Gastrointestinal polyp operation snare with multi-ring structure

Abstract

The invention discloses a multi-ring structured snare for gastrointestinal polyp surgery, which comprises a snare handle, one end of the snare handle is provided with a rotating seat, the other end of the snare handle is provided with an end cover, the snare handle is internally provided with a rotating mechanism close to one end of the rotating seat, and the rotating mechanism is connected with the rotating seat. A connecting seat is arranged at the end, away from the snare handle, of the rotating seat, an extending rod is arranged at the end, away from the rotating seat, of the connecting seat and is of a hollow structure, a snare body is arranged at the end, away from the connecting seat, of the extending rod, a snare guide wire is arranged at one end of the snare body, and the snare guide wire is arranged in the extending rod in a sleeved mode through a plug; and a fixing ring is arranged in the connecting seat. By arranging a series of structures, the rotation function of the snare is achieved, the operation angle of the snare is conveniently adjusted, rotation adjustment of the snare is convenient, accurate and stable, the snare electrically controls sliding knot tightening, and operation in the snare operation is simpler.

Description

Technical Field

[0001] The invention relates to the technical field of snares, in particular to a snare with a multi-ring structure for gastrointestinal polyp surgery. Background Art

[0002] The snare is a common surgical instrument. It is safe, convenient and economical. In gastrointestinal polyp surgery, the snare can be used to remove polyps. It is an instrument that uses a nylon rod to tighten the sliding knot previously tied with absorbable or synthetic thread to ligate blood vessels, polyps or other pipeline structures. It is easy to operate and has been used in many laparoscopic abdominal surgeries.

[0003] At present, during the use of the snare, although the snare wire of the snare can be manually rotated to adjust the angle direction, and the snare is tightened manually, the adjustment and tightening operations are inconvenient, making the snare difficult to operate during surgery, requiring experienced doctors to operate manually, and having poor stability. Summary of the invention

[0004] The object of the present invention is to provide a snare with a multi-ring structure for gastrointestinal polyp surgery to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a snare with a multi-ring structure for gastrointestinal polyp surgery, comprising a snare handle, one end of the snare handle is provided with a rotating seat, the other end of the snare handle is provided with an end cap, the snare handle is provided with a rotating mechanism inside the end close to the rotating seat, the rotating mechanism is connected to the rotating seat, the rotating seat is provided with a connecting seat at one end away from the snare handle, the connecting seat is provided with an insertion rod at one end away from the rotating seat, the insertion rod is arranged in a hollow structure, the insertion rod is provided with a snare body at one end away from the connecting seat, the snare body is provided with a snare guide wire at one end, and the snare guide wire is provided at one end of the snare handle. The wire is sleeved on the inside of the extension rod through a plug, a fixing ring is provided inside the connecting seat, the snare guide wire passes through the extension rod and is arranged inside the fixing ring, an inner sleeve is provided at the end of the rotating seat away from the connecting seat, a support seat is provided in the snare handle on one side of the rotating mechanism, the end of the inner sleeve away from the rotating seat is rotatably connected to the support seat, a rotating wire is provided inside the inner sleeve, one end of the rotating wire is fixedly connected to the snare guide wire that passes through the rotating seat and the connecting seat, the snare guide wire is fixedly arranged inside the rotating wire, a reciprocating mechanism is provided on the rotating wire, and the end of the rotating wire away from the snare guide wire passes through the through hole and passes through the support seat and the end cover.

[0006] Preferably, the rotating mechanism comprises a rotating guide rail, a groove, a gear ring, a gear and a connecting shaft; a rotating guide rail is provided at one end of the snare handle away from the end cover; a rotating groove is provided on a side of the rotating seat close to the snare handle; the rotating guide rail is slidably arranged inside the rotating groove; a groove is provided on a side of the rotating seat away from the connecting seat; the inner sleeve is arranged inside the groove; the groove is arranged in a circular groove structure; a gear ring is provided on the inner circumference of the groove; a gear is provided inside the groove; the gear is meshed with the gear ring; and one side of the gear is connected to the actuator through a connecting shaft.

[0007] Preferably, the actuator includes a worm wheel, a worm, a No. 1 motor, a mounting frame and a mounting seat, a mounting seat is provided inside the end of the snare handle away from the end cover, a mounting frame is provided at the bottom of the mounting seat, a worm wheel and a worm are provided on the mounting frame, the worm wheel and the worm are meshingly arranged, one side of the worm wheel is connected to the gear through a connecting shaft, one end of the worm is connected to the output end of the No. 1 motor through a coupling, and the No. 1 motor is arranged on the mounting frame.

[0008] Preferably, the reciprocating mechanism includes a connecting frame, a threaded rod, a No. 2 motor, a threaded sleeve, a movable frame, a rotating frame and a limiting slide rail. A connecting frame is provided inside the snare handle on the side of the support seat away from the inner sleeve. Two connecting frames are provided. A threaded rod is provided between the two connecting frames. One end of the threaded rod is connected to the output end of the No. 2 motor through a coupling. A threaded sleeve is provided on the threaded rod. A movable frame is provided at the bottom of the threaded sleeve. A rotating frame is provided inside the movable frame. A limiting slide groove is provided inside the movable frame. A limiting slide rail is provided on the outside of the rotating frame. The limiting slide rail is slidably arranged inside the limiting slide groove. The rotating line is fixedly arranged through the rotating frame.

[0009] Preferably, the snare body comprises a No. 1 snare wire and a No. 2 snare wire, both of which are arranged in an annular structure, and the No. 2 snare wire is arranged inside the No. 1 snare wire, and one end of the No. 1 snare wire and the No. 2 snare wire is connected to the extension rod through a plug sleeve.

[0010] Preferably, the ends of the No. 1 snare wire and the No. 2 snare wire away from the plug sleeve are both integrally provided with a protrusion, and the protrusion is arranged in a semi-elliptical structure.

[0011] Preferably, the end of the connecting seat away from the rotating seat is arranged in a V-shaped structure, and the outer surface of the circumference of the connecting seat close to the rotating seat is provided with scale lines.

[0012] Preferably, the end faces of the plug sleeve and the insertion rod are both arranged with arc-shaped chamfered structures.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The snare for gastrointestinal polyp surgery with a multi-ring structure realizes the rotation function of the snare through the rotating seat arranged on the snare handle, which cooperates with the inner sleeve, the connecting seat and the insertion rod, and facilitates the adjustment of the operating angle of the snare.

[0015] 2. The snare for gastrointestinal polyp surgery with a multi-ring structure cooperates with the gear, worm wheel, worm and No. 1 motor through the gear ring arranged in the groove to realize the rotation drive of the rotating seat and the snare, so that the rotation adjustment of the snare is convenient, accurate and stable, thereby facilitating the operation of the multi-ring structure snare in gastrointestinal polyp surgery.

[0016] 3. The snare for gastrointestinal polyp surgery with a multi-ring structure cooperates with a reciprocating mechanism through a support seat and a rotating wire arranged on an inner sleeve. The rotating wire rotates on a moving frame through a rotating frame, so that the rotating wire can be rotated and adjusted along with the snare. The moving frame reciprocates in the snare handle through a No. 2 motor, a threaded rod and a threaded sleeve, so that the rotating wire reciprocates in the snare handle to pull the snare body, thereby realizing the electric control of the snare to tighten the sliding knot to ligate the gastrointestinal polyp during surgery, and the operation of the snare during surgery is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the rotating seat in the present invention;

[0019] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 It is a schematic diagram of the structure of the gear in the present invention;

[0021] Figure 5 It is a structural schematic diagram of the raised portion in the present invention;

[0022] Figure 6 It is a structural schematic diagram of the snare handle in the present invention;

[0023] Figure 7 It is a structural schematic diagram of the mobile rack in the present invention.

[0024] In the figure: 1. snare handle; 2. rotating mechanism; 21. rotating guide rail; 22. groove; 23. gear ring; 24. gear; 25. connecting shaft; 26. worm wheel; 27. worm; 28. No. 1 motor; 29. ​​mounting frame; 210. mounting seat; 3. rotating seat; 4. reciprocating mechanism; 41. connecting frame; 42. threaded rod; 43. No. 2 motor; 44. threaded sleeve; 45. moving frame; 46. rotating frame; 47. limiting slide rail; 5. inner sleeve; 6. snare body; 61. No. 1 snare wire; 62. No. 2 snare wire; 63. plug sleeve; 64. protrusion; 7. insertion rod; 8. connecting seat; 9. fixed ring; 10. supporting seat; 11. rotating wire; 12. snare guide wire; 13. end cover. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] like Figures 1 to 7As shown, the present embodiment has a multi-ring structure snare for gastrointestinal polyp surgery, including a snare handle 1, one end of the snare handle 1 is provided with a rotating seat 3, the other end of the snare handle 1 is provided with an end cap 13, the snare handle 1 is provided with a rotating mechanism 2 inside the end close to the rotating seat 3, the rotating mechanism 2 is connected to the rotating seat 3, the rotating seat 3 is provided with a connecting seat 8 at the end away from the snare handle 1, the connecting seat 8 is provided with an insertion rod 7 at the end away from the rotating seat 3, the insertion rod 7 is arranged in a hollow structure, the insertion rod 7 is provided with a snare body 6 at the end away from the connecting seat 8, a snare guide wire 12 is provided at one end of the snare body 6, the snare guide wire 12 is arranged inside the insertion rod 7 through a plug sleeve 63, a fixing ring 9 is provided inside the connecting seat 8, the snare guide wire 12 penetrates the insertion rod 7 and is arranged inside the fixing ring 9, an inner sleeve 5 is provided at the end of the rotating seat 3 away from the connecting seat 8, a support seat 10 is provided inside the snare handle 1 on one side of the rotating mechanism 2, the inner sleeve 5 is away from the rotating seat 3 One end of the inner sleeve 5 is rotatably connected to the support seat 10, and a rotating wire 11 is provided inside the inner sleeve 5. One end of the rotating wire 11 is fixedly connected to the snare guide wire 12 that passes through the rotating seat 3 and the connecting seat 8. The snare guide wire 12 is fixedly arranged inside the rotating wire 11, and a reciprocating mechanism 4 is provided on the rotating wire 11. The end of the rotating wire 11 away from the snare guide wire 12 passes through the supporting seat 10 and the end cover 13 through a through hole. The rotating wire 11 can rotate with the rotating seat 3, and the rotating wire 11 can be telescopically moved in the connecting seat 8, the rotating seat 3, the supporting seat 10, and the end cover 13. The snare guide wire 12 can be retracted in the blocking head 63, the insertion rod 7, and the fixing ring 9, so as to realize the rotation function of the snare, facilitate the adjustment of the operating angle of the snare, and the rotation adjustment of the snare is convenient, accurate and stable, so as to facilitate the operation of the multi-ring structure snare in gastrointestinal polyp surgery, realize the electric control sliding knot tightening of the snare for ligation of gastrointestinal polyps in surgery, and make the operation of the snare during surgery simpler.

[0028] Specifically, the rotating mechanism 2 includes a rotating guide rail 21, a groove 22, a toothed ring 23, a gear 24 and a connecting shaft 25. The end of the snare handle 1 away from the end cover 13 is provided with a rotating guide rail 21, the rotating seat 3 is provided with a rotating groove on the side close to the snare handle 1, the rotating guide rail 21 is slidably arranged inside the rotating groove, the rotating seat 3 is provided with a groove 22 on the side away from the connecting seat 8, the inner sleeve 5 is arranged inside the groove 22, the groove 22 is arranged in a circular groove structure, the inner circumference of the groove 22 is provided with a toothed ring 23, the interior of the groove 22 is provided with a gear 24, the gear 24 and the toothed ring are connected to each other. 23 are meshed with each other, one side of the gear 24 is connected to the actuator through the connecting shaft 25, and the actuator drives the gear 24 to rotate through the connecting shaft 25. The rotation of the gear 24 drives the gear ring 23 meshed with it in the groove 22 to rotate, so that the rotating seat 3 rotates at one end of the snare handle 1, and the rotating guide rail 21 on the snare handle 1 rotates in the rotating groove of the rotating seat 3. The rotation of the rotating seat 3 drives the inner sleeve 5, the rotating wire 11, the rotating frame 46, the connecting seat 8, the insertion rod 7, the plug sleeve 63, the fixed ring 9 and the snare body 6, and the snare guide wire 12 to rotate.

[0029] Furthermore, the actuator includes a worm wheel 26, a worm 27, a No. 1 motor 28, a mounting frame 29 and a mounting seat 210. A mounting seat 210 is provided inside the end of the snare handle 1 away from the end cover 13, and a mounting frame 29 is provided at the bottom of the mounting seat 210. A worm wheel 26 and a worm 27 are provided on the mounting frame 29. The worm wheel 26 and the worm 27 are meshingly arranged. One side of the worm wheel 26 is connected to the gear 24 through a connecting shaft 25, and one end of the worm 27 is connected to the output end of the No. 1 motor 28 through a coupling. The No. 1 motor 28 is arranged on the mounting frame 29, and the No. 1 motor 28 on the mounting frame 29 drives the worm 27, the worm wheel 26, the connecting shaft 25, and the gear 24 to rotate.

[0030] Furthermore, the reciprocating mechanism 4 includes a connecting frame 41, a threaded rod 42, a second motor 43, a threaded sleeve 44, a movable frame 45, a rotating frame 46 and a limiting slide rail 47. A connecting frame 41 is provided inside the snare handle 1 on the side of the support seat 10 away from the inner sleeve 5. Two connecting frames 41 are provided. A threaded rod 42 is provided between the two connecting frames 41. One end of the threaded rod 42 is connected to the output end of the second motor 43 through a coupling. A threaded sleeve 44 is provided on the threaded rod 42. A movable frame 45 is provided at the bottom of the threaded sleeve 44. A rotating frame 46 is provided inside the movable frame 45. A limiting slide groove is provided inside the movable frame 45. A limiting slide rail 47 is provided on the outer side of the rotating frame 46. The limiting slide rail 47 is slidably arranged inside the limiting slide groove. The rotating line 11 is fixedly passed through the rotating frame 46. The second motor 43 drives the threaded rod 42 between the two connecting frames 41 to rotate. The threaded sleeve 44 threadedly arranged on the threaded rod 42 can reciprocate in the snare handle 1. Since the rotating wire 11 is fixedly installed on the rotating frame 46, when the snare rotation angle is adjusted, the rotating frame 46 rotates on the moving frame 45, and the limiting slide rail 47 on the rotating frame 46 rotates and slides in the limiting slide groove on the moving frame 45, so that the rotating wire 11 can rotate with the snare angle adjustment. With the cooperation of the threaded rod 42 and the threaded sleeve 44, the moving frame 45 can reciprocate in the snare handle 1. The movement of the moving frame 45 can drive the movement of the rotating frame 46 and the rotating wire 11 in the snare handle 1, that is, the rotating wire 11 is rotatable and movable in the snare handle 1. Under the action of the reciprocating mechanism 4, the movement of the rotating wire 11 inside the snare handle 1 can pull the snare guide wire 12 extending into the rod 7.

[0031] Furthermore, the snare body 6 includes a first snare wire 61 and a second snare wire 62, both of which are arranged in an annular structure, and the second snare wire 62 is arranged inside the first snare wire 61, and one end of the first snare wire 61 and the second snare wire 62 is connected to the extension rod 7 through a plug sleeve 63.

[0032] Furthermore, the ends of the No. 1 snare wire 61 and the No. 2 snare wire 62 away from the plug sleeve 63 are both integrally provided with a protrusion 64, and the protrusion 64 is arranged in a semi-elliptical structure to realize a multi-ring design of the snare.

[0033] Furthermore, the end of the connecting seat 8 away from the rotating seat 3 is arranged in a V-shaped structure, and the outer surface of the circumference of the connecting seat 8 close to the rotating seat 3 is provided with scale lines, so as to facilitate observation of the angle of the snare through the scale lines.

[0034] Furthermore, the end faces of the plug sleeve 63 and the insertion rod 7 are both arranged with arc-shaped chamfered structures, and the arc-shaped chamfered structures prevent the plug sleeve 63 and the insertion rod 7 from being damaged.

[0035] The method of using this embodiment is as follows: the No. 1 motor 28 on the mounting frame 29 drives the worm 27, the worm wheel 26, the connecting shaft 25, and the gear 24 to rotate. The rotation of the gear 24 drives the gear ring 23 meshing with it in the groove 22 to rotate, so that the rotating seat 3 rotates at one end of the snare handle 1. The rotating guide rail 21 on the snare handle 1 rotates in the rotating groove of the rotating seat 3. The rotation of the rotating seat 3 drives the inner sleeve 5, the rotating wire 11, the rotating frame 46, the connecting seat 8, the insertion rod 7, the plug sleeve 63, the fixed ring 9 and the snare body 6, and the snare guide wire 12 to rotate. The rotating mechanism 2 realizes the rotation function of the snare, which is convenient for adjusting the operating angle of the snare, so that the rotation adjustment of the snare is convenient, accurate and stable, thereby facilitating the operation of the multi-ring structure snare in gastrointestinal polyp surgery. The No. 2 motor 43 drives the threaded rod 42 between the two connecting frames 41 to rotate. The threaded sleeve 44 threadedly arranged on the threaded rod 42 can reciprocate in the snare handle 1. Since the rotating wire 11 is fixedly mounted on the The rotating frame 46 is on the rotating frame 46. When the snare rotation angle is adjusted, the rotating frame 46 rotates on the moving frame 45, and the limiting slide rail 47 on the rotating frame 46 rotates and slides in the limiting slide groove on the moving frame 45, so that the rotating line 11 can rotate with the snare angle adjustment. With the cooperation of the threaded rod 42 and the threaded sleeve 44, the moving frame 45 can reciprocate in the snare handle 1, and the movement of the moving frame 45 can drive the rotating frame 46 and the rotating line 11 to rotate in the snare handle. The movement inside the handle 1, that is, the rotating wire 11 is rotatable and movable inside the snare handle 1. Under the action of the reciprocating mechanism 4, the movement of the rotating wire 11 inside the snare handle 1 can pull the snare guide wire 12 inserted into the rod 7, that is, pull the snare body 6 at the end of the rod 7. The snare body 6 is pulled, so that the No. 1 snare wire 61 and the No. 2 snare wire 62 are tightened, so that the snare can be electrically controlled to tighten the sliding knot to ligate the gastrointestinal polyp during surgery, and the operation of the snare during surgery is simpler.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A snare with a multi-ring structure for gastrointestinal polyp surgery, comprising a snare handle (1), characterized in that: A rotating seat (3) is provided at one end of the snare handle (1), and an end cover (13) is provided at the other end of the snare handle (1). A rotating mechanism (2) is provided inside the end of the snare handle (1) close to the rotating seat (3), and the rotating mechanism (2) is connected to the rotating seat (3). A connecting seat (8) is provided at the end of the rotating seat (3) away from the snare handle (1). An insertion rod (7) is provided at the end of the connecting seat (8) away from the rotating seat (3). The insertion rod (7) is arranged in a hollow structure. A snare body (6) is provided at the end of the insertion rod (7) away from the connecting seat (8). A snare guide wire (12) is provided at one end of the snare body (6). The snare guide wire (12) is arranged inside the insertion rod (7) through a plug sleeve (63). A fixing ring (9) is provided inside the connecting seat (8). The snare guide wire (12) passes through the extension rod (7) and is arranged inside the fixed ring (9); an inner sleeve (5) is provided at the end of the rotating seat (3) away from the connecting seat (8); a support seat (10) is provided inside the snare handle (1) on one side of the rotating mechanism (2); the end of the inner sleeve (5) away from the rotating seat (3) is rotatably connected to the support seat (10); a rotating wire (11) is provided inside the inner sleeve (5); one end of the rotating wire (11) is fixedly connected to the snare guide wire (12) passing through the rotating seat (3) and the connecting seat (8); the snare guide wire (12) is fixedly arranged inside the rotating wire (11); a reciprocating mechanism (4) is provided on the rotating wire (11); the end of the rotating wire (11) away from the snare guide wire (12) passes through the support seat (10) and the end cover (13) through a through hole.

2. The snare for gastrointestinal polyp surgery with a multi-ring structure according to claim 1, characterized in that: The rotating mechanism (2) comprises a rotating guide rail (21), a groove (22), a toothed ring (23), a gear (24) and a connecting shaft (25); the end of the snare handle (1) away from the end cover (13) is provided with a rotating guide rail (21); the rotating seat (3) is provided with a rotating groove on the side close to the snare handle (1); the rotating guide rail (21) is slidably arranged inside the rotating groove; the rotating seat (3) is provided with a groove (22) on the side away from the connecting seat (8); the inner sleeve (5) is arranged inside the groove (22); the groove (22) is arranged in a circular groove structure; the inner circumference of the groove (22) is provided with a toothed ring (23); the inside of the groove (22) is provided with a gear (24); the gear (24) is meshed with the toothed ring (23); one side of the gear (24) is connected to the actuator through the connecting shaft (25).

3. The snare for gastrointestinal polyp surgery with a multi-ring structure according to claim 2, characterized in that: The actuator comprises a worm wheel (26), a worm (27), a first motor (28), a mounting frame (29) and a mounting seat (210); a mounting seat (210) is provided inside the end of the snare handle (1) away from the end cover (13); a mounting frame (29) is provided at the bottom of the mounting seat (210); a worm wheel (26) and a worm (27) are provided on the mounting frame (29); the worm wheel (26) and the worm (27) are meshed with each other; one side of the worm wheel (26) is connected to the gear (24) through a connecting shaft (25); one end of the worm (27) is connected to the output end of the first motor (28) through a coupling; and the first motor (28) is provided on the mounting frame (29).

4. The snare for gastrointestinal polyp surgery with a multi-ring structure according to claim 1, characterized in that: The reciprocating mechanism (4) comprises a connecting frame (41), a threaded rod (42), a second motor (43), a threaded sleeve (44), a moving frame (45), a rotating frame (46) and a limiting slide rail (47). A connecting frame (41) is provided inside the snare handle (1) on the side of the support seat (10) away from the inner sleeve (5). Two connecting frames (41) are provided. A threaded rod (42) is provided between the two connecting frames (41). One end of the threaded rod (42) is connected to the second motor (43) through a coupling. The threaded rod (42) is connected to the output end of the motor (43); a threaded sleeve (44) is provided on the threaded rod (42); a movable frame (45) is provided at the bottom of the threaded sleeve (44); a rotating frame (46) is provided inside the movable frame (45); a limiting slide groove is provided inside the movable frame (45); a limiting slide rail (47) is provided on the outer side of the rotating frame (46); the limiting slide rail (47) is slidably arranged inside the limiting slide groove; and the rotating line (11) is fixedly arranged to penetrate the rotating frame (46).

5. The snare for gastrointestinal polyp surgery with a multi-ring structure according to claim 1, characterized in that: The snare body (6) comprises a first snare wire (61) and a second snare wire (62), wherein the first snare wire (61) and the second snare wire (62) are both arranged in an annular structure, and the second snare wire (62) is arranged inside the first snare wire (61), and one end of the first snare wire (61) and the second snare wire (62) are connected to the insertion rod (7) through a plug sleeve (63).

6. The snare for gastrointestinal polyp surgery with a multi-ring structure according to claim 5, characterized in that: The first and second snare wires (61) and (62) are both integrally provided with a protrusion (64) at one end away from the plug sleeve (63), and the protrusion (64) is arranged in a semi-elliptical structure.

7. The snare for gastrointestinal polyp surgery with a multi-ring structure according to claim 1, characterized in that: The end of the connecting seat (8) away from the rotating seat (3) is arranged in a V-shaped structure, and the outer surface of the circumference of the connecting seat (8) close to the rotating seat (3) is provided with scale lines.

8. The snare for gastrointestinal polyp surgery with a multi-ring structure according to claim 5, characterized in that: The end surfaces of the plug sleeve (63) and the insertion rod (7) are both arranged in an arc-shaped chamfered structure.

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