A stent and delivery system

Abstract

The embodiment of the utility model provides a kind of support and implantation system, it is related to medical instrument technical field.Support includes liquid suction liquid storage piece, support body and drainage tube, liquid suction liquid storage piece is equipped with mounting groove, mounting groove is through the proximal end and the distal end of liquid suction liquid storage piece, support body is set in mounting groove;The distal end of drainage tube is set in mounting groove, and it is between liquid suction liquid storage piece and support body, for liquid suction or liquid release to liquid suction liquid storage piece.Under the self-expanding effect of support body, the inner wall of human body lumen can be pried open, drainage tube can be connected to negative pressure device, and the pus secreted by human body is sucked by liquid suction liquid storage piece;Drainage tube can also be connected to liquid injection device, inject treatment liquid into liquid suction liquid storage piece, and slowly release to fistula, improve the treatment effect of fistula;And by setting mounting groove, the installation stability of drainage tube and support can be improved, the stability of liquid suction and liquid release process is guaranteed, so as to improve the treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a stent and implantation system. Background Technology

[0002] A gastrointestinal fistula is an abnormal opening or passage in the wall of the digestive tract that allows contents to leak into other parts of the body. It is a serious, potentially life-threatening complication, often caused by surgery, trauma, inflammation, infection, or tumors. Based on the location of the fistula, gastrointestinal fistulas are generally classified as upper gastrointestinal fistulas (including esophageal fistulas, tracheoesophageal fistulas, tracheoesophageal fistulas, and esophageal anastomotic fistulas) and lower gastrointestinal fistulas (including jejunal fistulas, ileal fistulas, colonic fistulas, and rectal fistulas).

[0003] Currently, stents are typically placed at the fistula opening in the digestive tract. The stent's self-expanding properties prop open the tract wall, ensuring the patency of the body's lumen, followed by appropriate treatment to promote fistula healing. However, existing stents suffer from poor treatment outcomes. Utility Model Content

[0004] The purpose of this invention is to provide a stent and placement system that can improve the treatment effect of fistulas.

[0005] The embodiments of this utility model are implemented as follows: In a first aspect, this utility model provides a bracket, comprising: A liquid-absorbing and storing component, wherein the liquid-absorbing and storing component has an installation groove that extends through the proximal end and the distal end of the liquid-absorbing and storing component; A bracket body, at least a portion of which is disposed within the mounting groove; and A drainage tube is provided at its distal end within the mounting groove and located between the liquid absorption reservoir and the support body. The drainage tube is used to absorb or release liquid from the liquid absorption reservoir.

[0006] In an optional embodiment, the mounting groove is provided on the outer wall of the liquid absorption and storage component.

[0007] In an optional embodiment, the liquid absorption and storage component has a first outer side wall and a second outer side wall disposed opposite to each other, and the mounting groove is disposed close to the second outer side wall; The support body has a third outer side wall and a fourth outer side wall that are arranged opposite to each other. The first outer side wall, the third outer side wall, the fourth outer side wall and the second outer side wall are arranged at intervals in sequence. The distal end of the drainage tube is located between the first outer side wall and the third outer side wall. The distance between the first outer sidewall and the third outer sidewall is greater than the distance between the second outer sidewall and the fourth outer sidewall.

[0008] In an optional embodiment, the mounting groove is a columnar groove, the bracket body is tubular, and the bracket body is coaxially arranged with the columnar groove.

[0009] In an optional embodiment, the liquid-absorbing reservoir is cylindrical.

[0010] In an optional embodiment, the center of the cross-section of the liquid absorption and storage device coincides with the center of the cross-section of the drainage tube.

[0011] In an optional embodiment, the inner wall of the liquid absorption and storage component includes a first arc-shaped wall, a first flat wall, and a second arc-shaped wall connected in sequence. The first arc-shaped wall and the second arc-shaped wall are disposed opposite to each other, and the mounting groove is formed between the first arc-shaped wall, the first flat wall, and the second arc-shaped wall. The outer peripheral wall of the support body includes a third arc-shaped wall, a second flat wall, and a fourth arc-shaped wall connected in sequence. The third arc-shaped wall abuts against the first arc-shaped wall, the second flat wall abuts against the first flat wall, and the fourth arc-shaped wall abuts against the second arc-shaped wall. The distal end of the drainage tube is located between the first planar wall and the second planar wall.

[0012] In an optional embodiment, the inner wall of the mounting groove is provided with a slot, and the distal end of the drainage tube is disposed in the slot.

[0013] In an optional embodiment, an end hole is provided on the distal end face of the drainage tube, and the drainage tube is used to draw or release liquid from the liquid storage device through the end hole.

[0014] In an optional embodiment, a side hole is provided on the side of the drainage tube, and the drainage tube is used to draw or release liquid from the liquid storage device through the side hole.

[0015] In an optional embodiment, the number of side holes is multiple, and the multiple side holes are spaced apart along the axial direction of the drainage tube.

[0016] In an optional embodiment, the liquid absorption and storage component includes a first mounting portion, a second mounting portion, and a reinforcing portion. The first mounting portion and the second mounting portion are spaced apart from the reinforcing portion, and the mounting groove is formed between the first mounting portion, the second mounting portion, and the reinforcing portion. At least a portion of the support body simultaneously abuts against the first mounting portion, the second mounting portion, and the reinforcing portion, and the distal end of the drainage tube is disposed between the reinforcing portion and the support body; The cross-sectional area of ​​the reinforcing part is larger than the cross-sectional areas of the first mounting part and the second mounting part.

[0017] In an optional embodiment, the cross-section of the reinforcing part is a semi-circular surface, and the cross-sections of the first mounting part and the second mounting part are both arc-shaped surfaces; The cross-sectional area of ​​the first mounting portion gradually decreases in the direction away from the reinforcing portion, and the cross-sectional area of ​​the second mounting portion also gradually decreases in the direction away from the reinforcing portion.

[0018] In an optional embodiment, the support body includes a first cup-mouth section and an intermediate section connected to each other. The first cup-mouth section is located at the proximal end of the intermediate section, and the cross-sectional radius of the first cup-mouth section is larger than the cross-sectional radius of the intermediate section. The first cup-mouth section abuts against the proximal end of the liquid absorption and storage component, and the intermediate section is disposed within the mounting groove. The drainage tube is inserted through the first cup opening section, and the distal end of the drainage tube is located between the liquid absorption and storage component and the intermediate section.

[0019] In an optional embodiment, the liquid-absorbing and storing component is cylindrical, and the center of the cross-section of the first cup-mouth section coincides with the center of the cross-section of the liquid-absorbing and storing component.

[0020] In an optional embodiment, the cross-sectional radius of the first cup opening is equal to the cross-sectional radius of the liquid-absorbing and storing component.

[0021] In an optional embodiment, the support body includes a second cup-mouth section and an intermediate section connected together. The second cup-mouth section is located at the distal end of the intermediate section, and the cross-sectional radius of the second cup-mouth section is larger than the cross-sectional radius of the intermediate section. The second cup-mouth section abuts against the distal end of the liquid absorption and storage component, and the intermediate section is disposed within the mounting groove. The distal end of the drainage tube is located between the liquid absorption and storage device and the intermediate section.

[0022] In an optional embodiment, the liquid-absorbing and storing component is cylindrical, and the center of the cross-section of the second cup mouth section coincides with the center of the cross-section of the liquid-absorbing and storing component.

[0023] In an optional embodiment, the cross-sectional radius of the second cup mouth section is equal to the cross-sectional radius of the liquid absorption and storage component.

[0024] In an optional embodiment, the liquid-absorbing and storing component is a sponge, gauze, non-woven fabric, or gelatin sponge.

[0025] In an optional embodiment, the support further includes a granulation barrier layer that covers a portion of the liquid absorption reservoir.

[0026] In an optional embodiment, the granulation barrier layer is gauze, non-woven fabric, permeable membrane, biodegradable membrane, or silicone membrane.

[0027] In an optional embodiment, the support further includes a long sleeve, a portion of which is disposed within the support body and connected to the distal end of the support body; another portion of which extends from the proximal end of the support body.

[0028] In an optional embodiment, there are multiple drainage tubes, the distal ends of which are all disposed in the mounting groove and located between the liquid absorption and storage component and the support body. The multiple drainage tubes are used to absorb or release liquid from the liquid absorption and storage component.

[0029] Secondly, the present invention provides an insertion system, including an inserter and a stent as described in any of the foregoing embodiments, wherein the inserter is used to insert the stent into the lumen of the human body. The implant includes an inner tube and a middle tube, with the inner tube passing through the middle tube and the drainage tube passing through the middle tube.

[0030] In an optional embodiment, the inserter further includes an outer tube sleeved on the middle tube, and a receiving cavity is formed between the outer tube and the inner tube for accommodating the support, and the middle tube is used to push the support to move relative to the outer tube.

[0031] In an optional embodiment, the inserter further includes an outer tube flexible head disposed at the distal end of the outer tube, which can extend or retract from the outer tube flexible head when the middle tube moves relative to the outer tube.

[0032] In an optional embodiment, the outer tube flexible head includes a flexible head body and a plurality of elastic abutment portions. The flexible head body is disposed at the distal end of the outer tube, and the plurality of elastic abutment portions are circumferentially spaced on the flexible head body and located at the end of the flexible head body away from the distal end of the outer tube. The plurality of elastic abutment portions can abut against the middle tube.

[0033] In an optional embodiment, the outer tube has an auxiliary through hole for an auxiliary line to pass through.

[0034] In an optional embodiment, the inserter further includes a distal handle and a proximal handle, the distal handle being connected to the outer tube and the proximal handle being connected to the middle tube.

[0035] In an optional embodiment, the inserter further includes a developing ring disposed at the distal end of the central tube.

[0036] The beneficial effects of this utility model embodiment include: The stent includes a liquid absorption and storage component, a stent body, and a drainage tube. The liquid absorption and storage component has an installation groove that extends through the proximal and distal ends of the liquid absorption and storage component. At least a portion of the stent body is disposed within the installation groove. The distal end of the drainage tube is disposed within the installation groove and is located between the liquid absorption and storage component and the stent body. The drainage tube is used to absorb or release liquid from the liquid absorption and storage component.

[0037] The stent can be inserted into the body's lumen using an inserter. The stent's self-expansion expands the inner wall of the lumen, creating a sealed space within it. The aspirator / reservoir is located within this sealed space. The drainage tube can then be connected to a negative pressure device. Under negative pressure, the aspirator / reservoir absorbs and drains pus and bodily fluids secreted at the fistula, keeping the fistula clean and reducing infection. Since the fistula is also located within this sealed space, it can be sealed, promoting healing and improving treatment outcomes. Furthermore, the drainage tube can be connected to an injection device to inject therapeutic fluids (such as chemotherapy drugs) into the sealed space, which are then stored in the aspirator / reservoir. The reservoir's function allows for the slow release of this therapeutic fluid to the fistula, further enhancing treatment effectiveness. Based on this, by opening an installation groove on the liquid aspiration and storage device, the installation stability of the drainage tube and the support can be improved, further ensuring the stability of the liquid aspiration and drainage process, and further improving the treatment effect.

[0038] The implantation system includes an implanter and a stent. The implanter can place the stent into the fistula in the body's lumen and perform corresponding treatments, which can also improve the treatment effect of the fistula. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the insertion system provided in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the first type of bracket provided in an embodiment of the present utility model; Figure 3 A cross-sectional view of a first type of bracket provided in an embodiment of this utility model; Figure 4 for Figure 3 Sectional view of section AA in the image; Figure 5This is a schematic diagram of the structure of the second type of bracket provided in an embodiment of the present utility model; Figure 6 A cross-sectional view of the second type of bracket provided in an embodiment of this utility model; Figure 7 for Figure 6 Sectional view of section BB in the middle; Figure 8 A schematic diagram of the liquid absorption and storage component of the second type of support provided in this embodiment of the utility model; Figure 9 This is a schematic diagram of the structure of the support body of the second type of support provided in this embodiment of the utility model; Figure 10 This is a schematic diagram of the structure of the third type of bracket provided in the embodiment of this utility model; Figure 11 A schematic diagram of the assembly of the liquid absorption and storage component and the support body of the third type of support provided in this embodiment of the utility model; Figure 12 A cross-sectional view of the fourth type of bracket provided in this embodiment of the utility model; Figure 13 This is a partial structural schematic diagram of the insertion system provided in an embodiment of the present utility model; Figure 14 for Figure 13 The CC section sectional view in the middle; Figure 15 This is a schematic diagram of the structure of the flexible outer tube provided in an embodiment of the present invention.

[0041] Icons: 1000 - Insertion system; 100 - Support; 10 - Liquid suction and storage component; 11 - Mounting groove; 12 - First arc-shaped wall; 13 - First flat wall; 14 - Second arc-shaped wall; 15 - Slot; 16 - First mounting part; 17 - Second mounting part; 18 - Reinforcing part; 191 - First outer wall; 192 - Second outer wall; 20 - Support body; 21 - Third arc-shaped wall; 22 - Second flat wall; 23 - Fourth arc-shaped wall; 24 - First cup mouth section; 25 - Middle section; 26 - Second cup segment; 271-Third outer side wall; 272-Fourth outer side wall; 30-Drainage tube; 31-End hole; 32-Side hole; 40-Granulation barrier layer; 50-Long sleeve; 60-Connector; 200-Insertor; 201-Inner tube; 202-Middle tube; 203-Outer tube; 2031-Auxiliary through hole; 205-Outer tube soft tip; 2051-Soft tip body; 2052-Elastic abutment part; 206-Distal handle; 207-Proximal handle; 208-Illuminating ring; 300-Guide wire. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0047] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] As described in the background section, current methods typically involve placing a stent at the fistula opening in the digestive tract. The stent's self-expanding properties prop open the tract wall, ensuring the patency of the body's lumen, followed by appropriate treatment to promote fistula healing. However, existing stents suffer from poor treatment outcomes.

[0049] Based on this, please refer to Figures 1-15 The present invention provides a stent 100 and an insertion system 1000, which can effectively improve the aforementioned technical problems, that is, improve the treatment effect of fistula. The stent 100 and the insertion system 1000 will be described in detail below.

[0050] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of the implantation system 1000 provided in this embodiment. (In conjunction with...) Figure 1 The implantation system 1000 includes an implanter 200 and a stent 100, the implanter 200 being used to insert the stent 100 into a lumen of the human body.

[0051] For details, please refer to Figure 2 , Figure 2 This is a structural schematic diagram of the first type of support 100 provided in this embodiment. (In conjunction with...) Figure 2 The support 100 includes a liquid absorption and storage component 10, a support body 20, and a drainage tube 30. The liquid absorption and storage component 10 has an installation groove 11. Figure 8 As shown in the figure, the mounting groove 11 extends through the proximal and distal ends of the liquid absorption and storage component 10, and at least a portion of the support body 20 is disposed within the mounting groove 11; the distal end of the drainage tube 30 is disposed within the mounting groove 11 and is located between the liquid absorption and storage component 10 and the support body 20, and the drainage tube 30 is used to absorb or release liquid from the liquid absorption and storage component 10.

[0052] In simple terms, during use, the stent 100 can be inserted into the lumen of the human body through the inserter 200. Under the self-expansion of the stent body 20, the inner wall of the lumen can be opened, forming a sealed space between the stent and the inner wall of the lumen. The aspirator 10 is located within this sealed space. Thus, the drainage tube 30 can be connected to a negative pressure device. Under the action of negative pressure adsorption, the aspirator 10 absorbs and drains the pus and body fluids secreted at the fistula, keeping the fistula clean and reducing infection. Since the fistula is also located within this sealed space, it can be sealed, thereby promoting fistula healing and improving treatment effectiveness.

[0053] In addition, the drainage tube 30 can be connected to an external injection device to inject therapeutic fluid (such as chemotherapy drugs) into the sealed space and store it in the aspirating reservoir 10. Due to the storage function of the aspirating reservoir 10, the therapeutic fluid can be slowly released to the fistula, which improves the treatment effect.

[0054] Based on this, by opening an installation groove 11 on the liquid aspiration and storage component 10, the installation stability of the drainage tube 30 and the support 100 can be improved, further ensuring the stability of the liquid aspiration and drainage process, thereby further improving the treatment effect.

[0055] It should be noted that the proximal end of the drainage tube 30 is used to connect to a negative pressure device or a liquid injection device, thereby facilitating negative pressure liquid aspiration or drainage operations. Figure 1 To facilitate the connection between the drainage tube 30 and the negative pressure device or the injection device, the bracket 100 also includes a connector 60, which is located at the proximal end of the drainage tube 30 and is used to connect to the negative pressure device or the injection device.

[0056] Optionally, the connector 60 is detachably connected to the proximal end of the drainage tube 30. Specifically, in this embodiment, the connector 60 is a Luer connector 60.

[0057] Please refer to Figure 3 and Figure 4 , Figure 3 This is a cross-sectional view of the first type of support 100 provided in this embodiment. Figure 4 for Figure 3 Sectional view of section AA in the image. Combined with... Figures 2-4 In this embodiment, the mounting groove 11 is a columnar groove, the bracket body 20 is tubular, and the bracket body 20 is coaxially arranged with the columnar groove.

[0058] In other words, the center of the cross-section of the mounting groove 11 coincides with the center of the cross-section of the bracket body 20, which enables the bracket body 20 to be better assembled with the liquid absorption and storage component 10, thereby improving installation stability.

[0059] Furthermore, the liquid absorption and storage component 10 is cylindrical, which can better adapt to the shape of the human body's lumen and improve the effect of liquid absorption and storage.

[0060] Specifically, in this embodiment, the center of the cross-section of the aspirating reservoir 10 coincides with the center of the cross-section of the drainage tube 30. That is, the drainage tube 30 is positioned at the center of the aspirating reservoir 10, which allows for better negative pressure suction of the pus or bodily fluids stored in the reservoir 10, or for more even delivery of treatment fluids into the reservoir 10 for storage, thereby further improving the treatment effect. Of course, in other embodiments, the center of the cross-section of the aspirating reservoir 10 and the center of the cross-section of the drainage tube 30 may not coincide.

[0061] It should be noted that the tubular stent body 20 and the liquid aspiration reservoir 10 can better adapt to the shape of the human body's lumen; thus, the sealing effect of the sealed space formed by the tubular stent body 20 and the inner wall of the lumen is better, and it is not easy to scratch the tube wall; while the tubular liquid aspiration reservoir 10 can adapt to the shape of the stent body 20 and the lumen, better fit different parts of the human body's lumen, and realize the ability to perform aspiration and drainage treatment at different tube wall locations.

[0062] Combination Figure 4 In this embodiment, an end hole 31 is provided on the distal end face of the drainage tube 30. The drainage tube 30 is used to absorb or release fluid from the aspirator reservoir 10 through the end hole 31. That is, the drainage tube 30 directly absorbs pus and body fluids under negative pressure through the distal end hole 31, or the treatment fluid flows into the aspirator reservoir 10 through the end hole 31 for storage, and then slowly releases it to the fistula.

[0063] Of course, a side hole 32 can also be provided on the side of the drainage tube 30. The drainage tube 30 is used to draw or release liquid from the liquid storage device 10 through the side hole 32. In this way, the drainage tube 30 can perform liquid drawing and releasing operations on the liquid storage device 10 at different locations.

[0064] Combination Figure 3 and Figure 4 Specifically, in this embodiment, the number of side holes 32 can be set to multiple, and the multiple side holes 32 are spaced apart along the axial direction of the drainage tube 30. By setting multiple spaced side holes 32, the effect of fluid absorption and drainage of the drainage tube 30 can be further improved, thereby improving the healing speed of the fistula.

[0065] It should be noted that, to improve the installation stability of the drainage tube 30, the support 100 may also include sutures (not shown in the figure), through which the drainage tube 30 is connected to the support body 20. During suturing, the sutures can be passed sequentially through multiple side holes 32 and secured with the mesh structure of the support body 20. Alternatively, to avoid affecting the aspiration and drainage performance of the side holes 32, the drainage tube 30 may also have a separate mounting hole for suturing to the support body 20, while the side holes 32 are used for aspiration and drainage independently.

[0066] Optionally, in other embodiments, the number of drainage tubes 30 can be set to multiple, with the distal ends of the multiple drainage tubes 30 all disposed in the mounting groove 11 and located between the liquid absorption and storage component 10 and the support body 20. The multiple drainage tubes 30 are used to absorb or release liquid from the liquid absorption and storage component 10 respectively.

[0067] As is easily understood, in actual operation, the specific number of drainage tubes 30, and the setting for each drainage tube 30 to perform aspiration or drainage, can be determined according to the treatment needs and specific circumstances. For example, if there are two drainage tubes 30, one drainage tube 30 can perform negative pressure aspiration of pus and body fluids, while the other drainage tube 30 can perform drainage of treatment fluids; of course, both drainage tubes 30 can also perform aspiration, or both drainage tubes 30 can perform drainage. Through different combinations, the treatment needs can be met, further promoting the healing of the fistula.

[0068] It should be noted that, specifically in this embodiment, the liquid-absorbing and storing component 10 is a sponge, that is, the liquid-absorbing and storing component 10 is an annular tubular structure made of sponge, which can utilize the properties of the sponge itself to absorb or release liquid. Of course, in other embodiments, the liquid-absorbing and storing component 10 can also be gauze, non-woven fabric, or gelatin sponge, as long as it can achieve the function of absorbing and storing liquid.

[0069] It should be noted that in the first type of bracket 100 provided in this embodiment, the mounting groove 11 is cylindrical in shape, which can better fit the tubular bracket body 20. Of course, in other embodiments, the mounting groove 11 and the bracket body 20 can also be other shapes. For example, please refer to... Figures 5-9 , Figure 5 This is a structural schematic diagram of the second type of support 100 provided in this embodiment. Figure 6 This is a cross-sectional view of the second type of support 100 provided in this embodiment. Figure 7 for Figure 6 BB section sectional view in the middle, Figure 8 This is a schematic diagram of the liquid absorption and storage component 10 of the second type of support 100 provided in this embodiment. Figure 9 This is a schematic diagram of the support body 20 of the second type of support 100 provided in this embodiment.

[0070] Combination Figures 5-9 The inner wall of the liquid absorption and storage component 10 includes a first arc-shaped wall 12, a first flat wall 13, and a second arc-shaped wall 14 connected in sequence. The first arc-shaped wall 12 and the second arc-shaped wall 14 are arranged opposite to each other, and an installation groove 11 is formed between the first arc-shaped wall 12, the first flat wall 13, and the second arc-shaped wall 14. The outer peripheral wall of the support body 20 includes a third arc-shaped wall 21, a second flat wall 22, and a fourth arc-shaped wall 23 connected in sequence. The third arc-shaped wall 21 abuts against the first arc-shaped wall 12, the second flat wall 22 abuts against the first flat wall 13, and the fourth arc-shaped wall 23 abuts against the second arc-shaped wall 14. The distal end of the drainage tube 30 is located between the first flat wall 13 and the second flat wall 22.

[0071] like Figure 8As shown, the mounting groove 11 formed by the first arc-shaped wall 12, the first flat wall 13, and the second arc-shaped wall 14 is specifically a mounting groove 11 with a "D"-shaped structure, and combined with Figure 9 The corresponding stent body 20 also has at least a portion of its cross-sectional shape as a "D" shape. This D-shaped structure, with its two planes fitting together, improves the installation stability of the stent body 20 and the liquid absorption reservoir 10. Furthermore, the drainage tube 30 is positioned on the plane of this D-shaped structure, allowing for easier suturing and fixation to the stent body 20 via sutures, while also enhancing the effectiveness of liquid absorption and drainage.

[0072] It should be noted that in the first type of support 100 provided in this embodiment, an installation groove 11 is provided on the outer wall of the liquid absorption and storage component 10. That is, during assembly, the support body 20 is inserted into the installation groove 11 from one side of the liquid absorption and storage component 10, which is convenient and quick to install and can improve installation stability. Furthermore, since the support body 20 itself is coated, granulation tissue is less likely to grow on the side of the support body 20 without the liquid absorption and storage component 10, which is beneficial for the later removal of the support 100.

[0073] Combination Figure 7 and Figure 8 Specifically, the liquid absorption and storage component 10 includes a first mounting portion 16, a second mounting portion 17, and a reinforcing portion 18. The first mounting portion 16 and the second mounting portion 17 are spaced apart from the reinforcing portion 18, and a mounting groove 11 is formed between the first mounting portion 16, the second mounting portion 17, and the reinforcing portion 18. At least a portion of the support body 20 simultaneously abuts against the first mounting portion 16, the second mounting portion 17, and the reinforcing portion 18, and the distal end of the drainage tube 30 is disposed between the reinforcing portion 18 and the support body 20. The cross-sectional area of ​​the reinforcing portion 18 is larger than the cross-sectional areas of the first mounting portion 16 and the second mounting portion 17.

[0074] like Figure 8 As shown, when the fluid-absorbing reservoir 10 is fitted with the lumen, the reinforcing portion 18 with a larger cross-sectional area can be fitted with the fistula opening. That is, the portion of the fluid-absorbing reservoir 10 away from the mounting groove 11 is aligned with the fistula opening for treatment. Due to the large volume of the reinforcing portion 18, it can absorb more pus and bodily fluids; or store more treatment fluid for slow release to the fistula opening for treatment, thereby further improving the treatment effect. In addition, the reinforcing portion 18 is also highly elastic, which can reduce patient discomfort during treatment, thereby improving patient comfort.

[0075] Furthermore, the cross-section of the reinforcing part 18 is a semi-circular surface, and the cross-sections of the first mounting part 16 and the second mounting part 17 are both arc-shaped surfaces; wherein, the area of ​​the cross-section of the first mounting part 16 gradually decreases in the direction away from the reinforcing part 18, and the area of ​​the cross-section of the second mounting part 17 gradually decreases in the direction away from the reinforcing part 18.

[0076] It is easy to understand that by setting the reinforcing part 18 as a semi-circular structure and correspondingly setting the first mounting part 16 and the second mounting part 17 as arc-shaped structures, the shape of the lumen can be better adapted, improving the treatment effect and patient comfort. In addition, the cross-sectional area of ​​the first mounting part 16 and the second mounting part 17 decreases in the direction away from the reinforcing part 18, which can also improve the installation and clamping effect on the stent body 20.

[0077] Combination Figures 2-6 In the first and second type of support provided in this embodiment, the support body 20 includes a first cup-mouth section 24 and a middle section 25 connected to each other. The first cup-mouth section 24 is located near the proximal end of the middle section 25, and the cross-sectional radius of the first cup-mouth section 24 is larger than that of the middle section 25. The first cup-mouth section 24 abuts against the proximal end of the liquid absorption and storage component 10, and the middle section 25 is disposed in the mounting groove 11. The drainage tube 30 passes through the first cup-mouth section 24, and the distal end of the drainage tube 30 is located between the liquid absorption and storage component 10 and the middle section 25. That is, the middle section 25 of the support body 20 is assembled in the mounting groove 11 of the liquid absorption and storage component 10, and the first cup-mouth section 24 abuts against the liquid absorption and storage component 10, which can further improve the installation stability of both.

[0078] Furthermore, the center of the cross-section of the first cup segment 24 coincides with the center of the cross-section of the liquid absorption and storage component 10, which also enables the bracket body 20 to be better assembled with the liquid absorption and storage component 10, thereby improving installation stability.

[0079] Specifically, in this embodiment, the cross-sectional radius of the first cup segment 24 is equal to the cross-sectional radius of the liquid absorption and storage component 10. For example... Figure 2 or Figure 5 As shown, the outer peripheral wall of the aspirating reservoir 10 and the outer peripheral wall of the first cup-shaped segment 24 can be understood as forming the same tubular structure. This allows the aspirating reservoir 10 and the first cup-shaped segment 24 to fit within the same diameter of the lumen, ensuring a tight seal with the inner wall of the lumen and improving the therapeutic effect of the aspirating reservoir 10 on the fistula site. Furthermore, when the stent 100 is withdrawn, it reduces pulling damage to the lumen, avoids secondary injury, and improves patient comfort. Of course, in some other embodiments, the cross-sectional radius of the first cup-shaped segment 24 can be larger or smaller than the cross-sectional radius of the aspirating reservoir 10.

[0080] Please refer to Figure 10 and Figure 11 , Figure 10 Here is a schematic diagram of the structure of the third type of support 100 provided in the embodiment. Figure 11 This is a schematic diagram showing the assembly of the liquid absorption and storage component 10 and the support body 20 of the third type of support 100 provided in this embodiment. (Combined with...) Figure 10 and Figure 11 In the third type of support 100 provided in this embodiment, in order to further improve the installation stability of the drainage tube 30 and improve the subsequent treatment effect of aspiration and drainage, a slot 15 is provided on the inner wall of the installation groove 11, and the distal end of the drainage tube 30 is set in the slot 15.

[0081] Furthermore, in the third type of support 100, the support body 20 includes a second cup-mouth section 26 and an intermediate section 25 connected to each other. The second cup-mouth section 26 is located at the distal end of the intermediate section 25, and the cross-sectional radius of the second cup-mouth section 26 is larger than the cross-sectional radius of the intermediate section 25. The second cup-mouth section 26 abuts against the distal end of the liquid absorption and storage component 10, and the intermediate section 25 is disposed in the mounting groove 11. The distal end of the drainage tube 30 is located between the liquid absorption and storage component 10 and the intermediate section 25.

[0082] It should be noted that, in this embodiment, the support body 20 can be a frame structure having only a middle section 25 and a first cup-mouth section 24 located near the middle section 25; or it can be a frame structure having only a middle section 25 and a second cup-mouth section 26 located far from the middle section 25. Of course, in other embodiments, the support body 20 can also include a first cup-mouth section 24, a middle section 25, and a second cup-mouth section 26 connected in sequence; that is, both ends of the middle section 25 are provided with cup-mouth sections, forming a dumbbell-like structure, which can further seal both ends of the tube cavity and improve the sealing effect of the formed internal space. Furthermore, in other embodiments, neither end of the middle section 25 may be provided with cup-mouth sections, and the entire middle section 25 can be directly placed within the mounting groove 11.

[0083] Similarly, in the third type of stent 100, to improve treatment effectiveness and patient comfort, the center of the cross-section of the second cup segment 26 coincides with the center of the cross-section of the liquid-absorbing reservoir 10, and the radius of the cross-section of the second cup segment 26 is equal to the radius of the cross-section of the liquid-absorbing reservoir 10. Of course, in some other embodiments, the radius of the cross-section of the second cup segment 26 may be greater than or less than the radius of the cross-section of the liquid-absorbing reservoir 10.

[0084] Please continue to combine Figure 10 To prevent granulation tissue from penetrating into the liquid absorption reservoir 10 and thus avoid damage caused by pulling on the granulation tissue when the stent 100 is withdrawn from the lumen, in this embodiment, the stent 100 further includes a granulation tissue barrier layer 40, which covers a portion of the liquid absorption reservoir 10.

[0085] It should be noted that the granulation barrier layer 40 is specifically fitted to the lumen of the non-fistula portion. Therefore, in actual installation, the granulation barrier layer 40 does not completely cover the second liquid absorption reservoir 10.

[0086] To improve the barrier effect, multiple granulation tissue barrier layers 40 can be provided, with the multiple granulation tissue barrier layers 40 arranged sequentially and at intervals along the extension direction of the liquid absorption reservoir 10. This further improves the treatment effect when the lumen has multiple fistula openings, making it suitable for applications requiring multiple fistula openings.

[0087] It should be noted that in this embodiment, the granulation tissue barrier layer 40 is specifically gauze; of course, in other embodiments, the granulation tissue barrier layer 40 can also be non-woven fabric, permeable membrane, biodegradable membrane or silicone membrane, etc., as long as it can achieve the function of granulation tissue barrier.

[0088] Furthermore, the support 100 also includes a long sleeve 50, a portion of which is disposed within the support body 20 and connected to the distal end of the support body 20; the other portion of which extends from the proximal end of the support body 20.

[0089] The long sleeve 50 is used when there is trauma to the intestine (usually the large intestine) but a fistula has not yet formed. It prevents the trauma from worsening and forming a fistula. The long sleeve 50 isolates feces from the intestine, thus preventing feces from contaminating and irritating the wound on the intestine, and preventing fistula formation. The absorbent reservoir 10 in the stent 100 further prevents feces from entering the intestine isolated by the long sleeve 50 through the gaps in the stent 100. In actual use, one end of the long sleeve 50 is attached to the stent body 20 and extends all the way to the outside of the anus.

[0090] Please refer to Figure 12 , Figure 12 This is a cross-sectional view of the fourth type of support 100 provided in this embodiment, combined with... Figure 12 In the fourth type of support 100, its liquid absorption and storage component 10 has a first outer side wall 191 and a second outer side wall 192 arranged opposite to each other, and the mounting groove 11 is arranged close to the second outer side wall 192. The support body 20 has a third outer side wall 271 and a fourth outer side wall 272 arranged opposite to each other, and the first outer side wall 191, the third outer side wall 271, the fourth outer side wall 272 and the second outer side wall 192 are arranged alternately in sequence, and the distal end of the drainage tube 30 is located between the first outer side wall 191 and the third outer side wall 271.

[0091] The distance d1 between the first outer wall 191 and the third outer wall 271 is greater than the distance d2 between the second outer wall 192 and the fourth outer wall 272, that is, d1 > d2.

[0092] Understandably, the support body 20 and the liquid absorption reservoir 10 are eccentrically positioned; that is, the center of the cross-section of the support body 20 and the center of the cross-section of the liquid absorption reservoir 10 are spaced apart. From Figure 12 As can be seen, the fluid-absorbing reservoir 10 is thicker on one side and thinner on the other, while the stent body 20 is positioned on the thinner side. This allows the thicker side of the fluid-absorbing reservoir 10 to be placed at the fistula opening, facilitating the absorption of fistula fluid. Furthermore, the stent body 20 itself is covered with a membrane, making it less prone to granulation tissue growth on the thinner side of the fluid-absorbing reservoir 10, which is beneficial for the later removal of the stent 100.

[0093] Optionally, in this embodiment, 0 < d2 ≤ 2 mm. For example, the thickness of the thinner side of the liquid aspiration reservoir 10 can be 0.5 mm, 1 mm, 1.5 mm or 2 mm, etc. In this way, the thickness of one side of the liquid aspiration reservoir 10 is much greater than the thickness of the other side, which can further improve the treatment effect and the convenience of removing the stent.

[0094] Please refer to Figure 13 , Figure 13 This is a partial structural diagram of the implantation system 1000 provided in this embodiment, combined with... Figure 1 , Figure 2 and Figure 13 The implant 200 includes an inner tube 201 and a middle tube 202. The inner tube 201 passes through the middle tube 202, and the drainage tube 30 passes through the middle tube 202.

[0095] In other words, during the assembly of the stent 100 and the implanter 200, the proximal end of the drainage tube 30 passes through the central tube 202 and is then connected to the connector 60. It is easy to understand that the connector 60 can be further connected to a negative pressure device or an infusion device in subsequent treatment processes.

[0096] Please refer to Figure 14 , Figure 14 for Figure 13 The CC section sectional view in the figure, combined with Figure 13 and Figure 14 In order to guide the distal end of the inserter 200 into the lumen of the human body, the insertion system 1000 also includes a guide wire 300, which is used to pass through the inner tube 201. In actual operation, the guide wire 300 needs to be used in conjunction with an endoscope to guide the distal end of the inserter 200 into the lumen.

[0097] Furthermore, the implanter 200 also includes an outer tube 203, which is sleeved on the middle tube 202, and a receiving cavity is formed between the outer tube 203 and the inner tube 201. The receiving cavity is used to receive the support 100, and the middle tube 202 is used to push the support 100 to move relative to the outer tube 203.

[0098] It should be noted that the stent 100 itself is elastic. Before insertion, the stent 100 needs to be retracted as a whole and placed in the receiving cavity, ensuring that the stent 100 is completely placed inside the outer tube 203. When the stent 100 arrives at the fistula of the human body lumen with the inserter 200, the tube 202 moves relative to the outer tube 203 during operation, thereby pushing the stent 100 out of the outer tube 203; then, under the action of self-expansion, the stent 100 is released at the preset fistula position.

[0099] To facilitate the insertion of the bracket 100 into the inserter 200, i.e., its placement within the receiving space, in this embodiment, the outer tube 203 is provided with an auxiliary through hole 2031 for the passage of an auxiliary wire. Specifically, during assembly, the bracket 100 is compressed and pulled into the receiving space for fixation by passing the auxiliary wire through the auxiliary through hole 2031.

[0100] It should be noted that, in order to ensure the installation effect of the bracket 100, the distance between the auxiliary through hole 2031 and the far end of the outer tube 203 needs to be greater than the length of the bracket 100 after compression.

[0101] Furthermore, the inserter 200 also includes a distal handle 206 and a proximal handle 207. The distal handle 206 is connected to the outer tube 203, and the proximal handle 207 is connected to the middle tube 202. In other words, by operating the proximal handle 207 and the distal handle 206, changing the distance between them, the middle tube 202 and the outer tube 203 can be moved relative to each other, thereby releasing the stent 100.

[0102] Please continue to combine Figure 13 The inserter 200 also includes an outer tube flexible head 205, which is located at the distal end of the outer tube 203. When the middle tube 202 moves relative to the outer tube 203, the middle tube 202 can extend or retract from the outer tube flexible head 205. By providing the outer tube flexible head 205, the smoothness of the movement of the middle tube 202 relative to the outer tube 203 can be improved, ensuring the stable release of the stent 100, while reducing the impact of the tube 202 on the human body lumen during release.

[0103] For details, please refer to Figure 15 , Figure 15 This is a schematic diagram of the structure of the outer tube flexible head 205 provided in this embodiment, combined with... Figure 13 and Figure 15 The outer tube flexible head 205 includes a flexible head body 2051 and a plurality of elastic abutment parts 2052. The flexible head body 2051 is disposed at the far end of the outer tube 203. The plurality of elastic abutment parts 2052 are arranged in a ring at intervals on the flexible head body 2051 and are located at the end of the flexible head body 2051 away from the far end of the outer tube 203. The plurality of elastic abutment parts 2052 can abut against the middle tube 202.

[0104] As is easily understood, the elastic abutment portion 2052 is elastic and can abut against the middle tube 202 under the action of elastic force. During the release of the support 100, the middle tube 202 moves relative to the outer tube 203, causing the multiple elastic abutment portions 2052 to form a slightly open state and elastically abut against the outer wall of the middle tube 202 to ensure the smooth movement of the middle tube 202. When the middle tube 202 retracts into the outer tube 203, the multiple elastic abutment portions 2052 will form a slightly closed state to ensure the stable placement of the middle tube 202.

[0105] Optionally, the implanter 200 also includes a contrast ring 208, which is disposed at the distal end of the central tube 202. The contrast ring 208 can be visualized under X-ray, allowing the physician to easily confirm the release position of the stent 100 by observing the X-ray visualization of the contrast ring 208 during implantation.

[0106] In summary, the embodiments of this utility model provide a stent 100 and an insertion system 1000. The stent 100 includes a liquid absorption and storage component 10, a stent body 20, and a drainage tube 30. The liquid absorption and storage component 10 has an installation groove 11 that extends through the proximal and distal ends of the liquid absorption and storage component 10. At least a portion of the stent body 20 is disposed within the installation groove 11. The distal end of the drainage tube 30 is disposed within the installation groove 11 and is located between the liquid absorption and storage component 10 and the stent body 20. The drainage tube 30 is used to absorb or release liquid from the liquid absorption and storage component 10.

[0107] In other words, the stent 100 can be inserted into the lumen of the human body through the inserter 200. Under the self-expansion of the stent body 20, it can expand the inner wall of the lumen and form a certain sealed space with the inner wall of the lumen. The aspirator 10 is located in this sealed space. In this way, the drainage tube 30 can be connected to a negative pressure device. Under the action of negative pressure adsorption, the aspirator 10 absorbs the pus and body fluid secreted at the fistula and drains it from the body, keeping the fistula clean and reducing the risk of infection. Since the fistula is also located in this sealed space, it can be sealed, thereby promoting the recovery and healing of the fistula and improving the treatment effect. In addition, the drainage tube 30 can also be connected to an injection device to inject therapeutic fluid (such as chemotherapy drugs) into the sealed space and store it in the aspirator 10. Due to the storage function of the aspirator 10, the therapeutic fluid can be slowly released to the fistula, improving the treatment effect. Based on this, by opening an installation groove 11 on the liquid aspiration and storage component 10, the installation stability of the drainage tube 30 and the support 100 can be improved, further ensuring the stability of the liquid aspiration and drainage process, and further improving the treatment effect.

[0108] The implantation system 1000 includes an implanter 200 and a stent 100. The implanter 200 can insert the stent 100 into the fistula of the human body lumen and perform corresponding treatment, and can also improve the treatment effect of the fistula.

[0109] The above description is merely a specific embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A support, characterized in that, include: Liquid absorption and storage component (10), wherein the liquid absorption and storage component (10) is provided with an installation groove (11), the installation groove (11) penetrating the proximal end and the distal end of the liquid absorption and storage component (10); A bracket body (20), at least a portion of which is disposed within the mounting groove (11); and The drainage tube (30) is located in the mounting groove (11) at its far end and between the liquid absorption storage component (10) and the support body (20). The drainage tube (30) is used to absorb or release liquid from the liquid absorption storage component (10).

2. The bracket according to claim 1, characterized in that, The liquid absorption and storage component (10) has the mounting groove (11) on its outer side wall.

3. The bracket according to claim 1, characterized in that, The liquid absorption and storage component (10) has a first outer side wall (191) and a second outer side wall (192) disposed opposite to each other, and the mounting groove (11) is disposed close to the second outer side wall (192); The stent body (20) has a third outer side wall (271) and a fourth outer side wall (272) arranged opposite to each other. The first outer side wall (191), the third outer side wall (271), the fourth outer side wall (272) and the second outer side wall (192) are arranged in sequence at intervals. The distal end of the drainage tube (30) is located between the first outer side wall (191) and the third outer side wall (271). The distance between the first outer wall (191) and the third outer wall (271) is greater than the distance between the second outer wall (192) and the fourth outer wall (272).

4. The bracket according to claim 1, characterized in that, The mounting groove (11) is a columnar groove, and the bracket body (20) is tubular. The bracket body (20) is coaxially arranged with the columnar groove.

5. The bracket according to claim 1, characterized in that, The liquid absorption and storage component (10) is cylindrical.

6. The bracket according to claim 5, characterized in that, The center of the cross-section of the liquid absorption and storage device (10) coincides with the center of the cross-section of the drainage tube (30).

7. The bracket according to claim 1, characterized in that, The inner wall of the liquid absorption and storage component (10) includes a first arc-shaped wall (12), a first flat wall (13), and a second arc-shaped wall (14) connected in sequence. The first arc-shaped wall (12) and the second arc-shaped wall (14) are arranged opposite to each other, and the mounting groove (11) is formed between the first arc-shaped wall (12), the first flat wall (13), and the second arc-shaped wall (14). The outer peripheral wall of the support body (20) includes a third arc surface wall (21), a second flat surface wall (22) and a fourth arc surface wall (23) connected in sequence. The third arc surface wall (21) abuts against the first arc surface wall (12), the second flat surface wall (22) abuts against the first flat surface wall (13), and the fourth arc surface wall (23) abuts against the second arc surface wall (14). The distal end of the drainage tube (30) is located between the first planar wall (13) and the second planar wall (22).

8. The bracket according to claim 1, characterized in that, The inner wall of the mounting groove (11) is provided with a slot (15), and the distal end of the drainage tube (30) is located in the slot (15).

9. The bracket according to claim 1, characterized in that, The distal end of the drainage tube (30) is provided with an end hole (31), and the drainage tube (30) is used to draw or release liquid from the liquid storage device (10) through the end hole (31).

10. The stent according to claim 1, characterized in that, The drainage tube (30) has a side hole (32) on its side, and the drainage tube (30) is used to draw or release liquid from the liquid storage device (10) through the side hole (32).

11. The stent according to claim 10, characterized in that, The number of side holes (32) is multiple, and the multiple side holes (32) are spaced apart along the axial direction of the drainage tube (30).

12. The stent according to claim 1, characterized in that, The liquid absorption and storage component (10) includes a first mounting part (16), a second mounting part (17), and a reinforcing part (18). The first mounting part (16) and the second mounting part (17) are spaced apart from the reinforcing part (18), and the mounting groove (11) is formed between the first mounting part (16), the second mounting part (17), and the reinforcing part (18). At least a portion of the stent body (20) simultaneously abuts against the first mounting portion (16), the second mounting portion (17), and the reinforcing portion (18), and the distal end of the drainage tube (30) is disposed between the reinforcing portion (18) and the stent body (20); The cross-sectional area of ​​the reinforcing part (18) is greater than that of the first mounting part (16) and the second mounting part (17).

13. The stent according to claim 12, characterized in that, The cross-section of the reinforcing part (18) is a semi-circular surface, and the cross-sections of the first mounting part (16) and the second mounting part (17) are both arc-shaped surfaces; The cross-sectional area of ​​the first mounting portion (16) gradually decreases in the direction away from the reinforcing portion (18), and the cross-sectional area of ​​the second mounting portion (17) gradually decreases in the direction away from the reinforcing portion (18).

14. The bracket according to claim 1, characterized in that, The support body (20) includes a first cup-mouth section (24) and a middle section (25) connected to each other. The first cup-mouth section (24) is located at the proximal end of the middle section (25), and the cross-sectional radius of the first cup-mouth section (24) is larger than the cross-sectional radius of the middle section (25). The first cup-mouth section (24) abuts against the proximal end of the liquid absorption reservoir (10), and the middle section (25) is disposed in the mounting groove (11). The drainage tube (30) is inserted through the first cup opening section (24), and the distal end of the drainage tube (30) is located between the liquid absorption reservoir (10) and the intermediate section (25).

15. The stent according to claim 14, characterized in that, The liquid absorption and storage component (10) is columnar, and the center of the cross-section of the first cup mouth section (24) coincides with the center of the cross-section of the liquid absorption and storage component (10).

16. The stent according to claim 15, characterized in that, The cross-sectional radius of the first cup mouth section (24) is equal to the cross-sectional radius of the liquid absorption and storage component (10).

17. The bracket according to claim 1, characterized in that, The support body (20) includes a second cup-mouth section (26) and a middle section (25) connected to each other. The second cup-mouth section (26) is located at the far end of the middle section (25), and the cross-sectional radius of the second cup-mouth section (26) is greater than the cross-sectional radius of the middle section (25). The second cup-mouth section (26) abuts against the far end of the liquid absorption reservoir (10), and the middle section (25) is disposed in the mounting groove (11). The distal end of the drainage tube (30) is located between the liquid absorption reservoir (10) and the intermediate section (25).

18. The stent according to claim 17, characterized in that, The liquid absorption and storage component (10) is columnar, and the center of the cross-section of the second cup mouth section (26) coincides with the center of the cross-section of the liquid absorption and storage component (10).

19. The stent according to claim 18, characterized in that, The cross-sectional radius of the second cup mouth section (26) is equal to the cross-sectional radius of the liquid absorption and storage component (10).

20. The stent according to claim 1, characterized in that, The liquid absorption and storage component (10) is made of sponge, gauze, non-woven fabric or gelatin sponge.

21. The stent according to any one of claims 1-20, characterized in that, The support (100) also includes a granulation barrier layer (40) which covers a portion of the liquid absorption reservoir (10).

22. The stent according to claim 21, characterized in that, The granulation barrier layer (40) is made of gauze, non-woven fabric, permeable membrane, biodegradable membrane or silicone membrane.

23. The stent according to any one of claims 1-20, characterized in that, The support (100) also includes a long sleeve (50), a portion of which is disposed within the support body (20) and connected to the distal end of the support body (20); another portion of which extends from the proximal end of the support body (20).

24. The stent according to any one of claims 1-20, characterized in that, The number of drainage tubes (30) is multiple, and the distal ends of the multiple drainage tubes (30) are all located in the mounting groove (11) and between the liquid absorption storage component (10) and the support body (20). The multiple drainage tubes (30) are used to absorb or release liquid from the liquid absorption storage component (10).

25. An insertion system, characterized in that, Includes an inserter (200) and a stent (100) according to any one of claims 1-24, the inserter (200) being used to insert the stent (100) into a lumen of a human body; The implanter (200) includes an inner tube (201) and a middle tube (202), the inner tube (201) passing through the middle tube (202), and the drainage tube (30) passing through the middle tube (202).

26. The implantation system according to claim 25, characterized in that, The implanter (200) also includes an outer tube (203), which is sleeved on the middle tube (202), and a receiving cavity is formed between the outer tube (203) and the inner tube (201). The receiving cavity is used to receive the support (100), and the middle tube (202) is used to push the support (100) to move relative to the outer tube (203).

27. The implantation system according to claim 26, characterized in that, The inserter (200) also includes an outer tube soft head (205), which is disposed at the distal end of the outer tube (203). When the middle tube (202) moves relative to the outer tube (203), the middle tube (202) can extend or retract from the outer tube soft head (205).

28. The implantation system according to claim 27, characterized in that, The outer tube flexible head (205) includes a flexible head body (2051) and a plurality of elastic abutment parts (2052). The flexible head body (2051) is disposed at the far end of the outer tube (203). The plurality of elastic abutment parts (2052) are arranged in a ring at intervals on the flexible head body (2051) and are located at the end of the flexible head body (2051) away from the far end of the outer tube (203). The plurality of elastic abutment parts (2052) can abut against the middle tube (202).

29. The implantation system according to claim 26, characterized in that, The outer tube (203) has an auxiliary through hole (2031) for the passage of auxiliary lines.

30. The implantation system according to claim 26, characterized in that, The inserter (200) also includes a distal handle (206) and a proximal handle (207), the distal handle (206) being connected to the outer tube (203) and the proximal handle (207) being connected to the middle tube (202).

31. The implantation system according to any one of claims 25-30, characterized in that, The inserter (200) also includes a developing ring (208) disposed at the distal end of the central tube (202).

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