Duodenal papilla traction clip

Abstract

The present invention provides a duodenal papilla traction clip, comprising: a clip body, a connecting rod, a traction wire, an outer sheath tube and a handle. The clip body is connected to the head of the connecting rod and is located outside the head end of the outer sheath tube. The traction wire is placed inside the connecting rod, the head of the traction wire is connected to the clip body, the body of the connecting rod is located inside the outer sheath tube, the tail end of the connecting rod is connected to the handle, and the handle is connected to the tail of the outer sheath tube. The clip body is provided with a first limiting device and a second limiting device, the connecting rod is provided with a third limiting device, and the head of the outer sheath tube is provided with a fourth limiting device. The first limiting device, the second limiting device, the third limiting device and the fourth limiting device cooperate to limit the movement of the clip body. The present invention can be inserted through the biopsy channel of a duodenoscope, clamp the oral side tissue of the duodenal papilla, close the traction clip, and pull the duodenal papilla through the traction wire to straighten duodenal papillae of various shapes and courses, thereby increasing the success rate of intubation.

Description

Technical Field

[0001] The present invention relates to the technical field of minimally invasive surgical instruments, and particularly, to a duodenal papilla traction clip. Background Art

[0002] Endoscopic retrograde cholangiopancreatography (ERCP) is an important method for treating hepatobiliary and pancreatic diseases such as common bile duct stones, obstructive jaundice, acute cholangitis, and acute pancreatitis using a duodenoscope, and has the advantages of less trauma, quick recovery, and strong repeatability. Successful selective bile duct or pancreatic duct intubation is the first step of an ERCP operation and the key to the success of the operation. If the intubation is unsuccessful, operations such as papillosphincterotomy, stone extraction, and stent placement cannot be continued, which means the failure of the ERCP operation and even induces complications such as acute pancreatitis, acute cholangitis, and acute cholecystitis.

[0003] Previously, a contrast catheter was generally used for intubation, with a relatively low success rate and a relatively high complication rate. Currently, for most selective intubations, an arc-shaped papillosphincterotomy knife with a guide wire is used for intubation. However, there are still many difficult intubation cases. The main reasons are that various factors affect the morphological structure and course of the bile outflow tract, pancreatic juice outflow tract, and common bile and pancreatic outflow tract, including: 1. There are significant individual differences in the morphological structure of the duodenal papilla, such as the papilla being too long, hypertrophic, atrophic, sclerotic, stenotic, edematous, etc. The bile outflow tract, pancreatic juice outflow tract, and common bile and pancreatic outflow tract are of different lengths, widths, and depths, and the angle between the bile outflow tract and the pancreatic juice outflow tract is of different sizes; 2. The position of the duodenal papilla is affected by a peri-papillary diverticulum, with an intra-diverticular papilla, a para-diverticular papilla, or a papilla between two or more diverticula, resulting in the bile outflow tract, pancreatic juice outflow tract, and common bile and pancreatic outflow tract not being in a theoretical straight line but having a certain curvature and even one or more turns; 3. The opening position of the duodenal papilla varies greatly. Generally, the papilla opening faces the 5 o'clock position under the duodenoscope, but it can also face various directions between the 3 o'clock and 9 o'clock positions. In some patients affected by a duodenal diverticulum, it is even difficult to directly observe the papilla opening; 4. Whether using a contrast catheter or an arc knife with a guide wire for intubation, when performing retrograde bile duct or pancreatic duct intubation from the papillosphincter opening, the papillosphincter will be squeezed, resulting in the bending of the bile outflow tract, pancreatic juice outflow tract, and common bile and pancreatic outflow tract, or increasing the bending angle of the outflow tract itself, further increasing the intubation difficulty.

[0004] For patients with difficult bile duct intubation in the above situation, the current methods include: 1. Using a needle knife to cut the bile and pancreatic common outflow tract or bile outflow tract, shortening the bile outflow tract and pancreatic juice outflow tract, thereby increasing the success rate of intubation, but also increasing the incidence of complications such as bile leakage, duodenal perforation, and acute pancreatitis, and even endangering the patient's life; 2. Using endoscopic hemostatic clips to pull the papilla out of the diverticulum, or fix the papillary sphincter on the duodenal folds, although the success rate of intubation is improved, the operation is difficult and the improvement is not obvious. Because the shape of the bile and pancreatic juice outflow tract is difficult to accurately determine, there is a possibility of clamping the outflow tract during the use of endoscopic clips, which increases the difficulty of intubation and even leads to postoperative obstructive jaundice and acute pancreatitis. Summary of the invention

[0005] According to the above-mentioned use of a needle knife to cut the bile and pancreatic common outflow tract or bile outflow tract, shorten the bile outflow tract and pancreatic juice outflow tract, thereby increasing the success rate of intubation, but also increasing the incidence of complications such as bile leakage, duodenal perforation, acute pancreatitis, and even endangering the patient's life; using an endoscopic hemostatic clamp to pull the papilla out of the diverticulum, or fixing the papillary sphincter on the duodenal fold, although the success rate of intubation is improved, the operation is difficult and the improvement is not obvious; because the shape of the bile and pancreatic juice outflow tract is difficult to accurately determine, there is a possibility of clamping the outflow tract during the clamping process using an endoscopic clamp, increasing the difficulty of intubation, and even causing the occurrence of postoperative obstructive jaundice and acute pancreatitis. A duodenal papilla traction clamp is provided. The present invention mainly uses the metal clip of the clamp body to bite the mucosa near the opening of the duodenal papilla, so as to adjust the position and shape of the papilla by pulling the traction line externally, and realize the limitation of the movement of the clamp body through multiple limiting structures.

[0006] The technical means adopted by the present invention are as follows:

[0007] A duodenal papilla traction clamp comprises: a clamp body, a connecting rod, a traction line, an outer sheath and a handle, wherein the clamp body is connected to the connecting rod head and is located outside the head end of the outer sheath, the traction line is placed inside the connecting rod, the head of the traction line is connected to the clamp body, the main body of the connecting rod is located inside the outer sheath, the tail end of the connecting rod is connected to the handle, and the handle is connected to the tail of the outer sheath; a first limiting device and a second limiting device are provided on the clamp body, a third limiting device is provided on the connecting rod, and a fourth limiting device is provided on the head of the outer sheath, and the first limiting device, the second limiting device, the third limiting device and the fourth limiting device cooperate to limit the movement of the clamp body.

[0008] Furthermore, the clamp body includes two clamps, a push-pull member I, a connector and a clamp barrel, the tail ends of the two clamps are connected to the push-pull member I, the push-pull member I is connected to the head end of the connecting rod through the connector, the push-pull member I and the connector are located inside the clamp barrel, the inside of the clamp barrel is communicated with the inside of the outer sheath tube, and the clamp barrel is located outside the head end of the outer sheath tube, and the head of the traction line is connected to the connector;

[0009] The first limiting device includes a limiting structure I and a limiting structure II. The limiting structure I is arranged on the inner wall of the head of the clamping cylinder and contacts the outer walls of the two clamping pieces, and is used for limiting the opening and closing of the two clamping pieces; the limiting structure II is arranged on the inner wall of the body of the clamping cylinder, and the push-pull member I is located between the limiting structure I and the limiting structure II. When the two clamping pieces move towards the inside of the clamping cylinder, the push-pull member I contacts the limiting structure II, and is used for limiting the movement of the two clamping pieces.

[0010] Further, the second limiting device is a limiting structure III provided on the inner wall of the tail of the clamping cylinder; the third limiting device includes a limiting structure VI and an inner core. The limiting structure VI is arranged on the outer wall of the head of the connecting rod, and the inner core is sleeved on the outer wall of the connecting rod and is located on the tail side of the limiting structure VI; the inner wall of the body of the inner core is concave, and a limiting structure IV and a limiting structure V are respectively provided at the head end and the tail end; the fourth limiting device includes a limiting structure VII and a limiting structure VIII, and the limiting structure VII and the limiting structure VIII are arranged at intervals on the inner wall of the head pipe section of the outer sheath tube;

[0011] When the limiting structure VI moves towards the tail direction, it contacts the limiting structure IV, and the limiting structure IV is used for limiting the movement of the limiting structure VI;

[0012] The limiting structure IV is located between the limiting structure II and the limiting structure VII and moves between the limiting structure II and the limiting structure VII, and the limiting structure III and the limiting structure VII are used for limiting the movement of the limiting structure IV;

[0013] The limiting structure V is located between the limiting structure VII and the limiting structure VIII and moves between the limiting structure VII and the limiting structure VIII, and the limiting structure VII and the limiting structure VIII are used for limiting the movement of the limiting structure V.

[0014] Further, the two clamping pieces are a clamping piece I and a clamping piece II, both of which are metal clamping pieces and are symmetrically arranged; each clamping piece includes a first clamping rod, a second clamping rod and a clamping part which are connected in sequence. The first clamping rod and the second clamping rod are bent and connected, the tail end of the first clamping rod is rotatably connected with the push-pull member I, the clamping part is in a clamping piece structure, and the clamping piece structure and the head end of the second clamping rod are bent and connected.

[0015] Further, the clamping cylinder is a single-channel tube, the limiting structure I is in a triangular structure that tapers from head to tail, the limiting structure II is in a cylindrical convex structure, and the push-pull member I is in a cylindrical convex structure.

[0016] Further, the inner core is a single-channel tube, the limiting structure III is in a triangular structure that tapers from tail to head and has an elastic compression function.

[0017] Further, the head of the connecting rod is a single-channel tube, the tail is a metal rod, and the limiting structure VI is in a cylindrical convex structure.

[0018] Furthermore, the outer sheath tube is a single-channel tube, the tube wall of the body is spiral-shaped and has a bending function; the limiting structure VII and the limiting structure VIII are columnar protruding structures.

[0019] Furthermore, the handle includes a sliding handle and a connecting handle, the middle of the sliding handle is a single-channel tube I, the head of the sliding handle is connected to the tail of the outer sheath tube, the tail of the sliding handle is connected to the connecting handle, and the connecting rod passes through the single-channel tube I and is connected to the connecting handle.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The duodenal papilla traction clamp provided by the present invention is a special instrument for pulling the duodenal papilla. The metal clip is shorter and narrower and can only clamp the mucosa without damaging the submucosal muscles.

[0022] 2. The duodenal papilla traction clamp provided by the present invention can achieve the purpose of traction of the duodenal papilla by connecting a line after clamping the mucosa at the opening of the duodenal papilla. Compared with fixing the papilla to the nearby duodenal folds, the difficulty of operation is significantly reduced.

[0023] 3. The duodenal papilla traction clamp provided by the present invention can not only pull the duodenal papilla out of the diverticulum by tightening the traction line, but also pull the arc-shaped or cornered bile outflow tract, pancreatic juice outflow tract, and bile-pancreatic common outflow tract into a straight line, thereby reducing the difficulty of intubation.

[0024] 4. The duodenal papilla traction clamp provided by the present invention, when the traction line is tightened and then a contrast catheter or arcuate papilla sphincterotomy is used for intubation, the squeezing of the papilla by the contrast catheter or the sphincterotomy will not cause the bile outflow tract, pancreatic juice outflow tract, and bile-pancreatic common outflow tract to bend or turn.

[0025] In summary, the application of the technical solution of the present invention can solve the problem of using a needle knife to cut the bile and pancreatic common outflow tract or the bile outflow tract, shorten the bile outflow tract and the pancreatic juice outflow tract, and thus increase the success rate of intubation, but it also increases the incidence of complications such as bile leakage, duodenal perforation, and acute pancreatitis, and even endangers the patient's life; using endoscopic hemostatic clips to pull the papilla out of the diverticulum, or fixing the papillary sphincter on the duodenal fold, although it improves the success rate of intubation, the operation is difficult and the improvement is not obvious; because the shape of the bile and pancreatic juice outflow tracts is difficult to determine accurately, there is a possibility of clamping the outflow tract during the clamping process using endoscopic clips, which increases the difficulty of intubation and even leads to the occurrence of postoperative obstructive jaundice and acute pancreatitis.

[0026] Based on the above reasons, the present invention can be widely promoted in the fields of medicine and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of the present invention.

[0029] Figure 2 It is a schematic diagram of the traction clip of the present invention approaching full opening.

[0030] Figure 3 It is a schematic diagram of the traction clip of the present invention being in a semi-open state after being tightened.

[0031] Figure 4 It is a schematic diagram of the traction clip of the present invention being closed.

[0032] Figure 5 It is a schematic diagram of the clip body and the outer sheath tube of the present invention starting to separate.

[0033] Figure 6 It is a schematic diagram of the clip body and the traction wire remaining in the duodenoscope forceps channel after the outer sheath tube is withdrawn from the duodenoscope forceps channel of the present invention.

[0034] In the figure: 1. Clip body; 11. Clip piece Ⅰ; 12. Clip piece Ⅱ; 13. Pushing and pulling member Ⅰ; 14. Connecting body; 15. Clip cylinder; 151. Limiting structure Ⅰ; 152. Limiting structure Ⅱ; 153. Limiting structure Ⅲ; 2. Outer sheath tube; 21. Head tube section; 211. Limiting structure Ⅶ; 212. Limiting structure Ⅷ; 22. Body tube section; 3. Handle; 4. Inner core; 41. Limiting structure Ⅳ; 42. Limiting structure Ⅴ; 5. Link; 51. Limiting structure Ⅵ; 6. Traction wire. Detailed implementation manners

[0035] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail the present invention.

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0038] Unless otherwise specifically stated, the relative arrangements, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present invention. The orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0040] For ease of description, spatial relative terms, such as "above", "on top of", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is inverted, the device described as "above" or "on top of" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0041] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without further statement, the above terms have no special meaning, and thus should not be construed as limiting the scope of protection of the present invention.

[0042] To solve the defects existing in the prior art and combine the disadvantages of difficult intubation in different surgical procedures, such as Figures 1-6 As shown, the present invention provides a duodenal papilla traction clip, comprising: a clip body 1, a connecting rod 5, a traction wire 6, an outer sheath tube 2, and a handle 3. The clip body 1 is connected to the head of the connecting rod 5 and is located outside the head end of the outer sheath tube 2. The traction wire 6 is placed inside the connecting rod 5. The head of the traction wire 6 is connected to the clip body 1. The body of the connecting rod 5 is located inside the outer sheath tube 2. The tail end of the connecting rod 5 is connected to the handle 3. The handle 3 is connected to the tail of the outer sheath tube 2. The clip body 1 is provided with a first limiting device and a second limiting device. The connecting rod 5 is provided with a third limiting device. The head of the outer sheath tube 2 is provided with a fourth limiting device. The first limiting device, the second limiting device, the third limiting device, and the fourth limiting device cooperate to limit the movement of the clip body 1.

[0043] In this embodiment, the clip body 1 includes two clip pieces, a pusher / puller Ⅰ 13, a connecting body 14, and a clip cylinder 15. The tail ends of the two clip pieces are connected to the pusher / puller Ⅰ 13. The pusher / puller Ⅰ 13 is connected to the head end of the connecting rod 5 through the connecting body 14. The pusher / puller Ⅰ 13 and the connecting body 14 are located inside the clip cylinder 15. The inside of the clip cylinder 15 communicates with the inside of the outer sheath tube 2, and the clip cylinder 15 is located outside the head end of the outer sheath tube 2. The head of the traction wire 6 is connected to the connecting body 14.

[0044] The first limiting device includes a limiting structure I 151 and a limiting structure II 152. The limiting structure I 151 is arranged on the inner wall of the head of the clamping cylinder 15 and contacts the outer walls of the two clamping pieces, and is used to limit the opening and closing of the two clamping pieces (when the two clamping pieces move towards the inside of the clamping cylinder 15, the limiting structure I 151 presses the two clamping pieces to gradually close the two clamping pieces); the limiting structure II 152 is arranged on the inner wall of the body of the clamping cylinder 15, and the pushing and pulling member I 13 is located between the limiting structure I 151 and the limiting structure II 152. When the two clamping pieces move towards the inside of the clamping cylinder 15, the pushing and pulling member I 13 contacts the limiting structure II 152 and is used to limit the movement of the two clamping pieces.

[0045] In this embodiment, the second limiting device is a limiting structure III 153 arranged on the inner wall of the tail of the clamping cylinder 15; the third limiting device includes a limiting structure VI 51 and an inner core 4. The limiting structure VI 51 is arranged on the outer wall of the head of the connecting rod 5, and the inner core 4 is sleeved on the outer wall of the connecting rod 5 and is located on the tail side of the limiting structure VI 51; the tube wall of the body of the inner core 4 is concave, and a limiting structure IV 41 and a limiting structure V 42 are respectively arranged at the head end and the tail end; the fourth limiting device includes a limiting structure VII 211 and a limiting structure VIII 212, and the limiting structure VII 211 and the limiting structure VIII 212 are arranged at intervals on the inner wall of the head pipe section 21 of the outer sheath tube 2; the concave body tube wall of the inner core 4 is used to accommodate the limiting structure III 153 and the limiting structure VII 211;

[0046] When the limiting structure VI 51 moves towards the tail direction, it contacts the limiting structure IV 41, and the limiting structure IV 41 is used to limit the movement of the limiting structure VI 51;

[0047] The limiting structure IV 41 is located between the limiting structure II 152 and the limiting structure VII 211 and moves between the limiting structure II 152 and the limiting structure VII 211. The limiting structure III 153 and the limiting structure VII 211 are used to limit the movement of the limiting structure IV 41;

[0048] The limiting structure V 42 is located between the limiting structure VII 211 and the limiting structure VIII 212 and moves between the limiting structure VII 211 and the limiting structure VIII 212. The limiting structure VII 211 and the limiting structure VIII 212 are used to limit the movement of the limiting structure V 42.

[0049] In this embodiment, the two clamping pieces are clamping piece Ⅰ 11 and clamping piece Ⅱ 12, both of which are metal clamping pieces and are symmetrically arranged; each clamping piece includes a first clamping rod, a second clamping rod and a clamping part connected in sequence. The first clamping rod and the second clamping rod are bent and connected. The tail end of the first clamping rod is rotatably connected to the pushing and pulling piece Ⅰ 13. The clamping part has a clamping piece structure, and the clamping piece structure and the head end of the second clamping rod are bent and connected. When the two clamping pieces gradually move into the clamping cylinder 15, the limiting structure Ⅵ 51 contacts the first clamping rod and the second clamping rod successively. When the two clamping pieces move to the limit position, the inner inclined surface of the limiting structure Ⅵ 51 matches the outer wall of the second clamping rod.

[0050] In this embodiment, the clamping cylinder 15 is a single-channel tube. The limiting structure Ⅰ 151 has a triangular structure that tapers from head to tail. The limiting structure Ⅱ 152 has a cylindrical convex structure. The pushing and pulling piece Ⅰ 13 has a cylindrical convex structure.

[0051] In this embodiment, the inner core 4 is a single-channel tube. The limiting structure Ⅲ 153 has a triangular structure (a triangular removable structure) that tapers from tail to head and has an elastic compression function. When the inner core 4 moves towards the tail direction, the limiting structure Ⅳ 41 presses on the limiting structure Ⅲ 153 to move. During this process, the limiting structure Ⅲ 153 is gradually compressed to allow the limiting structure Ⅳ 41 to pass through.

[0052] In this embodiment, the head of the connecting rod 5 is a single-channel tube and the tail is a metal rod. The limiting structure Ⅵ 51 has a cylindrical convex structure. A traction wire 6 passes through the connecting rod 5.

[0053] In this embodiment, the outer sheath tube 2 is a single-channel tube. The wall of the body tube section 22 is spiral and can be bent (i.e., has a bending function); the limiting structure Ⅶ 211 and the limiting structure Ⅷ 212 have a cylindrical convex structure.

[0054] In this embodiment, the handle 3 includes a sliding handle and a connecting handle. The middle of the sliding handle is a single-channel tube Ⅰ. The head of the sliding handle is connected to the tail of the outer sheath tube 2, and the tail of the sliding handle is connected to the connecting handle. The connecting rod 5 passes through the single-channel tube Ⅰ and is connected to the connecting handle (the connecting handle is connected to the connecting rod through the above single-channel tube Ⅰ).

[0055] When the position of the duodenal papilla is not good or intubation is difficult, tighten the duodenal papilla traction clip to close the metal piece at the head end. Insert the duodenal papilla traction clip through the biopsy channel of the duodenoscope, release the duodenal papilla traction clip, and the metal piece at the head end will open. Adjust the positions of the duodenoscope and the duodenal papilla traction clip so that the metal piece at the head end of the duodenal papilla traction clip is close to the opening of the duodenal papilla. Tighten the duodenal papilla traction clip and bite the mucosa near the opening of the duodenal papilla. Continue to tighten the duodenal papilla traction clip until the clip body separates from the outer sheath tube, and withdraw the outer sheath tube through the biopsy channel of the duodenoscope, leaving only the traction wire in the biopsy channel of the duodenoscope. Adjust the position and shape of the papilla by pulling the traction wire outward. Fix the traction wire and insert a contrast catheter or a papillosphincterotome through the biopsy channel of the duodenoscope for intubation.

[0056] After successful intubation, operations such as contrast imaging, incision, dilation, stone extraction, and catheter placement can be completed. Finally, under tightened traction, separate the clip body from the mucosa of the duodenal papilla sphincter and withdraw it through the biopsy channel of the duodenoscope.

[0057] The present invention can be inserted through the biopsy channel of the duodenoscope, clamp the tissue on the oral side of the duodenal papilla, close the traction clip, and straighten duodenal papillae of various shapes and configurations by pulling the traction wire, increasing the success rate of intubation.

[0058] The present invention is a special instrument for pulling the duodenal papilla. The metal clip is shorter and narrower, and can only clamp the mucosa without damaging the submucosal muscle.

[0059] After the present invention clamps the mucosa at the opening of the duodenal papilla, the purpose of pulling the duodenal papilla can be achieved by connecting the wire. Compared with fixing the papilla to the nearby duodenal folds, the operation difficulty is significantly reduced.

[0060] By tightening the traction wire, the present invention can not only pull the duodenal papilla out of the diverticulum, but also straighten the bile outflow tract, pancreatic juice outflow tract, and common bile-pancreatic outflow tract with arcs or corners, reducing the intubation difficulty.

[0061] When the present invention tightens the traction wire and then uses a contrast catheter or an arcuate papillosphincterotome for intubation, the squeezing of the contrast catheter or the cutting knife on the papilla will not cause the bile outflow tract, pancreatic juice outflow tract, or common bile-pancreatic outflow tract to bend or form corners.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A duodenal papilla traction clip, characterized in that, Comprising: A clamping body (1), a connecting rod (5), a traction wire (6), an outer sheath tube (2) and a handle (3). The clamping body (1) is connected to the head of the connecting rod (5) and is located outside the head end of the outer sheath tube (2). The traction wire (6) is placed inside the connecting rod (5). The head of the traction wire (6) is connected to the clamping body (1). The body of the connecting rod (5) is located inside the outer sheath tube (2). The tail end of the connecting rod (5) is connected to the handle (3). The handle (3) is connected to the tail of the outer sheath tube (2). The clamping body (1) is provided with a first limiting device and a second limiting device. The connecting rod (5) is provided with a third limiting device. The head of the outer sheath tube (2) is provided with a fourth limiting device. The first limiting device, the second limiting device, the third limiting device and the fourth limiting device cooperate to limit the movement of the clamping body (1). The clamping body (1) includes two clamping pieces, a pusher member I (13), a connecting body (14) and a clamping cylinder (15). The tail ends of the two clamping pieces are connected to the pusher member I (13). The pusher member I (13) is connected to the head end of the connecting rod (5) through the connecting body (14). The pusher member I (13) and the connecting body (14) are located inside the clamping cylinder (15). The inside of the clamping cylinder (15) is communicated with the inside of the outer sheath tube (2). And the clamping cylinder (15) is located outside the head end of the outer sheath tube (2). The head of the traction wire (6) is connected to the connecting body (14). The first limiting device includes a limiting structure I (151) and a limiting structure II (152). The limiting structure I (151) is arranged on the inner wall of the head of the clamping cylinder (15) and contacts the outer walls of the two clamping pieces to limit the opening and closing of the two clamping pieces. The limiting structure II (152) is arranged on the inner wall of the body of the clamping cylinder (15). The pusher member I (13) is located between the limiting structure I (151) and the limiting structure II (152). When the two clamping pieces move into the clamping cylinder (15), the pusher member I (13) contacts the limiting structure II (152) to limit the movement of the two clamping pieces. The second limiting device is a limiting structure III (153) arranged on the inner wall of the tail of the clamping cylinder (15). The third limiting device includes a limiting structure VI (51) and an inner core (4). The limiting structure VI (51) is arranged on the outer wall of the head of the connecting rod (5). The inner core (4) is sleeved on the outer wall of the connecting rod (5) and is located on the tail side of the limiting structure VI (51). The tube wall of the body of the inner core (4) is concave, and a limiting structure IV (41) and a limiting structure V (42) are respectively arranged at the head end and the tail end. The fourth limiting device includes a limiting structure VII (211) and a limiting structure VIII (212). The limiting structure VII (211) and the limiting structure VIII (212) are arranged at intervals on the inner wall of the head pipe section (21) of the outer sheath tube (2). When the limiting structure VI (51) moves towards the tail direction, it contacts the limiting structure IV (41). The limiting structure IV (41) is used to limit the movement of the limiting structure VI (51). The limiting structure Ⅳ (41) is located between the limiting structure Ⅱ (152) and the limiting structure Ⅶ (211), and moves between the limiting structure Ⅱ (152) and the limiting structure Ⅶ (211). The limiting structure Ⅲ (153) and the limiting structure Ⅶ (211) are used to limit the movement of the limiting structure Ⅳ (41). The limiting structure Ⅴ (42) is located between the limiting structure Ⅶ (211) and the limiting structure Ⅷ (212), and moves between the limiting structure Ⅶ (211) and the limiting structure Ⅷ (212). The limiting structure Ⅶ (211) and the limiting structure Ⅷ (212) are used to limit the movement of the limiting structure Ⅴ (42). The clamping cylinder (15) is a single-channel tube. The limiting structure Ⅰ (151) is a triangular structure that tapers from head to tail. The limiting structure Ⅱ (152) is a cylindrical convex structure. The push-pull member Ⅰ (13) is a cylindrical convex structure.

2. The duodenal papilla traction clip according to claim 1, characterized in that The two clamping pieces are the clamping piece Ⅰ (11) and the clamping piece Ⅱ (12), both of which are metal clamping pieces and are symmetrically arranged. Each clamping piece includes a first clamping rod, a second clamping rod, and a clamping portion that are connected in sequence. The first clamping rod and the second clamping rod are bent and connected. The tail end of the first clamping rod is rotatably connected to the push-pull member Ⅰ (13). The clamping portion is a clamping piece structure, and the clamping piece structure and the head end of the second clamping rod are bent and connected.

3. The duodenal papilla traction clip according to claim 1, wherein The inner core (4) is a single-channel tube. The limiting structure Ⅲ (153) is a triangular structure that tapers from tail to head and has an elastic compression function.

4. The duodenal papilla traction clip according to claim 1, characterized in that, The head of the connecting rod (5) is a single-channel tube, the tail is a metal rod, and the limiting structure Ⅵ (51) is a cylindrical convex structure.

5. The duodenal papilla traction clip according to claim 1, wherein The outer sheath tube (2) is a single-channel tube. The tube wall of the body tube section (22) is spiral and has a bending function. The limiting structure Ⅶ (211) and the limiting structure Ⅷ (212) are cylindrical convex structures.

6. The duodenal papilla traction clip according to claim 1, wherein The handle (3) includes a sliding handle and a connecting handle. The middle of the sliding handle is a single-channel tube Ⅰ. The head of the sliding handle is connected to the tail of the outer sheath tube (2), and the tail of the sliding handle is connected to the connecting handle. The connecting rod (5) passes through the single-channel tube Ⅰ and is connected to the connecting handle.

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