CN113208790B

CN113208790B - Recyclable blood vessel support based on paper folding mechanism

Info

Publication number: CN113208790B
Application number: CN202110372636.9A
Authority: CN
Inventors: 梁东雪; 李俊杰; 殷小雷; 王路; 邱婧; 马兆远
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2022-07-12
Anticipated expiration: 2041-04-07
Also published as: CN113208790A

Abstract

The invention provides a recyclable blood vessel stent based on a paper folding mechanism, which comprises: a bracket assembly; a plurality of the bracket components are sequentially connected to form an annular bracket for supporting a blood vessel; the annular stent comprises a first expanded state and a second contracted state; wherein adjacent two of the stent assemblies are folded about their mutual connection to effect contraction of the circumferential stent in the second state. According to the recyclable blood vessel support based on the paper folding mechanism, the support structure based on the paper folding mechanism is designed, the volume conversion of a large proportion can be achieved, meanwhile, the support is small, exquisite, light and free of scattered parts, the integrated structure enables the mechanical deformation reliability to be high, the support based on the paper folding mechanism can be machined on a plane in the preparation process, and the support is simpler and quicker than the traditional complete set of processes of three-dimensional milling, etching and heat treatment.

Description

Recyclable blood vessel support based on paper folding mechanism

Technical Field

The invention relates to the technical field of medical instruments, in particular to a recyclable vascular stent based on a paper folding mechanism.

Background

The application of the blood vessel stent in the aspect of medical treatment is very wide, for example, the stent is implanted at a specific position in a human body during pathological changes so as to achieve the purposes of supporting a blood vessel at a stenotic occlusion section, reducing the elastic retraction and the reshaping of the blood vessel and keeping the blood flow of a lumen unobstructed, and part of the stent also has the effect of preventing the restenosis of the blood vessel. At present, the general form of the intravascular stent placement operation is to use a catheter for conveying, the main process is to enable the catheter to enter a human body along a human blood vessel, send the stent to a specified position along the catheter after the catheter reaches the specified position, then stick the stent to the inner wall of the blood vessel and maintain the shape after the stent is expanded to a certain diameter through the self-expansion property or a balloon of the stent, play a role in opening and supporting a stenotic occlusion section of the blood vessel, and part of the stent can also carry specific medicines on the wall of the blood vessel to play a role in treatment. Therefore, the mechanical properties of the vascular stent, the operability of the deployment and recovery processes, the drug carrying capacity, the biocompatibility and the like all have important influences on the physiological safety and the treatment effect of patients in the medical treatment process. The reasonable use of biocompatible materials and the mechanical structure which is convenient for stretching and shrinking is beneficial to the smooth and safe realization of the implantation treatment operation.

Disclosure of Invention

The invention provides a recyclable blood vessel support based on a paper folding mechanism, which is used for solving the defects of complex preparation process and relatively long preparation time of an alloy coronary artery support based on an elastic metal bending structure in the prior art.

According to the invention, the recyclable blood vessel stent based on the paper folding mechanism comprises: a bracket assembly;

a plurality of the bracket components are sequentially connected to form an annular bracket for supporting a blood vessel;

the annular stent comprises a first expanded state and a second contracted state;

wherein adjacent two of the stent assemblies are folded about the junction with one another to effect contraction of the circumferential stent in the second state.

According to one embodiment of the invention, the bracket assembly comprises: a support sheet;

at least two bracket pieces are connected with each other to form the bracket component;

wherein the two stent pieces are folded about the junction with each other to effect contraction of the annular stent in the second state.

Particularly, this embodiment provides the embodiment that a support subassembly structure is constituteed, connects and can fold around the junction each other through at least two support pieces, has realized folding of support subassembly self, can carry or the in-process of retrieving at vascular stent, reduces the volume of ring stent and support subassembly through folding, realizes the transform of great proportion volume.

Furthermore, because the bracket component is formed by connecting at least two bracket pieces, the bracket component does not have other scattered parts, and the annular bracket also forms an integral plane supporting structure after being unfolded, thereby realizing the comprehensive support of the inner wall of the blood vessel and avoiding the problem that the blood vessel is damaged by extrusion due to the partial support brought by the supporting structures such as a net.

In one application scenario, the number of stent pieces constituting the stent assembly is three.

In one application scenario, the number of stent pieces constituting the stent assembly is two.

In one application scenario, the number of stent pieces constituting the stent assembly is four.

According to one embodiment of the invention, a plurality of the annular supports are connected in sequence along the axial direction;

wherein adjacent two of the ring supports are folded about the junction with each other to effect contraction of the ring supports in the second state.

Specifically, the present embodiment provides an embodiment of a ring stent, and a plurality of ring stents are connected to each other along the axial direction, so that the supporting area of the blood vessel is increased.

According to one embodiment of the invention, the bracket assembly is made primarily of a memory material; the first state of the ring-shaped stent is an initial state of a memory material;

alternatively, the stent assembly is made of an organic biocompatible material having elasticity.

Specifically, the present embodiment provides an embodiment of a stent component material composition, which is formed by making a stent component from a memory material, so that a ring-shaped stent formed by the stent component can be restored to an initial state of the memory material in a natural state, wherein an expanded state of the ring-shaped stent is the initial state, that is, the ring-shaped stent is in the expanded state without applying an external force.

Further, the stent assembly mainly made of the organic biocompatible material having elasticity is used, and the switching from the second state to the first state is realized by the property of the organic biocompatible material itself.

According to an embodiment of the present invention, further comprising: the sockets and the pins are arranged on the matching surfaces of at least one pair of adjacent bracket assemblies along the circumferential direction of the annular bracket in a mutually corresponding manner;

the socket includes: the two support rods are arranged on one matching surface of a pair of adjacent support assemblies at intervals; the two guide heads are respectively connected with the support rod and abutted against each other, and a channel through which the contact pin passes is formed between the two guide heads;

the contact pin comprises: the plug rod is arranged on the other matching surface of the adjacent bracket components relative to the socket, and the plug connector is arranged at the end part of one side of the plug rod, which faces the socket;

after the contact pin passes through the channel, the two guide heads are abutted with the plug connector so as to realize the connection of the two adjacent bracket assemblies.

Particularly, this embodiment provides the embodiment of the adjacent bracket component connected form, has realized the connection of two adjacent bracket components through setting up socket and contact pin for the annular bracket can adopt the mode of planar machining to process.

According to one embodiment of the present invention, an arc-shaped guiding structure for guiding the insertion of the pin is formed on a surface of the guiding head facing the insertion of the pin.

Specifically, the present embodiment provides an embodiment of a guide head, which provides an arc-shaped guide structure, so that a pin can more quickly pass through two guide heads during the process of being inserted into a socket, and a quick positioning between two adjacent bracket assemblies is formed.

According to one embodiment of the invention, at least the support member is formed by 3D printing.

Particularly, this embodiment provides an implementation mode of supporting component manufacturing process, through the mode that 3D printed, realized supporting component's processing, it should be explained that, at the in-process of printing supporting component, socket and contact pin can be to setting up on a pair of adjacent supporting component, and remaining supporting component all prints the direct realization connection through 3D, through socket and contact pin realization two adjacent supporting component's connection after printing finishes, and then realize the formation of ring carrier.

According to an embodiment of the present invention, further comprising: the device comprises a hook body, an elastic support, an operating wire, an operating pipe and a conveying pipe;

the at least two hook bodies are arranged on the inner wall of one side end part of the annular support at intervals along the circumferential direction of the annular support;

one end of the elastic support penetrates from the other end, opposite to the hook body, of the annular support and is correspondingly connected with the hook body;

the other end of the elastic support is detachably connected with the operating wire;

the operating wire is arranged in the operating pipe;

the operation pipe is arranged inside the transport pipe;

said toroidal support being inside said transport duct at least in a second condition;

wherein, the operating tube is provided with towards annular support one side with the spacing ring of annular support butt.

In particular, the present embodiment provides an embodiment for the transportation and retrieval of the ring shaped stent, which is achieved by providing a transportation tube and a handling tube, wherein the ring shaped stent is in the transportation tube at least in the second state.

Further, the one end and the coupler body of elastic support are connected, and the coupler body is connected with the inner wall of ring carrier, and elastic support passes through coupler body pulling ring carrier, is provided with the spacing ring that is used for with the ring carrier butt on the control tube this moment, and under the effect of elastic support and spacing ring, the ring carrier takes place to deform, and then switches to the second state from first state.

Further, an operating wire is arranged in the operating pipe, the operating wire is matched with the elastic support, and the operating wire is operated, such as pulling and the like, so that the elastic support is applied with force, and further the annular support is applied with force.

According to an embodiment of the present invention, further comprising: a first magnetic member and a second magnetic member;

the first magnetic part is arranged on one side of the elastic support matched with the operating wire;

the second magnetic part is arranged on one side of the operating wire matched with the elastic support;

the first magnetic part is a permanent magnet, and the second magnetic part is an electromagnet.

Specifically, the present embodiment provides an implementation manner of a connection form of an elastic support and an operation wire, the elastic support and the operation wire are connected by a first magnetic member and a second magnetic member, the first magnetic member is a permanent magnet, the second magnetic member is an electromagnet, that is, when the electromagnet is powered on, the second magnetic member has magnetism, and under the magnetic action, the first magnetic member and the second magnetic member are attracted, and the operation wire is connected with the elastic support.

According to an embodiment of the present invention, further comprising: the heating wire, the heating wire set up in inside or wrap up in the outside of operating filament, be used for through the heating the operating filament to elastic support with toroidal support transmits the heat.

Specifically, the present embodiment provides an implementation manner for realizing rapid deployment of the toroidal support by providing a heating wire, and by providing a heating wire, rapid switching of the toroidal support from the second state to the first state is realized.

One or more technical solutions in the present invention have at least one of the following technical effects: according to the recyclable blood vessel support based on the paper folding mechanism, the support structure based on the paper folding mechanism is designed, the volume conversion of a large proportion can be achieved, meanwhile, the support is small, exquisite, light and free of scattered parts, the integrated structure enables the mechanical deformation reliability to be high, the support based on the paper folding mechanism can be machined on a plane in the preparation process, and the support is simpler and quicker than the traditional complete set of processes of three-dimensional milling, etching and heat treatment.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is one of the schematic structural diagrams of a loop stent in a recyclable blood vessel stent based on a paper folding mechanism provided by the invention;

FIG. 2 is a schematic structural diagram of two adjacent stent assemblies in a recyclable vascular stent based on a paper folding mechanism according to the present invention;

FIG. 3 is one of the schematic structural diagrams of a stent sheet in the recyclable blood vessel stent based on a paper folding mechanism provided by the invention;

FIG. 4 is a second schematic structural view of a stent sheet in the recyclable blood vessel stent based on a paper folding mechanism according to the present invention;

FIG. 5 is a third schematic structural view of a stent sheet in the recyclable blood vessel stent based on a paper folding mechanism according to the present invention;

FIG. 6 is a second schematic view of a loop stent of the recyclable vascular stent based on a paper folding mechanism according to the present invention;

FIG. 7 is a third schematic view of a loop stent of the recyclable vascular stent based on a paper folding mechanism according to the present invention;

FIG. 8 is a schematic view of the fitting relationship between the socket and the insertion needle in the recyclable blood vessel support based on the paper folding mechanism according to the present invention;

FIG. 9 is a second schematic view showing the assembly relationship between the socket and the insertion needle in the recyclable blood vessel support based on the paper folding mechanism according to the present invention;

FIG. 10 is a schematic view of the hook body and the elastic support in the recyclable blood vessel support based on the paper folding mechanism according to the present invention;

FIG. 11 is one of the schematic views showing the assembling relationship among the ring-shaped stent, the elastic support, the operation wire, the operation tube and the transportation tube in the recyclable blood vessel stent based on the paper folding mechanism according to the present invention;

FIG. 12 is a second schematic view showing the assembly relationship of the loop stent, the elastic support, the operation wire, the operation tube and the transportation tube in the recyclable blood vessel stent based on the paper folding mechanism according to the present invention;

FIG. 13 is a schematic view of the assembly of the operating wire and the heating wire in the recyclable vascular stent based on a paper folding mechanism according to the present invention;

fig. 14 is a second schematic view of the assembly relationship between the operating wire and the heating wire in the recyclable blood vessel stent based on the paper folding mechanism provided by the invention.

Reference numerals:

10. a bracket assembly; 11. A support sheet; 20. An annular support;

30. a socket; 31. A support bar; 32. A guide head;

40. inserting a pin; 41. A plug-in connector; 50. A hook body;

60. elastic support; 61. A first magnetic member; 70. Operating silk;

71. a second magnetic member; 72. Heating wires; 80. Operating the tube;

81. a limiting ring; 90. And (4) a conveying pipe.

Detailed Description

In order to make the objects, 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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Fig. 1 is one of the structural schematic diagrams of a loop stent 20 in the recyclable blood vessel stent based on the paper folding mechanism provided by the invention. As can be seen from fig. 1, a plurality of stent assemblies 10 are connected in sequence to form a ring-shaped stent 20, wherein two adjacent stent assemblies 10 can be folded around the connection to expand and contract the ring-shaped stent 20.

Further, a hook body 50 is provided on the inner wall of the ring-shaped support 20, the hook body 50 is used for connecting with the elastic support 60, and the acting force of the elastic support 60 on the ring-shaped support 20 is transmitted through the hook body 50.

It should be noted that only the schematic position of the hook 50 is provided in fig. 1, in practical applications, the hook 50 may be disposed at the end of the inner wall of the ring-shaped bracket 20, and may be disposed at intervals, and the disposed position may be the connection position of two adjacent bracket assemblies 10, or may be on a single bracket assembly 10.

Fig. 2 is a schematic structural diagram of two adjacent stent assemblies 10 in the recyclable blood vessel stent based on the paper folding mechanism provided by the invention. Fig. 2 shows a schematic structural view of two adjacent stent assemblies 10, and it can be seen from fig. 2 that the two adjacent stent assemblies 10 are connected to each other and can be bent around the connection to adjust the expanded and contracted states of the ring-shaped stent 20.

Fig. 3 to 5 are one, two and three schematic structural diagrams of a stent sheet 11 in the recyclable blood vessel stent based on a paper folding mechanism provided by the invention. Fig. 3 to 5 show an embodiment in which different support sheets 11 are combined to form the support assembly 10, the support sheet 11 may be any one of two, three and four, fig. 3 to 5 only show a part of the embodiment of the support sheet 11, and in practical applications, a plurality of support sheets 11 may be used to form the support assembly 10, and is not limited to the three embodiments provided in the present invention.

Fig. 6 and 7 are two and three schematic structural views of a loop stent 20 in the recyclable vascular stent based on a paper folding mechanism provided by the present invention. Fig. 6 and 7 illustrate two states of the ring support 20, the ring support 20 in fig. 6 being in a first, deployed state, and the ring support 20 in fig. 7 being in a second, switched state from the first state.

Further, as can be seen from fig. 6 and 7, the three ring-shaped stents 20 are sequentially connected to form the blood vessel stent, and according to actual requirements, more or fewer connection forms can be set, and the connection forms can be connected through a connection structure, or can be formed in one step through 3D printing, so that the blood vessel stent of a plurality of ring-shaped stents 20 meeting the actual requirements can be directly processed.

Fig. 8 and 9 are one or two schematic diagrams showing the assembling relationship between the socket 30 and the insertion needle 40 in the recyclable blood vessel support based on the paper folding mechanism provided by the invention. Fig. 8 and 9 show an embodiment in which two adjacent bracket assemblies 10 are connected by sockets 30 and pins 40, in practical application, the sockets 30 and the pins 40 correspondingly form a group of connecting assemblies, and several groups of connecting assemblies are spaced apart on the mating surface of at least one pair of adjacent bracket assemblies 10, because when a ring-shaped bracket 20 with a larger supporting diameter and supporting area is required, a variety of structural changes of the supporting diameter and supporting area can be realized by the sockets 30 and the pins 40.

Further, the sockets 30 and the pins 40 may also be printed on the side of the rack assembly 10 by a 3D printing rack.

Fig. 10 is a schematic view of the assembly relationship between the hook body 50 and the elastic support 60 in the recyclable blood vessel stent based on the paper folding mechanism provided by the invention. Showing the mating relationship of the resilient support 60 and the hook body 50.

Fig. 11 and 12 are one or two schematic diagrams illustrating the assembly relationship of the ring-shaped stent 20, the elastic support 60, the operation wire 70, the operation tube 80 and the transport tube 90 in the recyclable vascular stent based on the paper folding mechanism provided by the present invention. Fig. 11 and 12 show a schematic view of the adjustment of the ring support 20 by means of the elastic supports 60, the operating wire 70, the operating tube 80 and the transport tube 90, in fig. 11 the ring support 20 is in a first state, and in fig. 12 the ring support 20 is in or is about to reach a second state.

Fig. 13 and 14 are one or two schematic diagrams illustrating the assembly relationship of the operation wire 70 and the heating wire 72 in the recyclable vascular stent based on the paper folding mechanism provided by the invention. Fig. 13 and 14 are two schematic views of the arrangement of the heating wire 72 on the operating wire 70, and by arranging the heating wire 72, the heat of the heating wire 72 is transferred to the loop bracket 20 through the operating wire 70, the elastic support 60 and the hook 50, and the loop bracket 20 is rapidly switched from the second state to the first state, and the rapid deployment is realized.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In some embodiments of the present invention, as shown in fig. 1-14, the present solution provides a recyclable vascular stent based on a paper folding mechanism, comprising: a bracket assembly 10; a plurality of bracket assemblies 10 are connected in sequence to form a ring-shaped bracket 20 for supporting a blood vessel; the ring stent 20 comprises a first expanded state and a second contracted state; wherein adjacent two stent assemblies 10 are folded about their mutual connection to effect the collapse of the toroidal stent 20 in the second state.

In detail, the invention provides a recyclable blood vessel stent based on a paper folding mechanism, which is used for solving the defects that the preparation process of an alloy coronary stent based on an elastic metal bending structure in the prior art is complex and the preparation time is relatively long.

In some possible embodiments of the present invention, the rack assembly 10 includes: a support piece 11; at least two bracket pieces 11 are connected with each other to form a bracket assembly 10; wherein the two stent pieces 11 are folded around the junction with each other to achieve the contraction of the ring stent 20 in the second state.

Specifically, the present embodiment provides an embodiment of the structural composition of the stent assembly 10, and the at least two stent sheets 11 are connected to each other and can be folded around the connection, so that the stent assembly 10 can be folded, and the volume of the ring-shaped stent 20 and the stent assembly 10 can be reduced by folding during the transportation or recovery process of the blood vessel stent, thereby realizing the transformation of the volume of a larger proportion.

Further, because the bracket component 10 is formed by connecting at least two bracket pieces 11, the bracket component 10 does not have other scattered parts, and the annular bracket 20 also forms an integral plane supporting structure after being unfolded, thereby realizing the comprehensive support of the inner wall of the blood vessel and avoiding the problem that the blood vessel is extruded and damaged due to partial support caused by supporting structures such as a net.

In one application scenario, the number of stent segments 11 comprising the stent assembly 10 is three.

In one application scenario, the number of bracket pieces 11 constituting the bracket assembly 10 is two.

In one application scenario, the number of stent segments 11 comprising the stent assembly 10 is four.

In some possible embodiments of the invention, several toroidal supports 20 are connected in series axially; wherein adjacent two ring supports 20 are folded about the junction with each other to achieve contraction of the ring supports 20 in the second state.

Specifically, the present embodiment provides an embodiment of the ring stent 20, and the ring stents 20 are connected to each other along the axial direction, so that the supporting area of the blood vessel is increased.

In some possible embodiments of the present invention, the first state of the stent assembly 10, in which the ring-shaped stent 20 is made of a memory material, is the initial state of the memory material;

alternatively, stent assembly 10 is made primarily of an organic biocompatible material having elasticity.

Specifically, the present embodiment provides an embodiment of the material composition of the stent assembly 10, and the stent assembly 10 is made of the memory material, so that the ring-shaped stent 20 formed by the stent assembly 10 can be restored to the initial state of the memory material in the natural state, wherein the expanded state of the ring-shaped stent 20 is the initial state, that is, the ring-shaped stent 20 is in the expanded state without applying an external force.

Further, with the stent assembly 10 mainly made of an organic biocompatible material having elasticity, the switching from the second state to the first state is achieved by the properties of the organic biocompatible material itself.

In some possible embodiments of the present invention, the method further includes: the socket 30 and the pin 40 are arranged on the matching surfaces of at least one pair of adjacent bracket assemblies 10 along the circumferential direction of the annular bracket 20, wherein the socket 30 and the pin 40 correspond to each other; the socket 30 includes: the support rod 31 and the guide head 32, the two support rods 31 are arranged on a matching surface of a pair of adjacent bracket assemblies 10 at intervals; the two guide heads 32 are respectively connected with the support rod 31 and are abutted against each other, and a channel for the insertion pin 40 to pass through is formed between the two guide heads 32; the pin 40 includes: a plug rod 41 and a plug 42, the plug rod 41 is disposed on the other mating surface of the pair of adjacent rack assemblies 10 relative to the socket 30, and the plug 42 is disposed on the end of the plug rod 41 facing the socket 30; after the pin 40 passes through the passage, the two guide heads 32 abut against the plug head 42 to connect the two adjacent bracket assemblies 10.

Specifically, the present embodiment provides an embodiment of the connection form of adjacent rack assemblies 10, and the connection of two adjacent rack assemblies 10 is realized by providing the socket 30 and the pin 40, so that the ring-shaped rack 20 can be processed by planar processing.

In some possible embodiments of the present invention, the side of the guide head 32 facing the insertion of the pin 40 is formed with an arc-shaped guide structure for guiding the insertion of the pin 40.

Specifically, the present embodiment provides an embodiment of the guide heads 32, which provides an arc-shaped guide structure, so that the pins 40 can more rapidly pass through two guide heads 32 during the insertion process into the socket 30, and a rapid positioning between two adjacent rack assemblies 10 is formed.

In some possible embodiments of the invention, at least the support member is formed by means of 3D printing.

Specifically, this embodiment provides an implementation mode of supporting component processing technology, through the mode of 3D printing, has realized the processing of supporting component, it needs to explain that, at the in-process of printing supporting component, socket 30 and contact pin 40 can be to setting up on a pair of adjacent supporting component, and remaining supporting component all directly realizes connecting through 3D printing, through the connection of socket 30 and contact pin 40 realization adjacent two supporting component after printing finishes, and then realizes the formation of ring carrier 20.

In some possible embodiments of the present invention, the method further includes: hook body 50, elastic support 60, operating wire 70, operating tube 80 and transport tube 90; at least two hook bodies 50 are arranged on the inner wall of one side end part of the annular bracket 20 at intervals along the circumferential direction of the annular bracket 20; one end of the elastic support 60 penetrates from the annular bracket 20 to the other end of the hook body 50 and is correspondingly connected with the hook body 50; the other end of the elastic support 60 is detachably connected with the operating wire 70; the operation wire 70 is arranged inside the operation tube 80; the operation pipe 80 is arranged inside the transport pipe 90; the toroidal support 20 is inside the transport tube 90 at least in the second state; the operation tube 80 is provided with a stopper ring 81 abutting against the annular holder 20 on the side facing the annular holder 20.

Specifically, the present embodiment provides an embodiment of the transportation and recovery of the ring support 20, which is realized by providing the transportation pipe 90 and the operation pipe 80, wherein the ring support 20 is located in the transportation pipe 90 at least in the second state.

Furthermore, one end of the elastic support 60 is connected with the hook body 50, the hook body 50 is connected with the inner wall of the annular support 20, the elastic support 60 pulls the annular support 20 through the hook body 50, at this time, the operating pipe 80 is provided with a limiting ring 81 used for being abutted against the annular support 20, and under the action of the elastic support 60 and the limiting ring 81, the annular support 20 deforms, and then is switched from the first state to the second state.

Further, the operating wire 70 is provided in the operating tube 80, the operating wire 70 is engaged with the elastic support 60, and the operating wire 70 is pulled, for example, to apply a force to the elastic support 60 and thus to apply a force to the ring holder 20.

In some possible embodiments of the present invention, the method further includes: the first magnetic member 61 and the second magnetic member 71; the first magnetic part 61 is arranged on one side of the elastic support 60 matched with the operating wire 70; the second magnetic member 71 is disposed on the side where the operating wire 70 is engaged with the elastic support 60; the first magnetic member 61 is a permanent magnet, and the second magnetic member 71 is an electromagnet.

Specifically, the embodiment provides an implementation manner of connection between the elastic support 60 and the operation wire 70, the elastic support 60 and the operation wire 70 are connected through a first magnetic member 61 and a second magnetic member 71, the first magnetic member 61 is a permanent magnet, the second magnetic member 71 is an electromagnet, that is, when the electromagnet is powered on, the second magnetic member 71 has magnetism, and under the magnetic action, the first magnetic member 61 and the second magnetic member 71 are attracted, and the operation wire 70 is connected with the elastic support 60.

In some possible embodiments of the present invention, the method further includes: and a heating wire 72, wherein the heating wire 72 is disposed inside the operating wire 70 or wrapped outside the operating wire 70, for transferring heat to the elastic support 60 and the toroidal support 20 by heating the operating wire 70.

Specifically, the present embodiment provides an embodiment in which rapid deployment of the toroidal support 20 is achieved by providing heating wire 72, and rapid switching of the toroidal support 20 from the second state to the first state is achieved by providing heating wire 72.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.

Claims

1. A retrievable vascular stent based on a paper folding mechanism, comprising: a bracket assembly;

wherein adjacent two of the stent assemblies are folded about the junction with one another to effect contraction of the circumferential stent in the second state;

further comprising: the sockets and the pins are arranged on the matching surfaces of at least one pair of adjacent bracket components in a mutually corresponding mode along the circumferential direction of the annular bracket;

the contact pin comprises: the plug rod is arranged on the other matching surface of the adjacent bracket assemblies relative to the socket, and the plug connector is arranged at the end part of one side of the plug rod, which faces the socket;

after the contact pin passes through the channel, the two guide heads are abutted to the plug connector so as to realize the connection of the two adjacent bracket assemblies.

2. The retrievable vascular stent based on a paper folding mechanism according to claim 1, wherein the stent assembly comprises: a support sheet;

at least two of the bracket pieces are connected with each other to form the bracket component;

3. The recyclable blood vessel support based on paper folding mechanism as claimed in claim 1, wherein a plurality of the ring-shaped supports are connected in sequence along the axial direction;

4. The recyclable blood vessel support based on paper folding mechanism of any of claims 1 to 3, wherein the support member is mainly made of memory material; the first state of the ring-shaped stent is an initial state of a memory material;

5. The recyclable blood vessel support based on paper folding mechanism as claimed in claim 1, wherein the guiding head is formed with an arc guiding structure facing the insertion side of the insertion needle for guiding the insertion of the insertion needle.

6. The retrievable vascular stent based on a paper folding mechanism according to any one of claims 1 to 3, wherein at least the support members are shaped by means of 3D printing.

7. The retrievable vascular stent based on a paper folding mechanism according to any one of claims 1 to 3, further comprising: the device comprises a hook body, an elastic support, an operating wire, an operating pipe and a conveying pipe;

the operating wire is arranged in the operating pipe;

the operation pipe is arranged inside the transport pipe;

and one side of the operating pipe, which faces the annular bracket, is provided with a limiting ring abutted against the annular bracket.

8. The paper folding mechanism based recyclable vessel stent of claim 7, further comprising: a first magnetic member and a second magnetic member;

9. The retrievable vascular stent based on a paper folding mechanism of claim 7, further comprising: the heating wire is arranged inside the operation wire or wrapped outside the operation wire and used for heating the operation wire to the elastic support and the annular bracket to transfer heat.