A stent, an inserter and a medical device

Abstract

Embodiments of the present invention provide a stent, an introducer, and a medical device, relating to the technical field of medical devices. The stent provided by the embodiments of the present invention includes a body and a tube fixedly connected to the body. The distal end of the tube has an opening, and the opening is located outside the body. During use, the distal end of the tube is inserted into the human body lumen along with the body. Under the self-expansion effect of the body, the distal end of the tube contacts the wall surface of the human body lumen, and at the same time, the proximal end of the tube is located outside the human body, so that liquid, such as anti-inflammatory lotion, can be filled into the human body lumen through the opening of the tube, or pus, necrotic substances, etc. at the human body lumen can be aspirated. Moreover, the body is tubular, and the formed channel therein can ensure the smoothness of the lumen.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly, to a stent, an inserter, and a medical device. Background Art

[0002] During the treatment process, when a lesion occurs in the body lumen or stenosis or obstruction occurs due to surgery or other conditions, a stent can be implanted at the corresponding position of the lumen. Relying on the self-expanding performance of the stent, the stenosed part of the lumen is expanded to ensure the patency of the lumen. For example, the stent is implanted into the lumen of blood vessels, esophagus, duodenum, etc.

[0003] However, the inventor has found through research that the application of existing stents still has certain limitations and can be further functionally expanded. Summary of the Invention

[0004] The objectives of the present invention include, for example, providing a stent that can improve the above problems existing in the prior art.

[0005] The objectives of the present invention also include providing an inserter that can implant the above stent into the human body.

[0006] The objectives of the present invention also include providing a medical device that includes the above stent and / or inserter.

[0007] The embodiments of the present invention can be implemented as follows:

[0008] An embodiment of the present invention provides a stent, which includes a body and a tube connected to the body. The distal end of the tube has an opening for sucking and discharging liquid through the opening; the opening is located outside the body.

[0009] Optionally, the stent further includes a liquid suction and storage layer disposed outside the body. At least a part of the liquid suction and storage layer covers the tube so that the opening sucks and discharges liquid through the liquid suction and storage layer.

[0010] Optionally, the liquid suction and storage layer is annular, and the liquid suction and storage layer sleeved on the body.

[0011] Optionally, a receiving space is formed between the liquid suction and storage layer and the body, and the distal end of the tube is located in the receiving space.

[0012] Optionally, the tube is used to implant and inject chemotherapy drugs or radioactive particles into the human body so that the injected chemotherapy drugs or the radioactive particles are located in the receiving space.

[0013] Optionally, the liquid suction and storage layer includes sponge, gauze, non-woven fabric, permeable membrane, liquid storage capsule or degradable membrane.

[0014] Optionally, the body includes a proximal cup section, an intermediate section, and a distal cup section that are arranged in sequence. The outer diameter of the proximal cup section and the outer diameter of the distal cup section are both greater than the outer diameter of the intermediate section, and the opening of the tube body is located outside the intermediate section.

[0015] Optionally, the stent further includes a liquid absorption and storage layer disposed outside the intermediate section. At least a part of the liquid absorption and storage layer wraps around the outside of the tube body so that the opening can absorb and release liquid through the liquid absorption and storage layer.

[0016] Optionally, the distal end of the tube body penetrates through the proximal cup section and extends to the intermediate section so that the opening is located outside the intermediate section.

[0017] Optionally, the intermediate section includes a first wire mesh portion and a first silicone portion located inside the first wire mesh portion. The first silicone portion is fixedly connected to the first wire mesh portion, and the distal end of the tube body is fixedly connected to the first wire mesh portion.

[0018] Optionally, the stent further includes a suture. The opening includes a plurality of side holes that are sequentially spaced along the axial direction of the tube body. The suture passes through the side holes and is fixedly connected to the first wire mesh portion to suture the tube body and the first wire mesh portion.

[0019] Optionally, the tube body is adhesively bonded to the intermediate section so that the tube body fits against the first wire mesh portion.

[0020] Optionally, the proximal cup section includes a second wire mesh portion and a second silicone portion located inside the second wire mesh portion, and a channel for the tube body to pass through is formed between the second wire mesh portion and the second silicone portion.

[0021] Optionally, the distal cup section includes a third wire mesh portion and a third silicone portion located inside the third wire mesh portion; the first wire mesh portion, the second wire mesh portion, and the third wire mesh portion are integrally formed; the first silicone portion, the second silicone portion, and the third silicone portion are integrally formed.

[0022] Optionally, the intermediate section includes a first covered wire mesh and a bare frame sleeving the first covered wire mesh, and the tube body is sutured and fixed to the bare frame.

[0023] Optionally, the wire mesh of the first covered wire mesh, the wire mesh of the proximal cup section, and the wire mesh of the distal cup section are integrally woven.

[0024] Optionally, a plurality of connecting rings are respectively arranged at the proximal and distal ends of the first covered wire mesh, and the bare frame is fixedly connected to the connecting rings.

[0025] Optionally, the stent further includes a liquid absorption and storage layer disposed outside the bare stent, and the liquid absorption and storage layer is fixedly connected to the connecting ring.

[0026] Optionally, the proximal cup section and the middle section are fixedly connected by a first connecting line; the distal cup section and the middle section are fixedly connected by a second connecting line.

[0027] Optionally, the proximal cup section includes a second film-covered wire frame and a communicating pipe fixedly connected to the second film-covered wire frame. The communicating pipe penetrates through the second film-covered wire frame to form a passage for the pipe body to pass through the second film-covered wire frame.

[0028] Optionally, the pipe body has mutually independent first and second channels. The opening includes a first opening communicating with the first channel and a second opening communicating with the second channel. The first channel is used for sucking and discharging liquid through the first opening, and the second channel is used for sucking and discharging liquid through the second opening; and / or,

[0029] The number of the pipe bodies is multiple, and multiple pipe bodies are all disposed outside the body, and the multiple pipe bodies are respectively used for sucking and discharging liquid.

[0030] An embodiment of the present invention further provides an introducer for implanting the above stent into the human body. The introducer includes an inner tube and a middle tube. The inner tube penetrates through the middle tube, and the middle tube has a first through hole for the pipe body of the stent to penetrate through.

[0031] Optionally, the introducer further includes an outer tube sleeving the middle tube, and a receiving cavity for receiving the body of the stent is formed between the outer tube and the inner tube. The middle tube is used to push the stent to move relative to the outer tube.

[0032] An embodiment of the present invention further provides a medical device, which includes a stent and / or an introducer. The stent includes a body and a pipe body fixedly connected to the body. The distal end of the pipe body has an opening for sucking and discharging liquid through the opening; the opening is located outside the body. The introducer includes an inner tube and a middle tube. The inner tube penetrates through the middle tube, and the middle tube has a first through hole for the pipe body of the stent to penetrate through.

[0033] The beneficial effects of the stent, introducer, and medical device according to the embodiments of the present invention include, for example:

[0034] An embodiment of the present invention provides a stent, which includes a main body and a tube fixedly connected to the main body. The distal end of the tube has an opening, and the opening is located outside the main body. When in use, the distal end of the tube is inserted into the human body lumen along with the main body. Under the action of the self-expanding performance of the main body, the distal end of the tube contacts the wall surface of the human body lumen. At the same time, the proximal end of the tube is located outside the human body, so that liquid, such as anti-inflammatory lotion, can be filled into the human body lumen through the opening of the tube, or pus, necrotic substances, etc. at the human body lumen can be sucked out. Moreover, the main body is tubular, and the formed channel inside it can ensure the smoothness of the lumen.

[0035] An embodiment of the present invention also provides an introducer, which includes an inner tube and a middle tube. The inner tube penetrates through the middle tube, and at the same time, the middle tube has a first through hole. When the above-mentioned stent is inserted into the lumen of the human body by using this introducer, the tube of the stent is inserted into the first through hole. Thus, the purpose of inserting the above-mentioned stent into the lumen of the human body is achieved through this introducer.

[0036] An embodiment of the present invention also provides a medical device, which includes the above-mentioned stent and / or introducer, and thus has all the beneficial effects of the stent and / or introducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a schematic diagram of the overall structure of the stent provided by the embodiment of the present invention;

[0039] Figure 2 It is a schematic diagram of the cross-sectional structure of the stent provided by the embodiment of the present invention;

[0040] Figure 3 It is a schematic diagram of the connection structure between the main body and the tube in the stent provided by the embodiment of the present invention;

[0041] Figure 4 For Figure 3 The enlarged schematic diagram of the local structure at position Ⅳ;

[0042] Figure 5 It is a schematic diagram of the second connection structure between the main body and the tube provided by the embodiment of the present invention;

[0043] Figure 6 For Figure 5 The enlarged schematic diagram of the local structure at position Ⅵ;

[0044] Figure 7 Schematic structural diagram of the third body of the stent provided by the embodiment of the present invention;

[0045] Figure 8 Partial structural cross-sectional schematic diagram of the third body of the stent provided by the embodiment of the present invention;

[0046] Figure 9 Schematic structural diagram of the introducer provided by the embodiment of the present invention;

[0047] Figure 10 Schematic cross-sectional structure diagram of the inner tube in the introducer provided by the embodiment of the present invention;

[0048] Figure 11 Partial structural schematic diagram of the introducer provided by the embodiment of the present invention.

[0049] Reference numerals: 10 - stent; 100 - body; 110 - proximal cup section; 111 - second grid section; 112 - second silicone section; 113 - second film-covered grid; 114 - connecting tube; 115 - limiting protrusion; 116 - tubular silicone film; 120 - middle section; 121 - first grid section; 122 - first silicone section; 123 - first film-covered grid; 124 - bare frame; 125 - connecting ring; 130 - distal cup section; 131 - third grid section; 132 - third silicone section; 141 - first connecting line; 142 - second connecting line; 143 - first retrieval line; 144 - second retrieval line; 200 - tube body; 210 - suction and release end; 220 - opening; 221 - side hole; 222 - end hole; 230 - connector; 300 - liquid absorption and storage layer; 310 - accommodation space; 400 - suture; 20 - introducer; 21 - inner tube; 23 - middle tube; 25 - outer tube; 27 - accommodation cavity; 29 - first through hole; 31 - second through hole; 33 - soft tip; 35 - developing ring; 37 - proximal handle; 39 - distal handle. Detailed implementation manners

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0052] It should be noted that like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0053] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of the present invention is customarily placed during use. This is 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 operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0054] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0055] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0056] Figure 1 It is a schematic diagram of the overall structure of the stent 10 provided in this embodiment. Figure 2 It is a schematic diagram of the cross-sectional structure of the stent 10 provided in this embodiment. Figure 3 It is a schematic diagram of the connection structure between the body 100 and the tube body 200 in the stent 10 provided in this embodiment. Please refer to Figures 1-3 In this embodiment, a stent 10 is provided. The stent 10 includes a body 100 and a tube body 200 fixedly connected to the body 100. The distal end of the tube body 200 has an opening 220, and the opening 220 is located outside the body 100. During use, the distal end of the tube body 200 is placed into the human body lumen along with the body 100. Under the action of the self-expanding performance of the body 100, the distal end of the tube body 200 contacts the wall surface of the human body lumen. At the same time, the proximal end of the tube body 200 is located outside the human body, so that liquid, such as anti-inflammatory liquid medicine, can be filled into the human body lumen through the opening 220 of the tube body 200, or pus, necrotic substances, etc. at the human body lumen can be sucked out. Moreover, the body 100 is tubular, and the formed channel therein can ensure the smoothness of the lumen.

[0057] It should be noted that in the description of this embodiment, the "proximal end" is the end close to the outside of the human body after being placed into the human body. Correspondingly, the "distal end" is the end far from the outside of the human body after being placed into the human body. For example, the end where the tube body 200 is connected to the body 100 is the distal end of the tube body 200, and the end of the tube body 200 far from the body 100 is the proximal end of the tube body 200.

[0058] The following further describes the stent 10 provided in this embodiment:

[0059] Please refer to Figures 1-3 , in this embodiment, the body 100 includes a proximal cup section 110, an intermediate section 120, and a distal cup section 130 arranged in sequence. The outer diameters of both the proximal cup section 110 and the distal cup section 130 are greater than the outer diameter of the intermediate section 120, so that the outer shape of the formed body 100 is dumbbell-shaped. The opening 220 of the tube body 200 is located outside the intermediate section 120.

[0060] Optionally, the proximal cup section 110 is a cylindrical cup, that is, the outer wall of the proximal cup section 110 is a cylindrical surface. The distal cup section 130 is a spherical cup, that is, the outer wall of the distal cup section 130 is a spherical surface. It can be understood that in other embodiments, the shape of the cup can also be specifically set according to requirements. For example, both the proximal cup section 110 and the distal cup section 130 can be set as spherical cups.

[0061] Optionally, the distal end of the tube body 200 penetrates through the proximal cup section 110 and extends to the intermediate section 120, so that the opening 220 at the distal end of the tube body 200 extends to the outside of the intermediate section 120. Specifically, the part of the tube body 200 corresponding to the proximal cup section 110 is located inside the proximal cup section 110, and the part of the tube body 200 corresponding to the intermediate section 120 is located outside the intermediate section 120.

[0062] Specifically, the distal end of the tube body 200 has a suction / discharge end 210. The opening 220 includes a plurality of side holes 221 opened on the suction / discharge end 210. The plurality of side holes 221 are sequentially opened on the side wall of the suction / discharge end 210 along the axial direction of the tube body 200. In other words, the suction / discharge end 210 of the tube body 200 is the part from the distal end face of the tube body 200 to the position of the side hole 221 farthest from the distal end face. The suction / discharge end 210 is correspondingly located outside the intermediate section 120, that is, along the radial direction of the body 100, the entire suction / discharge end 210 is located radially outside the intermediate section 120. Optionally, the opening 220 further includes an end hole 222 located at the end of the suction / discharge end 210. Specifically, the end hole 222 is formed by the inner cavity of the tube body 200 penetrating through the distal end face of the tube body 200.

[0063] Optionally, the number of the tube bodies 200 is multiple, and the multiple tube bodies 200 are all located outside the body 100. The multiple tube bodies 200 are respectively used for suction and discharge of liquid. Therefore, during use, some of the multiple tube bodies 200 can be used for suction according to requirements, and another part of the multiple tube bodies 200 can be used for discharge, that is, the stent 10 can perform suction and discharge simultaneously to further meet the use requirements. Specifically, the number of the tube bodies 200 is two, and the two tube bodies 200 are arranged along the circumferential direction of the body 100. It can be understood that in other embodiments, the two tube bodies 200 can also be sleeved with each other, that is, the two tube bodies 200 are coaxially arranged. It can also be understood that in other embodiments, the number of the tube bodies 200 can also be set according to requirements.

[0064] It should be noted that in this embodiment, by setting the number of the tube bodies 200 to be multiple to achieve simultaneous liquid suction and discharge, it can be understood that in other embodiments, the tube body 200 can also be set as a multi-chamber tube to achieve simultaneous liquid suction and discharge. Exemplarily, the tube body 200 is set as a double-chamber tube, that is, a first channel and a second channel independent of each other are arranged in the tube body 200. For example, the cylindrical inner cavity of the tube body 200 is divided into two semi-cylindrical channels to form the independent first channel and second channel. The opening 220 includes a first opening communicating with the first channel and a second opening communicating with the second channel. The first channel sucks and discharges liquid through the first opening, and the second channel sucks and discharges liquid through the second opening. Since the first channel and the second channel are independent of each other, liquid injection can be carried out through the first channel while liquid suction can be carried out through the second channel according to requirements.

[0065] Optionally, the stent 10 further includes a liquid suction and storage layer 300. At least part of the liquid suction and storage layer 300 is coated outside the tube body 200, so that the opening 220 sucks and discharges liquid through the liquid suction and storage layer 300. By arranging the liquid suction and storage layer 300, when the tube body 200 is used for liquid discharge, the liquid flowing out of the tube body 200 from the opening 220 is first absorbed and stored by the liquid suction and storage layer 300 and slowly released. Then, through the contact between the liquid suction and storage layer 300 and the wall surface of the human body lumen, the liquid acts on the wall surface of the human body lumen and is slowly released, which not only ensures the effective contact between the liquid and the wall surface of the human body lumen, but also due to the liquid storage function of the liquid suction and storage layer 300, the liquid (such as chemotherapy drugs, etc.) is slowly released and acts on the diseased part of the patient. Because it can act on the affected part for a long time, it has a good therapeutic effect. At the same time, when it is necessary to suck out the pus and the like secreted by the lumen of the human body through the tube body 200, the pus and the like are first collected in the liquid suction and storage layer 300 through the liquid suction function of the liquid suction and storage layer 300, which helps to ensure the liquid suction effect of the tube body 200. Then, by connecting the tube body 200 to negative pressure, the pus in the liquid suction and storage layer 300 is sucked out of the body. At the same time, the liquid suction and storage layer 300 can buffer the suction force and avoid unnecessary damage to the human body during the suction process.

[0066] Specifically, the stent 10 can also be used for the treatment of fistulas, such as esophageal fistulas. During use, the stent 10 is placed into the esophagus at the position corresponding to the fistula, and the liquid suction and storage layer 300 is tightly attached to the fistula tissue by using the self-expansion performance of the main body 100. At the same time, since a channel is formed through the middle of the main body 100, the patency of the esophagus is ensured through this channel and it is convenient for the patient to eat. Moreover, through the tube body 200, liquid such as pus in the fistula can be lavaged and drained, and the pus and necrotic substances on the liquid suction and storage layer 300 can be sucked out, promoting the healing of the fistula and achieving the treatment purpose.

[0067] Optionally, the liquid absorption and storage layer 300 is annular, and the annular liquid absorption and storage layer 300 is sleeved on the main body 100, so as to cover the pipe body 200 located outside the main body 100. Specifically, the liquid absorption and storage layer 300 is located outside the middle section 120. Correspondingly, the liquid absorption and storage layer 300 is sleeved on the middle section 120. The length dimension of the liquid absorption and storage layer 300 is adapted to the length dimension of the middle section 120, which can not only ensure that the liquid absorption and storage layer 300 covers the middle section 120 as a whole, but also, since the outer diameters of both the proximal cup section 110 and the distal cup section 130 are larger than the outer diameter of the middle section 120, the axial two ends of the annular liquid absorption and storage layer 300 sleeved outside the middle section 120 are respectively limited by the proximal cup section 110 and the distal cup section 130.

[0068] Optionally, the liquid absorption and storage layer 300 includes sponge. Specifically, the liquid absorption and storage layer 300 is an overall tubular annular member made of sponge, and the liquid absorption and storage are realized through the characteristics of the sponge itself. It can be understood that in other embodiments, other materials can also be used to make the liquid absorption and storage layer 300, such as gauze, non-woven fabric, permeable membrane, liquid storage capsule or degradable membrane. By setting multiple layers of gauze or non-woven fabric, the liquid absorption effect and the buffering effect on the suction force can be ensured. Obviously, other materials capable of realizing liquid absorption and storage can also be used to make the liquid absorption and storage layer 300.

[0069] Optionally, the liquid absorption and storage layer 300 is sleeved outside the middle section 120, so as to form an annular accommodation space 310 between the inner wall of the liquid absorption and storage layer 300 and the outer wall of the middle section 120. The distal end of the pipe body 200 is located in the accommodation space 310, that is, the liquid suction and discharge end 210 of the pipe body 200 is clamped between the middle section 120 and the liquid absorption and storage layer 300, so as to realize the covering of the liquid suction and discharge end 210 of the pipe fitting by the liquid absorption and storage layer 300. Optionally, when the stent 10 provided in this embodiment is used, slow-release chemotherapy drugs such as chemotherapy drugs or radioactive particles can also be injected into the human body through the pipe body 200. After the chemotherapy drugs or radioactive particles are injected leave the pipe body 200 from the opening 220, they are accommodated in the accommodation space 310.

[0070] It should be noted that in this embodiment, the pipe body 200 is fixedly connected to the middle section 120, and the liquid suction and discharge end 210 of the pipe body 200 is clamped between the middle section 120 and the liquid absorption and storage layer 300, that is, the liquid absorption and storage layer 300 covers the side of the liquid suction and discharge end 210 away from the middle section 120. It can be understood that in other embodiments, according to requirements, the liquid suction and discharge end 210 of the pipe body 200 can also be penetrated inside the liquid absorption and storage layer 300, and then the connection between the pipe body 200 and the middle section 120 is realized through the liquid absorption and storage layer 300. At this time, the liquid absorption and storage layer 300 wraps the liquid suction and discharge end 210 of the pipe body 200.

[0071] Optionally, the tube body 200 is fixed to the middle section 120 by suturing. Specifically, the stent 10 further includes a suture 400 that passes through a plurality of side holes 221 axially opened in the tube body 200 and the middle section 120, thereby fixing the tube body 200 to the middle section 120. Optionally, the tube body 200 is bonded to the middle section 120 to ensure that the tube body 200 fits against the middle section 120. Specifically, the bonding between the tube body 200 and the middle section 120 is achieved by means of silicone film patching treatment.

[0072] Please continue to refer to Figures 1-3 In this embodiment, the main body 100 includes a fully covered stent and a bare stent 124. The fully covered stent includes a second covered wire mesh 113, a first covered wire mesh 123, and a third covered wire mesh that are connected in sequence. The second covered wire mesh 113 forms the proximal cup section 110 of the main body 100; the third covered wire mesh forms the distal cup section 130 of the main body 100; the first covered wire mesh 123 is sleeved with the bare stent 124 to form the middle section 120 of the main body 100. In other words, the middle section 120 includes the first covered wire mesh 123 and the bare stent 124 sleeved on the first covered wire mesh 123.

[0073] Specifically, the fully covered stent includes a wire mesh with larger radial dimensions at both ends and smaller radial dimensions in the middle. The fully covered stent is formed by covering the entire wire mesh with a film. The two ends with larger radial dimensions in the wire mesh are respectively formed into the second covered wire mesh 113 and the third covered wire mesh, and the middle part with smaller radial dimensions in the wire mesh is formed into the first covered wire mesh 123. The wire mesh of the fully covered stent is integrally made by weaving metal wires. In other words, the wire mesh of the second covered wire mesh 113, the wire mesh of the proximal cup section 110, and the wire mesh of the distal cup section 130 are integrally woven.

[0074] The bare stent 124 is a metal wire mesh. Specifically, the bare stent 124 is formed by weaving metal wires. In other words, the difference between the bare stent 124 and the first covered wire mesh 123 can be regarded as whether it is covered with a film. Optionally, the material of the metal wire is nitinol.

[0075] By arranging the bare stent 124 outside the first covered wire mesh 123, during connection, the suture 400 is arranged through the mesh holes on the bare stent 124, that is, the tube body 200 is sutured and fixed on the bare stent 124 by the suture 400, so as to avoid damaging the film on the first covered wire mesh 123 during suturing and ensure the airtight performance of the annular accommodation space 310 on the radial inner side. In this way, when the tube body 200 is connected to negative pressure for suction, the pus and necrotic substances in the liquid suction and storage layer 300 can be sucked out to achieve the treatment purpose.

[0076] Figure 4 For Figure 3 the enlarged schematic view of the local structure at position Ⅳ in Figure 3 and Figure 4, optionally, a plurality of connecting rings 125 are respectively arranged at the proximal end and the distal end of the first film-covered wire frame 123. The plurality of connecting rings 125 are all located on the outer peripheral wall of the first film-covered wire frame 123, and the bare frame 124 is fixedly connected to the connecting rings 125. Specifically, a part of the plurality of connecting rings 125 is arranged at the proximal end of the first film-covered wire frame 123, and this connecting ring 125 is the first connecting ring. The remaining part of the plurality of connecting rings 125 is arranged at the distal end of the first film-covered wire frame 123, and this connecting ring 125 is the second connecting ring. Both ends of the bare frame 124 are fixedly connected to the first connecting ring and the second connecting ring respectively.

[0077] Optionally, both ends of the bare frame 124 are respectively tied and fixed to the first connecting ring and the second connecting ring, and both ends of the liquid absorption and storage layer 300 are respectively fixedly connected to the first connecting ring and the second connecting ring. Optionally, the number of both the first connecting ring and the second connecting ring is a plurality, and the plurality of first connecting rings and the plurality of second connecting rings are respectively evenly distributed along the circumferential direction of the first film-covered wire frame 123. In this embodiment, the number of both the first connecting ring and the second connecting ring is six. It can be understood that in other embodiments, the number of the first connecting ring and the second connecting ring can also be specifically set according to requirements.

[0078] During production, first, a mesh structure with the same contour as the fully film-covered stent is formed by weaving metal wires. Then, the connecting rings are fixedly connected to both ends of the part with a smaller radial dimension in the middle of the mesh structure, and a mandrel is inserted through the end with a larger radial dimension of the mesh structure. Subsequently, film covering is carried out to make the fully film-covered stent. At the same time, after the mandrel is taken out, a tubular silicone film 116 is formed at this position for the tube body 200 to pass through. One end of the fully film-covered stent with the tubular silicone film 116 is the proximal cup section 110, and correspondingly, the other end of the fully film-covered stent is the distal cup section 130. Then, the bare frame 124 is sleeved on the first film-covered wire frame 123, and both ends of the bare frame 124 are respectively tied and fixed to the first connecting ring and the second connecting ring through wires, thus making the body 100. After that, the tube body 200 is inserted into the tubular silicone film 116, and the opening 220 of the tube body 200 is located radially outside the bare frame 124, that is, outside the middle section 120, and is fixedly connected to the bare frame 124 by sewing. Finally, the liquid absorption and storage layer 300 is sleeved on the middle section 120 and both the proximal end and the distal end of the liquid absorption and storage layer 300 are tied and fixed to the first connecting ring and the second connecting ring.

[0079] Optionally, the connecting ring 125 is a ring structure formed by winding soft wires.

[0080] It should be noted that the specific structure of the body 100 is not limited here. It can be understood that in other embodiments, the structure of the body 100 can also be specifically set according to requirements.

[0081] As an example, Figure 5Schematic diagram of the second connection structure between the body 100 and the tube body 200 provided in this embodiment. Please refer to Figure 5 , the second body 100 includes a segmented fully covered stent and a bare stent 124. The segmented fully covered stent includes multiple segmented covered wire meshes, and adjacent two segments are connected by connecting lines. Specifically, the segmented fully covered stent 10 includes a second covered wire mesh 113, a first covered wire mesh 123, and a third covered wire mesh that are connected in sequence. The second covered wire mesh 113 is used to form the proximal cup section 110 of the body 100; the third covered wire mesh is used to form the distal cup section 130 of the body 100; a bare stent 124 is sleeved outside the first covered wire mesh 123 to form the middle section 120 of the body 100. In other words, the middle section 120 includes the first covered wire mesh 123 and the bare stent 124 sleeved on the first covered wire mesh 123. The connecting lines include a first connecting line 141 and a second connecting line 142. The proximal cup section 110 and the middle section 120 are fixedly connected by the first connecting line 141, and the distal cup section 130 and the middle section 120 are fixedly connected by the second connecting line 142. Optionally, both the first connecting line 141 and the second connecting line 142 are polytetrafluoroethylene (PTFE) flexible wires.

[0082] It should be noted that the covered wire mesh is a structure formed by performing a covering treatment on a metal wire mesh. Specifically, first, metal wires are woven to form mesh structures respectively having outer dimensions corresponding to the first covered wire mesh 123, the second covered wire mesh 113, and the third covered wire mesh, and then the three mesh structures are subjected to a full covering treatment to form the first covered wire mesh 123, the second covered wire mesh 113, and the third covered wire mesh. Then, a bare stent 124 is sleeved outside the first covered wire mesh 123 to form the middle section 120, and the second covered wire mesh 113 and the third covered wire mesh are respectively connected to both ends of the middle section 120 through the first connecting line 141 and the second connecting section, and finally, the covering treatment is performed on the first connecting line 141 and the second connecting line 142, so as to form a body 100 with both ends having cup mouths and the inside of the middle section 120 being fully covered, and the outside of the middle section 120 being a bare stent 124.

[0083] Figure 6 For Figure 5 the enlarged schematic diagram of the local structure at VI in Figure 5 and Figure 6, Optionally, the proximal cup section 110 further includes a connecting pipe 114. The connecting pipe 114 is disposed on the second film-covered wire frame 113 and penetrates through the second film-covered wire frame 113, so as to form a channel for the pipe body 200 to pass through the second film-covered wire frame 113 of the proximal cup section 110 through the connecting pipe 114. In other words, this channel is the through-channel formed by the inner cavity of the connecting pipe 114. Specifically, the connecting pipe 114 includes a cylindrical pipe section and a limiting protrusion 115 protruding radially outward at one end of the pipe section. Before covering the wire frame with a film to form the second film-covered wire frame 113, first pass the connecting pipe 114 through the mesh holes of the wire frame, and make the limiting protrusion 115 of the connecting pipe 114 contact the metal wire forming the wire frame to realize the limitation of the connecting pipe 114, and then cover the wire frame with a film to form the proximal cup section 110.

[0084] Optionally, the connecting pipe 114 is made of silicone, that is, the connecting pipe 114 is made of a soft material, which can not only prevent the connecting pipe 114 from restricting the extending direction of the pipe body 200, but also ensure the sealing effect between the pipe body 200 and the connecting pipe 114 through the close contact between the inner wall of the connecting pipe 114 and the pipe body 200.

[0085] As an example, Figure 7 shows a schematic structural view of the third body 100 of the stent 10 provided in this embodiment, Figure 8 For Figure 7 a cross-sectional view of a partial structure of the third body 100 shown in Figure 7 and Figure 8 . Please refer to

[0086] Specifically, the wire frame part is a metal mesh tube, which includes a second wire frame part 111, a first wire frame part 121 and a third wire frame part 131 connected in sequence. Optionally, the wire frame part is formed by weaving metal wires. Optionally, the metal wire is a nitinol alloy wire.

[0087] The silicone part is a silicone film with a shape adapted to the grid part, which includes a second silicone part 112, a first silicone part 122, and a third silicone part 132 connected in sequence. The whole silicone part is located inside the grid part. The outer wall of the second silicone part 112 fits the inner wall of the second grid part 111, so as to form a proximal cup section 110 through the second silicone part 112 and the second grid part 111. The outer wall of the first silicone part 122 fits the inner wall of the first grid part 121, so as to form an intermediate section 120 through the first silicone part 122 and the first grid part 121. The outer wall of the third silicone part 132 fits the inner wall of the third grid part 131, so as to form a distal cup section 130 through the third silicone part 132 and the third grid part 131.

[0088] By adhering the silicone part to the grid part, each mesh hole on the grid part is sealed, so that the radial inner side of the accommodation space 310 is kept airtight. At the same time, since the silicone part is arranged inside the grid part, correspondingly, the grid part is located outside the silicone part, and the wire of the grid part protrudes from the outer wall of the silicone part. Thus, when the tube body 200 is sutured and fixed to the intermediate section 120 through the suture 400, the suture 400 can pass through the wire mesh hole of the first grid part 121, thus avoiding the problem of damaging the silicone part and affecting the sealing effect of the accommodation space 310.

[0089] Optionally, a channel (not shown in the figure) is formed between the second grid part 111 and the second silicone part 112. The tube body 200 passes through the channel and exits from the mesh hole at the distal end of the second grid part 111 so that the distal end of the tube body 200 is located outside the intermediate section 120. Specifically, the channel extends along the axial direction of the body 100. Since the second grid part 111 and the second silicone part 112 are fixed by gluing, when bonding the second grid part 111 and the second silicone part 112, only the circumferential part of the second silicone part 112 is coated with glue to reserve a certain area in the circumferential part of the second silicone part 112. When the second grid part 111 is fixed outside the second silicone part 112, the uncoated area on the second silicone part 112 and the second grid part 111 are in a separable fitting state, so that an external force can be applied to make this part in a separated state to form a channel for the tube body 200 to pass through.

[0090] Optionally, the first grid part 121, the second grid part 111, and the third grid part 131 are integrally formed. Specifically, the second grid part 111, the first grid part 121, and the third grid part 131 are integrally formed by wire weaving. The first silicone part 122, the second silicone part 112, and the third silicone part 132 are integrally formed. Specifically, the first silicone part 122, the second silicone part 112, and the third silicone part 132 are integrally formed by silicone injection molding.

[0091] Specifically, a grid part and a silica gel part that are adapted to each other are prefabricated, and then the grid part is bonded to the outside of the silica gel part by an adhesive to form the main body 100. The distal end of the tube body 200 passes through the channel formed between the second grid part 111 and the second silica gel part 112 and extends to the outside of the middle section 120. A suture 400 passes through the side hole 221 of the tube body 200 and the mesh hole of the first grid part 121, so as to suture and fix the tube body 200 to the middle section 120. The fixing effect is good, and at the same time, the breakage of the second silica gel part 112 can be avoided. Then, the tube body 200 is bonded to the middle section 120 by means of film patching treatment to ensure that the tube body 200 fits well with the middle section 120. Finally, the liquid absorption and storage layer 300 is sleeved outside the middle section 120, and the tube body 200 is located in the accommodation space 310 inside the liquid absorption and storage layer 300 and outside the middle section 120, so as to ensure that the opening 220 of the tube body 200 can pass through the liquid absorption and storage layer 300 when sucking and discharging liquid.

[0092] Please refer to Figure 1 , in this embodiment, the stent 10 further includes a joint 230, and the joint 230 is connected to the proximal end of the tube body 200, so as to realize the connection between the tube body 200 and a negative pressure device (not shown in the figure) or an injection device (not shown in the figure) through the joint 230. Optionally, the joint 230 is detachably connected to the tube body 200. Optionally, the joint 230 is a Luer joint.

[0093] Please continue to refer to Figure 1 , in this embodiment, the stent 10 further includes recovery lines arranged at both ends of the main body 100. Specifically, the recovery lines include a first recovery line 143 arranged at the proximal end of the proximal cup section 110 and a second recovery line 144 arranged at the distal end of the distal cup section 130. The cup mouth can be tightened through the recovery lines, which is convenient for the removal of the stent 10.

[0094] Taking the working process of the stent 10 when used for treating esophageal fistula as an example, the working principle of the stent 10 will be described according to the stent 10 provided in this embodiment:

[0095] When in use, the stent 10 is placed in the digestive tract at the corresponding lesion position, and the liquid absorbing and storing layer 300 is pressed against the wall of the digestive tract by the self-expansion performance of the body 100, so that the liquid absorbing and storing layer 300 is closely attached to the fistula tissue of the digestive tract, thereby achieving the occlusion of the fistula, and at the same time, the pus secreted by the fistula tissue and the necrotic matter therein enter the liquid absorbing and storing layer 300. The distal end of the tube body 200 enters the digestive tract along with the body 100, and corresponds to the position of the fistula tissue, and the proximal end of the tube body 200 extends to the outside of the human body. When suction is required, the joint 230 at the proximal end of the tube body 200 is connected to the negative pressure device, and the pus and necrotic matter entering the liquid absorption storage layer 300 are sucked out of the human body under the action of negative pressure; when injection is required, the joint 230 at the proximal end of the tube body 200 is connected to the injection device, and the liquid injected into the tube body 200 by the injection device flows along with the tube body 200 and flows from the opening 220 to the liquid absorption storage layer 300, and the fistula is irrigated through the liquid absorption storage layer 300; when it is necessary to absorb and release liquid at the same time, at least one joint 230 of the tube body 200 is connected to the injection device, and at least one joint 230 of the tube body 200 is connected to the negative pressure device; thereby promoting the healing of the digestive tract fistula.

[0096] The bracket 10 provided in this embodiment has at least the following advantages:

[0097] The stent 10 provided by the embodiment of the present invention realizes the function of absorbing and releasing liquid into the human body lumen by arranging the tube body 200 outside the main body 100. The main body 100 is hollow inside, so that the patency of the human body lumen can be ensured. At the same time, a liquid absorbing and storing layer 300 is arranged outside the main body 100. The liquid absorbing and storing layer 300 is closely attached to the lumen wall under the effect of the self-expansion performance of the main body 100. The tube body 200 absorbs and releases liquid through the liquid absorbing and storing layer 300, thereby reducing the influence of the suction force on the human body lumen tissue. Moreover, the liquid absorbing and storing layer 300 can absorb and store pus secreted by the human body, thereby ensuring the absorption effect of the tube body 200 when absorbing pus, and further ensuring the treatment effect.

[0098] Figure 9 This is a schematic diagram of the structure of the inserter 20 provided in this embodiment. Figure 10 This is a schematic diagram of the cross-sectional structure of the inner tube 21 in the inserter 20 provided in this embodiment. Figure 9 and Figure 10 This embodiment also provides an inserter 20, through which the inserter 20 can be inserted Figures 1-8 The stent 10 shown is placed in a human body lumen. The inserter 20 includes an inner tube 21 and a middle tube 23, wherein the inner tube 21 passes through the middle tube 23, and the middle tube 23 has a first through hole 29. When the inserter 20 is used to place the stent 10 into a human body lumen, the tube body 200 of the stent 10 passes through the first through hole 29.

[0099] Specifically, the middle tube 23 is a tubular member with two channels inside. The cross-sections of both channels are circular, and the two circles intersect. One of the two channels is coaxially arranged with the middle tube 23, and this channel serves as the first through hole 29 for the tube body 200 of the stent 10 to pass through; the other of the two channels is eccentrically arranged relative to the middle tube 23, and this channel serves as the second through hole 31 for the inner tube 21 to pass through. The lumen of the inner tube 21 is used for the guide wire to pass through, so as to guide the distal end of the introducer 20 into the human body through the guide wire. Optionally, the inner tube 21 is fixedly connected to the middle tube 23. Optionally, the inner tube 21 is fixedly connected to the middle tube 23 by gluing.

[0100] Figure 11 is a partial structural schematic diagram of the introducer 20 provided in this embodiment. Please refer to Figure 11 , in this embodiment, the introducer 20 further includes an outer tube 25. The outer tube 25 is sleeved outside the middle tube 23, and a receiving cavity 27 for accommodating the body 100 of the stent 10 is formed between the outer tube 25 and the inner tube 21. The middle tube 23 is used to push the stent 10 to move relative to the outer tube 25, so as to push the stent 10 out of the receiving cavity 27.

[0101] Specifically, the distal end face of the outer tube 25 protrudes from the distal end face of the middle tube 23, and at the same time, the distal end face of the inner tube 21 protrudes from the distal end face of the middle tube 23. In other words, the distal end faces of both the outer tube 25 and the inner tube 21 are located on the side away from the proximal end of the distal end face of the middle tube 23, so as to form a receiving cavity 27 for accommodating the body 100 of the stent 10 between the distal end face of the middle tube 23 away from the proximal end and between the outer tube 25 and the inner tube 21. Before implantation, the tube body 200 of the stent 10 passes through the first through hole 29 of the middle tube 23, and the body 100 is shrunk and accommodated in the receiving cavity 27, and it is ensured that the body 100 is completely located inside the outer tube 25; after the body 100 reaches the preset position (such as the lesion of the human body lumen) with the introducer 20, the middle tube 23 is operated to move relative to the outer tube 25, and the middle tube 23 thus pushes the stent 10 to move relative to the outer tube 25, so as to push the stent 10 out of the outer tube 25, and the stent 10 is released at this preset position. It should be noted that when the middle tube 23 pushes the stent 10 to move relative to the outer tube 25 and pushes the stent 10 out of the receiving cavity 27, the distal end face of the middle tube 23 moves to the side away from the proximal end of the distal end face of the outer tube 25 (as Figure 9 shown).

[0102] Please refer to Figure 7 , optionally, the introducer 20 further includes a distal handle 39 and a proximal handle 37. The outer tube 25 is fixedly connected to the distal handle 39, and the middle tube 23 is fixedly connected to the proximal handle 37 through a booster tube. In this way, when operating, by changing the distance between the proximal handle 37 and the distal handle 39, the relative movement between the middle tube 23 and the outer tube 25 can be realized, and thus the release of the stent 10 can be realized.

[0103] Optionally, a developing ring 35 (such as Figure 9 As shown), the developing ring 35 can be developed under X-rays, so that when implanted, the doctor can confirm the release position of the stent 10 through the development of the developing ring 35 under X-rays.

[0104] Optionally, the inserter 20 further includes a soft head 33 disposed at the distal end of the inner tube 21, so that the strength of the inner tube 21 is increased by the soft head 33. Meanwhile, the soft head 33 is conical, specifically, the soft head 33 is a double-headed cone, that is, the radial dimension of the middle part of the soft head 33 is the largest, and the radial dimension of the soft head 33 gradually decreases from the middle to the two ends.

[0105] The embodiment of the present invention further provides a medical device (not shown), which includes an inserter 20 and / or a stent 10. The stent 10 is disposed inside the inserter 20, and the tube 200 of the stent 10 is inserted through the first through hole 29 of the inserter 20, and the body 100 of the stent 10 is located in the accommodating cavity 27 of the inserter 20. Since the medical device includes the inserter 20 and / or the stent 10, it also has all the beneficial effects of the inserter 20 and / or the stent 10.

[0106] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A bracket, characterized in that, The stent (10) includes a body (100) and a tube body (200) connected to the body (100). The distal end of the tube body (200) has an opening (220) for liquid suction and discharge through the opening (220); the opening (220) is located outside the body (100); The stent (10) further includes a liquid absorption and storage layer (300) disposed outside the body (100). At least a part of the liquid absorption and storage layer (300) covers the tube body (200) so that the opening (220) sucks and discharges liquid through the liquid absorption and storage layer (300); The liquid absorption and storage layer (300) sleeves the body (100); The body (100) is tubular; The body (100) includes a proximal cup section (110), an intermediate section (120), and a distal cup section (130) arranged in sequence; An accommodation space (310) is formed between the liquid absorption and storage layer (300) and the body (100). The distal end of the tube body (200) is located in the accommodation space (310). The distal end of the tube body (200) has a liquid suction and discharge end (210). The opening (220) includes a plurality of side holes (221) opened on the liquid suction and discharge end (210), and the liquid suction and discharge end (210) is correspondingly located outside the intermediate section (120).

2. The bracket according to claim 1, wherein, The liquid absorption and storage layer (300) is annular; 3. The bracket according to claim 1, wherein The tube body (200) is used to implant an injection chemotherapy drug or radioactive particles into the human body so that the injection chemotherapy drug or the radioactive particles are located in the accommodation space (310); 4. The bracket according to claim 1, characterized in that, The liquid absorption and storage layer (300) includes sponge, gauze, non-woven fabric, permeable membrane, liquid storage capsule or degradable membrane; 5. The bracket according to any one of claims 1-4, characterized in that, The tube body (200) has mutually independent first and second channels inside. The opening (220) includes a first opening communicating with the first channel and a second opening communicating with the second channel. The first channel is used for liquid suction and discharge through the first opening, and the second channel is used for liquid suction and discharge through the second opening; and / or, The number of the tube bodies (200) is multiple. Multiple tube bodies (200) are all arranged outside the body (100), and the multiple tube bodies (200) are respectively used for liquid suction and discharge.

6. A bracket, characterized in that, The stent (10) includes a body (100) and a tube body (200) connected to the body (100). The distal end of the tube body (200) has an opening (220) for liquid suction and discharge through the opening (220); the opening (220) is located outside the body (100); The body (100) includes a proximal cup section (110), an intermediate section (120), and a distal cup section (130) arranged in sequence. The outer diameters of both the proximal cup section (110) and the distal cup section (130) are larger than the outer diameter of the intermediate section (120), and the opening (220) of the tube body (200) is located outside the intermediate section (120); The bracket (10) further includes a liquid absorption and storage layer (300) disposed outside the middle section (120), and at least a part of the liquid absorption and storage layer (300) is wrapped around the outer side of the tube body (200) so that the opening (220) can absorb and release liquid through the liquid absorption and storage layer (300). The main body (100) is tubular. An accommodation space (310) is formed between the liquid absorption and storage layer (300) and the main body (100), and the distal end of the tube body (200) is located in the accommodation space (310); the distal end of the tube body (200) has a liquid absorption and release end (210), and the opening (220) includes a plurality of side holes (221) opened on the liquid absorption and release end (210), and the liquid absorption and release end (210) is correspondingly located outside the middle section (120).

7. The bracket according to claim 6, wherein, The distal end of the tube body (200) penetrates through the proximal cup section (110) and extends to the middle section (120) so that the opening (220) is located outside the middle section (120).

8. The bracket according to claim 6, wherein, The middle section (120) includes a first wire mesh part (121) and a first silica gel part (122) located inside the first wire mesh part (121). The first silica gel part (122) is fixedly connected to the first wire mesh part (121), and the distal end of the tube body (200) is fixedly connected to the first wire mesh part (121).

9. The bracket according to claim 8, wherein The bracket (10) further includes a suture (400), and the suture (400) passes through the side hole (221) and is fixedly connected to the first wire mesh part (121) to suture the tube body (200) and the first wire mesh part (121).

10. The bracket according to claim 8, wherein, The tube body (200) is adhered to the middle section (120) so that the tube body (200) fits with the first wire mesh part (121).

11. The bracket according to claim 8, wherein, The proximal cup section (110) includes a second wire mesh part (111) and a second silica gel part (112) located inside the second wire mesh part (111), and a channel for the tube body (200) to pass through is formed between the second wire mesh part (111) and the second silica gel part (112).

12. The bracket according to claim 11, wherein, The distal cup section (130) includes a third wire mesh part (131) and a third silica gel part (132) located inside the third wire mesh part (131); the first wire mesh part (121), the second wire mesh part (111), and the third wire mesh part (131) are integrally formed; the first silica gel part (122), the second silica gel part (112), and the third silica gel part (132) are integrally formed.

13. The bracket according to claim 6, characterized in that, The proximal cup section (110) includes a second coated wire mesh (113) and a connecting pipe (114) fixedly connected to the second coated wire mesh (113). The connecting pipe (114) penetrates through the second coated wire mesh (113) to form a channel for the tube body (200) to pass through the second coated wire mesh (113).

14. The stent according to any one of claims 6-13, characterized in that, The tube body (200) has a first channel and a second channel that are independent of each other. The opening (220) includes a first opening communicating with the first channel and a second opening communicating with the second channel. The first channel is used for sucking and discharging liquid through the first opening, and the second channel is used for sucking and discharging liquid through the second opening; and / or, The number of the tube bodies (200) is multiple. A plurality of the tube bodies (200) are all arranged outside the body (100), and the plurality of tube bodies (200) are respectively used for sucking and discharging liquid.

15. A bracket, characterized in that, The stent (10) includes a body (100) and a tube body (200) connected to the body (100). The distal end of the tube body (200) has an opening (220) for sucking and discharging liquid through the opening (220); the opening (220) is located outside the body (100); The body (100) includes a proximal cup mouth section (110), an intermediate section (120), and a distal cup mouth section (130) arranged in sequence. The outer diameters of both the proximal cup mouth section (110) and the distal cup mouth section (130) are larger than the outer diameter of the intermediate section (120). The opening (220) of the tube body (200) is located outside the intermediate section (120); The intermediate section (120) includes a first film-covered wire frame (123) and a bare frame (124) sleeving the first film-covered wire frame (123). The tube body (200) is sutured and fixed to the bare frame (124); A plurality of connecting rings (125) are respectively arranged at the proximal end and the distal end of the first film-covered wire frame (123). The bare frame (124) is fixedly connected to the connecting rings (125); The stent (10) further includes a liquid absorption and storage layer (300) arranged outside the bare frame (124). The liquid absorption and storage layer (300) is fixedly connected to the connecting rings (125); The body (100) is tubular; An accommodation space (310) is formed between the liquid absorption and storage layer (300) and the body (100). The distal end of the tube body (200) is located in the accommodation space (310); the distal end of the tube body (200) has a liquid suction and discharge end (210). The opening (220) includes a plurality of side holes (221) opened on the liquid suction and discharge end (210), and the liquid suction and discharge end (210) is correspondingly located outside the intermediate section (120).

16. The bracket according to claim 15, wherein The wire frame of the first film-covered wire frame (123) is integrally woven with the wire frames of the proximal cup mouth section (110) and the distal cup mouth section (130).

17. The bracket according to claim 15, wherein The proximal cup mouth section (110) is fixedly connected to the intermediate section (120) through a first connecting line (141); the distal cup mouth section (130) is fixedly connected to the intermediate section (120) through a second connecting line (142).

18. The bracket according to claim 15, wherein, The proximal cup section (110) includes a second membrane network (113) and a communication tube (114) fixedly connected to the second membrane network (113). The communication tube (114) penetrates the second membrane network (113) to form a passage for the tube body (200) to pass through the second membrane network (113).

19. The stent according to any one of claims 15 - 18, characterized in that, The tube body (200) has an independent first channel and a second channel therein. The opening (220) includes a first opening communicating with the first channel and a second opening communicating with the second channel. The first channel is used for sucking and discharging liquid through the first opening, and the second channel is used for sucking and discharging liquid through the second opening; and / or The number of the tube bodies (200) is multiple. A plurality of the tube bodies (200) are all arranged on the outer side of the body (100), and the plurality of the tube bodies (200) are respectively used for sucking and discharging liquid.

20. An introducer for implanting the stent (10) according to any one of claims 1-19 into a human body, characterized in that, The introducer (20) includes an inner tube (21) and a middle tube (23). The inner tube (21) penetrates the middle tube (23), and a first through hole (29) for the tube body (200) of the stent (10) to penetrate is formed in the middle tube (23).

21. The inserter according to claim 20, characterized in that, The introducer (20) further includes an outer tube (25). The outer tube (25) sleeves the middle tube (23), and a receiving cavity (27) for receiving the body (100) of the stent (10) is formed between the outer tube (25) and the inner tube (21). The middle tube (23) is used for pushing the stent (10) to move relative to the outer tube (25).

22. A medical device, characterized in that, Comprising the stent (10) according to any one of claims 1-19 and / or the introducer (20) according to any one of claims 20-21.

Images