Endoscope scissors

Abstract

Provided are endoscope scissors that are capable of reducing effort required during treatment and capable of reducing treatment time.　These endoscope scissors 10 comprise: a scissors mechanism 20 that has a pair of scissor members 21, 22 coupled to each other by a first support shaft S1 and cuts a target site by opening and closing one scissor member 22 and the other scissor member 21, using the first support shaft S1 as a fulcrum therefor; and an electrode 40 having a monopolar electrode (electrode 40) formed on a tip 22x of one of the scissor members 22 out of the two scissor members 21, 22. An operator can perform various treatments without exchanging the endoscope scissors 10, by using the scissor mechanism 20 comprising the pair of scissor members 21, 22 to quickly and extensively cut a target site or by using the electrode 40 to stop bleeding at the target site or cut the target site.

Description

Technical Field

[0001] The present invention relates to an endoscopic scissor for performing a treatment by extending it from the tip of an insertion portion in an endoscope.

Background Art

[0002] Various devices (treatment tools) for endoscopes are prepared. For example, forceps for grasping, compressing, or lifting tissues and scissors for cutting tissues are known. Further, as devices for flowing a high-frequency current to cut tissues or to fuse tissues for hemostasis, a monopolar electrode type electric scalpel, a bipolar electrode type forceps, and the like are known.

[0003] For example, Patent Document 1 describes an endoscopic surgical multifunctional device with forceps or a clamp in which a jaw portion enabling grasping or holding of a tissue is also formed as a bipolar electrode, and a circular disk-shaped monopolar electrode is incorporated in a solid jaw portion.

[0004] Further, Patent Document 2 describes a bipolar forceps provided with a monopolar extension portion in which a monopolar element that selectively extends is accommodated in one of a pair of opposing jaw members.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] As described above, in the conventional endoscopic forceps described in Patent Documents 1 and 2, a monopolar electrode is provided on the forceps, allowing for tissue to be grasped while simultaneously being cut or hemostasis performed using the monopolar electrode. However, when cutting a wide area of ​​tissue quickly, it is necessary to withdraw the conventional endoscopic forceps with a monopolar electrode from the endoscope port and replace it with endoscopic scissors. Also, if the area to be cut is fibrous tissue with low water content, it is difficult to cut with high-frequency current from the monopolar electrode, and in this case too it is necessary to switch to endoscopic scissors, making the procedure time-consuming and complicated.

[0007] Therefore, the present invention aims to provide endoscopic scissors that can reduce the effort involved in the procedure and shorten the procedure time. [Means for solving the problem]

[0008] The endoscope scissors of the present invention are characterized by comprising a scissors mechanism in which a pair of scissor members are connected by a pivot shaft, and the pair of scissor members are opened and closed with the pivot shaft as a fulcrum to cut a target area, and an electrode part in which a monopolar electrode is formed on the tip of one of the pair of scissor members.

[0009] With the endoscopic scissors of the present invention, the operator can quickly cut a wide area of ​​the target using the scissors mechanism consisting of a pair of scissor members, or stop bleeding or cut the target area using a monopolar electrode, so that various procedures can be performed without changing the endoscopic scissors of the present invention.

[0010] The electrode portion may be formed at a position where, when the pair of scissor members are closed, the center line of the scissor mechanism portion passing through the support shaft coincides with the center line along the protruding direction of the monopolar electrode. Even when the insertion section of the endoscope is rotated axially, and the endoscopic scissors of the present invention rotate axially, the monopolar electrode is formed at a position where the center line of the scissors mechanism and the center line along the protruding direction of the monopolar electrode coincide. This prevents the direction of the monopolar electrode directed towards the target site from deviating from the target site, allowing for stable treatment.

[0011] The electrode portion may have a base portion that is the same thickness as the thickness of the one scissor member, and may be provided on the thickness surface of the one scissor member. One of the scissor members and the monopolar electrode can be formed from a single metal sheet by punching, and the scissor member and the monopolar electrode can be cut out as a single unit. Therefore, manufacturing is easy.

[0012] The electrode portion can be formed such that the tip portion maintains its thickness while the width direction perpendicular to the thickness direction protruding direction becomes shorter. Since the tip of the monopolar electrode can be formed into a pointed shape, an arc discharge can be reliably directed from the tip towards the target area, allowing treatment to be performed on the target area.

[0013] The electrode portion may comprise a base formed from a rod-shaped body and a block portion formed at the tip of the base. By providing the block portion to the base formed from a rod-shaped body, the block portion can be a hemispherical body, a cylindrical body, a polygonal prism, an elliptical cross-section, a cone, or the like.

[0014] The block portion can be formed in a polygonal prism shape. Because the block portion is formed in a polygonal prism shape, the high-frequency current concentrates more easily at the pointed end, making arc discharge more likely. Therefore, by forming the block portion in a polygonal shape, arc discharge can be generated from the corner closest to the tissue.

[0015] The block portion can be formed in an octagonal prism shape. If the block portion is in the shape of an octagonal prism, it is easy to aim and it is possible to easily send a high-frequency current to a desired site.

[0016] Of the pair of scissor members, the other scissor member is a cutter having a blade portion, and one of the pair of scissor members can be a die having a first surface for receiving the target site and a second surface facing the relief surface of the cutter when the cutter moves in the cutting direction.

Advantages of the Invention

[0017] The endoscopic scissors of the present invention can perform various treatments without replacement, so it is possible to reduce the labor during the treatment and shorten the treatment time.

Brief Description of the Drawings

[0018] [[ID=1V]] [Figure 1] It is a diagram showing endoscopic scissors according to an embodiment of the present invention, (A) is a diagram of the scissor mechanism portion in an open state, and (B) is a diagram of the scissor mechanism portion in a closed state. [Figure 2] It is a diagram of the scissor mechanism portion of the endoscopic scissors shown in FIG. 1, (A) is a diagram of the scissor member formed on the cutter, and (B) is a diagram of the scissor member formed on the die. [Figure 3] It is a diagram for explaining the electrode portion of the endoscopic scissors shown in FIG. 1, and is a diagram showing the exposed surface and the insulating surface. [Figure 4] It is a schematic diagram showing a state where the pair of scissor members of the endoscopic scissors shown in FIG. 1 overlap each other. [Figure 5] It is a diagram for explaining the opening and closing operation of the endoscopic scissors shown in FIG. 1, (A) is a diagram of the scissor member in an open state, and (B) is a diagram of the scissor member in a closed state. [Figure 6] (A) to (H) are diagrams showing modified examples of the electrode portion. [Figure 7] It is a diagram of a state where an octagonal prism-shaped block portion is provided on the rod-shaped portion of the electrode portion.

Embodiments for Carrying Out the Invention

[0019] An endoscopic scissors according to an embodiment of the present invention will be described based on the drawings. In this specification, the scissor side will be described as the tip side or the front side, and the wire side will be described as the base end side or the rear side. Further, the direction in which the wire is pushed to open the scissors will be described as the advancing direction, and the direction in which the wire is pulled to close the scissors will be described as the retreating direction.

[0020] The endoscopic scissors 10 shown in FIGS. 1(A) and 1(B) are scissors that are inserted from the forceps port of the endoscope with the scissor mechanism portion closed, taken out from the suction port at the tip of the insertion portion, and cut the tissue at the target site. The endoscopic scissors 10 include a scissor mechanism portion 20, a link mechanism portion 30, and an electrode portion 40. For example, the scissor mechanism portion 20 according to the present embodiment is formed to have a length of about 6 mm from the base end portion to the tip end portion. Further, each thickness of the scissor mechanism portion 20 is formed to be about 0.5 mm. The electrode portion 40 is formed to be about 1.5 mm.

[0021] The scissor mechanism portion 20 includes a pair of scissor members (one scissor member 22 and the other scissor member 21) and a first support shaft S1 (support shaft) that connects the pair of scissor members 21 and 22 so as to be openable and closable, and is formed in an X shape. On the scissor member 21, a cutting side 21p from the tip end portion 2lx to the central portion 21y in which a through hole 21t into which the first support shaft S1 is inserted is formed is formed in a substantially V shape, and an operation side 21q from the central portion 21y to the base end portion 21z is formed in a shape in which the width gradually narrows. A through hole 21u for connecting to the link mechanism portion 30 is formed at the base end portion 21z of the scissor member 21.

[0022] On the inner surface of the cutting side 21p of the scissor member 21, a blade surface whose thickness gradually becomes thinner is formed, so that the scissor member 21 functions as a cutter having a blade portion 21b. In the present embodiment, as shown in FIG. 4, the angle θ (tool angle) formed by the rake face 21c inclined with respect to the cutting direction F1 (closing direction) of the scissor member 21 and the flank face 21d parallel to the cutting direction F1 is formed to be 20° to 40°.

[0023] In Figures 1(A) and 1(B), and Figure 2(B), one of the scissor members 22, similar to the scissor member 21, has a cutting side 22p formed in a roughly V shape from the tip 22x to the central part 22y where the through hole 22t into which the first support shaft S1 is inserted is formed, and an operating side 22q formed in a shape that gradually narrows in width from the central part 22y to the base end 22z. A through hole 22u is formed at the base end 22z of the scissor member 22 for connecting to the link mechanism 30.

[0024] The inner surface of the cutting side 22p of the scissor member 22 functions as a die, having a first surface 22m that receives the target area and a second surface 22n that faces the relief surface 21d (see Figure 4) of the scissor member 21 when the scissor member 21, which functions as a cutter, moves in the cutting direction F1 (closing direction). In this embodiment, the second surface 22n is formed on a surface parallel to the cutting direction F1. From the through holes 21t and 22t into which the first support shaft S1 of the scissor members 21 and 22 is inserted, to the through holes 21u and 22u into which the second support shaft (described later) is inserted, the scissor members 21 and 22 are formed to be the same length.

[0025] As shown in Figures 1(A) and 1(B), the link mechanism 30 consists of a pair of links 31 and 32 of the same length, each connected to the base ends 21z and 22z of the scissor mechanism 20 by a pair of second support shafts S21 and S22. One link 31 and the scissor member 21 are connected by a second support shaft S21 integrally formed at one end 31e of the link 31, which is rotatably inserted and fixed into a through hole 21u (see Figure 2(A)) of the scissor member 21. Furthermore, the other link 32 and the scissor member 22 are connected by a second support shaft S22 integrally formed at one end 32e of the link 32, which is rotatably inserted and fixed into the through hole 22u of the scissor member 22 (see Figure 2(B)).

[0026] A third support shaft S3 is formed integrally with the other end 31o of link 31. A through hole 32t is formed at the other end 32o of link 32, into which the third support shaft S3 is inserted in order to connect the other ends 31o and 32o together when they are overlapped. Furthermore, thin-walled sections 31m and 32m are formed at the other ends 31o and 32o of links 31 and 32, respectively, so that the thickness of the overlapping links 31 and 32 does not change even if a connecting section for connecting a wire is placed between them. The third support shaft S3 is formed to a length that protrudes from the link 32.

[0027] As shown in Figure 3, the electrode portion 40 has the same thickness T as the scissor member 22 and is a monopolar electrode formed by a rod-shaped portion protruding from the thickness surface 22s of the tip portion 22x of the scissor member 22. As shown in Figure 5(B), the electrode portion 40 is formed at a position where the center line L1 of the scissor mechanism 20 passing through the first support axis S1 coincides with the center line L2 of the electrode portion 40 along the protruding direction when the scissor members 21,22 (scissor mechanism 20) are closed.

[0028] As shown in Figure 3, the electrode portion 40 comprises a rectangular bar-shaped base portion 41 and a semicircular tip portion 42 extending from the tip of the base portion 41. The electrode portion 40 is formed in a semicircular shape at the tip portion 42 while maintaining its thickness. Therefore, the electrode portion 40 is formed such that the width direction Fw, which is perpendicular to the thickness direction Ft, is shortened while maintaining its thickness at the tip portion 42.

[0029] The electrode portion 40 is formed on a discharge surface 40s that is exposed from the insulating coating, with a portion of the thickness surface 41s on the tip portion 42 side of the base portion 41 and the thickness surface 42s of the tip portion 42 being the discharge surface 40s. Therefore, the surface of the endoscope scissors 10 other than the discharge surface 40s of the electrode portion 40 is formed on an insulating surface 20s covered by the insulating coating.

[0030] The usage of the endoscope scissors according to the embodiment of the present invention configured as described above will be explained with reference to the drawings. As shown in Figure 5(A), the target part C is positioned between the scissor members 21 and 22 of the open scissor mechanism 20. The operator pulls a wire (not shown) connected to the support shaft S3 in the backward direction F21. As the wire is pulled, the other ends 31o and 32o of the links 31 and 32 connected to the third support shaft S3 move backward (backward direction F21). As the other ends 31o and 32o of the links 31 and 32 move backward, one end 31e and 32e is pulled backward.

[0031] In this way, the operating sides 21q and 22q of the scissor members 21 and 22, which are connected to one end 31e and 32e of links 31 and 32 by the second support shafts S21 and S22, move in the closing direction with the first support shaft S1 as the pivot point. As the operating sides 21q and 22q move in the closing direction, the cutting sides 21p and 22p of the scissor members 21 and 22 also move in the closing direction.

[0032] At this time, as shown in Figure 4, the blade portion 21b of the scissor member 21 and the first surface 22m (opposing surface) of the scissor member 22 come into contact with the target area located within the area enclosed by the scissor members 21 and 22. The target area that comes into contact with the scissor member 21 having the blade portion 21b may begin to cut at that point. In addition, the target area that comes into contact with the right-angle shoulder portion 22o formed by the first surface 22m and the second surface 22n of the scissor member 22 may also begin to cut. However, in many cases, the narrowing of the distance between the cutting ends 21p and 22p of the scissor members 21 and 22 can cause the target area, such as viscoelastic flesh or fibrous and hardened flesh, to slide and escape along the blade 21b and the first surface 22m even when it comes into contact with the scissor members 21 and 22. In addition, the narrowing of the distance between the base ends of the cutting ends 21p and 22p can also cause the target area to slide and escape.

[0033] As shown in Figure 5(A), the blade portion 21b of the scissor member 21 and the first surface 22m, which is the receiving surface of the scissor member 22, are formed in a concave V-shape. Therefore, when the target part C is gripped by the cutting ends 21p and 22p of the scissor members 21 and 22, the target part C can be cut at the tip end. Furthermore, even if the target part C shifts away at the tip end, the target part C can be moved towards the center of the blade portion 21b and the first surface 22m as the scissor members 21 and 22 close.

[0034] Furthermore, when the target portion C is gripped by the base ends of the cutting sides 21p and 22p of the scissor members 21 and 22, the target portion C can be cut at the base end. Even if the target portion C slides away at the base end, the target portion C can be moved towards the center of the blade portion 21b and the first surface 22m as the scissor members 21 and 22 close.

[0035] Then, as shown in Figure 5(B), when the wire is pulled further, the scissor members 21 and 22 overlap and close, causing the target part C to be cut from the overlapping position of both the tip and base ends of the scissor members 21 and 22. Therefore, since the scissor members 21 and 22 can cut from both the tip and base ends of the cutting sides 21p and 22p, they are elastic and can cut the target area C without slipping, even in areas of flesh that are slippery due to mucous membranes, etc.

[0036] Furthermore, since the blade portion 21b is formed up to the tip 21x (blade edge) of the scissor member 21 and is sharp, even if the meat portion is located at the tip 21x, the tip 21x can bite into the meat portion being contacted, and the meat portion can be pressed against the first surface 22m of the scissor member 22. Therefore, the meat portion can be positioned between the scissor members 21 and 22 without slipping and cut.

[0037] Thus, the scissor member 21 functions as a cutter by forming a blade portion 21b with a scooping surface 21c and a relief surface 21d, and the scissor member 22 functions as a die having a first surface 22m and a second surface 22n. For example, if the scissors consist of cutters with blades formed on both sides of the scissor blades, they will bite into the target area well and have excellent cutting performance. However, because the thickness (blade width) of the blade tip is thin and straight, it is difficult to ensure high strength.

[0038] However, in the endoscope scissors 10 according to this embodiment, the scissor member in the scissor mechanism 20 firmly receives and holds the flesh of the target area with the first surface 22m of the scissor member 22 shown in Figure 4, while the blade portion 21b of the scissor member 21 grips and cuts the flesh, then passes over the second surface 22n of the scissor member 22. Therefore, because the thickness (blade width) of the blade tip is thick and planar, it has high strength, and the blade portion 21b of the scissor member 21 does not chip or crack.

[0039] Therefore, the endoscope scissors 10 according to this embodiment can be made to have good cutting ability and be resistant to chipping and cracking of the blade. Furthermore, if both parts were scissor members with cutters, it would be necessary to form sharp blades on both sides, which would require more processing time. However, in the endoscope scissors 10 according to this embodiment, the scissor member 22 is formed as a die, which allows for shorter processing time compared to using cutters.

[0040] To open the scissor members 21 and 22 again, as shown in Figure 5(B), the wire (not shown) is pushed in the advance direction F22, and the tips 21x and 22x (cutting sides 21p and 22p) of the scissor members 21 and 22 shown in Figure 5(A) open in the opposite direction to the above description.

[0041] If bleeding occurs due to the incision of the target tissue, hemostasis is necessary. The operator, with the scissors mechanism 20 shown in Figure 5(B) closed, points the electrode 40 towards the area where hemostasis is needed. Then, by operating a control device (not shown), a high-frequency current adjusted for hemostasis is output to the electrode unit 40. The high-frequency current flows as an arc discharge from the discharge surface 40s (see Figure 3) of the electrode unit 40, which is not covered with an insulating coating, into the tissue at the treatment site, thereby coagulating the target area and stopping the bleeding.

[0042] Furthermore, when cutting tissue, the operator operates the control device to output a high-frequency current adjusted for cutting to the electrode unit 40. Similar to hemostasis, the high-frequency current flows as an arc discharge from the discharge surface 40s of the electrode unit 40 to the tissue at the treatment site, burning and separating the target area.

[0043] In this way, the operator can quickly cut a wide area of ​​the target site using the scissor mechanism 20 of the endoscopic scissors 10, or stop bleeding or cut the target site using the electrode part 40 with a monopolar electrode. Furthermore, even if it is not possible to cut the fibrous tissue of the target site by applying the arc discharge from the electrode part 40, the scissor mechanism 20 can cut the fibrous tissue without changing the endoscopic scissors 10. Therefore, since various procedures can be performed without changing the endoscopic scissors 10, the endoscopic scissors 10 can reduce the effort involved in procedures and shorten the procedure time.

[0044] At this time, even if the endoscope scissors 10 rotates axially by rotating the insertion part of the endoscope around its axis, as shown in Figure 5(B), the electrode part 40 is formed at a position (thickness surface 22s of the tip part 22x) where the center line L1 of the scissors mechanism part 20 and the center line L2 of the electrode part 40 coincide when the pair of scissors members 21 and 22 are closed. Therefore, it is possible to prevent the direction of the electrode part 40 toward the target site from shifting, and the procedure can be performed in a stable state.

[0045] Furthermore, as shown in Figure 3, the electrode portion 40 has the same thickness T as the scissor member 22 and protrudes from the thickness surface 22s of the tip portion 22x of the scissor member 22. This allows the scissor member 22 formed by the die and the electrode portion 40 to be formed from a single metal plate by punching, and the scissor member 22 and the electrode portion 40 to be cut out integrally. Therefore, the manufacturing of the scissor member 22 and the electrode portion 40 is easy.

[0046] The electrode portion 40 is formed such that the tip portion 42 maintains its thickness while the width direction Fw, which is perpendicular to the thickness direction Ft, is shortened. Therefore, it is possible to easily generate an arc discharge from the discharge surface 40s (thickness surface 42s) of the tip portion 42 toward the target area, rather than from other parts of the electrode portion 40, and thus treat the target area.

[0047] As shown in Figure 1(A), with the tips 21x and 22x of the scissor members 21 and 22 in the scissor mechanism 20 facing upwards, and the scissor members 21 and 22 opened to the left and right, and as shown in Figure 1(B), when the scissor members 21 and 22 are closed and stacked, and viewed from the front, the tip 22x of the scissor member 22 extends to the right from the base of the electrode part 40, and the tip 21x of the scissor member 21 extends to the left from the base of the electrode part 40, so that the tips 21x and 22x extend in both left and right directions with the electrode part 40 as the center.

[0048] Therefore, when the electrode portion 40 is pushed into the target area to cut, the tips 21x and 22x of the scissor members 21 and 22 come into contact with the surrounding area of ​​the target area and function as stoppers. In this way, the tip 22x of the scissor member 22 extends beyond the position of the electrode portion 40, and the tip 21x of the scissor member 21 also extends beyond the position of the electrode portion 40, so that the tips 21x and 22x extend bidirectionally around the electrode portion 40, thereby preventing the electrode portion 40 from going in too far. Since the electrode portion 40 is prevented from penetrating too deeply into the target area, it is less likely to cause perforation and safety is enhanced.

[0049] Furthermore, by configuring the scissor mechanism 20 so that the scissor member 21 acts as a cutter and the scissor member 22 acts as a die, the target tissue can be cut by cutting rather than shearing when the scissor member 21 and the scissor member 22 overlap, thus achieving a sharp cutting edge.

[0050] In this embodiment, the electrode portion 40 is provided with a semicircular tip portion 42 on a rectangular rod-shaped base portion 41 of the scissor member 22 with a thickness T. However, the electrode portion can be provided with a conical portion, a spherical portion, a triangular pyramidal portion, a disc portion, or a polygonal prism-shaped block portion at the tip of the rod-shaped portion.

[0051] For example, the electrode section 40A shown in Figures 6(A) and 6(B) comprises a cylindrical rod-shaped section 43a and a conical block-shaped section 43b. The electrode section 40B shown in Figures 6(C) and 6(D) comprises a cylindrical rod-shaped section 44a and a hemispherical block-shaped section 44b. The electrode section 40C shown in Figures 6(E) and 6(F) comprises a prismatic rod-shaped section 45a and a rectangular plate-shaped block-shaped section 45b. The electrode section 40D shown in Figures 6(G) and 6(H) comprises a rod-shaped section 46a with an elliptical cross-section and a spherical block-shaped section 46b.

[0052] Furthermore, as shown in Figure 7, the electrode portion 40 can be provided with an octagonal prism-shaped block portion 40X at the tip of the rod-shaped portion 40Y. High-frequency currents are more likely to concentrate and generate arc discharges at pointed ends. For example, a rectangular prism-shaped (cuboidal or cubic) block has four corners on its top surface, while an octagonal prism-shaped block 40X has eight corners. Therefore, the octagonal block allows for positioning the eight corners closest to the tissue, enabling arc discharges to be generated from any of the eight corners. Consequently, an octagonal prism-shaped block is easier to aim and delivers high-frequency current to the desired area than a rectangular prism-shaped block. However, if the polygon has more corners than an octagonal prism, the interior angle will be larger than the 135° of an octagon, so the corners will become blunter, making it more difficult for arc discharge to occur. Therefore, it is desirable that the block portion 40X at the tip of the electrode portion 40 be octagonal prism-shaped.

[0053] As described above, the block portions 43b to 46b shown in Figures 6(A) to 6(H) and the block portion 40X shown in Figure 7 are formed to protrude around the axis from the upper end surface of the rod-shaped portions 43a to 46a and 40Y, allowing the protruding edges of the block portions 43b to 46b and 40X to be hooked onto the target area and cut.

[0054] The scissor mechanism 20 of this embodiment is composed of a combination of a scissor member 21 that functions as a cutter and a scissor member 22 that functions as a die. However, as shown in Figure 7, the scissor members may be combined as cutters, or as dies, although not shown. [Industrial applicability]

[0055] This invention is suitable for endoscopic scissors used for procedures, which are extended from the tip of the insertion section of an endoscope. [Explanation of symbols]

[0056] 10 Endoscope scissors 20. Scissors mechanism 20s Insulation surface 21,22 Scissors parts 21b Blade part 21c Scoop face 21d Escape Face 22m 1st side 22n 2nd page 22o Shoulder 22s Thickness 21p,22p cutting side 21q,22q Operation side 21t,21u,22t,22u through hole 21x,22x tip 21y,22y central part 21z,22z proximal end 30 Link mechanism 31,32 Links 31e,32e One end 31o, 32o other end 31m,32m thin section 32t through hole 40,40A~40D Electrode part 40s discharge surface 41 Base 42 Tip 41s, 42s Thickness side 43a~46a Rod-shaped part Blocks 43b-46b 40X Block Section 40Y rod part S1 1st spindle S21,S22 2nd support shaft S3 3rd spindle L1 Centerline of the scissor mechanism L2 electrode centerline F1 cutting direction F21 Reverse direction F22 Advance direction Ft Thickness direction Fw Width direction θ angle C Target area

Claims

1. A pair of scissor members are connected by a pivot shaft, and the pair of scissor members cut the target area by opening and closing the pivot shaft, The device includes an electrode portion formed only at the tip of one of the pair of scissor members, which protrudes from the tip of the scissor member in a position that does not overlap with the other scissor member even when the pair of scissor members are closed, and which is capable of stopping bleeding and cutting the target area. Endoscope scissors in which the part of the electrode other than the discharge surface is covered with an insulating coating.

2. A scissors mechanism comprising a pair of scissor members connected by a pivot shaft, the opening and closing of the pair of scissor members with the pivot shaft as a fulcrum to cut a target area, The device comprises an electrode portion in which a monopolar electrode is formed only on the tip of one of the pair of scissor members, The electrode portion, excluding the discharge surface, is covered with an insulating coating. The electrode portion has a base portion that is the same thickness as the thickness of the one scissor member, and is an endoscope scissor provided on the thickness surface of the one scissor member.

3. The electrode portion is formed such that the tip portion maintains its thickness while the width direction perpendicular to the thickness direction is shortened, as described in claim 2 for endoscope scissors.

4. The electrode portion is formed at a position where, when the pair of scissor members are closed, the center line of the scissor mechanism portion passing through the support shaft coincides with the center line along the protruding direction of the monopolar electrode, as described in any one of claims 1 to 3.

5. The endoscope scissors according to any one of claims 1 to 4, wherein the electrode portion comprises a base portion formed by a rod-shaped body and a block portion formed at the tip of the base portion.

6. The aforementioned block portion is formed in the shape of a polygonal prism, as described in claim 5 for endoscope scissors.

7. The aforementioned block portion is formed in the shape of an octagonal prism, as described in claim 6 for endoscope scissors.

8. The endoscopic scissors according to any one of claims 1 to 4, wherein the other of the pair of scissor members is a cutter having a blade, and one of the pair of scissor members is a die having a first surface for receiving the target portion and a second surface that faces the relief surface of the cutter when the cutter moves in the cutting direction.

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