Anti-displacement pancreatic duct stent

Abstract

The utility model discloses an anti-displacement pancreatic duct support, and relates to the technical field of medical instruments. The anti-displacement pancreatic duct support comprises a traction ball, a flow guide structure is arranged on the outer side of the traction ball, an anti-displacement structure is arranged at the other end of the flow guide structure, and a support structure is arranged on the other side of the anti-displacement structure; according to the anti-displacement pancreatic duct stent, the anti-displacement structure is arranged, the flow guide structure and the stent structure can be connected through the two connecting joints, and then the anti-displacement pancreatic duct stent is sewn and fixed to the jejunum mucous membrane surface of a pancreatic anastomotic stoma through an absorbable suture in cooperation with a suture hole in the fixing blocking piece; the function of reinforcing the anastomotic stoma and reducing erosion of the anastomotic stoma by digestive juice is achieved, the situation that the stent accidentally falls off in the pancreatic duct is avoided, the stability of the stent is improved, and meanwhile the use efficiency of the stent is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an anti-displacement pancreatic duct stent. Background Art

[0002] Pancreaticoduodenectomy is one of the most difficult operations in hepatobiliary and pancreatic surgery. In recent years, with the continuous improvement of medical level, the mortality rate of pancreaticoduodenectomy has decreased, but the incidence of postoperative complications remains high. Patients often need a second operation due to poor pancreatic drainage and pancreatic leakage. Therefore, whether the anastomosis between the pancreatic duct and the jejunum is smooth is crucial and is the key to the success of the operation. The role of the pancreatic duct stent is to prevent the collapse of the anastomosis on the one hand, and to drain the pancreatic juice on the other hand.

[0003] After searching, it is proposed in the absorbable anti-falling and anti-leakage pancreatic duct stent with patent publication number CN218305778U that "the utility model provides a stent body, a drainage tube, a first umbrella-shaped valve, a second umbrella-shaped valve, a drainage hole and an anti-slip convex block. The first umbrella-shaped valve, the second umbrella-shaped valve and the anti-slip convex block can effectively fix the stent, avoid the stent from accidentally falling off in the pancreatic duct, and improve the use efficiency of the pancreatic duct stent. The first umbrella-shaped valve and the second umbrella-shaped valve are slowly degradable bioabsorbable materials. After being absorbed by the human body, the valve loses its supporting function, and the stent can automatically fall off into the jejunum and then be discharged from the body. The first umbrella-shaped valve and the second umbrella-shaped valve can block the pancreatic duct, so that the pancreatic fluid can be directly drained to the jejunum through the drainage hole, which is conducive to improving the healing speed of the anastomosis, thereby reducing the incidence of postoperative pancreatic leakage."

[0004] The above scheme still has certain shortcomings in actual use. The pancreatic duct stent uses a degradable first umbrella-shaped valve and a second umbrella-shaped valve to fix the stent body to the inner side of the pancreatic duct, but the umbrella-shaped valve and the pancreatic duct are only overlapped, which greatly reduces the fixing effect of the pancreatic duct stent. Utility Model Content

[0005] The utility model provides an anti-displacement pancreatic duct stent to solve the problems in the background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions: an anti-displacement pancreatic duct stent, comprising a traction ball, a flow guide structure is arranged on the outside of the traction ball, an anti-displacement structure is arranged on the other end of the flow guide structure, and a stent structure is arranged on the other side of the anti-displacement structure;

[0007] The anti-displacement structure comprises a fixed baffle, a first connecting joint and a second connecting joint are respectively arranged on two sides of the fixed baffle, and a suture hole is opened inside the fixed baffle.

[0008] Furthermore, the diameter of the traction ball is smaller than the diameter of the fixed baffle, and the traction ball is a medical silicone rubber ball.

[0009] Furthermore, the fixed baffle is connected to the inner wall of the pancreas through suture holes and absorbable sutures, and the fixed baffle is a polylactic acid disc.

[0010] Furthermore, the guide structure includes a drainage tube, a surface of which is provided with drainage holes, and an end of the drainage tube away from the traction ball is connected to the fixed baffle through a second connecting joint.

[0011] Furthermore, the support structure includes a support tube, the end of the support tube is fixedly installed with a connecting plug, the support tube is connected to a fixed baffle through the connecting plug and a first connecting joint, the inner wall of the connecting plug is fixedly connected with a connecting arc block, the inner wall of the connecting arc block is provided with a connecting groove, and the openings of the two connecting grooves are opposite, and the outer side of the support tube is fixedly installed with a connecting arc plate, and the connecting arc plate and the connecting arc block are staggered on the inner and outer sides of the support tube.

[0012] Furthermore, a scale bar is provided on the outer side of the support tube.

[0013] Compared with the prior art, the utility model provides an anti-displacement pancreatic duct stent, which has the following beneficial effects:

[0014] The anti-displacement pancreatic duct stent is provided with an anti-displacement structure, and can connect the diversion structure and the stent structure by using two connecting joints, and then suture and fix the stent to the jejunal mucosal surface of the pancreatic anastomosis through absorbable sutures in cooperation with the suture holes on the fixed baffle, thereby reinforcing the anastomosis and reducing the erosion of the anastomosis by digestive fluid, avoiding the accidental fall-off of the stent in the pancreatic duct, improving the stability of the stent, and at the same time facilitating the improvement of the use efficiency of the stent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the anti-displacement structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the support structure of the utility model.

[0019] In the figure: 1. traction ball; 2. guide structure; 201. drainage tube; 202. drainage hole; 3. anti-displacement structure; 301. first connecting joint; 302. fixed baffle; 303. suture hole; 304. second connecting joint; 4. bracket structure; 401. bracket tube; 402. connecting plug; 403. connecting arc block; 404. connecting groove; 405. connecting arc plate; 5. scale bar. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model discloses an anti-displacement pancreatic duct stent, comprising a traction ball 1, a flow guide structure 2 is arranged on the outside of the traction ball 1, an anti-displacement structure 3 is arranged on the other end of the flow guide structure 2, and a stent structure 4 is arranged on the other side of the anti-displacement structure 3; the flow guide structure 2 comprises a drainage tube 201, a drainage hole 202 is opened on the surface of the drainage tube 201, and the end of the drainage tube 201 away from the traction ball 1 is connected to a fixed baffle 302 through a second connecting joint 304; the anti-displacement structure 3 comprises a fixed baffle 302, and both sides of the fixed baffle 302 are divided into A first connecting joint 301 and a second connecting joint 304 are separately provided, and a suture hole 303 is opened inside the fixed baffle 302; by providing the anti-displacement structure 3, the two connecting joints can be used to connect the diversion structure 2 and the support structure 4, and then the suture holes 303 on the fixed baffle 302 are used to suture and fix it to the jejunal mucosal surface of the pancreatic anastomosis through absorbable sutures, which plays a role in reinforcing the anastomosis and reducing the erosion of the anastomosis by digestive fluid, avoiding the accidental fall-off of the stent in the pancreatic duct, improving the stability of the stent, and at the same time helping to improve the use efficiency of the stent.

[0022] The support structure 4 includes a support tube 401, the end of which is fixedly installed with a connecting plug 402, the support tube 401 is connected to the fixed baffle 302 through the connecting plug 402 and the first connecting joint 301, the inner wall of the connecting plug 402 is fixedly connected with a connecting arc block 403, the inner wall of the connecting arc block 403 is provided with a connecting groove 404, and the openings of the two connecting grooves 404 are opposite, the outer side of the support tube 401 is fixedly installed with a connecting arc plate 405, and the connecting arc plate 405 and the connecting arc block 403 are staggered on the inner and outer sides of the support tube 401.

[0023] Specifically, the diameter of the traction ball 1 is smaller than the diameter of the fixed baffle 302 , and the traction ball 1 is a medical silicone rubber ball.

[0024] In this embodiment, medical silicone rubber has good biocompatibility, is non-irritating to human tissue, non-toxic, has no allergic reaction, and has very little body rejection reaction; it has good physical and chemical properties, can maintain its original elasticity and softness during contact with body fluids and tissues, and is not degraded. It is a fairly stable inert substance that can withstand high temperatures, can be sterilized, is easy to process and shape, and is easy to process and carve, and is easy to use. The human body has no obvious rejection reaction to medical silicone, and the use of silicone can reduce secondary damage to patients.

[0025] Specifically, the fixed baffle 302 is connected to the inner wall of the pancreas through suture holes 303 and absorbable sutures, and the fixed baffle 302 is a polylactic acid disc.

[0026] In this embodiment, polylactic acid is an environmentally friendly biomaterial with high strength, high modulus and good molding processability. PLA, also known as polylactide, is a polyester polymer formed by the polymerization of multiple lactic acid monomer molecules. There are four main degradation mechanisms of PLA, namely in vivo degradation, ultraviolet degradation, thermal degradation, and microbial degradation. The degradation of polymer materials in the body can be caused by the breakage of chemical bonds caused by the separate or combined action of enzymes or other chemical factors. For PLA polyester polymers, the ester bond breaks and causes degradation, and its metabolic final products are water and carbon dioxide, so it has no toxic side effects on the human body and is very safe to use. Therefore, polylactic acid has been used in many fields such as medicine and pharmacy;

[0027] Made of polylactic acid, it has better biocompatibility and can be completely degraded in the human body within 3 months after implantation. At the same time, this polymer material has good biocompatibility, absorbable and degradable properties, and good mechanical processing properties. Its Young's modulus is much higher than that of traditional silicone materials. It is often used in 3D rapid printing technology. After hot-melt molding, the material properties will not change significantly, and it has good heating stability and tensile resistance.

[0028] Specifically, a scale bar 5 is provided on the outer side of the support tube 401 .

[0029] In this embodiment, the scale bar 5 disposed on the outside of the stent tube 401 can indicate the length of the stent tube 401 and can accurately display the length inserted into the pancreatic duct.

[0030] When in use, first measure the required length of the bracket tube 401, so that multiple bracket tubes 401 are spliced ​​to form a spliced ​​bracket tube 401, first overlap the two adjacent bracket tubes 401, and insert the connecting arc plate 405 on the outer side of the left bracket tube 401 into the connecting plug 402 of the right bracket tube 401. Since the setting positions of the connecting arc blocks 403 and the connecting arc plates 405 arranged inside and outside the bracket tube 401 are staggered, by rotating the right bracket tube 401, the connecting plug 402 of the right bracket tube 401 drives the connecting arc block 403 to rotate, and the connecting arc block 403 inserts the connecting arc plate 405 into itself through the connecting groove 404, so that the connecting arc block 403 and the connecting arc plate 405 are completed in a splicing state, and the two adjacent bracket tubes 401 are completed. Combination;

[0031] Then, the traction ball 1 is inserted into the intestinal cavity, and the operator feels the position of the traction ball 1 with his fingers outside the intestinal wall, pinches the traction ball 1 and pulls the stent tube 401 to the distal part of the pancreaticojejunostomy through the traction ball 1, so as to straighten the stent tube 401 and avoid curling and folding. After the operation is completed, if there is no abnormal reaction, the pancreatic duct stent does not need to be removed and can be left in place for a long time.

[0032] Then, the suture holes on the fixed baffle 302 are sutured and fixed to the jejunal mucosal surface of the pancreatic anastomosis through absorbable sutures, so that the fixed baffle 302 needs to completely fit the jejunal mucosal surface. After several months, the stent completes the drainage operation, and the polylactic acid material of the anti-displacement structure 3 is gradually degraded, causing the stent structure 4 to fall off and enter the intestine and be discharged from the body.

[0033] In summary, the anti-displacement pancreatic duct stent, by setting the anti-displacement structure 3, can connect the diversion structure 2 and the stent structure 4 by using two connecting joints, and then cooperate with the suture holes 303 on the fixed baffle 302 to suture and fix it to the jejunal mucosal surface of the pancreatic anastomosis through absorbable sutures, which plays a role in strengthening the anastomosis and reducing the erosion of the anastomosis by digestive fluid, avoiding the accidental fall-off of the stent in the pancreatic duct, improving the stability of the stent, and at the same time helping to improve the use efficiency of the stent.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pancreatic duct stent for preventing displacement, comprising a traction ball (1), characterized in that: A flow guide structure (2) is arranged on the outside of the traction ball (1), an anti-displacement structure (3) is arranged on the other end of the flow guide structure (2), and a support structure (4) is arranged on the other side of the anti-displacement structure (3); The anti-displacement structure (3) comprises a fixed baffle (302), a first connection joint (301) and a second connection joint (304) are respectively provided on two sides of the fixed baffle (302), and a suture hole (303) is provided inside the fixed baffle (302).

2. The anti-displacement pancreatic duct stent according to claim 1, characterized in that: The diameter of the traction ball (1) is smaller than the diameter of the fixed baffle (302), and the traction ball (1) is a medical silicone rubber ball.

3. The anti-displacement pancreatic duct stent according to claim 1, characterized in that: The fixed baffle (302) is connected to the inner wall of the pancreas through suture holes (303) and absorbable sutures, and the fixed baffle (302) is a polylactic acid disc.

4. The anti-displacement pancreatic duct stent according to claim 1, characterized in that: The flow guiding structure (2) comprises a flow guiding tube (201), a flow guiding hole (202) being provided on the surface of the flow guiding tube (201), and an end of the flow guiding tube (201) away from the traction ball (1) being connected to the fixed baffle (302) via a second connecting joint (304).

5. The anti-displacement pancreatic duct stent according to claim 1, characterized in that: The support structure (4) comprises a support tube (401), a connecting plug (402) being fixedly mounted on the end of the support tube (401), the support tube (401) being connected to the fixed baffle (302) via the connecting plug (402) and the first connecting joint (301), a connecting arc block (403) being fixedly connected to the inner wall of the connecting plug (402), a connecting groove (404) being provided on the inner wall of the connecting arc block (403), and the openings of the two connecting grooves (404) being opposite, a connecting arc plate (405) being fixedly mounted on the outer side of the support tube (401), and the connecting arc plate (405) and the connecting arc block (403) being staggeredly arranged on the inner and outer sides of the support tube (401).

6. The anti-displacement pancreatic duct stent according to claim 5, characterized in that: A scale bar (5) is provided on the outer side of the support tube (401).

Images