CN116831794A - braided stent - Google Patents

braided stent Download PDF

Info

Publication number
CN116831794A
CN116831794A CN202210293587.4A CN202210293587A CN116831794A CN 116831794 A CN116831794 A CN 116831794A CN 202210293587 A CN202210293587 A CN 202210293587A CN 116831794 A CN116831794 A CN 116831794A
Authority
CN
China
Prior art keywords
yarns
yarn
layer
interweaving
interweaving layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210293587.4A
Other languages
Chinese (zh)
Inventor
黄云帆
周炯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shentu Medical Technology Shanghai Co ltd
Original Assignee
Shentu Medical Technology Shanghai Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shentu Medical Technology Shanghai Co ltd filed Critical Shentu Medical Technology Shanghai Co ltd
Priority to CN202210293587.4A priority Critical patent/CN116831794A/en
Priority to PCT/CN2023/079073 priority patent/WO2023179323A1/en
Publication of CN116831794A publication Critical patent/CN116831794A/en
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
    • A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
    • A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
    • A61B17/12118—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm for positioning in conjunction with a stent
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
    • A61B17/12168—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure
    • A61B17/12172—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure having a pre-set deployed three-dimensional shape
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure

Abstract

The invention provides a braided stent, which is of a double-layer tubular structure comprising a first interweaving layer and a second interweaving layer, wherein the wire diameter of first yarns forming the first interweaving layer is smaller than the wire diameter of second yarns forming the second interweaving layer; the first interweaving layer and the second interweaving layer are overlapped to form a plurality of minimum repeated units forming the woven support, and at least one end of each first yarn extends and interweaves with the second yarn located in the edge area of the minimum repeated unit in each minimum repeated unit.

Description

Braided stent
Technical Field
The invention relates to the technical field of medical treatment, in particular to a braided stent.
Background
The braided stent has very wide application in the medical fields of nerve intervention or lower limbs and the like, such as Tubridge dense mesh stents for intracranial aneurysms, silk stents used for auxiliary spring rings, wallstent stents for carotid stenosis treatment and peripheral Supera braided stents.
The braiding process is simpler than the cutting process, and the braided stent can achieve metal coverage that is not achieved by cutting the stent, thus having unique advantages in the field of aneurysms and treatments where plaque coverage is required.
The dense net stent applied to the treatment of the aneurysm requires that the stent has certain metal coverage rate, has a plugging effect on the neck of the aneurysm, improves the blood flow dynamics of a target blood vessel, reduces the impact of blood flow on the tumor wall, has certain radial supporting force and has good adherence; aiming at the in-situ stenosis, the covering of the stent mesh on the plaque of the vessel wall is emphasized, the adverse effect caused by the escape of thrombus to the distal end is avoided, meanwhile, the flexibility of the stent at the tortuosity of the vessel is good, the wall adhesion is still kept, the formation of blood flow vortex is avoided, and meanwhile, the radial support is strong, and the elastic retraction of the vessel to a certain extent can be resisted.
Disclosure of Invention
The present invention is directed to a braided stent that overcomes one or more of the problems of the prior art.
The braided stent provided by the invention is of a double-layer tubular structure comprising a first interweaving layer and a second interweaving layer, wherein the wire diameter of first yarns forming the first interweaving layer is smaller than the wire diameter of second yarns forming the second interweaving layer;
the first interweaving layer and the second interweaving layer are overlapped to form a plurality of minimum repeated units forming the woven support, and at least one end of each first yarn extends and interweaves with the second yarn located in the edge area of the minimum repeated unit in each minimum repeated unit.
Optionally, in the woven stent, m groups of second yarn groups which are sequentially and equidistantly arranged and n groups of second yarn groups which are sequentially and equidistantly arranged are interwoven in each minimum repeating unit; wherein m and n are positive integers greater than or equal to 2.
Optionally, in the woven stent, each of the second yarn groups includes a second yarn, and in each of the minimal repeating units, one end of the first yarn extends and is interwoven with the second yarn arranged at the outermost side.
Optionally, in the woven stent, each of the second yarn groups includes at least two parallel second yarns, at least one end of the first yarn extends and interweaves with the second yarn groups arranged at the outermost side in each of the minimal repeating units, and at least one end of the first yarn extends and interweaves with the second yarn groups at the outermost side to form a crimp structure.
Optionally, in the braided stent, the crimping structure is: the first yarn is located outside any one of the second yarns in the second yarn set and inside the other second yarns in the second yarn set.
Optionally, in the woven support, the stitch structure formed by interweaving the adjacent first yarn and the second yarn group is the same.
Optionally, in the woven stent, two second yarn groups interwoven with each other in the second interweaving layer spiral in opposite spiral directions at a set spiral angle, and each second yarn in each second yarn group is parallel to each other.
Optionally, in the woven stent, two first yarn groups interwoven with each other in the first interweaving layer spiral in opposite spiral directions at the set spiral angle, and each first yarn in each first yarn group is parallel to each other.
Optionally, in the woven stent, two first yarn groups interwoven in the first interweaving layer respectively spiral in opposite spiral directions at the set spiral angle, each first yarn group includes a plurality of mutually parallel sub-yarn groups, and each sub-yarn group includes two first yarns twisted with each other.
Optionally, in the braided stent, the set helix angle is 10 ° to 80 °.
Optionally, in the woven stent, the number of the first yarns in the first interweaving layer is greater than the number of the second yarns in the second interweaving layer.
Optionally, in the braided stent, both ends of the braided stent terminate at any position of the minimal repeating unit.
In summary, according to the woven stent provided by the invention, the woven stent has a double-layer tubular structure including a first interweaving layer and a second interweaving layer, and the filament diameter of a first yarn forming the first interweaving layer is smaller than the filament diameter of a second yarn forming the second interweaving layer; the first interweaving layer and the second interweaving layer are overlapped to form a plurality of minimum repeated units forming the woven support, and at least one end of each first yarn extends and interweaves with the second yarn in each minimum repeated unit.
Compared with the prior art, the method has the following beneficial effects:
(1) The yarn diameter of the yarn forming the second interweaving layer is larger than that of the yarn forming the first interweaving layer, and the second interweaving layer is formed with big meshes, so that the support can be endowed with flexibility;
(2) Further, according to the arrangement condition of the yarns of the second interweaving layer, one or both ends of the first interweaving layer are selected to interweave with the second interweaving layer in a minimum repeating unit; if two ends of the first interweaving layer are respectively provided with more than two yarns of the second interweaving layer, two ends of the first interweaving layer can be interweaved with the yarns of the second interweaving layer, and therefore the unexpected increase of edge meshes can be reduced as much as possible.
(3) In addition, compared with the large mesh formed by single yarns, the parallel yarns can increase the number of heads of the large mesh yarns and provide larger radial supporting force, and the mesh formed by the parallel yarns is larger than the mesh formed by the single yarns under the requirement of the set radial force, so that the whole support has good flexibility and good adherence.
Drawings
FIG. 1 is a schematic diagram of a structure of a twist line in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a minimal repeating unit according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a minimal repeating unit according to a second embodiment of the present invention;
FIG. 4 is a schematic structural view of two minimal repeating units according to a third embodiment of the present invention;
FIG. 5 is a schematic diagram of four minimal repeating units according to a fourth embodiment of the invention;
FIG. 6 is a schematic diagram of a minimal repeating unit according to a fifth embodiment of the invention;
fig. 7 is a schematic structural view of a braided stent according to an embodiment of the present invention.
Wherein, each reference sign is explained as follows:
11-a conventional wire pressing structure; 12-twisting a wire pressing structure; 100-a first interleaving layer; 200-a second interleaving layer.
Detailed Description
The invention will be described in detail with reference to the drawings and the embodiments, in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments. It should be further understood that the terms "first," "second," "third," and the like in this specification are used merely for distinguishing between various components, elements, steps, etc. in the specification and not for indicating a logical or sequential relationship between the various components, elements, steps, etc., unless otherwise indicated.
Referring to fig. 1 to 4, an embodiment of the present invention provides a woven stent, which has a double-layer tubular structure including a first interweaving layer 100 and a second interweaving layer 200, wherein the filament diameter of a first yarn forming the first interweaving layer 100 is smaller than the filament diameter of a second yarn forming the second interweaving layer 200; the first interlacing layer 100 and the second interlacing layer 200 are overlapped to form a plurality of minimum repeating units constituting the knitted stent, and at least one end of each of the first yarns is extended and interlaced with a second yarn located at an edge region of the minimum repeating unit in each of the minimum repeating units.
According to the woven stent provided by the embodiment of the invention, as the wire diameter of the second interweaving layer 200 is larger than that of the first interweaving layer 100, the yarns of the second interweaving layer 200 are formed with large meshes, so that the stent can be endowed with flexibility.
The first interweaving layer 100 is formed by weaving yarns with relatively small wire diameters, small meshes are formed between the yarns, the effect of increasing the metal coverage rate is mainly achieved, in a stent for treating stenosis, the effect of increasing the metal coverage rate can better cover vascular wall plaque, in a blood flow guiding device, the effect of increasing the metal coverage rate can reduce blood entering an aneurysm, the second interweaving layer 200 is formed by weaving yarns with relatively large wire diameters, large meshes are formed between the yarns, and the effect of providing radial support is mainly achieved.
In this embodiment, the first interweaving layer 100 may use a conventional wire pressing structure 11 as shown in fig. 2 to 6, where the conventional wire pressing structure may be 1 press 1, 1 press 2, 2 press 2, etc., and may also use a complex twisting wire pressing structure 12 as shown in fig. 1. Because the second interweaving layer 200 is formed by braiding yarns with larger filament diameters, the number of the second yarns in the second interweaving layer 200 is not too large in consideration of the flexibility of the whole braided stent, and at least the number of the second yarns in the second interweaving layer 200 is ensured to be smaller than the number of the first yarns in the first interweaving layer 100, so that the whole flexibility of the stent is ensured, and the wall attaching performance is good.
Specifically, when the second interweaving layer 200 is overlapped with the first interweaving layer 100, the second interweaving layer 200 may be a frame structure with an area matching the coverage area of the first interweaving layer 100, and in this embodiment, m groups of second yarn groups sequentially and equidistantly arranged and n groups of second yarn groups sequentially and equidistantly arranged are interwoven in each minimum repeating unit; wherein m and n are positive integers greater than or equal to 2, and m may be, for example, 2, 3, etc., and n may be, for example, 2, 3, etc.
In practical application, the number of m and n may be specifically adjusted according to the number of yarns of the first interweaving layer 100, as described above, at least the number of the second yarns of the second interweaving layer 200 needs to be smaller than the number of the first yarns of the first interweaving layer 100, so as to ensure the overall flexibility of the woven support.
In this embodiment, when the first interweaving layer 100 and the second interweaving layer 200 are stacked, the first interweaving layer 100 may be disposed on a lower layer of the second interweaving layer 200, or may be disposed on an upper layer of the second interweaving layer 200, and when at least one end of the first yarn extends and interweaves with the second yarn, the first yarn passes over the second yarn to generate a "mountain-turning effect", so that the first yarn forms a gradient on the second yarn, and the gradient may cause an unexpected increase of meshes at an edge of the woven support.
In view of this, in the present embodiment, one or both ends of each of the first yarns at the minimum repeating unit edge of the first interleaving layer 100 are selected to be interleaved with the second yarns of the second interleaving layer 200 according to the number of yarns in each of the second yarn groups of the second interleaving layer 200. Specifically, if each of the second yarn groups includes one second yarn, in each of the minimum repeating units, one end of the first yarn extends and is interwoven with the second yarns arranged at the outermost side; in addition, if each second yarn group includes at least two parallel second yarns, at least one end of each first yarn extends and interweaves with the second yarn group arranged at the outermost side in each minimum repeating unit, and at least one end of each first yarn extends and interweaves with the second yarn group at the outermost side to form a pressing line structure; that is, if each of the second yarn sets includes two less parallel second yarns, one end or both ends of each of the first yarns may be interwoven with the second yarns, but in order to improve the unexpected increase of the edge mesh to the maximum extent, the coverage of the stent with plaque is improved, preferably, if each of the second yarn sets includes two less parallel second yarns, both ends of each of the first yarns are respectively interwoven with two outermost second yarn sets to form a crimp structure, and the crimp structure may be: the first yarn is located outside any one of the second yarns in the second yarn set and inside the other second yarns in the second yarn set. As shown in fig. 3, the thread pressing structure refers to that a filament is turned over by one thick thread (as shown in fig. 3 a), and then the turned filament is pressed back by the other thick thread (as shown in fig. 3B). Further, in order to improve the uniformity of the edges of the woven structure, the stitch structure formed by interweaving the adjacent first yarn and the second yarn set may be designed to be the same.
The woven stent provided by the present embodiment is illustrated below, and the second interweaving layer 200 may exist in various frame structures.
In the first embodiment, as shown in fig. 2, in each of the minimum repeating units a, the second interlacing layer 200 includes three groups of second yarns (hereinafter referred to as thick yarns) in two mutually perpendicular directions, each group including one thick yarn, which collectively form a "field" shape, and is matched with the coverage area of the first interlacing layer 100 woven from the first yarns (hereinafter referred to as thin yarns), only one end of each thin yarn is interlaced with one of the two thick yarns arranged at the outermost side in the perpendicular direction, and only one end of each thin yarn is interlaced with one of the two thick yarns arranged at the outermost side in the perpendicular direction, so that an unexpected increase of the mesh at the edge can be reduced as much as possible compared with the case where both ends of each thin yarn are interlaced with one of the two thick yarns arranged at the outermost side in the perpendicular direction.
In a second embodiment, as shown in fig. 3, in each minimum repeating unit, the second interweaving layer 200 includes three groups of thick filaments in two mutually perpendicular directions, each group includes two parallel thick filaments, which together form a "field" shape, and the two ends of each thin filament interweave with two groups of thick filaments arranged at the outermost side in the perpendicular direction to form an interweaving structure, that is, after the thin filament turns over the thick filament relatively close to the inner thick filament in the outermost thick filament group, the thin filament of the outer thick filament will generate a back pressure of "mountain turning effect", so as to avoid an unexpected increase of meshes at the edge of the woven bracket.
In the third embodiment, as shown in fig. 4, in each minimum repeating unit c, the second interweaving layer 200 includes three groups of thick filaments aligned in a direction and two groups of thick filaments aligned in a direction perpendicular to the direction, each group of thick filaments includes two thick filaments, which together form a "daily" shape, and both ends of each thin filament interweave with the two groups of thick filaments aligned at the outermost side in the perpendicular direction to form a pressing line structure, which is matched with the coverage area of the first interweaving layer 100 formed by braiding the thin filaments.
In a fourth embodiment, as shown in fig. 5, in each minimum repeating unit d, the second interweaving layer 200 includes two groups of thick filaments in two mutually perpendicular directions, each group includes two parallel thick filaments, which form a "mouth" shape together, and two ends of each thin filament interweave with two groups of thick filaments arranged at the outermost side in the perpendicular direction to form a wire pressing structure, which is matched with the coverage area of the first interweaving layer 100 formed by braiding the thin filaments.
In the fifth embodiment, as shown in fig. 6, in each minimum repeating unit e, the second interlacing layer 200 includes three groups of thick filaments in two mutually perpendicular directions, each group includes three thick filaments in parallel, which collectively form a "field" shape, and each thin filament is interlaced with one of two groups of thick filaments arranged at the outermost side in the perpendicular direction only at one end, which matches the coverage area of the first interlacing layer 100 formed by braiding thin filaments.
From the foregoing examples, it is apparent that, in the woven stent according to the embodiment of the present invention, when the coarse yarn is used to form the second interweaving layer 200, the second interweaving layer 200 may be formed by using a single yarn to form a frame structure (such as "field", "day", "mouth" shape as described above) to match the coverage area of the first interweaving layer 100, and the second interweaving layer 200 may also be formed by using two or more parallel yarns to form a frame structure to match the coverage area of the first interweaving layer 100. Compared with the big mesh formed by single yarns, the parallel yarns can increase the head number of the big mesh yarns and provide larger radial supporting force, and the mesh formed by the parallel yarns is larger than the mesh formed by the single yarns under the requirement of the set radial force, so that the whole support has good flexibility and good adherence.
In addition, it should be understood that, in other embodiments, the second interweaving layer 200 may also use a combination of single yarns and parallel yarns to form a frame structure to match the coverage area of the first interweaving layer 100, which is not described herein.
As shown in fig. 7, in order to improve the flexibility of the support, in this embodiment, two second yarn groups interwoven with each other in the second interweaving layer 200 are respectively spiraled in opposite spiral directions at a set spiral angle, and each of the second yarns in each of the second yarn groups is parallel to each other. The set helix angle may be 10 ° to 80 °.
In order to further improve the flexibility of the support, in this embodiment, the first yarns in the first interweaving layer 100 have the same spiral angle as the second yarns in the second interweaving layer 200, that is, when the first interweaving layer 100 may adopt a conventional crimping structure 11 such as 1-press 1, 1-press 2, 2-press 2, etc., two first yarn groups interweaving with each other in the first interweaving layer 100 spiral respectively in opposite spiral directions at the set spiral angle, and each of the first yarns in each of the first yarn groups is parallel to each other; when the first interweaving layer 100 adopts the complex twisting structure 12, two first yarn groups interweaving with each other in the first interweaving layer 100 respectively spiral in opposite spiral directions at the set spiral angle, each first yarn group includes a plurality of mutually parallel sub-yarn groups, and each sub-yarn group includes two first yarns twisted with each other.
It should be noted that, fig. 7 does not illustrate the interlacing of filaments and thick filaments, but only shows the combination of minimum repeating units. In addition, as shown in fig. 5, both ends of the braided stent in this embodiment may be terminated at any position of the minimum repeating unit.
In summary, according to the woven stent provided by the invention, the woven stent has a double-layer tubular structure including a first interweaving layer and a second interweaving layer, and the filament diameter of a first yarn forming the first interweaving layer is smaller than the filament diameter of a second yarn forming the second interweaving layer; the first interweaving layer and the second interweaving layer are overlapped to form a plurality of minimum repeated units forming the woven support, and at least one end of each first yarn extends and interweaves with the second yarn in each minimum repeated unit. Compared with the prior art, as the wire diameter of the yarn forming the second interweaving layer is larger than that of the yarn forming the first interweaving layer, the second interweaving layer is formed with big meshes, so that the support can be endowed with flexibility; further, according to the arrangement condition of the yarns of the second interweaving layer, one or both ends of the first interweaving layer are selected to interweave with the second interweaving layer, if only one yarn of the second interweaving layer can interweave with the two ends of the first interweaving layer, only one end of the yarn of the first interweaving layer interweaves with the yarn of the second interweaving layer, so that unexpected increase of edge meshes can be reduced as much as possible, and if two or more yarns of the second interweaving layer can interweave with the two ends of the yarn of the first interweaving layer, the two ends of the yarn of the first interweaving layer interweave with the yarn of the second interweaving layer, so that unexpected increase of edge meshes can be improved, and coverage of a bracket on plaque can be improved; in addition, compared with the large mesh formed by single yarns, the parallel yarns can increase the number of heads of the large mesh yarns and provide larger radial supporting force, and the mesh formed by the parallel yarns is larger than the mesh formed by the single yarns under the requirement of the set radial force, so that the whole support has good flexibility and good adherence.
It should also be appreciated that while the present invention has been disclosed in the context of a preferred embodiment, the above embodiments are not intended to limit the invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (12)

1. The woven support is characterized by comprising a double-layer tubular structure with a first interweaving layer and a second interweaving layer, wherein the wire diameter of first yarns forming the first interweaving layer is smaller than the wire diameter of second yarns forming the second interweaving layer;
the first interweaving layer and the second interweaving layer are overlapped to form a plurality of minimum repeated units forming the woven support, and at least one end of each first yarn extends and interweaves with the second yarn located in the edge area of the minimum repeated unit in each minimum repeated unit.
2. The woven stent of claim 1 wherein m sets of second yarns arranged in equal sequence are interwoven with n sets of second yarns arranged in equal sequence in each of the minimal repeating units; wherein m and n are positive integers greater than or equal to 2.
3. The woven stent of claim 2 wherein each of said second yarn sets includes one of said second yarns, and wherein one end of said first yarn extends interwoven with said second yarns disposed outermost in each of said minimal repeating units.
4. The woven stent of claim 2 wherein each of the second yarn sets includes at least two parallel second yarns, at least one end of the first yarn extending into a ravel configuration with the outermost second yarn set in each of the minimal repeating units.
5. The braided stent of claim 4, wherein the crimping structure is: the first yarn is located outside any one of the second yarns in the second yarn set and inside the other second yarns in the second yarn set.
6. The woven stent of claim 4 wherein the stitch configuration formed by interweaving adjacent said first yarns with said second yarn sets is the same.
7. The woven stent of claim 1 wherein the two sets of second yarns interwoven in the second interweaving layer each spiral in opposite spiral directions at a set spiral angle, and wherein each of the second yarns in each of the second yarn sets are parallel to each other.
8. The woven stent of claim 7 wherein the two sets of first yarns interwoven in the first interweaving layer each spiral in opposite spiral directions at the set spiral angle and wherein each of the first yarns in each of the first sets of yarns are parallel to each other.
9. The woven stent of claim 7 wherein the two sets of first yarns interwoven in the first interweaving layer each spiral in opposite spiral directions at the set spiral angle, each set of first yarns comprising a plurality of mutually parallel sets of sub-yarns, each set of sub-yarns comprising two first yarns twisted about each other.
10. The braided stent of any one of claims 7-9, wherein the set helix angle is from 10 ° to 80 °.
11. The woven stent of claim 1 wherein the number of first yarns in the first interweaving layer is greater than the number of second yarns in the second interweaving layer.
12. The braided stent of claim 1, wherein both ends of the braided stent terminate at any location of the minimal repeating unit.
CN202210293587.4A 2022-03-23 2022-03-23 braided stent Pending CN116831794A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202210293587.4A CN116831794A (en) 2022-03-23 2022-03-23 braided stent
PCT/CN2023/079073 WO2023179323A1 (en) 2022-03-23 2023-03-01 Woven scaffold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210293587.4A CN116831794A (en) 2022-03-23 2022-03-23 braided stent

Publications (1)

Publication Number Publication Date
CN116831794A true CN116831794A (en) 2023-10-03

Family

ID=88099896

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210293587.4A Pending CN116831794A (en) 2022-03-23 2022-03-23 braided stent

Country Status (2)

Country Link
CN (1) CN116831794A (en)
WO (1) WO2023179323A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB751392A (en) * 1953-03-30 1956-06-27 Tech Du Verre Tisse Reinforcing woven materials for making laminated articles
AU2013231845B2 (en) * 2012-03-16 2017-07-06 Terumo Corporation Stent and stent delivery device
DE102014107113A1 (en) * 2014-05-20 2015-11-26 Acandis Gmbh & Co. Kg Medical device and system
JP6892623B2 (en) * 2016-07-07 2021-06-23 ニプロ株式会社 Stent
CN111249046B (en) * 2020-01-22 2023-08-08 北京立德微创科技有限公司 Lumen dense net support
CN112155814B (en) * 2020-09-27 2022-05-13 艾柯医疗器械(北京)有限公司 Low thrombus intracranial blood vessel braided stent and treatment method thereof
CN217772600U (en) * 2022-03-23 2022-11-11 神途医疗科技(上海)有限公司 Braided stent

Also Published As

Publication number Publication date
WO2023179323A1 (en) 2023-09-28

Similar Documents

Publication Publication Date Title
CN110742709B (en) Aorta bare stent and aorta interlayer stent
JP2002522163A (en) Woven stent / graft structures
US8978533B2 (en) Medical implant and method for producing medical implant
CN109481109B (en) Braided stent
CN111887925A (en) Novel close net support
CN115553972B (en) Biliary tract stent manufacturing method and biliary tract stent
JPWO2019230730A1 (en) Cloth material with electrode wiring
CN111134920A (en) Close net support
CN217772600U (en) Braided stent
CN113198083B (en) Ureteral stent and manufacturing method thereof
CN215083906U (en) Pipe enhancement layer and pipe
CN116831794A (en) braided stent
CN113133856B (en) Z-shaped woven support
CN111249046A (en) Close net support of lumen
CN212382692U (en) Novel close net support
CN212490281U (en) Novel close net support
CN113367863B (en) Medical support and braiding method
CN201150579Y (en) Blood vessel weaving stent with outer-layer lobate structure
CN115702842A (en) Medical support
CN218484711U (en) Medical support
CN115957057A (en) Medical stent and manufacturing method thereof
WO2023284595A1 (en) Medical stent
CN113040988B (en) Vascular stent
CN116370008B (en) Multi-pitch woven support
CN219074239U (en) Biliary tract support manufacturing clamp

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination