Interventional stent conversion assembly, interventional hemostatic stent and assembling method

Abstract

The embodiment of the invention provides an interventional stent conversion assembly, an interventional hemostatic stent and an assembling method, and belongs to the technical field of medical instruments. The interventional stent conversion assembly comprises a lining piece and an elastic piece arranged on the lining piece in a sleeving mode, the lining piece comprises a main body part used for supporting the elastic piece and a traction part, and the main body part is of a cylindrical structure formed by spirally winding a strip-shaped piece; the main body part is provided with a first end and a second end which are opposite, and the main body part is provided with a cavity extending in the axial direction; one end of the traction part is connected with a strip-shaped piece forming the first end of the main body part, and the other end penetrates through the cavity of the main body part and extends out of the second end of the main body part; the elastic piece is of a sleeve-shaped structure and can elastically deform in the radial direction, and when the elastic piece is arranged on the main body part in a sleeving mode, the elastic piece is expanded in the radial direction and attached to the main body part. By means of the interventional stent conversion assembly, a common interventional stent can be rapidly converted into an interventional hemostatic stent, and rapid response treatment of sudden ischemic diseases is completed.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to an interventional stent conversion assembly, an interventional hemostatic stent, and an assembly method. Background Art

[0002] According to the type of indication, interventional devices can be divided into ischemic vascular disease devices and hemorrhagic vascular disease devices. Ischemic vascular disease is mainly caused by ischemia of organs or parts due to the inability to smoothly and adequately supply blood to blood vessels that have not yet been blocked or stenosis. Hemorrhagic vascular disease is mainly caused by aneurysms caused by long-term pressure on some blood vessels or local vascular rupture caused by other reasons.

[0003] For ischemic vascular disease, ordinary interventional stents can be placed at the target location in the blood vessel to achieve the treatment of ischemic vascular disease; while for hemorrhagic vascular disease, interventional covered stents can be placed at the target location in the blood vessel to achieve the treatment of hemorrhagic vascular disease. However, in the actual clinical operation process, if the ischemic disease develops into a hemorrhagic disease or other sudden conditions during the treatment process, it is necessary to replace the ordinary interventional stent with an interventional covered stent. However, in actual clinical treatment, there may be a problem of insufficient preparation of the interventional covered stent, which affects the normal progress of the operation. Summary of the invention

[0004] The embodiments of the present application provide an interventional stent conversion component, an interventional hemostatic stent and an assembly method, which can quickly transform an ordinary interventional stent into an interventional hemostatic stent, complete rapid response treatment of sudden ischemic diseases, and provide doctors with more solutions to deal with emergencies in clinical surgical treatments.

[0005] In the first aspect, an embodiment of the present application provides an interventional stent conversion assembly, which is used to be assembled on an interventional stent to form an interventional hemostatic stent, and the interventional stent conversion assembly includes an inner lining member and an elastic member sleeved on the inner lining member; the inner lining member includes a main body portion and a pulling portion for supporting the elastic member, and the main body portion is a cylindrical structure formed by spirally winding a strip member; along the axial direction of the main body portion, the main body portion has a first end and a second end opposite to each other, and the main body portion has a cavity extending along the axial direction; the pulling portion is a longitudinal member including two ends, one end of the pulling portion is connected to the strip member forming the first end of the main body portion, and the other end passes through the cavity of the main body portion and extends out of the second end of the main body portion; the elastic member is a sleeve-shaped structure and can be elastically deformed in the radial direction. When the elastic member is sleeved on the main body portion, the elastic member is stretched out in the radial direction and adheres to the main body portion.

[0006] In this scheme, the interventional stent conversion assembly includes a lining member and an elastic member, the elastic member is a sleeve-shaped structure, the elastic member is sleeved on the main body of the lining member, the lining member provides support for the elastic member, so that the elastic member is stretched in the radial direction, which is convenient for the subsequent assembly of the elastic member on the interventional stent, and the elastic member can be attached to the interventional stent under its own reset action, and form an interventional hemostatic stent. By adopting a cylindrical structure formed by winding a strip-shaped member as the main body of the lining member, the pulling part is connected to the strip-shaped member at the first end of the main body, and the other end of the pulling part passes through the cavity of the main body and extends out of the second end of the main body, the pulling part can be pulled to allow the lining member and the elastic member to be cleverly separated, which is also convenient for the operation of medical staff, so that the elastic member can be conveniently and quickly sleeved on the interventional stent to form an interventional hemostatic stent, the loading process is convenient and fast, and the operation difficulty of medical staff is low. Especially in the case where there may be insufficient preparation of the interventional covered stent in actual clinical treatment, the rapid response treatment of sudden ischemic diseases can be completed, and more solutions can be provided to doctors to cope with emergencies in clinical surgical treatment.

[0007] In some embodiments, the pulling portion is integrally formed with the strip forming the main body portion.

[0008] In the above technical solution, the pulling part and the strip-shaped part forming the main body are integrally formed. The structural stability of the integrally formed lining part is higher, and the overall processing and manufacturing of the lining part can be realized, avoiding the detailed processing and splicing of the pulling part and the main body, saving production time and manufacturing costs.

[0009] In some embodiments, the axial length of the main body is greater than the axial length of the elastic member.

[0010] In the above technical solution, the axial length of the main body is greater than the axial length of the elastic member. On the one hand, it can ensure that the elastic member has the radial support force of the main body in the axial direction, reducing the risk of the elastic member shrinking due to the lack of support from the main body, which in turn leads to difficulties in assembling the interventional stent conversion assembly and the interventional stent. On the other hand, during the assembly of the interventional hemostatic stent, medical staff can act on the main body without contacting the elastic member, reducing the probability of contamination of the elastic member.

[0011] In some embodiments, the outer surface of the elastic member is provided with a hydrophilic coating; and / or the outer surface of the elastic member is provided with a drug coating.

[0012] In the above technical solution, by providing a hydrophilic coating on the outer surface of the elastic member, the hydrophilic coating can make the elastic member have a hydrophilic effect, and after the elastic member contacts the blood vessel wall, the friction between the elastic member and the blood vessel wall can be reduced, and the elastic member is not easy to cause damage to the blood vessel, and the probability of thrombosis can be effectively reduced. And / or, according to actual needs, a drug coating can be provided on the outer surface of the elastic member, and the drug coating can be loaded with drugs, which can have a drug treatment effect on the target position of the blood vessel.

[0013] In some embodiments, the elastic member is a polyurethane tube.

[0014] In the above technical solution, the elastic member is a polyurethane tube, which has sealing properties and high elasticity. After the elastic member is loaded on the interventional stent, the hemostatic function of the interventional hemostatic stent can be achieved. In addition, due to its own high elasticity, the polyurethane tube can expand and expand with the interventional stent, meeting the expansion and deformation requirements of the interventional stent.

[0015] In some embodiments, the cross-sectional shape of the main body is polygonal, elliptical or circular.

[0016] In the above technical solution, the cross-sectional shape of the main body is polygonal, elliptical or circular. The shape of the main body has a wider range of choices and is more flexible to select. The cross-sectional shape of the main body can be selected according to actual conditions.

[0017] In some embodiments, along the axial direction of the main body, the main body includes a plurality of spiral circles, and two adjacent spiral circles are easily torn apart.

[0018] In the above technical solution, two adjacent spiral circles are easily torn apart. On the one hand, when the main body is not separated from the elastic member, the axial rigidity of the main body is relatively higher, and the amplitude of the left and right swing of the main body in a natural state is small, thereby providing better radial support force for the elastic member, and facilitating the assembly of the interventional stent conversion assembly onto the interventional stent. When the lining member needs to be removed, the two adjacent spiral circles are easily torn apart. The medical staff can separate the two adjacent spiral circles with a little force, which is convenient for the detachment of the lining member from the elastic member, and the operation of the medical staff is more labor-saving.

[0019] In the second aspect, an embodiment of the present application provides an assembling method of an interventional hemostatic stent, and the assembling method includes the following steps: providing an interventional stent and an interventional stent conversion assembly of any of the aforementioned embodiments; sleeve the interventional stent conversion assembly on an interventional stent; pulling the pulling part to pull the strip-shaped piece forming the main body from the first end toward the second end, and the strip-shaped piece gradually passes through the cavity and comes out from the second end of the main body until the main body becomes a strip-shaped piece; thereby, the elastic piece loses the radial supporting force of the lining piece and is attached to the interventional stent to form an interventional hemostatic stent.

[0020] In the above technical solution, the medical staff pulls the pulling part to pull the strip forming the main body from the first end to the second end, and the strip gradually passes through the cavity and comes out from the second end of the main body, so that the lining part and the elastic part can be gradually separated. After the elastic part loses the radial support force of the lining part, it automatically adheres to the interventional stent, so that the ordinary interventional stent becomes equipped with the functions of the coated stent. The loading process of the interventional hemostatic stent is simple and convenient, which greatly reduces the difficulty of operation for medical staff. Medical staff can quickly convert the ordinary interventional stent into an interventional hemostatic stent, complete the rapid response treatment of sudden ischemic diseases, respond to emergencies in clinical surgical treatment, and provide doctors with more solutions.

[0021] In some embodiments, before the pulling portion is pulled, the second end of the main body portion and the interventional stent are kept relatively fixed.

[0022] In the above technical solution, the second end of the main body is kept relatively fixed to the interventional stent, so that during the pulling process, the main body will not move relative to the interventional stent in the axial direction, which facilitates the separation of the main body and the elastic member.

[0023] In a third aspect, an embodiment of the present application provides an interventional hemostatic stent, which includes an interventional stent and an interventional stent conversion assembly of any of the aforementioned embodiments, wherein the interventional stent conversion assembly is sleeved on the interventional stent.

[0024] In the above technical solution, the interventional stent conversion assembly is sleeved on the interventional stent, the lining part and the elastic part in the interventional stent conversion assembly are separated, and the elastic part is sleeved on the interventional stent to form an interventional hemostatic stent.

[0025] In a fourth aspect, an embodiment of the present application provides an interventional hemostatic stent, which includes an interventional stent and an elastic member in the interventional stent conversion assembly of any of the aforementioned embodiments, wherein the elastic member is attached to the interventional stent.

[0026] In the above technical solution, the elastic member is attached to the interventional stent to form an interventional hemostatic stent. The elastic member is a sleeve-shaped structure. The elastic member acts as the membrane structure of the interventional hemostatic stent, making the structure of the interventional hemostatic stent simple. The elastic member can follow the expansion of the interventional stent to achieve blood flow in the interventional hemostatic stent, and will not impact the blood vessel wall in the process, which greatly avoids the situation of rupture of the blood vessel wall leading to heavy bleeding, and can meet the hemostatic function requirements of the interventional hemostatic stent. In addition, the elastic member of the interventional hemostatic stent can be easily disassembled to achieve two-way switching between the interventional hemostatic stent and the interventional stent, which provides more choices for medical staff and more solutions for doctors.

[0027] In some embodiments, when the elastic member is in a natural state, the inner diameter of the elastic member is 0.1 mm-1 mm smaller than the outer diameter of the interventional stent.

[0028] In the above technical solution, the inner diameter of the elastic part is 0.1mm-1mm smaller than the outer diameter of the interventional stent, so that the elastic part can be wrapped tightly around the outer peripheral surface of the interventional stent. During the delivery of the interventional hemostatic stent by the delivery system, the elastic part is not easy to separate from the interventional stent, and the interventional hemostatic stent has higher stability.

[0029] In some embodiments, two axial ends of the interventional stent extend beyond two axial ends of the elastic member respectively.

[0030] In the above technical solution, the interventional stent can provide effective support to the elastic member in the axial direction, thereby preventing the normal use of the interventional hemostatic stent from being affected due to the hanging and shrinking of one end of the elastic member.

[0031] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of an interventional stent conversion assembly provided in some embodiments of the present application;

[0034] Figure 2 A front view of an interventional stent conversion assembly provided for some embodiments of the present application;

[0035] Figure 3 A schematic diagram of the structure of the lining member in the interventional stent conversion assembly provided in some embodiments of the present application;

[0036] Figure 4 for Figure 3 A front view of the middle lining member;

[0037] Figure 5 for Figure 3 a side view of the middle lining member;

[0038] Figure 6 A schematic diagram of the structure of an interventional hemostatic stent provided in some embodiments of the present application.

[0039] Icons: 100-interventional stent conversion assembly; 10-lining member; 11-main body; 111-first end; 112-second end; 113-cavity; 114-coil; 115-breakpoint; 12-traction part; 20-elastic member; 200-interventional hemostatic stent; 201-interventional stent. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0044] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] According to the type of indication, interventional devices can be divided into ischemic vascular disease devices and hemorrhagic vascular disease devices. For ischemic vascular disease, ordinary interventional stents can be placed in the infarction site in the blood vessel to expand the narrowed part of the blood vessel to achieve the treatment of ischemic vascular disease. For hemorrhagic vascular disease, interventional covered stents can be placed in the target position in the blood vessel. The membrane on the interventional covered stent can seal the ruptured part of the blood vessel wall, thereby achieving the treatment of ischemic vascular disease. Ordinary interventional stents and interventional covered stents are two different types of stents, and the two interventional stents cannot be switched between each other. However, there may be some emergencies in actual clinical treatment, such as ischemic diseases evolving into hemorrhagic diseases or other emergencies during treatment, and interventional covered stents may be insufficiently prepared, affecting the normal progress of the operation.

[0046] In view of this, the present application embodiment provides an interventional stent conversion assembly, please refer to Figures 1 to 6 The interventional stent conversion assembly 100 is used to be assembled on the interventional stent 201 to form the interventional hemostatic stent 200. The interventional stent conversion assembly 100 includes an inner lining member 10 and an elastic member 20 sleeved on the inner lining member 10; the inner lining member 10 includes a main body 11 and a pulling part 12 for supporting the elastic member 20, and the main body 11 is a cylindrical structure formed by spirally winding a strip; along the axial direction of the main body 11, the main body 11 has a first end 111 and a second end 112 opposite to each other. 12, the main body 11 has a cavity 113 extending in the axial direction; the pulling part 12 is a longitudinal piece including two ends, one end of the pulling part 12 is connected to the strip-shaped piece forming the first end 111 of the main body 11, and the other end passes through the cavity 113 of the main body 11 and extends out of the second end 112 of the main body 11; the elastic member 20 is a sleeve-shaped structure and can be elastically deformed in the radial direction. When the elastic member 20 is sleeved on the main body 11, the elastic member 20 is stretched in the radial direction and adheres to the main body 11.

[0047] In the present embodiment, the interventional stent conversion assembly 100 includes an inner lining member 10 and an elastic member 20. The elastic member 20 is a sleeve-shaped structure. The elastic member 20 is sleeved on the main body 11 of the inner lining member 10. The inner lining member 10 provides support for the elastic member 20, allowing the elastic member 20 to be stretched radially to facilitate the subsequent assembly of the elastic member 20 on the interventional stent 201. The elastic member 20 can be attached to the interventional stent 201 under its own resetting action to form an interventional hemostatic stent 200. By adopting a cylindrical structure formed by winding a strip-shaped piece as the main body 11 of the lining member 10, the pulling portion 12 is connected to the strip-shaped piece at the first end 111 of the main body 11, and the other end of the pulling portion 12 passes through the cavity 113 of the main body 11 and extends out of the second end 112 of the main body 11. By pulling the pulling portion 12, the lining member 10 and the elastic member 20 can be cleverly separated, which is also convenient for medical staff to operate, so that the elastic member 20 can be easily and quickly mounted on the interventional stent 201 to form an interventional hemostatic stent 200. The loading process is convenient and quick, and the operation difficulty of medical staff is low.

[0048] In clinical surgery, the interventional stent conversion assembly 100 can be used as a consumable. After the medical staff puts the interventional stent conversion assembly 100 on the interventional stent 201, the medical staff only needs to pull the pulling part 12 to gradually separate the lining part 10 and the elastic part 20. After the elastic part 20 loses the radial supporting force of the lining part 10, it automatically adheres to the interventional stent 201. Because the elastic part 20 is a sleeve structure, after the elastic part 20 is adhered to the interventional stent 201, the interventional stent 201 after loading is completed has a membrane structure, and the elastic part 20 can follow the expansion of the interventional stent 201 to meet the hemostatic function requirements of the interventional hemostatic stent 200. This solution cleverly splits the functions of the traditional interventional covered stent. With the provision of the interventional stent conversion assembly 100, medical staff can make it possible for an ordinary interventional stent 201 to be converted into an interventional hemostatic stent 200 in actual clinical practice. This is especially true when there may be insufficient preparation of interventional covered stents in actual clinical treatment. This can provide rapid response treatment for sudden ischemic diseases, cope with emergencies in clinical surgical treatments, and provide doctors with more solutions.

[0049] Among them, the material of the lining member 10 can be PDFE or nylon, PDFE, that is, polytetrafluoroethylene material, and the lining member 10 can be deformed in the radial direction. The main body 11 and the pulling part 12 of the lining member 10 can be integrally formed, or can be connected by subsequent processing. The material of the elastic member 20 can be a polymer material, such as polyurethane. The elastic member 20 has a high deformation ability in the radial direction and can meet the expansion requirements of the interventional stent 201. The interventional stent conversion assembly 100 has a wide range of applications, and can be applied to the cardiovascular field, the neurovascular field, the peripheral vascular field, the reproductive system field, or the tracheal system field, etc.

[0050] It should be noted that when the medical staff assembles the interventional hemostatic stent 200, the inner diameter of the lining member 10 is larger than the outer diameter of the interventional stent 201, and the medical staff can directly sleeve the interventional stent conversion assembly 100 on the interventional stent 201. After the interventional stent conversion assembly 100 is sleeved on the interventional stent 201, the medical staff holds the position of the interventional stent 201 close to the second end 112 with one hand, so that the interventional stent conversion assembly 100 and the interventional stent 201 remain relatively fixed in the axial direction, and then pulls the pulling part 12 with the other hand to pull the strip-shaped member forming the main body 11 from the first end 111 to the second end 112, and the strip-shaped member gradually passes through the cavity 113 and passes out from the second end 112 of the main body 11 until the main body 11 becomes a strip-shaped member, and after the elastic member 20 loses the radial supporting force of the lining member 10, the elastic member 20 is attached to the interventional stent 201 to form the interventional hemostatic stent 200.

[0051] Since the size of the elastic member 20 is very small, with an outer diameter of the millimeter level, it is difficult for medical staff to directly load the elastic member 20 onto the interventional stent 201 in actual clinical practice. In the actual manufacturing process of the interventional stent conversion assembly 100, the elastic member 20 can be expanded by using a tool (such as a mold) and then loaded onto the lining member 10 to achieve the assembly of the interventional stent conversion assembly 100. In clinical surgery, through the ingenious setting of the lining member 10, medical staff can quickly load the elastic member 20 onto the interventional stent 201, and then coat the interventional stent 201 to obtain the interventional hemostatic stent 200.

[0052] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 5 The pulling portion 12 is integrally formed with the strip forming the main body 11. The pulling portion 12 is integrally formed with the strip forming the main body 11, and the integrally formed lining member 10 has higher structural stability, and the lining member 10 can be processed and manufactured as a whole, avoiding detailed processing and splicing of the pulling portion 12 and the main body 11, saving production time and manufacturing costs.

[0053] In some embodiments, please refer to Figure 1 and Figure 2, the axial length of the main body 11 is greater than the axial length of the elastic member 20. By making the axial length of the main body 11 greater than the axial length of the elastic member 20, on the one hand, it can be ensured that the elastic member 20 has the radial support force of the main body 11 in the axial direction, reducing the risk of the elastic member 20 partially shrinking due to the lack of support from the main body 11, thereby causing difficulty in assembling the interventional stent conversion assembly with the interventional stent 201. On the other hand, during the assembly process of the interventional hemostatic stent 200, medical staff can act on the main body 11 without contacting the elastic member 20, reducing the probability of the elastic member 20 being contaminated.

[0054] Among them, the axial length of the main body 11 is greater than the axial length of the elastic member 20. Both ends of the main body 11 in the axial direction may be arranged beyond the two ends of the elastic member 20, or one end of the main body 11 in the axial direction may be arranged beyond one end of the elastic member 20, and the other end may be flush with the end of the elastic member 20.

[0055] In this embodiment, please refer to Figure 1 and Figure 2 Both ends of the main body 11 in the axial direction are arranged beyond the two ends of the elastic member 20 .

[0056] In some embodiments, the outer surface of the elastic member 20 is provided with a hydrophilic coating; and / or, the outer surface of the elastic member 20 is provided with a drug coating. By providing a hydrophilic coating on the outer surface of the elastic member 20, the hydrophilic coating can make the elastic member 20 have a hydrophilic effect, and after the elastic member 20 contacts the blood vessel wall, the friction between the elastic member 20 and the blood vessel wall can be reduced, and the elastic member 20 is not easy to cause damage to the blood vessel, and can effectively reduce the probability of thrombosis. And / or, according to actual needs, a drug coating can be provided on the outer surface of the elastic member 20, and the drug coating can be loaded with drugs, which can have a drug treatment effect on the target position of the blood vessel.

[0057] In some embodiments, the elastic member 20 is a polyurethane tube. By using the elastic member 20 as a polyurethane tube, the polyurethane tube has sealing properties and high elasticity. After the elastic member 20 is loaded on the interventional stent 201, the hemostasis function of the interventional hemostatic stent 200 can be achieved. In addition, due to its own high elasticity, the polyurethane tube can expand and expand with the interventional stent 201, meeting the expansion and deformation requirements of the interventional stent 201.

[0058] The wall thickness of the polyurethane tube is 0.001 mm to 0.200 mm, and the polyurethane tube can expand 5 to 10 times its own diameter, which can fully meet the needs of the interventional stent 201. The size of the polyurethane tube after restoration will be slightly smaller than the size of the interventional stent 201 when it is not opened for use. For example, the inner diameter of the polyurethane tube is 0.1 mm to 1 mm smaller than the outer diameter of the interventional stent 201 in the contracted state.

[0059] In some embodiments, the cross-sectional shape of the main body 11 is polygonal, elliptical or circular. The cross-sectional shape of the main body 11 is polygonal, elliptical or circular, and the shape of the main body 11 has a wider range of choices and is more flexible. The cross-sectional shape of the main body 11 can be selected according to actual conditions.

[0060] For example, please refer to Figure 5 The cross-section of the main body 11 is circular. The main body 11 with a circular cross-section can provide 360° annular support for the elastic member 20 in the circumferential direction, with a larger support area and a better support effect for the elastic member 20. In addition, the outer surfaces of the main body 11 with a circular cross-section are all arc-shaped surfaces, which are not easy to scratch the elastic member 20.

[0061] In some embodiments, please combine Figure 4 and Figure 5 , along the axial direction of the main body 11, the main body 11 includes a plurality of spiral circles 114, and there is an easy-tear connection between two adjacent spiral circles 114. The easy-tear connection between two adjacent spiral circles 114, on the one hand, when the main body 11 is not separated from the elastic member 20, makes the axial rigidity of the main body 11 relatively higher, and the amplitude of the left and right swing of the main body 11 in a natural state is small, thereby providing a better radial support force for the elastic member 20, and also facilitating the assembly of the interventional stent conversion assembly onto the interventional stent 201. When the lining member 10 needs to be removed, there is an easy-tear connection between two adjacent spiral circles 114, and the medical staff can separate the two adjacent spiral circles 114 with a little force, which is convenient for the liner 10 to be separated from the elastic member 20, and the operation of the medical staff is more labor-saving.

[0062] Among them, along the circumference of the spiral circle 114, there are multiple breakpoints 115 connecting two adjacent spiral circles 114. After the spiral circle 114 is subjected to tension, the breakpoints 115 will lose their connection. The connection method of the breakpoints 115 is similar to the principle of the tear line on the tissue packaging bag in the prior art, and the tear line will not be described in detail here.

[0063] An embodiment of the present application provides an assembling method for an interventional hemostatic stent, and the assembling method includes the following steps: providing an interventional stent 201 and an interventional stent conversion assembly 100 of any of the aforementioned embodiments; sleeve the interventional stent conversion assembly 100 on the interventional stent 201; pulling the pulling portion 12 to pull the strip-shaped member forming the main body 11 from the first end 111 to the second end 112, and the strip-shaped member gradually passes through the cavity 113 and comes out from the second end 112 of the main body 11 until the main body 11 becomes a strip-shaped member; thereby, the elastic member 20 loses the radial supporting force of the lining member 10 and is attached to the interventional stent 201 to form the interventional hemostatic stent 200.

[0064] The medical staff pulls the pulling part 12 to pull the strip forming the main body 11 from the first end 111 to the second end 112. The strip gradually passes through the cavity 113 and comes out from the second end 112 of the main body 11, so that the lining 10 and the elastic member 20 can be gradually separated. After the elastic member 20 loses the radial support force of the lining 10, it automatically adheres to the interventional stent 201, so that the ordinary interventional stent 201 becomes an interventional covered stent. The loading process of the interventional hemostatic stent 200 is simple and convenient, which greatly reduces the difficulty of operation for medical staff. Medical staff can quickly convert the ordinary interventional stent 201 into an interventional hemostatic stent 200, complete the rapid response treatment of sudden ischemic diseases, respond to emergencies in clinical surgical treatment, and provide doctors with more solutions.

[0065] In some embodiments, before pulling the pulling portion 12, the second end 112 of the main body 11 is relatively fixed to the interventional stent 201. The second end 112 of the main body 11 is relatively fixed to the interventional stent 201, so that during the pulling portion 12, the main body 11 will not move relative to the interventional stent 201 in the axial direction, which facilitates the separation of the main body 11 and the elastic member 20.

[0066] Among them, the second end 112 of the main body 11 is kept relatively fixed with the interventional stent 201. In fact, the medical staff can hold the position of the interventional stent 201 close to the second end 112 with one hand to keep the interventional stent conversion assembly and the interventional stent 201 relatively fixed in the axial direction, and then pull the pulling part 12 with the other hand. One medical staff can complete the assembly of the interventional hemostatic stent 200.

[0067] The embodiment of the present application provides an interventional hemostatic stent 200, which includes an interventional stent 201 and an interventional stent conversion assembly 100 of any of the above embodiments, and the interventional stent conversion assembly 100 is sleeved on the interventional stent 201. The interventional hemostatic stent 200 can be formed by separating the lining member 10 and the elastic member 20 in the interventional stent conversion assembly 100 and sleeved the elastic member 20 on the interventional stent 201.

[0068] The present application embodiment provides an interventional hemostatic stent, please refer to Figure 6The interventional hemostatic stent 200 includes an interventional stent 201 and an elastic member 20 in the interventional stent conversion assembly 100 of any of the aforementioned embodiments, and the elastic member 20 is attached to the interventional stent 201. The elastic member 20 is attached to the interventional stent 201 to form the interventional hemostatic stent 200. The elastic member 20 is a sleeve-shaped structure, and the elastic member 20 acts as a membrane structure of the interventional hemostatic stent 200, so that the structure of the interventional hemostatic stent 200 is simple, and the elastic member 20 can follow the expansion and expansion of the interventional stent 201, so that blood can flow in the interventional hemostatic stent 200, and will not impact the blood vessel wall in the process, which greatly avoids the situation of rupture of the blood vessel wall leading to heavy bleeding, and can meet the hemostatic function requirements of the interventional hemostatic stent 200. In addition, the elastic member 20 of the interventional hemostatic stent 200 can be easily disassembled to achieve the two-way switching between the interventional hemostatic stent 200 and the interventional stent 201, which provides more choices for medical staff and more solutions for doctors.

[0069] The interventional stent 201 can be an ordinary interventional stent 201. For example, the interventional stent 201 can be a memory metal, such as a nickel-titanium alloy interventional stent with a self-expansion function. The interventional stent 201 can also be a balloon-expandable stainless steel stent. When the interventional stent 201 is a nickel-titanium alloy interventional stent with a self-expansion function, the elastic member 20 is prepared in advance at the head end of the delivery system of the nickel-titanium stent, and then the nickel-titanium stent is released to a suitable size for recovery. The release process of the interventional stent 201 loads and installs the elastic member 20 on the interventional stent 201. After loading is completed, the interventional stent 201 is recovered and entered into the delivery system. The interventional stent 201 becomes a membrane structure function, and the interventional surgery can be performed according to the normal operation process to achieve the above-mentioned related effects.

[0070] In some embodiments, when the elastic member 20 is in a natural state, the inner diameter of the elastic member 20 is 0.1 mm-1 mm smaller than the outer diameter of the interventional stent 201. The inner diameter of the elastic member 20 is 0.1 mm-1 mm smaller than the outer diameter of the interventional stent 201, so that the elastic member 20 can be wrapped tightly on the outer peripheral surface of the interventional stent 201. During the transportation process of the interventional hemostatic stent 200 by the transportation system, the elastic member 20 is not easy to separate from the interventional stent 201, and the stability of the interventional hemostatic stent 200 is higher.

[0071] In some embodiments, please refer to Figure 6 The two axial ends of the interventional stent 201 are respectively beyond the two axial ends of the elastic member 20. The interventional stent 201 can provide effective support to the elastic member 20 in the axial direction, so as to avoid the normal use of the interventional hemostatic stent 200 being affected by the hanging and shrinking of one end of the elastic member 20.

[0072] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0073] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An interventional stent conversion assembly, used to be assembled on an interventional stent to form an interventional hemostatic stent, characterized in that: It comprises an inner lining member and an elastic member sleeved on the inner lining member; The lining member includes a main body portion and a pulling portion for supporting the elastic member, wherein the main body portion is a cylindrical structure formed by spirally winding a strip-shaped member; Along the axial direction of the main body, the main body has a first end and a second end opposite to each other, and the main body has a cavity extending along the axial direction; the pulling part is a longitudinal member including two ends, one end of the pulling part is connected to the strip-shaped member forming the first end of the main body, and the other end passes through the cavity of the main body and extends out of the second end of the main body; The elastic member is a sleeve-shaped structure and can be elastically deformed in the radial direction. When the elastic member is sleeved on the main body, the elastic member is stretched in the radial direction and adheres to the main body.

2. The interventional stent conversion assembly according to claim 1, characterized in that: The pulling portion is integrally formed with the strip-shaped piece forming the main body portion.

3. The interventional stent conversion assembly according to claim 1, characterized in that: The axial length of the main body is greater than the axial length of the elastic member.

4. The interventional stent conversion assembly according to claim 1, characterized in that: The outer surface of the elastic member is provided with a hydrophilic coating; and / or the outer surface of the elastic member is provided with a drug coating.

5. The interventional stent conversion assembly according to claim 1, characterized in that: The elastic member is a polyurethane tube.

6. The interventional stent conversion assembly according to claim 1, characterized in that: The cross-sectional shape of the main body is polygonal, elliptical or circular.

7. The interventional stent conversion assembly according to any one of claims 1 to 6, characterized in that: Along the axial direction of the main body, the main body includes a plurality of spiral circles, and two adjacent spiral circles are easily torn apart.

8. A method for assembling an interventional hemostatic stent, characterized in that: The following steps are involved: Providing an interventional stent and an interventional stent conversion assembly according to any one of claims 1 to 7; Sleeving the interventional stent conversion assembly onto an interventional stent; Pull the pulling part to pull the strip-shaped piece forming the main body from the first end to the second end, so that the strip-shaped piece gradually passes through the cavity and comes out from the second end of the main body until the main body becomes a strip-shaped piece; Therefore, after the elastic member loses the radial supporting force of the lining member, it adheres to the interventional stent to form an interventional hemostatic stent.

9. The method for assembling an interventional hemostatic stent according to claim 8, characterized in that: Before pulling the pulling portion, the second end of the main body is kept relatively fixed to the interventional stent.

10. An interventional hemostatic stent, characterized in that: It comprises an interventional stent and an interventional stent conversion assembly according to any one of claims 1 to 7, wherein the interventional stent conversion assembly is sleeved on the interventional stent.

11. An interventional hemostatic stent, characterized in that: It comprises an interventional stent and the elastic member in the interventional stent conversion assembly according to any one of claims 1 to 7, wherein the elastic member is attached to the interventional stent.

12. The interventional hemostatic stent according to claim 11, characterized in that: When the elastic member is in a natural state, the inner diameter of the elastic member is 0.1 mm-1 mm smaller than the outer diameter of the interventional stent.

13. The interventional hemostatic stent according to claim 11, characterized in that: Two axial ends of the interventional stent respectively extend beyond two axial ends of the elastic member.

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