monopolar type, the pair of scissor pieces closes during incision and blocks heat transfer from the boundary between the lesion and normal tissue. The Joule heat transmitted from the normal tissue to the normal tissue raises the temperature of the normal tissue. To enable smooth incision, lengthen the time for Joule heat to be transmitted from the pair of blades to the mucosal tissue to be incised, and allow sufficient time for temperature rise, moisture evaporation, and coagulation of the mucosal tissue. It is necessary. However, if the incision time is lengthened slightly, the temperature of the normal tissue will rise too much during the incision, which may cause delayed perforation at the incision site.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. Even if the incision time is longer than before, a sufficient amount of Joule heat can be transferred from the cutting edge to the boundary between the lesion and the normal tissue. and reducing the amount of Joule heat transferred to the normal tissue side of the living tissue. Endoscopic electrocautery can improve the sharpness of the incision by allowing enough time for the temperature of the mucosal tissue to rise, evaporate water, and coagulate, and there is no risk of slow-acting perforation at the incision site. The purpose is to provide an incision scissors.

In order to achieve the above object, the electrocautery incision scissors for endoscopes according to the present invention comprise a flexible sheath that can be inserted into and removed from a channel of an endoscope, and an operation wire that is movably arranged in the sheath. and an operation portion connected to the rear end side of the operation wire and the sheath for advancing and retreating the operation wire arranged in the sheath , a tubular portion provided at the distal end portion of the sheath, and the tubular portion. A treatment portion supporting means having a pair of opposing arms extending toward the distal end side, and a pair of scissor pieces made of a conductive material pivotally supported so as to overlap in an X shape, each of the scissors pieces a pair of scissors for incising the affected part of the living tissue by opening and closing the distal end portion of each of the scissors piece portions by opening and closing the rear end side portion of the scissors portion receiving the advance and retreat motion force of the operation wire. A specular electrocautery dissecting scissors, comprising:
The scissors portion
a first filament portion made of an elongated wire rod and having a tip end portion and a base end portion to form a blade portion;
a first arch-shaped support frame for connecting and supporting both ends coated with an insulating film and extending in a flat plate arch shape to the distal end and the base end of the first filament portion; and the first arch-shaped support. a first scissor piece including a first intermediate portion extending toward the proximal end of the frame;
a second filament portion made of an elongated wire rod and having a tip end portion and a base end portion to form a blade portion;
a second arch-shaped support frame for connecting and supporting both ends coated with an insulating film and extending in a flat plate arch shape to the distal end and the base end of the second filament portion; and the second arch-shaped support. a second scissor piece including a second intermediate portion extending toward the proximal end of the frame;
a support shaft penetrating through the intermediate portions of the first and second arch-shaped support frames and supporting the opposing inner surfaces of the first and second arch-shaped support frames to cross each other in an X-shape to open and close;
Both ends of the first and second arch-shaped support frames support the first and second filar portions, and the distance between the first and second filament portions is the first and second arch-shaped support frames. It is connected and supported so that it spreads beyond the interval of the inner surface of the frame,
This is the first feature.

The endoscopic electrocautery incision scissors according to the present invention is the endoscopic electrocautery incision scissors according to the first characteristic, wherein the first and second filament portions are arranged in the first and second arch-shaped supports. It is connected and supported on the outer surface of the arched both ends of the frame,
This is the second feature.

The endoscopic electrocautery incision scissors according to the present invention is the endoscopic electrocautery incision scissors according to the first or second feature, wherein the filaments are made of the same material as or a different material from the arch-shaped support frame, Alternatively, a third feature is that the wire is composed of a twisted wire obtained by twisting the wire rods .

The endoscopic electrocautery incision scissors according to the present invention is the endoscopic electrocautery incision scissors according to any one of the first to third characteristics, wherein the first and second arch-shaped support frames are arranged on the inner surface of the endoscopic electrocautery incision scissors. A fourth feature is that they are rotatably supported by a support shaft with an insulating spacer that widens the space therebetween .

According to the present invention, even if the incision time is longer than in the conventional art, a sufficient amount of Joule heat can be transferred from the cutting edge to the boundary between the lesion and the normal tissue, and the living tissue can be transferred to the normal tissue side. It is possible to realize hemostatic incision that achieves a tradeoff between suppressing the heat transfer amount of Joule heat and making incision time longer than before, increasing the temperature of the mucosal tissue at the boundary and evaporating water. Also, it is possible to provide endoscopic electrocautery dissecting scissors which can improve sharpness when performing incision by taking sufficient time for coagulation and which does not cause slow perforation at the incision site.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining an endoscope system including endoscopic electrocautery incision scissors according to a first embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall view of endoscopic electrocautery incision scissors according to a first embodiment of the present invention; FIG. 2 is a partially cross-sectional front view showing a state in which the scissors pieces of the electrocautery incision scissors for endoscopes according to the first embodiment of the present invention are open; FIG. 2 is a partially cross-sectional front view showing a state in which the scissors pieces of the endoscopic electrocautery incision scissors according to the first embodiment of the present invention are closed; 1 is a perspective view showing a state in which the scissors piece portion of the electrocautery incision scissors for an endoscope according to the first embodiment of the present invention is opened; FIG. FIG. 4 is an explanatory view showing incision made with the electrocautery incision scissors for endoscopes according to the first embodiment of the present invention; FIG. 10 is a filament portion of a modified example applied to the electrocautery incision scissors for endoscopes according to the first embodiment of the present invention. FIG. FIG. 8 is a partially cross-sectional front view showing a state in which the scissors pieces of the electrocautery incision scissors for endoscopes according to the second embodiment of the present invention are open.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an endoscopic electrocautery cutting scissors according to the present invention will be described below with reference to the drawings. In the present embodiment, the side on which the scissors portion is located is called the front end side, and the side on which the operation portion is located is called the rear end side.

[Embodiment 1]
[Endoscope system]
FIG. 1 shows an endoscope system to which the electrocautery scissors for endoscopes according to Embodiment 1 are applied. This endoscope system 1 includes an insertion portion 2 to be inserted into a body cavity of a living body, an endoscope operation portion 3 having a dial and operating the dial to bend the distal end of the insertion portion 2 vertically and horizontally, A therapeutic instrument introduction section 4 having a branched structure arranged to connect the insertion section 2 and the endoscope operation section 3 is provided, and the inside of the insertion section 2 extends from the treatment instrument introduction section 4 in the longitudinal direction toward the insertion distal end. An endoscope channel 5 is formed, and a scissors portion (treatment portion) 16 and a sheath 11 of an endoscopic electrocautery incision scissors (endoscope treatment instrument) 10 are inserted into the endoscope channel 5. is configured to

[Basic Configuration of Endoscopic Electrocautery Scissors 10]
As shown in FIG. 2, the endoscopic electrocautery incision scissors 10 include a flexible elongated sheath 11 which is inserted into and removed from the endoscope channel 5 and inserted into the body, and which is disposed in the sheath 11 so as to be able to move forward and backward. an operation wire 12, an operation portion 13 for advancing and retracting the operation wire 12 on the rear end side, treatment portion support means 14 provided at the distal end portion of the sheath 11, and a support shaft 15 that rotates around the treatment portion support means 14; and a scissors part 16 which is movably supported and performs incision of living tissue.

The configuration of the endoscopic electrocautery cutting scissors 10 will be described in more detail below with reference to FIGS. 3, 4, 5(a) and (b).

The sheath 11 is an elongated cylindrical body having flexibility and moderate stiffness (bending resistance). Preferably, the length is 500-2000 mm. The sheath 11 may be composed of a coil sheath and a flexible resin jacket covering the outer surface of the coil sheath. It may consist of only

The operation wire 12 is arranged loosely in the sheath 11 so as to be able to move forward and backward, and is made of a torque wire that is conductive and has high rotational followability. For example, the operation wire 12 may be made entirely of stainless steel, or may be made of stainless steel on the rear end side and nickel-titanium alloy on the front end side, and both may be connected by a stainless steel pipe.

The operation part 13 is connected to the operation wire 12 and the rear end side of the sheath 11 and is configured to operate the operation wire 12 to advance and retreat.

The operating portion 13 moves the operating wire 12 by relatively sliding (advancing and retreating) a slider 13 a attached to the proximal end of the operating wire 12 and an operating portion main body 13 b attached to the proximal end of the sheath 11 . can be moved in the longitudinal direction, and the operation wire 12 is moved to the distal end side by moving the slider 13a leftward in the figure (to the distal end side).

The treatment portion supporting means 14 has a tubular portion 14a connected and fixed to the distal end portion of the sheath 11, and a pair of arm portions 14b extending bifurcated from the distal end portion of the tubular portion 14a. The cylindrical portion 14a is fitted over the distal end portion of the sheath 11 and further connected and fixed by brazing, soldering, adhesion or crimping. The treatment portion support means 14 can be formed, for example, by slitting a stainless steel tube having a required small diameter and required length from one end.

The scissors part 16 has a pair of left-right opposite scissors piece parts 17 and 18 overlapping in an X shape. The pair of scissors piece portions 17 and 18 are positioned so that the intermediate portions 17a and 18a overlap between the pair of arm portions 14b in an X shape, and the support shaft 15 passes through the intermediate portions 17a and 18a so as to be rotatable. Both ends of the support shaft 15 pass through the pair of arm portions 14b and are fixed to the pair of arm portions 14b. The pair of scissors pieces 17 and 18 are made of, for example, stainless steel or nickel-titanium alloy .

The rear ends of the portions 17b and 18b of the pair of scissors pieces 17 and 18 on the rear end side of the support shaft 15 are connected to a pair of opening and closing links 17d and 18d by pins, and furthermore, the pair of opening and closing links 17d and 18d are connected by pins. 18 d is pin-connected to the forward/backward transmission link 19 , and the forward/backward transmission link 19 is connected and fixed to the distal end portion of the operation wire 12 .

Accordingly, portions 17c and 18c of the pair of scissors piece portions 17 and 18 on the distal end side of the support shaft 15 are configured to open and close as follows. First, when the operation wire 12 is moved to the distal end side, the pair of opening/closing operation links 17d and 18d are operated so as to increase the leg opening angle, thereby causing the rear end side portions 17b and 18b to move the operation wire 12 forward and backward. By receiving the force and being in the open state, the distal end side portions 17c and 18c of the pair of scissor pieces 17 and 18 relative to the support shaft 15 are in the open state. On the other hand, when the operation wire 12 is moved to the rear end side, the pair of opening/closing operation links 17d and 18d are operated so as to reduce the leg opening angle, so that the rear end side portions 17b and 18b move the operation wire 12 forward and backward. By receiving the operating force and the leg opening angle becomes smaller, the distal end side portions 17c and 18c of the pair of scissors piece portions 17 and 18 are closed relative to the support shaft 15. As shown in FIG. Therefore, by advancing and retreating the operation wire 12, the distal end portions 17c and 18c of the pair of scissor pieces 17 and 18 are opened and closed to cut the living tissue in the body cavity.

A connection terminal 21 is provided on the slider 13a. The connection terminals 21 are supplied with a high-frequency current or the like from, for example, a high-frequency power supply, a low-voltage incision waveform current power supply, or an ultrasonic oscillator. A high-frequency current or the like is supplied to the links 17d and 18d.

Ensuring electrical insulation will be described. An insulating coating is provided on the inner and outer surfaces of the sheath 11 . An insulating coating is provided on the outer surface of the treatment portion supporting means 14 . The scissors piece 17 and the scissors piece 18 are electrically insulated from each other, except for the blades of the distal end portions 17c and 18c, provided with an insulating coating on their outer surfaces. Either a spacer made of an insulating material is interposed between the scissors piece portion 17 and the scissors piece portion 18, or a boss portion is provided on one of the scissors piece portion 17 and the scissors piece portion 18, and an insulating coating is applied to the scissors piece portion 17. and the scissor pieces 18, for example, a gap of 0.2 to 0.3 mm is preferably provided. The opening/closing link 17d and the opening/closing link 18d are electrically insulated from each other with insulating coatings provided on their outer surfaces. The scissors portion 17 and the opening/closing link 17d are electrically connected, and the scissors portion 18 and the opening/closing link 18d are electrically connected. The insulating coating is preferably made of a so-called inert synthetic resin material such as fluorine resin, which is chemically and thermally stable. The outer surface of the sheath 11, the outer surface of the treatment portion supporting means 14, and the outer surface of the scissors portion 16 are further coated with a hydrophilic coating so that smooth insertion can be performed without friction when inserted into the body cavity. are endowed with gender. Hydrophilicity can also be imparted at the same time by coating a high-molecular material such as polyimide, nylon, POM, PTFE, or the like, which is resistant to burning of the mucous membrane and has good slipperiness, as the insulating coating.

[Characteristic Configuration of Endoscopic Electrocautery Incision Scissors 10]
The tip side portions 17c and 18c of the scissors pieces 17 and 18 are formed into an arched middle portion 17a behind the line portions 25 and 26 in the opening/closing direction of the scissors. , 18a to support the proximal ends a and distal ends b of the filaments 25 and 26, and between the proximal ends a and b, the filaments 25 and 26 are spaced apart from each other. , 28.

The filament portions 25 and 26 are made of conductive wires that are separate from the arch-shaped support frames 27 and 28 and that are hard to break and rust, such as titanium wires, stainless steel wires, or spring wires. The portions where the arch-shaped support frames 27 and 28 support the base end and the tip of the filament portions 25 and 26 are the base and tip of the side surface on the opposite side with respect to the arch-shaped support frame on the opposite side. is. A recess is formed in each of the base end portion and the tip end portion of the side surface portion, and the base end portion and the tip end portion of the filament portions 25 and 26 are accommodated in the pair of recesses, and are welded, brazed, or soldered. It is bound and supported by The linear portions 25 and 26, which are blade portions, do not have an insulating coating, and the arch-shaped support frames 27 and 28 have an insulating coating.

[Actions and Effects Based on Characteristic Configuration of Endoscopic Electrocautery Incision Scissors 10]
At the time of incision, first, hyaluronic acid or the like is injected under the affected area in advance so that the affected area is raised from the normal tissue. 6(a) and 6(b), a pair of filaments 25 and 26 sandwich the border between the lesion site and the normal tissue, and perform a desired operation by performing a remote operation on the proximal end side. Current (for example, high-frequency current, low-voltage incision waveform current, ultrasonic waves, etc.) is applied to cauterize, and incision is performed while stopping bleeding so as to remove lesions and the like. The incision by the endoscopic electrocautery cutting scissors 10 does not cut the living tissue by shearing force, but applies a high frequency voltage (or a low voltage incision waveform voltage, microwave , ultrasonic waves, etc.) are applied to cauterize and cut the living tissue. A high-frequency voltage or the like can be applied while visually checking the abutting filament portions 25 and 26, and incision can be performed carefully. As shown in FIG. 6(a), the filaments 25 and 26 supported by the arch-shaped support frames 27 and 28 approaching each other in the direction of the arrows, precede the arch-shaped support frames 27 and 28 and reach the lesion site. It approaches by sandwiching the border with normal tissue. The arch-shaped support frames 27, 28 are spaced apart so as to pass each other closely, and the linear portions 25, 26 are provided on the outer side surfaces of the arch-shaped support frames 27, 28, so as shown in FIG. 6(b). Thus, there is a separation distance when they pass each other , and this separation distance allows the filaments 25 and 26 to close the incision. The trailing arch-shaped support frames 27, 28 suppress the movement of normal tissue toward the lesion site.

The Joule heat transmitted from the striae portions 25 and 26 is transmitted not only to the boundary between the lesion site and the normal tissue but also to the normal tissue side. will inflate. However, since there is a gap between the filamentary portion 25 and the arch-shaped support frame 27 and between the filamentary portion 26 and the arch-shaped support frame 28, the Joule heat transferred to the normal tissue side is dissipated into the arch-shaped support frame 27. , 28, the mucosal tissue is changed into a large amount of bubbles F from the gaps between the filamentous portions 25, 26 and the arch-shaped support frames 27, 28, and the mucosal tissue is displaced in the ablation direction along with heat transfer. It migrates to the lesion site side. For this reason, the amount of Joule heat transmitted to normal tissue is significantly reduced compared to conventional configuration examples (for example, the scissors pieces 12 and 22 having blades 13 and 23 as in the configuration of Patent Document 1), so the incision Even if the time is subtly lengthened, a larger amount of bubbles F is accompanied by heat transfer, so the temperature rise of the normal tissue during incision is suppressed from becoming too large, and slow-acting perforation may occur at the incision site. is canceled.

In a bipolar current supply both of the filaments 25 and 26 are electrodes, and in a monopolar current supply one of the filaments 25 and 26 is an electrode. Since there is a gap between the striated portions 25, 26 and the arch-shaped support frames 27, 28, when the striated portions 25, 26 contact and move to the border region between the lesion site and the normal tissue, the striated portions 25, 26 Since the arch-shaped support frames 27 and 28 do not exist between 26, even in the case of a monopolar type, the Joule heat is transmitted to the mucosal tissue for a long time. You can make a smooth incision because you can take time.

That is, the incision time is set longer than before to provide a sufficient amount of Joule heat to be transferred from the blade to the boundary between the lesion and the normal tissue, and the Joule heat is transferred to the normal tissue side of the living tissue. It is possible to achieve hemostatic incision that achieves a tradeoff between keeping the amount of heat small and to make the incision time longer than before, and to improve the sharpness when performing the incision than before.

[Modification of Characteristic Configuration of Endoscopic Electrocautery Cutting Scissors 10]
The filament portions 25 and 26 are separate from the arch-shaped support frames 27 and 28, and as shown in FIG. You can replace it with whatever you want. When twisted, the sharpness is further improved due to the unevenness of the surface.

[Embodiment 2]
[Basic configuration]
FIG. 8 shows electrocautery incision scissors for an endoscope according to Embodiment 2. FIG. The basic configuration of the endoscopic electrocautery incision scissors 10A is different in the following points. In the endoscopic electrocautery cutting scissors 10A of Embodiment 2, the scissors portion 16A does not include the opening/closing operation links 17d and 18d and the forward/backward movement transmission link 19 shown in FIG. Operation wires 12A and 12B are passed through. The two operating wires 12A and 12B protrude between the arm portions 14b of the treatment portion support means 14A provided at the distal end of the sheath 11A, gradually widen the distance, and extend behind the pair of scissor pieces 17A and 18A. It is connected to the rear ends of the end portions 17b and 18b. Therefore, the pair of scissors piece portions 17A and 18A are configured such that the two operation wires 12A and 12B are integrally advanced and retracted to expand and contract the spread angle of the tip portions of the two operation wires 12A and 12B. Tip portions 17c, 18c of the pieces 17A, 18A are opened and closed. The two operation wires 12A and 12B also serve as power supply lines, and are sufficiently insulated from each other so as not to cause an electrical short circuit. The sheath 11A is covered with an insulating tube. In addition, the code|symbol same as Embodiment 1 is attached|subjected about the partial structure same as Embodiment 1. FIG.

[Characteristic Configuration of Endoscopic Electrocautery Incision Scissors 10]
A characteristic configuration of Embodiment 2 is that the wire portion 25A and the arch-shaped support frame 27A, which are the distal end side portions 17c and 18c of the scissor piece portions 17A and 18A, and the wire portion 26A and the arch-shaped support frame 28A are separated from each other. It is formed integrally by making cuts 29 and 30 in a conductive material instead of a structure.

The effects of the electrocautery dissection scissors 10A for endoscopes of the second embodiment are the same as the effects of the electrocautery dissection scissors 10 for endoscopes of the first embodiment.

According to the present invention, even if the incision time is longer than before, a sufficient amount of Joule heat can be transferred from the blade to the boundary between the lesion and the normal tissue, and the living tissue can be transferred to the normal tissue side. It is possible to realize hemostatic incision that achieves a tradeoff between suppressing the heat transfer amount of Joule heat and making incision time longer than before, increasing the temperature of the mucosal tissue at the boundary and evaporating water. Excellent endoscopic electrocautery incision scissors, which has the effect of making an incision sharper by taking a sufficient time for coagulation and eliminating the risk of slow-acting perforation at the incision site. can be provided.

Reference Signs List 1 endoscope system 2 insertion section 3 endoscope operation section 4 treatment instrument introduction section 5 endoscope channel 10, 10A endoscope electrocautery incision scissors 11, 11A sheath 12, 12A, 12B operation wire 13 operation section 13a Slider 13b Operation section body 14, 14A Treatment section support means 14a Tube section 14b Arm section 15 Support shaft 16, 16A Scissors section 17, 18, 17A, 18A Scissors piece section 17a, 18a Middle section 17b, 18b Rear end side section 17c, 18c tip side portion 17d, 18d opening/closing operation link 19 advance/retreat transmission link 2 1 connection terminal 23, 24 power supply line 25, 25A, 26, 26A wire portion 27, 27A, 28, 28A arch-shaped support frame 29A notch a base end Part b Tip

Claims (4)

a flexible sheath that is inserted into and removed from a channel of an endoscope;
an operation wire disposed in the sheath so as to be able to move back and forth;
an operation unit connected to the operation wire and the rear end side of the sheath , and operating the operation wire arranged in the sheath to move forward and backward;
treatment portion support means having a tubular portion provided at the distal end portion of the sheath and a pair of opposed arms extending from the tubular portion toward the distal end;
It has a pair of scissors pieces made of a conductive material that are rotatably supported so as to overlap in an X shape, and the rear end side portions of the scissors pieces are opened and closed by receiving the advancing and retreating force of the operation wire. a scissors section for opening and closing the tip side portion of each of the scissors piece sections to incise the affected part of the living tissue;
An endoscopic electrocautery dissecting scissors comprising:
The scissors portion
a first filament portion made of an elongated wire rod and having a tip end portion and a base end portion to form a blade portion;
a first arch-shaped support frame for connecting and supporting both ends coated with an insulating film and extending in a flat plate arch shape to the distal end and the base end of the first filament portion; and the first arch-shaped support. a first scissor piece including a first intermediate portion extending toward the proximal end of the frame;
a second filament portion made of an elongated wire rod and having a tip end portion and a base end portion to form a blade portion;
a second arch-shaped support frame for connecting and supporting both ends coated with an insulating film and extending in a flat plate arch shape to the distal end and the base end of the second filament portion; and the second arch-shaped support. a second scissor piece including a second intermediate portion extending toward the proximal end of the frame;
a support shaft penetrating through the intermediate portions of the first and second arch-shaped support frames and supporting the opposing inner surfaces of the first and second arch-shaped support frames to cross each other in an X-shape to open and close;
Both ends of the first and second arch-shaped support frames support the first and second filar portions, and the distance between the first and second filament portions is the first and second arch-shaped support frames. It is connected and supported so that it spreads beyond the interval of the inner surface of the frame,
Endoscopic electrocautery incision scissors characterized by: The first and second filament portions are connected to and supported by outer surfaces of both arch-shaped ends of the first and second arch-shaped support frames,
The electrocautery incision scissors for an endoscope according to claim 1, characterized in that: The filament portion is composed of a wire made of the same material as or different from that of the arch-shaped support frame, or a twisted wire obtained by twisting the wire.
The electrocautery incision scissors for an endoscope according to claim 1 or 2, characterized in that: The first and second arch-shaped support frames are rotatably supported by a support shaft with an insulating spacer interposed between the inner side surfaces thereof.
The electrocautery incision scissors for an endoscope according to any one of claims 1 to 3, characterized in that:

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