阅读说明：本技术 一种肝胆胰外科用具有定位结构的胆道支架 (Biliary tract stent with positioning structure for hepatobiliary pancreas surgery ) 是由 叶军锋 王中峰 王崇 于 2021-04-08 设计创作，主要内容包括：本发明涉及一种肝胆胰外科用具有定位结构的胆道支架,包括胆道支架主体和限位机构,所述胆道支架主体的外壁两侧开设有卡孔,所述限位机构设置于胆道支架主体的外壁四周,所述胆道支架主体的外壁四周开设有气孔,所述胆道支架主体的外壁一侧设置有连接外壁,与现有技术相比,本发明的有益效果如下：倒刺作为其限位机构的主要结构,使其斜倒刺的朝向趋于一侧,利用其斜倒刺的瓣状,来将胆道支架主体卡合在胆道的内壁上,来将其进行固定住,避免其胆道支架主体卡在使用的过程中出现松动,而在斜倒刺的内侧上设置有弧槽,通过弧槽可以保证其表面的光滑性,减少其斜倒刺对胆道内壁的磨损,保证其胆道的完整性,不会损伤胆道壁。(The invention relates to a biliary tract stent with a positioning structure for hepatobiliary pancreas surgery, which comprises a biliary tract stent main body and a limiting mechanism, wherein clamping holes are formed in two sides of the outer wall of the biliary tract stent main body, the limiting mechanism is arranged on the periphery of the outer wall of the biliary tract stent main body, air holes are formed in the periphery of the outer wall of the biliary tract stent main body, and a connecting outer wall is arranged on one side of the outer wall of the biliary tract stent main body. The barb is as its stop gear's primary structure, the orientation that makes its oblique barb tends to one side, utilize the lamella form of its oblique barb, come to biliary tract support main part block on the inner wall of biliary tract, come to it to fix, avoid its biliary tract support main part card not hard up in-process that uses to appear, and be provided with the arc groove on the inboard of oblique barb, can guarantee the smoothness nature on its surface through the arc groove, reduce the wearing and tearing of its oblique barb to biliary tract inner wall, guarantee the integrality of its biliary tract, can not harm the biliary tract wall.)

1. The utility model provides a hepatobiliary pancreas surgery is with biliary tract support that has location structure, includes biliary tract support main part (1) and stop gear (2), its characterized in that: the biliary tract stent is characterized in that clamping holes (10) are formed in two sides of the outer wall of a biliary tract stent main body (1), limiting mechanisms (2) are arranged on the periphery of the outer wall of the biliary tract stent main body (1), air holes (3) are formed in the periphery of the outer wall of the biliary tract stent main body (1), one side of the outer wall of the biliary tract stent main body (1) is provided with a connecting outer wall (7), a clamping belt (5) is arranged on one side of the outer wall of the connecting outer wall (7), inner wall grooves (4) in the biliary tract stent main body (1) are formed in the periphery of the inner portion of the stent, tabling grooves (8) are formed in one side of the inner wall of the stent (4), a belt groove (9) is formed in the periphery of the inner wall of the tabling grooves (8), and flow stopping valves (6) are arranged on the periphery of the inner wall of the stent (4).

2. The biliary stent with a positioning structure for hepatobiliary pancreas surgery according to claim 1, wherein: the biliary tract stent main body (1) and the stent inner wall groove (4) are distributed in a concentric circle shape, and the biliary tract stent main body (1) is distributed in a cylindrical shape.

3. The biliary stent with a positioning structure for hepatobiliary pancreas surgery according to claim 1, wherein: the biliary tract stent main body (1) forms a detachable structure by connecting the outer wall (7) and the embedding groove (8), and the biliary tract stent main body (1) are mutually matched in size.

4. The biliary stent with a positioning structure for hepatobiliary pancreas surgery according to claim 1, wherein: the biliary tract stent main body (1) comprises a plastic outer wall (101), a nano silver layer (102) and a buffer layer (103), wherein the nano silver layer (102) is arranged on the periphery of the inner wall of the plastic outer wall (101), and the buffer layer (103) is arranged on the periphery of the inner wall of the nano silver layer (102).

5. The biliary stent with a positioning structure for hepatobiliary pancreas surgery according to claim 4, wherein: the plastic outer wall (101) and the nano silver layer (102) are concentrically distributed with the buffer layer (103), and the plastic outer wall (101) and the nano silver layer (102) are mutually attached with the buffer layer (103).

6. The biliary stent with a positioning structure for hepatobiliary pancreas surgery according to claim 1, wherein: stop gear (2) are including oblique barb (201) and arc groove (202), and the inboard one end of oblique barb (201) is provided with arc groove (202).

7. The biliary stent with a positioning structure for hepatobiliary pancreas surgery according to claim 6, wherein: the inclined barbs (201) are distributed uniformly along the central axis of the biliary tract stent main body (1), and the inclined barbs (201) are associated with the arc grooves (202).

8. The biliary stent with a positioning structure for hepatobiliary pancreas surgery according to claim 1, wherein: the size of the clamping belt (5) is matched with that of the belt groove (9), and the clamping belt (5) is attached to the belt groove (9).

9. The biliary stent with a positioning structure for hepatobiliary pancreas surgery according to claim 1, wherein: the flow stopping valves (6) are uniformly distributed along the central axis of the biliary tract stent main body (1), and six rows of the flow stopping valves (6) are arranged.

Technical Field

The invention relates to the technical field of hepatobiliary pancreas surgery, in particular to a biliary tract stent with a positioning structure for hepatobiliary pancreas surgery.

Background

The biliary tract stent is a technological scheme widely used in medical treatment, especially for hepatobiliary pancreas surgery, can relieve the state of illness of malignant biliary tract obstruction patient effectively, to the malignant biliary tract obstruction patient who can't be operated and resected radically, it is the best preferred method to place biliary tract stent under the endoscope, its trauma is small, complication is few, through the installation of biliary tract stent, can relieve biliary tract obstruction rapidly, reduce biliary tract pressure, unobstructed drainage effects, thus make patient's state of illness relieve rapidly, control infection, make except that the gallbladder is under the assistance of biliary tract stent, can make it give play to the normal human circulation operation, can also according to the different situation in the art, choose different types of biliary tract stent tube, in order to benefit to the healing of biliary tract, reduce biliary tract complication after liver transplantation.

Present biliary tract support is all through the knitting netted support that the alloy was made, place it on the inner wall of biliary tract, utilize its biliary tract support to support its biliary tract inner wall, guarantee keeping unobstructed of biliary tract inner chamber, make it produce and last gentle radial expanding force, act on the biliary tract inner wall, make narrow position resume unobstructed, but biliary tract support is under long-term use, can cause the inner wall of biliary tract to reing in the trace, lead to its biliary tract inner wall to appear the tetanus even, the harm of infecting appears, need regularly change it, and to some special biliary tract, can make the easy gliding phenomenon of biliary tract support appear, and in biliary tract support normal operating time, the condition of bile flow backward flow takes place easily, thereby influence the internal circulation system of whole human body.

Disclosure of Invention

The invention aims to provide a biliary tract stent with a positioning structure for hepatobiliary pancreas surgery, which solves the problems that the prior biliary tract stent proposed in the background technology is a woven mesh stent made of alloy and placed on the inner wall of a biliary tract, and the biliary tract stent is used for supporting the inner wall of the biliary tract to ensure that the inner cavity of the biliary tract is kept smooth, so that the biliary tract stent generates continuous and soft radial expansion force to act on the inner wall of the biliary tract to ensure that a narrow part is recovered smoothly, however, the biliary tract stent can cause strangulation to the inner wall of the biliary tract under long-term use, even cause the inner wall of the biliary tract to be tetanus and cause infection harm, and the biliary tract stent needs to be replaced regularly, and for some special biliary tracts, the biliary tract stent is easy to slide, and when the biliary tract stent works normally, the situation of bile backflow is easy to occur, thereby affecting the internal circulation system of the whole human body.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a hepatobiliary pancreas surgery is with biliary tract support that has location structure, includes biliary tract support main part and stop gear, the card hole has been seted up to the outer wall both sides of biliary tract support main part, stop gear sets up around the outer wall of biliary tract support main part, the outer wall of biliary tract support main part is seted up porosely all around, outer wall one side of biliary tract support main part is provided with connects the outer wall, and connects outer wall one side and be provided with the clamping belt, the inside of biliary tract support main part is provided with wall groove in the support all around, the gomphosis groove has been seted up to inner wall one side of wall groove in the support, and the inner wall in gomphosis groove has seted up the trough of belt all around, the inner wall in wall groove in the support is provided with the stagnant flow valve all around.

Preferably, the biliary tract stent main body and the inner wall groove of the stent are distributed in a concentric circle shape, and the biliary tract stent main body is distributed in a cylindrical shape.

Preferably, the biliary tract stent main body forms a detachable structure by connecting the outer wall and the embedding groove, and the biliary tract stent main body are matched with each other in size.

Preferably, the biliary tract stent main body comprises a plastic outer wall, a nano silver layer and a buffer layer, the nano silver layer is arranged on the periphery of the inner wall of the plastic outer wall, and the buffer layer is arranged on the periphery of the inner wall of the nano silver layer.

Preferably, the plastic outer wall and the nano silver layer are concentrically distributed with the buffer layer, and the plastic outer wall and the nano silver layer are mutually attached to the buffer layer.

Preferably, stop gear includes oblique barb and arc groove, and the inboard one end of oblique barb is provided with the arc groove.

Preferably, the inclined barbs are distributed uniformly along the central axis of the biliary tract stent main body, and the inclined barbs are associated with the arc grooves.

Preferably, the clamping belt and the belt groove are matched with each other in size, and the clamping belt and the belt groove are attached to each other.

Preferably, the flow stopping valves are uniformly distributed along the central axis of the biliary tract stent main body, and the flow stopping valves are provided with six rows.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention adopts the arrangement of the biliary tract stent main body and the stent inner wall groove, the biliary tract stent main body and the stent inner wall groove are distributed in concentric circles, the whole biliary tract stent main body and the stent inner wall groove are used as the main basic structure of the biliary tract stent, the whole appearance is cylindrical, the inner wall of the bracket is provided with a bracket inner wall groove, the inner part of the biliary tract bracket main body is hollow, when the biliary tract stent main body is installed for use, the circular outer wall of the biliary tract stent main body can be better attached to the biliary tract, so as to ensure the tightness of the joint of the biliary tract stent main body and the biliary tract, ensure the stability of the structure of the biliary tract stent main body, thereby guarantee placing of biliary tract support main part stably, reduce the not hard up possibility of its biliary tract support main part, what make bile and other materials can accomplish passes from support inner wall inslot side, guarantees the normal use of its biliary tract support main part.

2. According to the biliary tract stent, the biliary tract stent main body, the connecting outer wall and the embedding groove are arranged, the biliary tract stent main body forms a detachable structure through the connecting outer wall and the embedding groove, the connecting outer wall matched with the biliary tract stent main body is fixed on one side of the outer wall of the biliary tract stent main body, the embedding groove is formed in the other end of the outer wall of the stent main body, when a plurality of biliary tract stent main bodies are disassembled and assembled, the connecting outer wall and the embedding groove are embedded and connected in a concentric circle mode, the disassembling and assembling stability is guaranteed, the clamping hole is formed in the outer wall, and the connecting position of the biliary tract stent can be reinforced through the sterile screw, so that the stability of the whole biliary tract stent is guaranteed.

3. The biliary tract stent comprises a biliary tract stent main body, a plastic outer wall, a nano silver layer and a buffer layer, wherein the biliary tract stent main body comprises the plastic outer wall, the nano silver layer and the buffer layer, the plastic outer wall, the nano silver layer and the buffer layer are concentrically distributed, the plastic outer wall, the nano silver layer and the buffer layer are mutually attached, the whole biliary tract stent main body is formed by fixing three layers of structures of the plastic outer wall, the nano silver layer and the buffer layer, the buffer layer is arranged at the innermost side of the biliary tract stent main body, the buffer layer can generate continuous and soft radial expansion force to act on the inner wall of the biliary tract, so that the narrow part can be recovered smoothly, a good buffer effect can be achieved, the stability of the flowing of substances in the biliary tract stent main body is ensured, the damage of the biliary tract is reduced, the nano silver layer is adopted in the biliary tract stent main body, and the nano silver layer has good biocompatibility and flexibility so that the shape of the biliary tract stent main body can be changed in a certain range, have fine ductility, have good hyperelasticity under the body temperature, can fluctuate along with normal biliary tract wriggling, make the biliary tract both keep unobstructed and do not have uncomfortable sensation, and be provided with the plastic outer wall in the left outside of its biliary tract support main part, the plastic outer wall has good corrosion resistance and intensity, protects biliary tract support main part to prolong its biliary tract support's life.

4. The invention arranges the limit mechanism, the inclined barbs and the arc grooves, the limit mechanism comprises the inclined barbs and the arc grooves, the inclined barbs are uniformly distributed along the central axis of the biliary tract stent main body, and the inclined barbs are associated with the arc grooves, the periphery of the outer wall of the biliary tract stent main body is provided with a limit mechanism which is uniformly distributed and comprises an inclined barb and an arc groove, the inclined barbs are used as the main structure of the limiting mechanism, so that the orientation of the inclined barbs tends to one side, the biliary tract stent main body is clamped on the inner wall of the biliary tract by utilizing the petal shape of the inclined barbs to fix the biliary tract stent main body, the biliary tract stent main body is prevented from being loosened in the use process, and be provided with the arc groove on the inboard of oblique barb, can guarantee the smoothness nature on its surface through the arc groove, reduce the wearing and tearing of its oblique barb to the biliary tract inner wall, guarantee the integrality of its biliary tract, can not harm the biliary tract wall.

5. The clamping belt, the embedded groove and the belt groove are arranged, the clamping belt and the belt groove are matched in size, the clamping belt and the belt groove are attached to each other, the fixed clamping belt is arranged on the outer wall of the connecting outer wall and has good elasticity, the belt groove is formed in the inner side of the embedded groove, when the biliary tract stent main body and the biliary tract stent main body are disassembled and assembled, the clamping belt is slightly deformed, the clamping belt is reset and clamped on the inner side of the belt groove, the connecting part of the biliary tract stent main body and the biliary tract stent main body is reinforced, the sealing performance of the connecting part of the biliary tract stent main body and the biliary tract stent main body is ensured, the gap of the connecting part of the biliary tract stent main body is reduced, bile and other substances can pass through the inner side of the inner wall groove of the stent, and the normal use of the biliary tract stent main body is ensured.

Drawings

FIG. 1 is a schematic perspective view of a biliary tract stent with a positioning structure for use in a hepatobiliary-pancreatic surgery according to the present invention;

FIG. 2 is a schematic diagram illustrating the internal structure of a biliary tract stent with a positioning structure for use in a hepatobiliary pancreas surgery according to the present invention;

FIG. 3 is a schematic diagram of the inner side structure of a biliary tract stent with a positioning structure for a hepatobiliary pancreas surgery according to the present invention;

FIG. 4 is a schematic diagram of the internal structure of the biliary stent main body of the biliary stent with a positioning structure for a hepatobiliary pancreas surgery according to the present invention;

fig. 5 is a schematic view of a biliary tract stent with a positioning structure for hepatobiliary pancreas surgery, which is partially enlarged at a position A in fig. 1.

In the figure: 1. a biliary stent main body; 101. a plastic outer wall; 102. a nano silver layer; 103. a buffer layer; 2. a limiting mechanism; 201. oblique barbs; 202. an arc groove; 3. air holes; 4. inner wall grooves of the bracket; 5. a snap belt; 6. a flow stop valve; 7. connecting the outer wall; 8. a fitting groove; 9. a belt groove is formed; 10. and (6) clamping the hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a hepatobiliary pancreas surgery is with biliary tract support that has location structure, including biliary tract support main part 1, stop gear 2, gas pocket 3, support inner wall groove 4, the clamping area 5, the stagnant flow valve 6, connect outer wall 7, gomphosis groove 8, trough of belt 9 and card hole 10, the card hole 10 has been seted up to biliary tract support main part 1's outer wall both sides, stop gear 2 sets up around the outer wall of biliary tract support main part 1, gas pocket 3 has been seted up all around to biliary tract support main part 1's outer wall, biliary tract support main part 1's outer wall one side is provided with connects outer wall 7, and the outer wall one side of connecting outer wall 7 is provided with clamping area 5, biliary tract support main part 1's inside is provided with support inner wall groove 4 all around, gomphosis groove 8 has been seted up to support inner wall one side of inner wall groove 4, and the trough of belt 9 has been seted up all around to the inner wall of gomphosis groove 8, the inner wall of support inner wall groove 4 is provided with stagnant flow valve 6 all around.

In the invention:

the biliary tract stent main body 1 and the stent inner wall groove 4 are concentrically distributed, the biliary tract stent main body 1 is cylindrically distributed, the whole biliary tract stent main body 1 and the stent inner wall groove 4 are used as the main basic structure of the biliary tract stent, the whole appearance is cylindrical, a bracket inner wall groove 4 is arranged in the bracket, so that the inner part of the biliary tract bracket main body 1 is hollow, when the biliary tract stent main body 1 is installed for use, the circular outer wall of the biliary tract stent main body 1 can be better attached to the biliary tract, so as to ensure the tightness of the joint of the biliary tract stent main body 1 and the biliary tract, ensure the structural stability of the biliary tract stent main body 1, thereby ensuring the stable placement of the biliary tract stent main body 1, reducing the possibility of looseness of the biliary tract stent main body 1, leading bile and other substances to pass through the inner side of the inner wall groove 4 of the stent and ensuring the normal use of the biliary tract stent main body 1.

Biliary tract stent main part 1 constitutes detachable construction through connecting between outer wall 7 and the gomphosis groove 8, and the size is mutually supported between biliary tract stent main part 1 and the biliary tract stent main part 1, outer wall one side at biliary tract stent main part 1 is fixed with matched with and connects outer wall 7, and the outer wall other end at stent main part 1 begins to have gomphosis groove 8, when carrying out the dismouting with a plurality of biliary tract stent main parts 1, make and connect outer wall 7 and gomphosis groove 8 and carry out the gomphosis, adopt the mode of concentric circles to carry out the gomphosis and connect, guarantee the stability of its dismouting, and card hole 10 has been seted up in outer wall department, can consolidate its junction through aseptic screw, guarantee whole firm of accomplishing biliary tract stent.

The biliary tract stent main body 1 comprises a plastic outer wall 101, a nano silver layer 102 and a buffer layer 103, the nano silver layer 102 is arranged on the periphery of the inner wall of the plastic outer wall 101, the buffer layer 103 is arranged on the periphery of the inner wall of the nano silver layer 102, the plastic outer wall 101, the nano silver layer 102 and the buffer layer 103 are distributed in a concentric circle shape, the plastic outer wall 101, the nano silver layer 102 and the buffer layer 103 are mutually attached, the whole biliary tract stent main body 1 is formed by fixing three layers of structures of the plastic outer wall 101, the nano silver layer 102 and the buffer layer 103, the buffer layer 103 is arranged on the innermost side of the biliary tract stent main body, the buffer layer 103 can generate continuous and soft radial expansion force, the buffer layer 103 can smoothly act on the inner wall of the biliary tract to recover the narrow part, the buffer effect can be well achieved, the stability of the flowing of substances in the biliary tract can be ensured, the damage of the biliary tract can be reduced, the nano silver layer 102 is adopted in the main body, and the nano silver layer 102 has good biocompatibility and flexibility, make it can change the shape in certain extent, have fine ductility, have good hyperelasticity under the body temperature, can fluctuate along with normal biliary tract wriggling, make the biliary tract both keep unobstructed and not have uncomfortable sensation, and be provided with plastic outer wall 101 in the left outside of its biliary tract support main part 1, plastic outer wall 101 has good corrosion resistance and intensity, come to protect biliary tract support main part 1 to prolong its biliary tract support's life.

The limiting mechanism 2 comprises an inclined barb 201 and an arc groove 202, the arc groove 202 is arranged at one end of the inner side of the inclined barb 201, the inclined barb 201 is uniformly distributed along the central axis of the biliary tract stent main body 1, the inclined barb 201 is associated with the arc groove 202, the limiting mechanism 2 is uniformly distributed on the periphery of the outer wall of the biliary tract stent main body 1, the limiting mechanism 2 comprises the inclined barb 201 and the arc groove 202, the inclined barb 201 is used as the main structure of the limiting mechanism 2 to enable the orientation of the inclined barb 201 to tend to one side, the segment shape of the inclined barb 201 is utilized to clamp the biliary tract stent main body 1 on the inner wall of the biliary tract to fix the biliary tract stent to prevent the biliary tract stent main body 1 from loosening in the using process, the arc groove 202 is arranged on the inner side of the inclined barb 201, the smoothness of the surface of the biliary tract stent main body can be ensured through the arc groove 202, and the abrasion of the inclined barb 201 on the biliary tract inner wall can be reduced, the integrity of the biliary tract is ensured, and the wall of the biliary tract is not damaged.

The sizes of the clamping belt 5 and the belt groove 9 are matched with each other, the clamping belt 5 and the belt groove 9 are attached to each other, the fixed clamping belt 5 is arranged on the outer wall of the connecting outer wall 7, the clamping belt 5 has good elasticity, the belt groove 9 is formed in the inner side of the embedding groove 8, when the biliary tract stent main body 1 and the biliary tract stent main body 1 are disassembled and assembled, the clamping belt 5 is slightly deformed, the clamping belt 5 is reset and clamped in the inner side of the belt groove 9, the joint of the biliary tract stent main body 1 and the biliary tract stent main body 1 is reinforced, the sealing performance of the joint of the biliary tract stent main body 1 and the biliary tract stent main body 1 is ensured, the gap of the joint of the biliary tract stent main body 1 is reduced, bile and other substances can pass through the inner side of the inner wall groove 4 of the stent, and the normal use of the biliary tract stent main body 1 is ensured.

Stop valve 6 and be the even form distribution along the axis department of biliary tract support main part 1, and stop valve 6 is provided with six, be provided with evenly distributed's stop valve 6 on the inner wall of biliary tract support main part 1, this direction of stop valve 6 is unanimous with the orientation of oblique barb 201, when recycling its oblique barb 201 with biliary tract support main part 1 fix, bile can carry out the landing along its big cambered surface that stops valve 6, and the slope form of stop valve 6, can guarantee that its bile is unexpected down when the backward flow, can be stopped by its little cambered surface department that stops valve 6, reduce the backward flow of its bile and other materials, guarantee the stability of its human inner loop structure.

The working principle of the embodiment is as follows: the biliary tract stent with the positioning structure for the hepatobiliary pancreas surgery is characterized in that when in use, an operator needs to select biliary tract stent tubes of different types according to different conditions in the surgery to facilitate healing of biliary tracts and reduce biliary tract complications after liver transplantation to disassemble and assemble the biliary tract stent main body 1 to reach the required size length, in the disassembling and assembling process, the biliary tract stent main body 1 is attached to the biliary tract stent main body 1 to ensure that the connecting outer wall 7 at one side of the biliary tract stent main body 1 is embedded with the embedding groove 8 at the inner side of the other biliary tract stent main body 1 to be connected in a concentric circle mode, the clamping belt 5 is slightly deformed at the attaching position of the connecting position to reset and clamp the clamping belt 5 at the inner side of the groove 9 to reinforce the connecting position, thereby ensuring the sealing performance of the connecting position of the biliary tract stent main body 1 and the biliary tract stent main body 1, the gap at the joint of the biliary tract stent main body 1 is reduced, bile and other substances can pass through the inner side of the inner wall groove 4 of the stent, the normal use of the biliary tract stent main body 1 is ensured, then the joint of the biliary tract stent main body is reinforced by aseptic screws to ensure the stability of the whole biliary tract stent is ensured, then the whole biliary tract stent is placed on the inner wall of the biliary tract to ensure that the limiting mechanism 2 is attached to the inner wall of the biliary tract, the oblique barb 201 in the limiting mechanism 2 is opposite to the flow direction of the bile and the substances, the valve shape of the oblique barb 201 is utilized to clamp the biliary tract stent main body 1 on the inner wall of the biliary tract to fix the biliary tract stent, the biliary tract stent main body 1 is prevented from being loosened in the using process, the arc groove 202 is arranged on the inner side of the oblique barb 201, the smoothness of the surface can be ensured by the arc groove 202, and the abrasion of the oblique barb 201 on the inner wall of the biliary tract is reduced, the integrity of the biliary tract is guaranteed, the wall of the biliary tract is not damaged, when the biliary tract stent main body 1 works, the shape of the biliary tract stent main body can be changed within a certain range, the biliary tract stent main body has good ductility, has good hyperelasticity at body temperature, can fluctuate along with normal biliary tract peristalsis, and enables the biliary tract to keep smooth without uncomfortable feeling.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.