Biliary absorbable stent

Abstract

The present invention relates to the field of medical device technology, specifically to a bile duct absorbable stent, including a stent body, at least four main support rods are arranged equidistantly in a circular array in the stent body, and auxiliary rods in the same direction are arranged between adjacent main support rods, and the main support rods and the auxiliary rods are connected by an elastic frame that can be absorbed by the human body. The elastic frame, external connecting rods and arc-shaped frame in the bile duct absorbable stent proposed by the present invention are all made of absorbable materials, which will be gradually absorbed by the human body during use, thereby enhancing their own supporting function, so that the bile duct absorbable stent is gradually separated from the bile duct, and then falls off into the intestine, thereby effectively avoiding the problem that the bile duct stent cannot be smoothly removed from the bile duct or the bile duct stent made of traditional metal is easy to damage the bile duct when it is pulled out. Thereby solving the problem of the inconvenience of removing the existing bile duct stent, which can effectively reduce the patient's postoperative pain and improve the treatment effect.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a bile duct absorbable stent. Background Art

[0002] A biliary stent is a surgical device that is implanted in the bile duct to dilate the duct. By implanting a biliary stent, the diameter of the bile duct can be expanded to provide decompression support, drainage, and convenient injection of drugs into the bile duct. It also facilitates subsequent observation of bile conditions and postoperative cholangiography.

[0003] Since the biliary stent has the function of expanding the bile duct, it is easy to cause an inflammatory reaction in the human body and cannot be left in the human body for a long time. Therefore, the biliary stent needs to be removed after a certain period of implantation. At present, the most ideal way is that the structure on the biliary stent used to fix the biliary stent and the bile duct is gradually absorbed by the human body and loses its supporting function, so that the biliary stent can fall off from the bile duct by itself after a period of time due to its fixation. For example, the patent with application number CN201481599U and patent name "Regular Self-Detachable Biliary Stent" uses a thread that can be absorbed by the human body to fix the biliary stent to the bile duct. However, this method requires artificial use of a thread that can be absorbed by the human body to sew the biliary stent to the bile duct or gallbladder. Therefore, it can only be used in surgery on the gallbladder or bile duct, and is not suitable for inserting the biliary stent directly into the bile duct. Another way is to use a metal braided biliary stent to directly insert into the bile duct through the duodenal papilla, and then the biliary stent is deployed and fixed in the bile duct by its own elastic force. However, the biliary stent cannot be absorbed by the human body due to its structure. When it needs to be removed, it can only be pulled out by surgical instruments. In addition, since this type of biliary stent is in very close contact with the bile duct after deployment, it is inevitable to cause damage to the bile duct during hard extraction. Therefore, it is difficult to meet existing usage needs.

[0004] Therefore, we need absorbable biliary stents to solve the problem of inconvenient removal of existing biliary stents, which can effectively reduce patients' postoperative pain and improve treatment effects. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of inconvenient removal of existing biliary stents. The present application provides an absorbable biliary stent that can effectively reduce the patient's postoperative pain and improve the treatment effect.

[0006] To achieve the above object, the present invention provides the following technical solution: a biliary absorbable stent, comprising:

[0007] A stent body, wherein at least four main support rods are arranged in a circumferential array at equal intervals, and auxiliary rods in the same direction are arranged between adjacent main support rods, and the main support rods and the auxiliary rods are connected by an elastic frame that can be absorbed by the human body;

[0008] An anti-slip device, the anti-slip device comprising an outer connecting rod that can be absorbed by the human body, and the outer connecting rod is connected to an end docking rod through an arc-shaped frame that can be absorbed by the human body, and the end docking rod is fixed to the end of the main support rod or the auxiliary rod;

[0009] An implantation device, which is inserted into the stent body and used to deliver the stent body into the bile duct for deployment, and the main support rod, the auxiliary rod and the end docking rod are provided with a fixing device for receiving the stent body and the anti-detachment device into the implantation device;

[0010] A docking device, the docking device includes an expanded docking sleeve fixed to the main support rod and retained in the duodenum, and the expanded docking sleeve is used for plugging and installing with external drainage or drug supply equipment.

[0011] Preferably, the anti-slip device is provided with a marker for facilitating scanning and observing the insertion position of the stent body through a CT device, and the marker is installed on the end docking rod or the arc frame.

[0012] Preferably, a solution receiving device for supplying solution is provided at the end of the main support, the solution receiving device includes a solution bag retained in the duodenum, and the solution bag is fixed to the main support rod through a docking port, an inner flow channel connected to the docking port is provided in the main support rod, and an outflow hole connected to the inner flow channel and used for spraying the solution in the inner flow channel toward the inner wall of the bile duct is provided on the main support rod, the solution bag can shrink and squeeze the solution inside itself into the inner flow channel, and a supporting device is provided on the outside of the solution bag for maintaining the shape of the solution bag and slowly dissolving the solution bag when its own supporting structure dissolves.

[0013] Preferably, the solution capsule is an annular structure, and an inner connector is provided inside the solution capsule, which is fixed at a symmetrical position with the inner wall of the solution capsule and improves the contraction ability of the solution capsule by shrinking itself.

[0014] Preferably, the supporting device includes at least two main annular frames for fixing the solution capsule, which are arranged in a circular array inside or outside the solution capsule, and auxiliary annular frames are alternately arranged between the main annular frames, which are arranged with the solution capsule and fix the solution capsule, and the main annular frames and the auxiliary annular frames are connected by an intermediate rod.

[0015] Preferably, the main annular frame and the auxiliary annular frame are both bonded and fixed by means of biological glue and solution capsules, and the main annular frame, the auxiliary annular frame and the middle rod are all made of materials that can be absorbed by the human body.

[0016] Preferably, a docking tube connected to the main support rod is fixedly installed on the flared docking sleeve, and the end of the docking tube is plugged and installed with the docking port through a docking joint that can be periodically detached.

[0017] Preferably, a mantle is provided on the stent body by bonding with biological glue, and the docking port is used to supply a solution between the mantle and the inner wall of the bile duct.

[0018] Preferably, the implant device includes an inner pull rod inserted into the stent body, and the inner pull rod is sleeved with an anti-slip push sleeve that rests on the docking device, the inner pull rod is provided with a matching slideway that is slidably installed with the fixing device, and the end of the inner pull rod is connected to a top entry head through an end connecting rod for easy insertion into the bile duct.

[0019] Preferably, the fixing device includes a connecting seat installed with the main support rod, auxiliary rod or end docking rod by bio-glue, and a sliding docking seat is provided at the bottom of the connecting seat, and a sliding groove is provided between the connecting seat and the sliding docking seat for sliding installation with a matching slide.

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

[0021] The elastic frame, the external connecting rod and the arc frame in the absorbable biliary stent proposed by the present invention are all made of absorbable materials, which will be gradually absorbed by the human body during use, thereby reducing its own supporting function, so that the absorbable biliary stent is gradually separated from the bile duct, and then falls off into the intestine, thereby effectively avoiding the problem that the biliary stent cannot be smoothly removed from the bile duct or the traditional metal biliary stent is easy to damage the bile duct when it is pulled out. Thus, the problem of inconvenient removal of the existing biliary stent is solved, which can effectively reduce the patient's postoperative pain and improve the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the installation of the support body, the anti-dropping device and the docking device of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the anti-falling device of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the docking device of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the implant device of the present invention;

[0027] Figure 6 It is a schematic diagram of the installation of the solution storage device and the support device of the present invention;

[0028] Figure 7 is a schematic cross-sectional view of the solution storage device of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the main body of the bracket of the present invention;

[0030] Fig. 9 It is a side view of the main body of the present invention.

[0031] In the figure: 1. stent body; 101. outflow hole; 102. main support rod; 103. auxiliary rod; 104. elastic frame; 105. inner flow channel; 2. implantation device; 201. anti-drop push sleeve; 202. inner pull rod; 203. matching slideway; 204. end connecting rod; 205. top entry head; 3. solution storage device; 301. solution capsule; 302. docking port; 303. inner connector; 4. support device; 401. main annular frame; 402. auxiliary annular frame; 403. middle rod; 5. anti-drop device; 501. outer connecting rod; 502. end docking rod; 503. arc frame; 6. docking device; 601. flared docking sleeve; 602. docking tube; 603. docking head; 7. fixing device; 701. connecting seat; 702. slide groove; 703. sliding docking seat; 8. marking body; 9. outer sheath. DETAILED DESCRIPTION

[0032] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit 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.

[0033] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0036] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 and Fig. 9 The present invention provides a bile duct absorbable stent, comprising a stent body 1, an anti-dropping device 5, an implantation device 2 and a docking device 6,

[0037] See also Figure 2 , Figure 8 and Fig. 9 At least four main support rods 102 are arranged in a circular array at equal intervals in the support body 1, and auxiliary rods 103 in the same direction are arranged between adjacent main support rods 102. The main support rods 102 and the auxiliary rods 103 are connected by an elastic frame 104 that can be absorbed by the human body. The elastic frame 104 is elastic and can be folded.

[0038] See also Figure 1 , Figure 2 and Figure 3 The anti-slip device 5 includes an external connecting rod 501 that can be absorbed by the human body, and the external connecting rod 501 is connected to the end docking rod 502 through an arc frame 503 that can be absorbed by the human body. The end docking rod 502 is fixed to the end of the main support rod 102 or the auxiliary rod 103. When the external connecting rod 501 and the arc frame 503 are absorbed by the human body, they will lose their fixing effect on the bile duct, thereby facilitating the dislodging of the stent body 1.

[0039] See also Figure 1 , Figure 2 and Figure 4The docking device 6 includes a flared docking sleeve 601 fixed to the main support rod 102 and retained in the duodenum, and the flared docking sleeve 601 is used for plugging and installing with an external drainage or drug supply device, and the docking device 6 and the main support rod 102 are bonded by biological glue.

[0040] See also Figure 1 , Figure 3 , Figure 5 , Figure 8 and Fig. 9The implantation device 2 is inserted into the stent body 1 and is used to deliver the stent body 1 into the bile duct for deployment, and the main support rod 102, the auxiliary rod 103 and the end docking rod 502 are provided with a fixing device 7 for receiving the stent body 1 and the anti-slip device 5 into the implantation device 2. The implantation device 2 includes an inner pull rod 202 inserted into the stent body 1, and the inner pull rod 202 is sleeved with an anti-slip push sleeve 201 that abuts against the docking device 6, the inner pull rod 202 is provided with a matching slide 203 that is slidably installed with the fixing device 7, and the end of the inner pull rod 202 is connected to a top entry head 205 that is convenient for insertion into the bile duct through an end connecting rod 204, and the fixing device 7 includes a main support rod 102, an auxiliary rod 103 or an end docking rod 502. The connecting seat 701 of the outer docking rod 502 is installed by bio-glue bonding, and a sliding docking seat 703 is arranged at the bottom of the connecting seat 701. A slide groove 702 is provided between the connecting seat 701 and the sliding docking seat 703, and the slide groove 702 is slidably installed with the matching slideway 203. Through the cooperation of the slide groove 702 and the matching slideway 203, the bracket body 1 and the anti-slip device 5 can be fixed on the inner pull rod 202 by the fixing device 7. Before the implantation operation, each fixing device 7 is slidably installed into the matching slideway 203 in sequence by the end connecting rod 204. At this time, the main support rod 102 and the auxiliary rod 103 will be firmly attached to the surface of the inner pull rod 202 under the fixation of the fixing device 7, which will also make the elastic frame 104 in The inner pull rod 202 is bent into a folded state, so that the stent body 1 and the anti-detachment device 5 can be stored in a folded state on the surface of the inner pull rod 202, so as to facilitate the insertion of the entire biliary absorbable stent into the human body. At the same time, the anti-detachment pushing sleeve 201 will also be against the surface of the docking device 6. When the biliary absorbable stent needs to be implanted into the bile duct, the implantation device 2 is inserted into the patient's duodenum through the patient's mouth with the assistance of an external instrument, and then the insertion head 205 is used to push it into the bile duct through the duodenal papilla. The end of the insertion head 205 can adopt a hemispherical structure to facilitate insertion into the bile duct, and then the inner pull rod 202 and the anti-detachment pushing sleeve 201 are continued to be pushed to put the biliary absorbable stent into the correct position of the bile duct. The insertion position can be The depth of the inner pull rod 202 inserted into the human body is used to judge, and different lengths of absorbable biliary stents can be selected according to the different locations of the bile duct lesions. At this time, the docking device 6 is left in the duodenum, and then the anti-detachment pushing sleeve 201 is continuously pushed so that the anti-detachment pushing sleeve 201 can squeeze the docking device 6 against the intestinal wall of the duodenum, thereby preventing the absorbable biliary stent from falling off, and then the inner pull rod 202 is pulled out along the anti-detachment pushing sleeve 201. At this time, since the absorbable biliary stent is pressed in the bile duct by the anti-detachment pushing sleeve 201 and cannot move, when the inner pull rod 202 is pulled out, the inner pull rod 202 will slide with each fixing device 7. When the fixing device 7 slides out of the inner matching slide 203 from the end connecting rod 204,The anti-drop device 5 will be opened under the elastic action of the external connecting rod 501, the end docking rod 502 and the arc frame 503 to form an outwardly expanding arc structure that is clamped in the bile duct to prevent the bile absorbable stent from falling out of the bile duct. At the same time, the main support rod 102 and the auxiliary rod 103 will also be deployed under the drive of the elastic frame 104 to support the inner wall of the bile duct, so that the bile duct can be expanded. Then, when all the fixing devices 7 slide out of the matching slide 203 from the end connecting rod 204, the bile absorbable stent can be deployed, and then the entire implant device 2 can be withdrawn from the patient's mouth.

[0041] When the biliary absorbable stent is implanted inside the bile duct, the bile duct is expanded, so that the bile, inflammatory substances or other impurities in the bile duct and gallbladder can be discharged from the expanded bile duct, and can also be inserted through the patient's mouth through an additional drainage tube or injection tube, and with the assistance of relevant medical equipment, it can be plugged into the expanded docking sleeve 601 of the docking device 6, and then the substances in the gallbladder or bile duct can be sucked out through the drainage tube, or the medicine can be injected into the bile duct and gallbladder through the injection tube, thereby effectively facilitating the cleaning and medication of the diseased area.

[0042] During the use of the absorbable biliary stent, since the elastic frame 104, the external connecting rod 501 and the arc frame 503 are all made of materials that can be absorbed by the human body, specifically, polylactic acid, polyhydroxybutyric acid, polyamide-6, polycaprolactone, starch, gelatin, medical magnesium alloy and the like can be selected according to the needs of performance, after long-term implantation in the bile duct, the elastic frame 104, the external connecting rod 501 and the arc frame 503 will gradually lose their elasticity, so that the absorbable biliary stent and the bile duct can no longer fit tightly together. At this time, since the docking device 6 is retained in the duodenum, when When the duodenum moves, it will squeeze the docking device 6, so that the remaining part of the bile duct absorbable stent is gradually pulled out of the bile duct, and then the remaining part of the bile duct absorbable stent will be discharged from the patient's body with feces. In addition, the corresponding medical device can be inserted through the patient's mouth manually, so as to pull out the remaining part of the bile duct absorbable stent from the bile duct by clamping the docking device 6. Further, the bile duct absorbable stent can also be made of suitable human absorbable materials, so that the entire bile duct absorbable stent can be absorbed by the normal metabolism of the human body. This solves the problem of inconvenient removal of existing bile duct stents, can effectively reduce the patient's postoperative pain and improve the treatment effect.

[0043] Example 2: Please refer to Figure 1 , Figure 2 , Figure 6 , Figure 7 , Figure 8 and Fig. 9On the basis of the first embodiment, a solution receiving device 3 for supplying a solution is provided at the end of the main support 1, and the solution receiving device 3 includes a solution capsule 301 retained in the duodenum, and the solution capsule 301 is fixed to the main support rod 102 through a docking port 302, an inner flow channel 105 connected to the docking port 302 is provided in the main support rod 102, and an outflow hole 101 connected to the inner flow channel 105 and used to spray the solution in the inner flow channel 105 toward the inner wall of the bile duct is opened on the main support rod 102, the solution capsule 301 can shrink and squeeze the solution in itself into the inner flow channel 105, and the outside of the solution capsule 301 is provided with a device for maintaining the shape of the solution capsule 301 and allowing the solution capsule 301 to slowly dissolve when its own support structure dissolves. The dissolving support device 4, the solution capsule 301 is an annular structure, and the interior of the solution capsule 301 is provided with an inner connector 303 which is fixed at a symmetrical position with the inner wall of the solution capsule 301 and improves the contraction ability of the solution capsule 301 by its own contraction, the support device 4 includes at least two main annular frames 401 which are sleeved in a circular array inside or outside the solution capsule 301 for fixing the solution capsule 301, and auxiliary annular frames 402 which are sleeved with the solution capsule 301 and fix the solution capsule 301 are alternately arranged between the main annular frames 401, and the main annular frames 401 and the auxiliary annular frames 402 are connected by an intermediate rod 403, and the main annular frames 401 and the auxiliary annular frames 402 are both bonded and fixed to the solution capsule 301 by biological glue, and the support device 4 includes at least two main annular frames 401 which are sleeved inside or outside the solution capsule 301 in a circular array for fixing the solution capsule 301, and the auxiliary annular frames 402 are alternately arranged between the main annular frames 401 and are sleeved with the solution capsule 301 and fix the solution capsule 301, and the main annular frames 401 and the auxiliary annular frames 402 are connected by an intermediate rod 403, and the main annular frames 401 and the auxiliary annular frames 402 are both bonded and fixed to the solution capsule 301 by biological glue, The main annular frame 401, the auxiliary annular frame 402 and the middle rod 403 in the supporting device 4 can form an annular frame that maintains its own structure. When the biological glue on the solution capsule 301 used to bond the main annular frame 401 and the auxiliary annular frame 402 is absorbed by the human body, the solution capsule 301 will squeeze the solution contained in itself into the inner flow channel 105 under its own elastic force and the contraction force of the inner connector 303, and then spray it onto the inner wall of the bile duct through the outflow hole 101. Different solutions can be set in the solution capsule 301 according to different needs. When the inner wall of the bile duct needs to be treated with drugs, the amount of biological glue used on the main annular frame 401 and the auxiliary annular frame 402 is different. When the biological glue is absorbed, the solution on the auxiliary annular frame 402 will be absorbed first. After the solution is absorbed, the auxiliary annular frame 402 can be separated from the solution capsule 301, while the solution on the main annular frame 401 will take more time to absorb and separate the main annular frame 401 from the solution capsule 301. In this way, the solution in the solution capsule 301 will be squeezed out gradually and slowly over time, rather than squeezed out in a short time, so as to continuously deliver the corresponding solution to the inner wall of the bile duct, and avoid the solution being directly washed into the duodenum by bile or inflammatory substances after a one-time delivery. The solution capsule 301 can hold the corresponding solution, and when it is necessary to accelerate the dissolution of the entire bile duct absorbable stent by adding an additional solvent, the corresponding dissolving agent can be placed in the solution capsule 301, so as to facilitate use according to different situations.When the absorbable bile duct stent falls off from the bile duct, the remaining parts of the solution receiving device 3 and the supporting device 4 will also fall off together. Since the solution receiving device 3 and the supporting device 4 are placed in the duodenum, the peristalsis of the duodenum will cause the solution receiving device 3 and the supporting device 4 to be squeezed. Therefore, the size of the solution receiving device 3 and the supporting device 4 should be as small as possible and a variety of models should be maintained for selection according to the need for retention. In addition, when using the stent, the patient can take appropriate drugs to reduce intestinal peristalsis and avoid eating. This further solves the problem of the inconvenience of removing the existing biliary stent, and can effectively reduce the patient's postoperative pain and improve the treatment effect.

[0044] Example 3: Please refer to Figure 2 , Figure 6 and Figure 7 On the basis of the second embodiment, the main annular frame 401, the auxiliary annular frame 402 and the intermediate rod 403 are all made of materials that can be absorbed by the human body. In this way, it can be ensured that the support device 4 can also be absorbed by the human body and gradually cannot maintain its own structure. In addition, due to the different amounts of materials used in the main annular frame 401 and the auxiliary annular frame 402, the length of time for the two to lose their own structure when absorbed by the human body is different. Similarly, the solution storage device 3 can also continuously supply the solution in stages. The support device 4 can be made of starch, gelatin, polycaprolactone or medical magnesium alloy according to the needs of performance. It further solves the problem of inconvenient removal of the existing biliary stent, which can effectively reduce the pain of patients after surgery and improve the treatment effect.

[0045] Example 4: Please refer to Figure Figure 1 , Figure 2 and Figure 4 On the basis of the third embodiment, a docking tube 602 connected to the main support rod 102 is fixedly installed on the flared docking sleeve 601, and the end of the docking tube 602 is plugged and installed with the docking port 302 through a docking joint 603 that can be periodically detached. Since the solution receiving device 3 and the support device 4 need to be retained in the duodenum, and the solution receiving device 3 and the support device 4 have a certain volume, they are not suitable for long-term suspension on the stent body 1. Therefore, the use of a docking joint 603 that can be periodically detached can make the solution receiving device 3 and the support device 4 fall off into the intestine at a predetermined time and be discharged with feces. The docking joint 603 can be made of a material that can be absorbed by the human body, so that it breaks quickly after being absorbed by the human body to form a periodically detached structure. It further solves the problem of inconvenient removal of the existing biliary stent, and can effectively reduce the pain of patients after surgery and improve the treatment effect.

[0046] Example 5: Please refer to Figure 1On the basis of the fourth embodiment, a mantle 9 is provided on the stent body 1 by means of biological glue bonding, and the docking port 302 is used to supply solution between the mantle 9 and the inner wall of the bile duct. The mantle 9 itself is made of a material that can be absorbed by the human body. The mantle 9 can be made of materials such as polylactic acid, polyhydroxybutyric acid, starch, etc. The mantle 9 mainly realizes the isolation function. Through the isolation of the mantle 9, the solution delivered by the solution capsule 301 can stay between the inner wall of the bile duct and the mantle 9 for a long time, avoiding the solution from being quickly flushed into the duodenum by bile and inflammatory substances, so that the solution can play the greatest role, which can effectively reduce the patient's postoperative pain and improve the treatment effect.

[0047] Embodiment 6: Please refer to 1. On the basis of Embodiment 5, a marker 8 is provided on the anti-detachment device 5 for facilitating scanning and observing the insertion position of the stent body 1 through CT equipment, and the marker 8 is installed on the end docking rod 502 or the arc frame 503. The marker 8 is mainly used to be identified by the CT equipment, so that when implanting the absorbable biliary stent, the insertion status of the stent body 1 and the anti-detachment device 5 can be more intuitively observed, which can effectively avoid implantation failure caused by improper implantation operation. The marker 8 itself is made of the same material as the end docking rod 502 or the arc frame 503, but a contrast agent needs to be placed inside the marker 8 to facilitate inspection by the CT equipment.

[0048] Embodiment 7: Based on Embodiment 6, the present invention further provides a method for using a biliary absorbable stent, comprising the following steps:

[0049] Step 1: Before the implantation operation, the fixing devices 7 are slid and installed in sequence from the end connecting rod 204 into the matching slideway 203. At this time, the main support rod 102 and the auxiliary rod 103 will be firmly attached to the surface of the inner pull rod 202 under the fixation of the fixing device 7, which will also make the elastic frame 104 in a bent state, so that the stent body 1 and the anti-detachment device 5 can be stored in the surface of the inner pull rod 202 in a folded state, so as to facilitate the insertion of the entire biliary absorbable stent into the human body, and at the same time, the anti-detachment pushing sleeve 201 will also be against the surface of the docking device 6;

[0050] Step 2: When it is necessary to implant the absorbable biliary stent into the bile duct, the implantation device 2 is inserted into the duodenum of the patient through the patient's mouth with the assistance of an external instrument, and then the insertion head 205 is used to push it into the bile duct from the duodenal papilla. The end of the insertion head 205 can adopt a hemispherical structure to facilitate insertion into the bile duct, and then the inner pull rod 202 and the anti-detachment pushing sleeve 201 are continuously pushed to put the absorbable biliary stent into the correct position of the bile duct. The insertion position can be determined by the depth of the inner pull rod 202 inserted into the human body. Different lengths of absorbable biliary stents can also be selected according to the different locations of the bile duct lesions. At this time, the docking device 6 is left in the duodenum, and then the anti-detachment pushing sleeve 201 is continuously pushed so that the anti-detachment pushing sleeve 201 can squeeze the docking device 6 against the intestinal wall of the duodenum, thereby preventing the absorbable biliary stent from falling off;

[0051] Step 3: After the absorbable biliary stent is inserted into the bile duct, the inner pull rod 202 is pulled out along the anti-drop push sleeve 201. At this time, since the absorbable biliary stent is pressed in the bile duct by the anti-drop push sleeve 201 and cannot move, when the inner pull rod 202 is pulled out, the inner pull rod 202 will slide with each fixing device 7. When the fixing device 7 slides out of the inner matching slideway 203 from the end connecting rod 204, the anti-drop device 5 will open under the elastic action of the outer connecting rod 501, the end docking rod 502 and the arc frame 503 to form an outwardly expanding arc structure, which is clamped in the bile duct, thereby To prevent the absorbable biliary stent from falling out of the bile duct, the main support rod 102 and the auxiliary rod 103 will also be deployed under the drive of the elastic frame 104 to support the inner wall of the bile duct, so that the bile duct can be expanded. Then, when all the fixing devices 7 slide out of the matching slide 203 from the end connecting rod 204, the absorbable biliary stent can be deployed, and then the entire implant device 2 can be pulled out from the patient's mouth. At a later stage, the drainage tube or the injection tube can be docked with the docking device 6 according to the needs of treatment to drain or inject the bile duct.

[0052] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A biliary absorbable stent, characterized in that: include: A stent body (1), wherein at least four main support rods (102) are arranged in a circumferential array at equal intervals, and auxiliary rods (103) in the same direction are arranged between adjacent main support rods (102), and the main support rods (102) and the auxiliary rods (103) are connected by an elastic frame (104) that can be absorbed by the human body; An anti-slip device (5), the anti-slip device (5) comprising an external connecting rod (501) that can be absorbed by the human body, the external connecting rod (501) being connected to an end docking rod (502) via an arc-shaped frame (503) that can be absorbed by the human body, the end docking rod (502) being fixed to an end of a main support rod (102) or an auxiliary rod (103); An implantation device (2), the implantation device (2) being inserted into the stent body (1) and used to deliver the stent body (1) into the bile duct for deployment, and a fixing device (7) for receiving the stent body (1) and the anti-detachment device (5) into the implantation device (2) is provided on the main support rod (102), the auxiliary rod (103) and the end docking rod (502); A docking device (6), the docking device (6) comprising an expanded docking sleeve (601) fixed to the main support rod (102) and retained in the duodenum, and the expanded docking sleeve (601) is used for plugging and installing with an external drainage or drug supply device, the end of the support body (1) is provided with a solution storage device (3) for supplying a solution, the solution storage device (3) comprising a solution capsule (301) retained in the duodenum, and the solution capsule (301) is fixed to the main support rod (102) via a docking port (302), and the main support rod (102) is provided with an internal flow channel (101) connected to the docking port (302). 5), and the main support rod (102) is provided with an outflow hole (101) which is in communication with the inner flow channel (105) and is used to spray the solution in the inner flow channel (105) toward the inner wall of the bile duct, the solution capsule (301) is capable of contracting and squeezing the solution in its interior into the inner flow channel (105), and the solution capsule (301) is provided with a support device (4) on the outside for maintaining the shape of the solution capsule (301) and causing the solution capsule (301) to slowly dissolve when its own support structure dissolves, the solution capsule (301) is an annular structure, and the solution capsule (301) is provided with a support device (4) symmetrical to the inner wall of the solution capsule (301) on the inside. The inner connector (303) is fixed at a position and can improve the contraction ability of the solution capsule (301) by its own contraction, the supporting device (4) comprising at least two main annular frames (401) which are sleeved inside or outside the solution capsule (301) in a circumferential array and are used to fix the solution capsule (301), and auxiliary annular frames (402) which are sleeved with the solution capsule (301) and fix the solution capsule (301) are arranged alternately between the main annular frames (401), and the main annular frames (401) and the auxiliary annular frames (402) are connected by an intermediate rod (403), and the main annular frames (401) and the auxiliary annular frames (402) are connected by an intermediate rod (403). The main annular frame (401), the auxiliary annular frame (402) and the intermediate rod (403) are all bonded and fixed to the solution capsule (301) by biological glue, and the main annular frame (401), the auxiliary annular frame (402) and the intermediate rod (403) are all made of materials that can be absorbed by the human body, the flared docking sleeve (601) is fixedly installed with a docking pipe (602) connected to the main support rod (102), and the end of the docking pipe (602) is plugged and installed with the docking port (302) through a docking joint (603) that can be periodically detached, the stent body (1) is provided with a mantle (9) by bonding with biological glue, and the docking port (302) is used to supply solution between the mantle (9) and the inner wall of the bile duct; The implant device (2) comprises an inner pull rod (202) inserted into the stent body (1), and the inner pull rod (202) is sleeved with an anti-drop push sleeve (201) that abuts against the docking device (6), the inner pull rod (202) is provided with a matching slideway (203) that is slidably mounted with the fixing device (7), and the end of the inner pull rod (202) is connected to a top entry head (205) that is convenient for insertion into the bile duct through an end connecting rod (204); the fixing device (7) comprises a connecting seat (701) that is mounted with the main support rod (102), the auxiliary rod (103) or the end docking rod (502) by means of biological glue, and a sliding docking seat (703) is provided at the bottom of the connecting seat (701), and a sliding groove (702) that is slidably mounted with the matching slideway (203) is provided between the connecting seat (701) and the sliding docking seat (703).

2. The absorbable biliary stent according to claim 1, characterized in that: The anti-drop device (5) is provided with a marking body (8) for facilitating scanning and observing the insertion position of the stent body (1) through CT equipment, and the marking body (8) is installed on the end docking rod (502) or the arc-shaped frame (503).

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