CN116672021A - Support frame - Google Patents

Support frame Download PDF

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Publication number
CN116672021A
CN116672021A CN202310679147.7A CN202310679147A CN116672021A CN 116672021 A CN116672021 A CN 116672021A CN 202310679147 A CN202310679147 A CN 202310679147A CN 116672021 A CN116672021 A CN 116672021A
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CN
China
Prior art keywords
annular
shaped
waveform
support bar
wave
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
CN202310679147.7A
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Chinese (zh)
Inventor
崔亚飞
王格
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.)
Shanghai Li Kai Technology Co ltd
Original Assignee
Shanghai Li Kai Technology 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 Shanghai Li Kai Technology Co ltd filed Critical Shanghai Li Kai Technology Co ltd
Priority to CN202310679147.7A priority Critical patent/CN116672021A/en
Publication of CN116672021A publication Critical patent/CN116672021A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • A61B17/12177—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure comprising additional materials, e.g. thrombogenic, having filaments, having fibers or being coated
    • 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
    • A61F2/91—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00831—Material properties
    • A61B2017/00902—Material properties transparent or translucent
    • A61B2017/00915—Material properties transparent or translucent for radioactive radiation
    • A61B2017/0092—Material properties transparent or translucent for radioactive radiation for X-rays
    • 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
    • A61F2/91—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/9155—Adjacent bands being connected to each other
    • A61F2002/91575—Adjacent bands being connected to each other connected peak to trough
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
    • A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Reproductive Health (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Neurosurgery (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Prostheses (AREA)

Abstract

A stent is disclosed, comprising a proximal end portion, a first body portion, a middle portion, a second body portion and a distal end portion, all of which are connected in sequence, each of which is composed of a ring-shaped wave-shaped supporting rod; the first body part and the second body part are respectively composed of a first annular waveform supporting rod and a second annular waveform supporting rod which are alternately arranged in a Z-shaped waveform, and each Z-shaped waveform comprises a plurality of V-shaped structures; the middle part is provided with a developing mark, the developing mark comprises two first annular waveform support rods, part of the V-shaped structure is replaced by a Y-shaped structure, the Y-shaped structure is provided with a rod-shaped fixing part parallel to the axial direction of the support, and the fixing part is provided with the developing mark; the length of the Y-shaped structure in the axial direction is smaller than or equal to the length of the V-shaped structure in the axial direction. The support has higher radial supporting force, greatly enhances the flexibility and the expansibility of the support, improves the bending performance of the support, and has simple structure and easy implementation; and facilitates the determination of the specific location of the middle portion of the stent after the stent has been fully released.

Description

Support frame
The application is a division of Chinese application patent application with the application number of CN 202210485907.6, the application date of 2022, 05 and 06 days and the application name of 'a bracket'.
Technical Field
The invention relates to the field of nerve intervention, in particular to a bracket.
Background
The dense net stent is generally selected to reconstruct blood flow for treating cerebral vascular hemorrhage or assist the stent to assist the spring ring embolism treatment, and the common operation strategy is to firstly establish a passage, then convey the stent or the spring ring and other instruments to the lesion site, push out the stent or the spring ring, block the lesion vascular aneurysm and complete the operation. The auxiliary stent is used for assisting the coil embolism treatment, the requirement on the stent is high, the stent has enough flexibility and good adherence performance, and the stent is visible under X-rays, so that a user can conveniently judge the opening state of the stent.
Disclosure of Invention
The invention provides a stent, which comprises a proximal end part, a first main body part, a middle part, a second main body part and a distal end part which are sequentially connected from the proximal end to the distal end; wherein the proximal portion, the first body portion, the intermediate portion, the second body portion, and the distal portion are each comprised of a ring-shaped wave support bar; the first body part and the second body part are respectively composed of a first annular waveform supporting rod and a second annular waveform supporting rod which are alternately arranged, the first annular waveform supporting rod and the second annular waveform supporting rod are Z-shaped waveforms, and each Z-shaped waveform comprises a plurality of V-shaped structures; the length of the Z-shaped waveform of the first annular waveform supporting rod in the axial direction is larger than that of the Z-shaped waveform of the second annular waveform supporting rod in the axial direction; the middle part is provided with a developing mark; the middle part comprises two first annular waveform support rods, part of the V-shaped structure of the middle part is replaced by a Y-shaped structure, the Y-shaped structure is provided with a rod-shaped fixing part parallel to the axial direction of the support, and the fixing part is provided with a developing mark; the length of the Y-shaped structure of the first annular waveform supporting rod of the middle part in the axial direction is smaller than or equal to the length of the V-shaped structure of the first annular waveform supporting rod of the middle part in the axial direction.
By using the support, the length of the Z-shaped waveform of the first annular waveform support rod in the axial direction is larger than that of the Z-shaped waveform of the second annular waveform support rod in the axial direction, so that the support has higher radial support force, the flexibility and the expansibility of the support can be greatly enhanced, the overstretching performance of the support is improved, and meanwhile, the support is simple in structure and easy to implement; and the developing mark is arranged on the middle part, so that the specific position of the middle part of the bracket can be determined after the bracket is completely released. The length of the Y-shaped structure of the first annular waveform support bar in the axial direction is smaller than or equal to the length of the V-shaped structure of the first annular waveform support bar in the axial direction, so that the spaced free ends are realized, and the situation that the fixed part of the first annular waveform support bar adjacent to the first main body part in the middle part is overlapped with the fixed part of the first annular waveform support bar 5 adjacent to the second main body part in the axial direction is avoided, so that the developing mark of the first main body part is not overlapped with the developing mark of the second main body part in the axial direction, and the overall non-transmission line length of the middle part is twice the length of the developing mark in the compressed state. And the length is twice, so that the operator can observe better.
In one embodiment, the junction of the top end of the V-shaped structure of the first annular wave support bar where the intermediate portion adjoins the first body portion and the top end of the V-shaped structure of the first annular wave support bar where the intermediate portion adjoins the second body portion forms the junction of the intermediate portion. By this embodiment, the intermediate portion has sufficient supporting force, and the supporting force is not excessive, and the flexibility of the bracket is ensured.
In one embodiment, the plurality of Y-shaped structures of the first annular wave shaped support bar, the middle portion of which is adjacent to the first body portion, are evenly distributed in the circumferential direction with the free ends of the fixing portions of the Y-shaped structures directed toward the second body portion, and the plurality of Y-shaped structures of the first annular wave shaped support bar, the middle portion of which is adjacent to the second body portion, are evenly distributed in the circumferential direction with the free ends of the fixing portions of the Y-shaped structures directed toward the first body portion; the free ends of the fixing portions of the first annular wave support bar, the intermediate portion of which abuts the first body portion, are axially spaced from the free ends of the fixing portions of the first annular wave support bar, the intermediate portion of which abuts the second body portion. By this embodiment, it is advantageous for the development marks 9 to be evenly distributed in the middle portion 14 of the stent, and for the development marks to clearly identify the open state of the middle of the stent after the stent is completely released; and when the support is in a compressed state, the radial volume of the support can be reduced, and the pushing resistance is reduced.
In one embodiment, each of the Y-shaped structures of the first annular wave support bar of the intermediate portion adjacent to the first body portion is staggered circumferentially with each of the Y-shaped structures of the first annular wave support bar of the intermediate portion adjacent to the second body portion; the included angle of the circle centers corresponding to the adjacent two Y-shaped structures is a fixed value. By the embodiment, when the support is in a compressed state, the radial volume of the support can be reduced, and pushing resistance is reduced; after the bracket is opened, the developing mark is beneficial for an operator to locate the middle part of the bracket.
In one embodiment, each of the Y-shaped structures of the first annular wave shaped support bar of the intermediate portion adjacent the first body portion is disposed co-linearly with each of the Y-shaped structures of the first annular wave shaped support bar of the intermediate portion adjacent the second body portion. The method is beneficial to fixing the developing mark more conveniently and enables the developing mark to be observed and positioned more easily.
In one embodiment, the first annular wave support bar with the intermediate portion abutting the first body portion and the first annular wave support bar with the intermediate portion abutting the second body portion each comprise two of the Y-shaped structures. With this embodiment, it is advantageous that the developing mark clearly identifies the open state of the middle of the stent after the stent is completely released, since there are enough developing marks.
In one embodiment, the density of the Z-shaped wave of the first annular wave support bar in the circumferential direction is smaller than the density of the Z-shaped wave of the second annular wave support bar in the circumferential direction. With this embodiment, the density of the Z-shaped waveform of the second annular waveform support bar in the circumferential direction is small, which is advantageous for improving the expansion performance of the stent.
In one embodiment, a connection point is formed between the first annular waveform support bar and the second annular waveform support bar, and the connection point is located at a position where a trough of the Z-shaped waveform of the first annular waveform support bar meets a crest of the Z-shaped waveform of the second annular waveform support bar and a position where a crest of the Z-shaped waveform of the first annular waveform support bar meets a trough of the Z-shaped waveform of the second annular waveform support bar. Through the embodiment, the support has enough supporting force, the supporting force is not excessive, and meanwhile, the flexibility of the support is ensured.
In one embodiment, the proximal portion comprises two first annular wave shaped support bars axially juxtaposed or two second annular wave shaped support bars axially juxtaposed; and/or the distal end portion comprises two first annular waveform support bars axially arranged in parallel, or the distal end portion comprises two second annular waveform support bars axially arranged in parallel. With this embodiment, the proximal and distal portions of the closed loop design are advantageously formed, and free ends are effectively prevented from puncturing the vessel wall.
In one embodiment, the proximal portion comprises two first annular waveform support bars axially arranged in parallel, and the first main body portion is connected with the proximal portion through a second annular waveform support bar; the proximal end part comprises two second annular waveform support rods which are axially distributed in parallel, and the first main body part is connected with the proximal end part through the first annular waveform support rods; the distal end part comprises two first annular waveform support rods which are axially distributed in parallel, and the second main body part is connected with the distal end part through the second annular waveform support rods; the distal end portion comprises two second annular waveform support rods which are axially distributed in parallel, and the second main body portion is connected with the distal end portion through the first annular waveform support rods. With this embodiment, the formation of a tapered mouth is facilitated by the fewer connection points of the proximal portion to the first body portion and the fewer connection points of the distal portion to the second body portion.
In one embodiment, the connection between the proximal portion and the first body portion forms a tapered opening after deployment of the stent, the tapered opening having a generatrix at an angle of 30 to 60 degrees to the axis; the connection part of the distal end part and the second main body part forms a conical opening after the bracket is unfolded, and the included angle between the generatrix of the conical opening and the axis is 30-60 degrees. Through this embodiment, set up the toper mouth that expands outward, can promote the radial holding power at support both ends, can effectively solve the support and receive the displacement problem that blood flow impacted and produced in the blood vessel again.
In one embodiment, a fixation rod is arranged on the first or second annular wave support rod remote from the proximal end portion of the first body portion or remote from the distal end portion of the second body portion; at the distal end portion, the fixation rod extends from a peak of a Z-waveform of the first annular waveform support rod or the second annular waveform support rod; at the proximal end portion, the fixation rod extends from the trough of the Z-shaped wave of the first or second annular wave support rod; the fixing rods are uniformly distributed along the circumferential direction; the fixing rod is provided with a developing mark. With this embodiment, the distal end portion and the proximal end portion of the stent can be effectively positioned by the development mark.
In one embodiment, either the proximal portion or the distal portion includes four of the fixation rods. With this embodiment, it is advantageous to have enough development marks to clearly identify the open state of the proximal and distal portions of the stent after the stent is fully released.
In one embodiment, the developing indicia is a radio-opaque spring or developing metal ring, and the developing indicia is affixed to the stent by laser welding or spot-gluing. According to the embodiment, the developing mark can be firmly fixed on the bracket, so that the safety performance of the bracket is improved.
In one embodiment, the stent is formed by laser cutting an alloy tube. With this embodiment, the manufacturing of the stent is facilitated.
Compared with the prior art, the bracket provided by the application has the following beneficial effects.
1. By utilizing the support, the length of the Z-shaped waveform of the first annular waveform support rod in the axial direction is greater than that of the Z-shaped waveform of the second annular waveform support rod in the axial direction, and the middle part is provided with the developing mark, so that the support has higher radial supporting force, the flexibility and the expansibility of the support can be greatly enhanced, the bending performance of the support is improved, meanwhile, the structure is simple, the implementation is easy, and the specific position of the middle part of the support is determined after the support is completely released.
2. The fixing part and the fixing rod are arranged to be beneficial to fixing the developing mark.
3. The free end of the fixing part of the first annular waveform support rod, the middle part of which is adjacent to the first main body part, is axially spaced from the free end of the fixing part of the first annular waveform support rod, the middle part of which is adjacent to the second main body part, so that the development marks are uniformly distributed in the middle part of the bracket, and the development marks can clearly mark the opening state of the middle part of the bracket after the bracket is completely released; and when the support is in a compressed state, the radial volume of the support can be reduced, and the pushing resistance is reduced.
The above-described features may be combined in various suitable ways or replaced by equivalent features as long as the object of the present invention can be achieved.
Drawings
The present invention will become more fully understood from the detailed description given herein below and the accompanying drawings, wherein like elements are numbered alike, wherein:
FIG. 1 shows a schematic view of a stent according to an embodiment of the present invention, the stent being in a flat deployed state;
FIG. 2 shows a schematic view of a stent with development marks in a flat deployed state according to an embodiment of the present invention;
FIG. 3 is a schematic view showing a structure of a frame with a developing mark according to an embodiment of the present invention, the frame being in a three-dimensional state;
FIG. 4 shows a schematic view of a stent according to another embodiment of the present invention, the stent being in a flat deployed state;
FIG. 5 shows a schematic view of a stent with development marks according to another embodiment of the invention, the stent being in a flat deployed state;
FIG. 6 shows the stent in DAS bypass mode with the visualization markers in the middle of the stent positioned at the tumor ostia;
FIG. 7 shows the stent in DAS contrast mode with the stent fully released and the developing indicia clearly identifying the open state of the stent;
FIG. 8 shows that the stent has excellent adhesion properties at a 4 mm bend radius;
fig. 9 shows a schematic view of a stent according to still another embodiment of the present invention, which is in a flat-expanded state, and in which a groove-like structure is provided on a fixing rod of a proximal end portion of the stent.
List of reference numerals:
1-a proximal portion; 2-a first body portion; 3-a second body portion; 4-a distal portion; 5-a first annular waveform support bar; 6-a second annular waveform support bar; 7-V-shaped structure; an 8-Y structure; 9-developing the mark; 10-a fixing part; 11-a fixed rod; 12-a conical mouth; 13-a trough-like structure; 14-middle part.
Detailed Description
The technical scheme of the present invention will be described in further detail below by way of examples with reference to the accompanying drawings, but the present invention is not limited to the following examples.
The proximal portion 1 of the present invention refers to the end of the stent that is proximal to the operator after implantation of the stent in a vessel, and the distal portion 4 is the end that is distal to the operator. In fig. 1 to 5, the proximal portion 1 is arranged on the right side of the stent and the distal portion 4 is arranged on the left side of the stent. The definition of peaks and valleys is: the proximal end of the bracket is taken as an origin, the axial direction of the bracket is taken as the positive axial direction from the proximal end to the distal end of the bracket, and the coordinates of the wave crests of the same annular waveform support rod are larger than those of the wave troughs of the same annular waveform support rod.
As shown in fig. 1 to 5, the present embodiment provides a stent comprising a proximal end portion 1, a first body portion 2, an intermediate portion 14, a second body portion 3, and a distal end portion 4 connected in this order from the proximal end to the distal end; wherein the proximal end portion 1, the first body portion 2, the intermediate portion 14, the second body portion 3 and the distal end portion 4 are each constituted by a ring-shaped wave-shaped support bar; the first body part 2 and the second body part 3 are composed of a first annular waveform supporting rod 5 and a second annular waveform supporting rod 6 which are alternately arranged, wherein the first annular waveform supporting rod 5 and the second annular waveform supporting rod 6 are Z-shaped waveforms, and each Z-shaped waveform comprises a plurality of V-shaped structures 7; the length of the Z-shaped waveform of the first annular waveform support bar 5 in the axial direction is longer than that of the Z-shaped waveform of the second annular waveform support bar 6 in the axial direction; the intermediate portion 14 is provided with a developing mark 9.
The first annular waveform support bar 5 and the second annular waveform support bar 6 have substantially the same waveform, i.e., the ratio of wavelength to amplitude is constant, but the length of the Z-shaped waveform of the first annular waveform support bar 5 in the axial direction is longer than that of the Z-shaped waveform of the second annular waveform support bar 6, i.e., the first annular waveform support bar 5 has a larger amplitude with respect to the second annular waveform support bar 6, and correspondingly, the first annular waveform support bar 5 has a longer wavelength with respect to the second annular waveform support bar 6.
Optionally, the wavelength ratio of the first annular waveform support bar 5 to the second annular waveform support bar 6 is 3 to 2, that is, the total wavelength of the two V-shaped structures 7 of the first annular waveform support bar 5 is equal to the total wavelength of the 3V-shaped structures 7 of the second annular waveform support bar 6. Alternatively, the first annular corrugated strut 5 includes 8V-shaped structures 7, and the second annular corrugated strut 6 includes 12V-shaped structures 7, and since the wavelength ratio of the first annular corrugated strut 5 to the second annular corrugated strut 6 is 3 to 2, the total length in the circumferential direction and the radial direction of the first annular corrugated strut 5 is equal to the total length in the circumferential direction and the radial direction of the second annular corrugated strut 6, that is, the total wavelength of the first annular corrugated strut 5 is equal to the total wavelength of the second annular corrugated strut 6.
In the axial direction, the number of the annular waveform support rods forming the support is set according to actual needs, and the first main body part and the second main body part can comprise the same number or different numbers of annular waveform support rods; alternatively, as shown in fig. 1, the first body portion 2 and the second body portion 3 of the bracket may each include 6 annular waveform support bars, wherein 3 first annular waveform support bars 5 and 3 second annular waveform support bars 6 are included in the 6 annular waveform support bars.
Alternatively, the cross-sectional dimension of the first annular corrugated strut 5 is larger than the cross-sectional dimension of the second annular corrugated strut 6, i.e. the second annular corrugated strut 6 is finer than the first annular corrugated strut 5.
The first body part 2 and the second body part 3 are composed of the first annular waveform supporting rods 5 and the second annular waveform supporting rods 6 which are alternately arranged, and the axial connection strength and the radial supporting force are ensured to be uniformly distributed along the axial direction and the deformation of the bracket is uniform when the bracket stretches or bends due to the alternate arrangement of the first annular waveform supporting rods 5 and the second annular waveform supporting rods 6; meanwhile, the length of the second annular waveform support rod 6 in the axial direction is smaller, so that the support has higher flexibility, expansibility and overstretching performance compared with the support formed by the first annular waveform support rod 5; in addition, the second annular waveform support rod 6 is finer than the first annular waveform support rod 5, so that the stent is easier to stretch at the second annular waveform support rod 6, and the stent has better expansion performance compared with the stent which is formed by all the first annular waveform support rods 5; the cross-sectional dimension of the first annular wave-shaped supporting rod 5 is larger than the cross-sectional dimension of the second annular wave-shaped supporting rod 6, so that the support has larger radial supporting force at the first annular wave-shaped supporting rod 5, and the radial supporting force of the whole support is larger compared with the support formed by the second annular wave-shaped supporting rods 6.
Meanwhile, the support is simple in structure and easy to implement.
The intermediate portion 14 of the stent is provided with a developing mark 9 to facilitate the determination of the specific position of the intermediate portion 14 of the stent after the stent has been fully released.
By using the support, the length of the Z-shaped waveform of the first annular waveform support rod 5 in the axial direction is larger than that of the Z-shaped waveform of the second annular waveform support rod 6 in the axial direction, so that the support has higher radial supporting force, the flexibility and the expansibility of the support can be greatly enhanced, the overstretching performance of the support is improved, and meanwhile, the support is simple in structure and easy to implement; the intermediate portion 14 is provided with a development mark to facilitate the determination of the specific position of the intermediate portion 14 of the stent after the stent has been fully released.
In one embodiment, the intermediate portion 14 comprises two first annular wave shaped support bars 5 and part of the V-shaped structure 7 of the intermediate portion 14 is replaced by a Y-shaped structure 8, the Y-shaped structure 8 having a rod-like fixing portion 10 parallel to the axial direction of the support, the fixing portion 10 being provided with a developing mark 9.
With this embodiment, the rod-like fixing portion 10 of the Y-shaped structure 8 provides a fixing position for the developing mark 9, facilitating the mounting and fixing of the developing mark 9.
In one embodiment, the junction of the top end of the V-shaped structure 7 of the first annular wave support bar 5 where the intermediate portion 14 abuts the first body portion 2 and the top end of the V-shaped structure 7 of the first annular wave support bar 5 where the intermediate portion 14 abuts the second body portion 3 forms the junction of the intermediate portion 14.
The Y-shaped structures 8 are all open-loop structures, i.e. the rod-shaped fixing portion 10 of the Y-shaped structure 8 of the first annular wave-shaped support rod 5 of the intermediate portion 14 adjoining the first body portion 2 has a free end facing the second body portion 3, and the rod-shaped fixing portion 10 of the Y-shaped structure 8 of the first annular wave-shaped support rod 5 of the intermediate portion 14 adjoining the second body portion 3 has a free end facing the first body portion 2.
Part of the V-shaped structures 7 are open-loop structures, and the rest of the V-shaped structures 7 are closed-loop structures.
When the V-shaped structure 7 of the first annular wavy strut 5 with the middle part 14 adjacent to the first main body part 2 is adjacently arranged with the Y-shaped structure 8 of the first annular wavy strut 5 with the middle part 14 adjacent to the second main body part 3, the V-shaped structure 7 is an open loop structure, i.e. the top end of the V-shaped structure 7 is not connected with other parts of the bracket; when the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 adjacent to the first body portion 2 is arranged adjacent to the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 adjacent to the second body portion 3, the V-shaped structure 7 is a closed loop structure, i.e. the top end of the V-shaped structure 7 is connected to the rest of the stent.
Similarly, when the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 abutting the second body portion 3 is disposed adjacent to the Y-shaped structure 8 of the first annular wave support bar 5 with the intermediate portion 14 abutting the first body portion 2, the V-shaped structure 7 is an open loop structure, i.e., the tip of the V-shaped structure 7 is not connected to the rest of the stent; when the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 adjacent to the second body portion 3 is disposed adjacent to the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 adjacent to the first body portion 2, the V-shaped structure 7 is a closed loop structure, i.e. the top end of the V-shaped structure 7 is connected to the rest of the stent.
The closed loop V-shaped structure 7 of the intermediate portion 14 provides sufficient support for the stent; the open-loop V-shaped structure 7 and the open-loop Y-shaped structure 8 can effectively avoid overlarge supporting force, and the flexibility of the bracket is ensured due to the large bending freedom degree.
With this embodiment, the intermediate portion 14 has sufficient supporting force without excessive supporting force, and flexibility of the bracket is ensured.
In one embodiment, as shown in fig. 1 to 5, the plurality of Y-shaped structures 8 of the first annular wave shaped support bar 5, the intermediate portion 14 being adjacent to the first body portion 2, are evenly distributed in the circumferential direction and the free ends of the fixing portions 10 of the Y-shaped structures 8 are directed to the second body portion 3, the plurality of Y-shaped structures 8 of the first annular wave shaped support bar 5, the intermediate portion 14 being adjacent to the second body portion 3, are evenly distributed in the circumferential direction and the free ends of the fixing portions 10 of the Y-shaped structures 8 are directed to the first body portion 2; the free end of the intermediate portion 14 abutting the fixing portion 10 of the first annular wave support bar 5 of the first body portion 2 is axially spaced from the free end of the intermediate portion 14 abutting the fixing portion 10 of the first annular wave support bar 5 of the second body portion 3.
The free ends of the fixing portions 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the first main body portion 2, and the free ends of the fixing portions 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the second main body portion 3, are axially spaced apart, that is, the length of the Y-shaped structures 8 of the first annular wave support bar 5 in the axial direction is equal to or less than the length of the V-shaped structures 7 of the first annular wave support bar 5 in the axial direction to thereby achieve the spaced apart free ends, it is avoided that the fixing portions 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the first main body portion 2, and the fixing portions 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the second main body portion 3, overlap in the axial direction, so that the developing marks 9 of the first main body portion 2 and the developing marks 9 of the second main body portion 3 do not overlap in the axial direction, so that, in the compressed state, the intermediate portion overall radiopaque length is twice the length of the developing marks 9. And the length is twice, so that the operator can observe better.
More importantly, the free end of the fixing portion 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the first main body portion 2, is axially spaced from the free end of the fixing portion 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the second main body portion 3, so that the developing mark 9 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the first main body portion 2, is axially spaced from the developing mark 9 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the second main body portion 3, and when the stent is in a compressed state, the radial volume of the stent can be reduced, and the push resistance can be reduced.
By this embodiment, an even distribution of the developing marks 9 in the middle portion 14 of the stent is facilitated, and after the stent is completely released, the developing marks 9 clearly identify the open state of the middle of the stent; and when the support is in a compressed state, the radial volume of the support can be reduced, and the pushing resistance is reduced.
In one embodiment, as shown in fig. 1 to 3, each Y-shaped structure 8 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the first body portion 2, is staggered in the circumferential direction with each Y-shaped structure 8 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the second body portion 3; the included angle of the circle centers corresponding to the two adjacent Y-shaped structures 8 is a fixed value, wherein the two adjacent Y-shaped structures 8 respectively belong to the two first annular waveform support rods 5 of the middle part 14.
The staggered Y-shaped structures 8 can reduce pushing resistance. Meanwhile, in the compressed state, since the developing mark 9 of the first annular waveform support bar 5 of which the intermediate portion 14 is adjacent to the first main body portion 2 is not overlapped with the developing mark 9 of the first annular waveform support bar 5 of which the intermediate portion 14 is adjacent to the second main body portion 3 in the axial direction, the length of the overall radiopacity of the intermediate portion is twice that of the developing mark 9, and the length of the two times is beneficial for the operator to observe better. After the stent is opened, the developing mark 9 facilitates the operator to locate the position of the stent. A 'V' -shaped structure
By the embodiment, when the support is in a compressed state, the radial volume of the support can be reduced, and pushing resistance is reduced; after the stent is opened, the developing mark 9 facilitates the operator to locate the position of the middle portion 14 of the stent.
In one embodiment, as shown in fig. 4 and 5, each Y-shaped structure 8 of the first annular wave shaped support bar 5 with the intermediate portion 14 abutting the first body portion 2 is arranged co-linearly with each Y-shaped structure 8 of the first annular wave shaped support bar 5 with the intermediate portion 14 abutting the second body portion 3.
In the compressed state, since the developing mark 9 of the first annular wavy strut 5 of which the intermediate portion 14 adjoins the first main body portion 2 is misaligned with the developing mark 9 of the first annular wavy strut 5 of which the intermediate portion 14 adjoins the second main body portion 3 in the axial direction, the overall radiopaque length of the intermediate portion is twice the length of the developing mark 9, and the length of the doubled length is favorable for the operator to observe better.
The co-linear arrangement of the Y-shaped structures 8 facilitates a more convenient fixation of the developing indicia 9.
Alternatively, as shown in fig. 5, two developing marks 9 arranged in line may be formed as a single body, thereby facilitating easier observation and positioning of the developing marks 9.
With this embodiment, it is advantageous to fix the developing mark 9 more conveniently, and to make the developing mark 9 easier to observe and locate.
In one embodiment, as shown in fig. 1-3, the first annular wave support bar 5 with the intermediate portion 14 abutting the first body portion 2 and the first annular wave support bar 5 with the intermediate portion 14 abutting the second body portion 3 each comprise two Y-shaped structures 8.
The intermediate portion 14 is disposed 180 degrees apart from the two Y-shaped structures 8 of the first annular wave shaped support bar 5 adjacent to the first body portion 2, and the intermediate portion 14 is disposed 180 degrees apart from the two Y-shaped structures 8 of the first annular wave shaped support bar 5 adjacent to the second body portion 2. The middle part 14 is adjacent to the first annular wave-shaped supporting rod 5 of the first main body part 2, and 3V-shaped structures 7 are arranged between the two Y-shaped structures 8; and 3V-shaped structures 7 are provided between the two Y-shaped structures 8 of the first annular wave shaped support bar 5, the intermediate portion 14 of which adjoins the second body portion 3.
Optionally, each Y-shaped structure 8 of the first annular corrugated strut 5 with the intermediate portion 14 abutting the first main body portion 2 is staggered with respect to each Y-shaped structure 8 of the first annular corrugated strut 5 with the intermediate portion 14 abutting the second main body portion 3, and the included angle between the centers of the corresponding centers of the adjacent Y-shaped structures 8 is 90 degrees, wherein each of the adjacent Y-shaped structures 8 includes a V-shaped structure 7 with the intermediate portion 14 abutting the first annular corrugated strut 5 of the first main body portion 2 and a V-shaped structure 7 with the intermediate portion 14 abutting the first annular corrugated strut 5 of the second main body portion 3, and one V-shaped structure 7 with the intermediate portion 14 abutting the first annular corrugated strut 5 of the first main body portion 2 and one V-shaped structure 7 with the intermediate portion 14 abutting the first annular corrugated strut 5 of the second main body portion 3 are disposed between the adjacent Y-shaped structures 8.
Optionally, each Y-shaped structure 8 of the first annular corrugated supporting rod 5 with the middle portion 14 adjacent to the first main body portion 2 is arranged in a collinear manner with each Y-shaped structure 8 of the first annular corrugated supporting rod 5 with the middle portion 14 adjacent to the second main body portion 3, and the included angle between the centers of circles of the adjacent two Y-shaped structures 8 is 180 degrees.
Alternatively, as shown in fig. 4 and 5, the first annular wave support bar 5 with the intermediate portion 14 abutting the first body portion 2 and the first annular wave support bar 5 with the intermediate portion 14 abutting the second body portion 3 each comprise 4Y-shaped structures 8; each Y-shaped structure 8 of the first annular wave-shaped supporting rod 5 with the middle part 14 adjacent to the first main body part 2 is arranged in a collinear way with each Y-shaped structure 8 of the first annular wave-shaped supporting rod 5 with the middle part 14 adjacent to the second main body part 3, and the included angle of the circle centers corresponding to the two adjacent Y-shaped structures 8 is 90 degrees.
With this embodiment, it is advantageous that the developing mark 9 clearly identifies the open state of the middle of the stent after the stent is completely released, since there are enough developing marks 9.
In one embodiment, the density of the Z-shaped waveform of the first annular waveform support bar 5 in the circumferential direction is smaller than that of the Z-shaped waveform of the second annular waveform support bar 6; the circumferential width of each V-shaped structure 7 of the Z-shaped wave form of the first annular wave form supporting rod 5 is larger than the circumferential width of each V-shaped structure 7 of the Z-shaped wave form of the second annular wave form supporting rod 6.
Alternatively, the ratio of the density of the zigzag waveform of the first annular waveform support bar 5 in the circumferential direction to the density of the zigzag waveform of the second annular waveform support bar 6 in the circumferential direction is 2 to 3. The ratio of the circumferential width of each V-shaped structure 7 of the Z-shaped wave form of the first annular wave form support bar 5 to the circumferential width of each V-shaped structure 7 of the Z-shaped wave form of the second annular wave form support bar 6 is 3 to 2.
With this embodiment, the density of the Z-shaped waveform of the second annular waveform support bar 6 in the circumferential direction is small, which is advantageous for improving the expansion performance of the stent.
In one embodiment, as shown in fig. 1 to 5, a connection point is formed between the first annular waveform support bar 5 and the second annular waveform support bar 6, the connection point being located at a place where a trough of the Z-shaped waveform of the first annular waveform support bar 5 meets a crest of the Z-shaped waveform of the second annular waveform support bar 6 and at a place where a crest of the Z-shaped waveform of the first annular waveform support bar 5 meets a trough of the Z-shaped waveform of the second annular waveform support bar 6.
Alternatively, the ratio of the wavelength of the first annular wave shaped support bar 5 to the wavelength of the second annular wave shaped support bar 6 is 3 to 2. Alternatively, the first annular corrugated strut 5 comprises 8V-shaped structures 7 and the second annular corrugated strut 6 comprises 12V-shaped structures 7.
Therefore, at the connection position of the first annular waveform support bar 5 and the second annular waveform support bar 6, the peaks or the troughs of the first annular waveform support bar 5 are distributed alternately in a closed loop and an open loop, i.e. an open loop peak or trough is arranged between the peaks or the troughs of the second annular waveform support bar 6 of two adjacent closed loops; two open-loop peaks or troughs are arranged between the peaks or troughs of the second annular waveform supporting rods 6 of two adjacent closed loops.
Optionally, the first annular waveform support bar 5 has 4 closed-loop peaks, 4 open-loop peaks, 4 closed-loop valleys and 4 open-loop valleys; the second annular wave support bar 6 has 4 closed-loop peaks, 8 open-loop peaks, 4 closed-loop valleys and 8 open-loop valleys.
The wave crest or the wave trough of the closed loop annular wave-shaped supporting rod can provide larger supporting force, so that the support is ensured to have enough supporting force, and meanwhile, the supporting force of the support is not overlarge because the support is provided with the wave crest or the wave trough of the open loop; and the open-loop wave crest or wave trough is not connected with other parts of the bracket, so that the bending degree of freedom is larger, and the flexibility of the bracket is ensured.
Through the embodiment, the support has enough supporting force, the supporting force is not excessive, and meanwhile, the flexibility of the support is ensured.
In one embodiment, as shown in fig. 4 and 5, the proximal portion 1 comprises two first annular wave shaped support bars 5 axially juxtaposed; alternatively, as shown in fig. 1 and 2, the proximal portion 1 comprises two second annular wave shaped support bars 6 axially juxtaposed; and/or as shown in fig. 4 and 5, the distal portion 4 comprises two first annular wave-shaped support bars 5 axially juxtaposed; alternatively, as shown in fig. 1 and 2, the distal portion 4 includes two second annular wave support rods 6 axially juxtaposed.
With this embodiment, the proximal portion 1 and the distal portion 4 are advantageously formed in a closed loop design, which effectively avoids the free end from puncturing the vessel wall.
In one embodiment, the proximal portion 1 comprises two first annular wave shaped support bars 5 axially arranged side by side, the first body portion 2 being connected to the proximal portion 1 by means of a second annular wave shaped support bar 6; the proximal part 1 comprises two second annular wavy support rods 6 which are axially distributed in parallel, and the first main body part 2 is connected with the proximal part 1 through the first annular wavy support rods 5; the distal end portion 4 comprises two first annular waveform support rods 5 which are axially distributed in parallel, and the second main body portion 3 is connected with the distal end portion 4 through a second annular waveform support rod 6; the distal end portion 4 comprises two second annular wave shaped support bars 6 arranged axially side by side, the second body portion 3 being connected to the distal end portion 4 by means of a first annular wave shaped support bar 5.
With this embodiment, the formation of a tapered mouth is facilitated by the fewer connection points of the proximal portion 1 to the first body portion 2 and the fewer connection points of the distal portion 4 to the second body portion 3.
In one embodiment, as shown in fig. 3, the connection between the proximal portion 1 and the first body portion 2 forms a tapered opening 12 after the stent is deployed, and the included angle between the generatrix of the tapered opening 12 and the axis is 30 to 60 degrees; the connection of the distal part 4 to the second body part 3 forms a conical mouth 12 after deployment of the stent, the generatrix of the conical mouth 12 being at an angle of 30 to 60 degrees to the axis.
By means of the embodiment, the outward-expansion conical opening 12 is arranged, radial supporting force at two ends of the stent can be improved, and the displacement problem caused by blood flow impact in the stent revascularization can be effectively solved.
In one embodiment, as shown in fig. 1 to 5, a fixing rod 11 is arranged on the first annular wave support rod 5 or the second annular wave support rod 6, which is distant from the proximal end portion 1 of the first body portion 2 or distant from the distal end portion 4 of the second body portion 3; at the distal end portion 4, a fixing rod 11 extends from the first annular wavy strut 5 or the second annular wavy strut 6 at the peak of the Z-shaped waveform; in the proximal end portion 1, the fixing rod 11 extends from the trough of the Z-shaped wave of the first annular wave support rod 5 or the second annular wave support rod 6; the plurality of fixing bars 11 are uniformly distributed in the circumferential direction; the fixing lever 11 is provided with a developing mark 9.
With this embodiment, the distal portion 4 and the proximal portion 1 of the stent can be effectively positioned by the developing mark 9.
In one embodiment, as shown in fig. 1-5, the proximal portion 1 or the distal portion 4 each includes 4 fixation bars 11.
With this embodiment, it is advantageous to have enough development marks 9 that the development marks 9 clearly identify the open state of the proximal and distal portions 1, 4 of the stent after the stent has been fully released.
In one embodiment, the developing indicia 9 is a radio-opaque spring or developing metal ring, and the developing indicia 9 is secured to the support by laser welding or spot-bonding.
In one embodiment, the development mark 9 may also be provided within the groove-like structure 13.
As shown in fig. 9, the fixing lever 11 is provided with a groove-like structure 13, and the developing mark 9 may be provided in the groove-like structure 13.
The fixing portion 10 may be provided with a groove-like structure 13, and the developing mark 9 may be provided in the groove-like structure 13.
With this embodiment, the developing mark 9 can be firmly fixed to the holder, which is advantageous in improving the safety performance of the holder.
In one embodiment, the stent is formed by laser cutting an alloy tube.
Under the condition that the cutting modes of the alloy pipe cutting into the support are the same, the smaller the included angle between the adjacent rods, namely the smaller the apex angle at the top end of the V-shaped structure 7, the smaller the straight warp of the support, the larger the included angle between the adjacent rods, namely the larger the apex angle at the top end of the V-shaped structure 7, the larger the straight warp of the support. The size of the included angle between the adjacent rods can be adjusted through the manners of expanding treatment, heat setting treatment and the like, wherein the heat setting treatment is carried out on the bracket after the expanding treatment, and the diameter of the bracket can be better adjusted through multiple expanding treatments and heat setting treatments.
With this embodiment, the manufacturing of the stent is facilitated.
Example 1
As shown in fig. 1 to 5, the present embodiment provides a stent comprising a proximal end portion 1, a first body portion 2, an intermediate portion 14, a second body portion 3 and a distal end portion 4 connected in this order from the proximal end to the distal end; wherein the proximal end portion 1, the first body portion 2, the intermediate portion 14, the second body portion 3 and the distal end portion 4 are each constituted by a ring-shaped wave-shaped support bar; the first body part 2 and the second body part 3 are composed of a first annular waveform supporting rod 5 and a second annular waveform supporting rod 6 which are alternately arranged, wherein the first annular waveform supporting rod 5 and the second annular waveform supporting rod 6 are Z-shaped waveforms, and each Z-shaped waveform comprises a plurality of V-shaped structures 7; the length of the Z-shaped waveform of the first annular waveform support bar 5 in the axial direction is longer than that of the Z-shaped waveform of the second annular waveform support bar 6 in the axial direction; the intermediate portion 14 is provided with a developing mark 9.
The first annular waveform support bar 5 and the second annular waveform support bar 6 have substantially the same waveform, i.e., the ratio of wavelength to amplitude is constant, but the length of the Z-shaped waveform of the first annular waveform support bar 5 in the axial direction is longer than that of the Z-shaped waveform of the second annular waveform support bar 6, i.e., the first annular waveform support bar 5 has a larger amplitude with respect to the second annular waveform support bar 6, and correspondingly, the first annular waveform support bar 5 has a longer wavelength with respect to the second annular waveform support bar 6.
Optionally, the wavelength ratio of the first annular waveform support bar 5 to the second annular waveform support bar 6 is 3 to 2, that is, the total wavelength of the two V-shaped structures 7 of the first annular waveform support bar 5 is equal to the total wavelength of the 3V-shaped structures 7 of the second annular waveform support bar 6. Alternatively, the first annular corrugated strut 5 includes 8V-shaped structures 7, and the second annular corrugated strut 6 includes 12V-shaped structures 7, and since the wavelength ratio of the first annular corrugated strut 5 to the second annular corrugated strut 6 is 3 to 2, the total length in the circumferential direction and the radial direction of the first annular corrugated strut 5 is equal to the total length in the circumferential direction and the radial direction of the second annular corrugated strut 6, that is, the total wavelength of the first annular corrugated strut 5 is equal to the total wavelength of the second annular corrugated strut 6.
In the axial direction, the number of the annular waveform support rods forming the support is set according to actual needs, and the first main body part and the second main body part can comprise the same number or different numbers of annular waveform support rods; alternatively, as shown in fig. 1, the first body portion 2 and the second body portion 3 of the bracket may each include 6 annular waveform support bars, wherein 3 first annular waveform support bars 5 and 3 second annular waveform support bars 6 are included in the 6 annular waveform support bars.
Alternatively, the cross-sectional dimension of the first annular corrugated strut 5 is larger than the cross-sectional dimension of the second annular corrugated strut 6, i.e. the second annular corrugated strut 6 is finer than the first annular corrugated strut 5.
The first body part 2 and the second body part 3 are composed of the first annular waveform supporting rods 5 and the second annular waveform supporting rods 6 which are alternately arranged, and the axial connection strength and the radial supporting force are ensured to be uniformly distributed along the axial direction and the deformation of the bracket is uniform when the bracket stretches or bends due to the alternate arrangement of the first annular waveform supporting rods 5 and the second annular waveform supporting rods 6; meanwhile, the length of the second annular waveform support rod 6 in the axial direction is smaller, so that the support has higher flexibility, expansibility and overstretching performance compared with the support formed by the first annular waveform support rod 5; in addition, the second annular waveform support rod 6 is finer than the first annular waveform support rod 5, so that the stent is easier to stretch at the second annular waveform support rod 6, and the stent has better expansion performance compared with the stent which is formed by all the first annular waveform support rods 5; the cross-sectional dimension of the first annular wave-shaped supporting rod 5 is larger than the cross-sectional dimension of the second annular wave-shaped supporting rod 6, so that the support has larger radial supporting force at the first annular wave-shaped supporting rod 5, and the radial supporting force of the whole support is larger compared with the support formed by the second annular wave-shaped supporting rods 6.
Meanwhile, the support is simple in structure and easy to implement.
The intermediate portion 14 of the stent is provided with a developing mark 9 to facilitate the determination of the specific position of the intermediate portion 14 of the stent after the stent has been fully released.
By using the support, the length of the Z-shaped waveform of the first annular waveform support rod 5 in the axial direction is larger than that of the Z-shaped waveform of the second annular waveform support rod 6 in the axial direction, so that the support has higher radial supporting force, the flexibility and the expansibility of the support can be greatly enhanced, the overstretching performance of the support is improved, and meanwhile, the support is simple in structure and easy to implement; the intermediate portion 14 is provided with a development mark to facilitate the determination of the specific position of the intermediate portion 14 of the stent after the stent has been fully released.
Example two
In one embodiment, the intermediate portion 14 comprises two first annular wave shaped support bars 5 and part of the V-shaped structure 7 of the intermediate portion 14 is replaced by a Y-shaped structure 8, the Y-shaped structure 8 having a rod-like fixing portion 10 parallel to the axial direction of the support, the fixing portion 10 being provided with a developing mark 9. The rod-like fixing portion 10 of the Y-shaped structure 8 provides a fixing position for the developing mark 9, facilitating the mounting and fixing of the developing mark 9.
The junction of the top end of the V-shaped structure 7 of the first annular wave shaped support bar 5, where the intermediate portion 14 adjoins the first body portion 2, and the top end of the V-shaped structure 7 of the first annular wave shaped support bar 5, where the intermediate portion 14 adjoins the second body portion 3, forms the junction of the intermediate portion 14.
The Y-shaped structures 8 are all open-loop structures, i.e. the rod-shaped fixing portion 10 of the Y-shaped structure 8 of the first annular wave-shaped support rod 5 of the intermediate portion 14 adjoining the first body portion 2 has a free end facing the second body portion 3, and the rod-shaped fixing portion 10 of the Y-shaped structure 8 of the first annular wave-shaped support rod 5 of the intermediate portion 14 adjoining the second body portion 3 has a free end facing the first body portion 2.
Part of the V-shaped structures 7 are open-loop structures, and the rest of the V-shaped structures 7 are closed-loop structures.
When the V-shaped structure 7 of the first annular wavy strut 5 with the middle part 14 adjacent to the first main body part 2 is adjacently arranged with the Y-shaped structure 8 of the first annular wavy strut 5 with the middle part 14 adjacent to the second main body part 3, the V-shaped structure 7 is an open loop structure, i.e. the top end of the V-shaped structure 7 is not connected with other parts of the bracket; when the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 adjacent to the first body portion 2 is arranged adjacent to the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 adjacent to the second body portion 3, the V-shaped structure 7 is a closed loop structure, i.e. the top end of the V-shaped structure 7 is connected to the rest of the stent.
Similarly, when the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 abutting the second body portion 3 is disposed adjacent to the Y-shaped structure 8 of the first annular wave support bar 5 with the intermediate portion 14 abutting the first body portion 2, the V-shaped structure 7 is an open loop structure, i.e., the tip of the V-shaped structure 7 is not connected to the rest of the stent; when the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 adjacent to the second body portion 3 is disposed adjacent to the V-shaped structure 7 of the first annular wave support bar 5 with the intermediate portion 14 adjacent to the first body portion 2, the V-shaped structure 7 is a closed loop structure, i.e. the top end of the V-shaped structure 7 is connected to the rest of the stent.
The closed loop V-shaped structure 7 of the intermediate portion 14 provides sufficient support for the stent; the open-loop V-shaped structure 7 and the open-loop Y-shaped structure 8 can effectively avoid overlarge supporting force, and the flexibility of the bracket is ensured due to the large bending freedom degree.
As shown in fig. 1 to 5, the plurality of Y-shaped structures 8 of the first annular wave-shaped support bar 5, the intermediate portion 14 being adjacent to the first body portion 2, are evenly distributed in the circumferential direction with the free ends of the fixing portions 10 of the Y-shaped structures 8 directed toward the second body portion 3, the plurality of Y-shaped structures 8 of the first annular wave-shaped support bar 5, the intermediate portion 14 being adjacent to the second body portion 3, are evenly distributed in the circumferential direction with the free ends of the fixing portions 10 of the Y-shaped structures 8 directed toward the first body portion 2; the free end of the intermediate portion 14 abutting the fixing portion 10 of the first annular wave support bar 5 of the first body portion 2 is axially spaced from the free end of the intermediate portion 14 abutting the fixing portion 10 of the first annular wave support bar 5 of the second body portion 3.
The free ends of the fixing portions 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the first main body portion 2, and the free ends of the fixing portions 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the second main body portion 3, are axially spaced apart, that is, the length of the Y-shaped structures 8 of the first annular wave support bar 5 in the axial direction is equal to or less than the length of the V-shaped structures 7 of the first annular wave support bar 5 in the axial direction to thereby achieve the spaced apart free ends, it is avoided that the fixing portions 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the first main body portion 2, and the fixing portions 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the second main body portion 3, overlap in the axial direction, so that the developing marks 9 of the first main body portion 2 and the developing marks 9 of the second main body portion 3 do not overlap in the axial direction, so that, in the compressed state, the intermediate portion overall radiopaque length is twice the length of the developing marks 9. And the length is twice, so that the operator can observe better.
More importantly, the free end of the fixing portion 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the first main body portion 2, is axially spaced from the free end of the fixing portion 10 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the second main body portion 3, so that the developing mark 9 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the first main body portion 2, is axially spaced from the developing mark 9 of the first annular wave support bar 5, the intermediate portion 14 of which abuts the second main body portion 3, and when the stent is in a compressed state, the radial volume of the stent can be reduced, and the push resistance can be reduced.
As shown in fig. 1 to 3, the respective Y-shaped structures 8 of the first annular wave support bar 5 whose intermediate portion 14 adjoins the first main body portion 2 are staggered in the circumferential direction with the respective Y-shaped structures 8 of the first annular wave support bar 5 whose intermediate portion 14 adjoins the second main body portion 3; the included angle of the circle centers corresponding to the two adjacent Y-shaped structures 8 is a fixed value, wherein the two adjacent Y-shaped structures 8 respectively belong to the two first annular waveform support rods 5 of the middle part 14.
The staggered Y-shaped structures 8 can reduce pushing resistance. Meanwhile, in the compressed state, since the developing mark 9 of the first annular waveform support bar 5 of which the intermediate portion 14 is adjacent to the first main body portion 2 is not overlapped with the developing mark 9 of the first annular waveform support bar 5 of which the intermediate portion 14 is adjacent to the second main body portion 3 in the axial direction, the length of the overall radiopacity of the intermediate portion is twice that of the developing mark 9, and the length of the two times is beneficial for the operator to observe better. After the stent is opened, the developing mark 9 facilitates the operator to locate the position of the stent.
As shown in fig. 4 and 5, each Y-shaped structure 8 of the first annular wave support bar 5 of the intermediate portion 14 adjacent to the first body portion 2 is arranged collinearly with each Y-shaped structure 8 of the first annular wave support bar 5 of the intermediate portion 14 adjacent to the second body portion 3.
In the compressed state, since the developing mark 9 of the first annular wavy strut 5 of which the intermediate portion 14 adjoins the first main body portion 2 is misaligned with the developing mark 9 of the first annular wavy strut 5 of which the intermediate portion 14 adjoins the second main body portion 3 in the axial direction, the overall radiopaque length of the intermediate portion is twice the length of the developing mark 9, and the length of the doubled length is favorable for the operator to observe better. The co-linear arrangement of the Y-shaped structures 8 facilitates more convenient fixing of the developed indicia 9 and allows the developed indicia 9 to be more easily viewed and positioned.
Alternatively, as shown in fig. 5, two developing marks 9 arranged in line may be formed as a single body.
As shown in fig. 1 to 3, the first annular wave support bar 5, the intermediate portion 14 of which adjoins the first body portion 2, and the first annular wave support bar 5, the intermediate portion 14 of which adjoins the second body portion 3, each comprise two Y-shaped structures 8.
The intermediate portion 14 is disposed 180 degrees apart from the two Y-shaped structures 8 of the first annular wave shaped support bar 5 adjacent to the first body portion 2, and the intermediate portion 14 is disposed 180 degrees apart from the two Y-shaped structures 8 of the first annular wave shaped support bar 5 adjacent to the second body portion 2. The middle part 14 is adjacent to the first annular wave-shaped supporting rod 5 of the first main body part 2, and 3V-shaped structures 7 are arranged between the two Y-shaped structures 8; and 3V-shaped structures 7 are provided between the two Y-shaped structures 8 of the first annular wave shaped support bar 5, the intermediate portion 14 of which adjoins the second body portion 3.
Optionally, each Y-shaped structure 8 of the first annular corrugated strut 5 with the intermediate portion 14 abutting the first main body portion 2 is staggered with respect to each Y-shaped structure 8 of the first annular corrugated strut 5 with the intermediate portion 14 abutting the second main body portion 3, and the included angle between the centers of the corresponding centers of the adjacent Y-shaped structures 8 is 90 degrees, wherein each of the adjacent Y-shaped structures 8 includes a V-shaped structure 7 with the intermediate portion 14 abutting the first annular corrugated strut 5 of the first main body portion 2 and a V-shaped structure 7 with the intermediate portion 14 abutting the first annular corrugated strut 5 of the second main body portion 3, and one V-shaped structure 7 with the intermediate portion 14 abutting the first annular corrugated strut 5 of the first main body portion 2 and one V-shaped structure 7 with the intermediate portion 14 abutting the first annular corrugated strut 5 of the second main body portion 3 are disposed between the adjacent Y-shaped structures 8.
Optionally, each Y-shaped structure 8 of the first annular corrugated supporting rod 5 with the middle portion 14 adjacent to the first main body portion 2 is arranged in a collinear manner with each Y-shaped structure 8 of the first annular corrugated supporting rod 5 with the middle portion 14 adjacent to the second main body portion 3, and the included angle between the centers of circles of the adjacent two Y-shaped structures 8 is 180 degrees.
Alternatively, as shown in fig. 4 and 5, the first annular wave support bar 5 with the intermediate portion 14 abutting the first body portion 2 and the first annular wave support bar 5 with the intermediate portion 14 abutting the second body portion 3 each comprise 4Y-shaped structures 8; each Y-shaped structure 8 of the first annular wave-shaped supporting rod 5 with the middle part 14 adjacent to the first main body part 2 is arranged in a collinear way with each Y-shaped structure 8 of the first annular wave-shaped supporting rod 5 with the middle part 14 adjacent to the second main body part 3, and the included angle of the circle centers corresponding to the two adjacent Y-shaped structures 8 is 90 degrees. Having enough developing marks 9 is beneficial for the developing marks 9 to clearly identify the open state of the middle part of the stent after the stent is completely released.
Example III
The density of the Z-shaped waveform of the first annular waveform support bar 5 in the circumferential direction is smaller than that of the Z-shaped waveform of the second annular waveform support bar 6; the circumferential width of each V-shaped structure 7 of the Z-shaped wave form of the first annular wave form supporting rod 5 is larger than the circumferential width of each V-shaped structure 7 of the Z-shaped wave form of the second annular wave form supporting rod 6.
Alternatively, the ratio of the density of the zigzag waveform of the first annular waveform support bar 5 in the circumferential direction to the density of the zigzag waveform of the second annular waveform support bar 6 in the circumferential direction is 2 to 3. The ratio of the circumferential width of each V-shaped structure 7 of the Z-shaped wave form of the first annular wave form support bar 5 to the circumferential width of each V-shaped structure 7 of the Z-shaped wave form of the second annular wave form support bar 6 is 3 to 2.
As shown in fig. 1 to 5, a connection point is formed between the first annular waveform support bar 5 and the second annular waveform support bar 6, the connection point being located at a point where a trough of the Z-shaped waveform of the first annular waveform support bar 5 meets a crest of the Z-shaped waveform of the second annular waveform support bar 6 and at a point where a crest of the Z-shaped waveform of the first annular waveform support bar 5 meets a trough of the Z-shaped waveform of the second annular waveform support bar 6.
Alternatively, the ratio of the wavelength of the first annular wave shaped support bar 5 to the wavelength of the second annular wave shaped support bar 6 is 3 to 2. Alternatively, the first annular corrugated strut 5 comprises 8V-shaped structures 7 and the second annular corrugated strut 6 comprises 12V-shaped structures 7.
Therefore, at the connection position of the first annular waveform support bar 5 and the second annular waveform support bar 6, the peaks or the troughs of the first annular waveform support bar 5 are distributed alternately in a closed loop and an open loop, i.e. an open loop peak or trough is arranged between the peaks or the troughs of the second annular waveform support bar 6 of two adjacent closed loops; two open-loop peaks or troughs are arranged between the peaks or troughs of the second annular waveform supporting rods 6 of two adjacent closed loops.
Optionally, the first annular waveform support bar 5 has 4 closed-loop peaks, 4 open-loop peaks, 4 closed-loop valleys and 4 open-loop valleys; the second annular wave support bar 6 has 4 closed-loop peaks, 8 open-loop peaks, 4 closed-loop valleys and 8 open-loop valleys.
The wave crest or the wave trough of the closed loop annular wave-shaped supporting rod can provide larger supporting force, so that the support is ensured to have enough supporting force, and meanwhile, the supporting force of the support is not overlarge because the support is provided with the wave crest or the wave trough of the open loop; and the open-loop wave crest or wave trough is not connected with other parts of the bracket, so that the bending degree of freedom is larger, and the flexibility of the bracket is ensured.
Example IV
As shown in fig. 4 and 5, the proximal portion 1 comprises two first annular wave-shaped support bars 5 axially juxtaposed; alternatively, as shown in fig. 1 and 2, the proximal portion 1 comprises two second annular wave shaped support bars 6 axially juxtaposed; and/or as shown in fig. 4 and 5, the distal portion 4 comprises two first annular wave-shaped support bars 5 axially juxtaposed; alternatively, as shown in fig. 1 and 2, the distal portion 4 comprises two second annular wave shaped support bars 6 axially juxtaposed; thereby facilitating the formation of a closed loop design of the proximal portion 1 and the distal portion 4, which effectively avoids free ends from puncturing the vessel wall.
The proximal part 1 comprises two first annular wavy support rods 5 which are axially distributed in parallel, and the first main body part 2 is connected with the proximal part 1 through a second annular wavy support rod 6; the proximal part 1 comprises two second annular wavy support rods 6 which are axially distributed in parallel, and the first main body part 2 is connected with the proximal part 1 through the first annular wavy support rods 5; the distal end portion 4 comprises two first annular waveform support rods 5 which are axially distributed in parallel, and the second main body portion 3 is connected with the distal end portion 4 through a second annular waveform support rod 6; the distal end portion 4 comprises two second annular wave shaped support bars 6 arranged axially side by side, the second body portion 3 being connected to the distal end portion 4 by means of a first annular wave shaped support bar 5. The formation of a tapered mouth is facilitated by the fewer connection points of the proximal portion 1 to the first body portion 2 and the fewer connection points of the distal portion 4 to the second body portion 3.
As shown in fig. 3, the connection between the proximal end part 1 and the first main body part 2 forms a conical opening 12 after the stent is unfolded, and the included angle between the generatrix of the conical opening 12 and the axis is 30-60 degrees; the connection of the distal part 4 to the second body part 3 forms a conical mouth 12 after deployment of the stent, the generatrix of the conical mouth 12 being at an angle of 30 to 60 degrees to the axis. The outward expansion conical opening 12 is arranged, so that the radial supporting force at two ends of the bracket can be improved, and the displacement problem caused by blood flow impact in the revascularization of the bracket can be effectively solved.
As shown in fig. 1 to 5, a fixing rod 11 is arranged on the first annular wavy strut 5 or the second annular wavy strut 6 which is distant from the proximal end portion 1 of the first main body portion 2 or the distal end portion 4 of the second main body portion 3; at the distal end portion 4, a fixing rod 11 extends from the first annular wavy strut 5 or the second annular wavy strut 6 at the peak of the Z-shaped waveform; in the proximal end portion 1, the fixing rod 11 extends from the trough of the Z-shaped wave of the first annular wave support rod 5 or the second annular wave support rod 6; the plurality of fixing bars 11 are uniformly distributed in the circumferential direction; the fixing bar 11 is provided with a developing mark 9 so that the distal end portion 4 and the proximal end portion 1 of the stent can be effectively positioned by the developing mark 9.
In one embodiment, as shown in fig. 1-5, the proximal portion 1 or the distal portion 4 each includes 4 fixation bars 11. Having enough of the development marks 9 facilitates that the development marks 9 clearly identify the open state of the proximal and distal portions 1, 4 of the stent after the stent has been fully released.
DAS mode
As shown in fig. 6, in the DAS path mode, the 4 developing marks 9 in the middle of the stent are positioned at the tumor diameter opening, so that the relative position of the stent is kept unchanged, the stent is released in situ, and the positioning of the stent by an operator is greatly facilitated. As shown in fig. 7, after the stent is completely released in the DAS contrast mode, the 4 developing marks 9 in the middle clearly identify the open state of the stent. As shown in fig. 8, the stent was excellent in adhesion property at a bending radius of 4 mm.
The embodiments of the present invention are not limited to the examples described above, and those skilled in the art can make various changes and modifications in form and detail without departing from the spirit and scope of the present invention, which are considered to fall within the scope of the present invention.

Claims (13)

1. A stent comprising a proximal portion, a first body portion, a middle portion, a second body portion and a distal portion connected in sequence from a proximal end to a distal end; wherein the proximal portion, the first body portion, the intermediate portion, the second body portion, and the distal portion are each comprised of a ring-shaped wave support bar; the first body part and the second body part are respectively composed of a first annular waveform supporting rod and a second annular waveform supporting rod which are alternately arranged, the first annular waveform supporting rod and the second annular waveform supporting rod are Z-shaped waveforms, and each Z-shaped waveform comprises a plurality of V-shaped structures; the length of the Z-shaped waveform of the first annular waveform supporting rod in the axial direction is larger than that of the Z-shaped waveform of the second annular waveform supporting rod in the axial direction; the middle part is provided with a developing mark;
The middle part comprises two first annular waveform support rods, part of the V-shaped structure of the middle part is replaced by a Y-shaped structure, the Y-shaped structure is provided with a rod-shaped fixing part parallel to the axial direction of the support, and the fixing part is provided with a developing mark;
the length of the Y-shaped structure of the first annular waveform supporting rod of the middle part in the axial direction is smaller than or equal to the length of the V-shaped structure of the first annular waveform supporting rod of the middle part in the axial direction.
2. The stent of claim 1, wherein the junction of the apex of the V-shaped structure of the first annular wave support bar where the intermediate portion abuts the first body portion and the apex of the V-shaped structure of the first annular wave support bar where the intermediate portion abuts the second body portion forms the junction of the intermediate portion.
3. The stent of claim 2, wherein the plurality of Y-shaped structures of the first annular wave shaped support bar with the intermediate portion abutting the first body portion are evenly distributed circumferentially and the free ends of the securing portions of the Y-shaped structures are directed toward the second body portion, and the plurality of Y-shaped structures of the first annular wave shaped support bar with the intermediate portion abutting the second body portion are evenly distributed circumferentially and the free ends of the securing portions of the Y-shaped structures are directed toward the first body portion.
4. A stent as in claim 3 wherein each of said Y-shaped structures of said first annular wave support bar adjacent said first body portion at said intermediate portion is staggered circumferentially from each of said Y-shaped structures of said first annular wave support bar adjacent said second body portion at said intermediate portion; the included angle of the circle centers corresponding to the adjacent two Y-shaped structures is a fixed value.
5. A stent as in claim 3 wherein each of said Y-shaped structures of the first annular wave support bar adjacent said first body portion at said intermediate portion is disposed co-linearly with each of said Y-shaped structures of the first annular wave support bar adjacent said second body portion at said intermediate portion.
6. The stent of claim 4 or 5, wherein the first annular wave support bar of the intermediate portion adjacent the first body portion and the first annular wave support bar of the intermediate portion adjacent the second body portion each comprise two of the Y-shaped structures.
7. The stent of claim 1, wherein the density of the Z-shaped wave forms of the first annular wave form support bar in the circumferential direction is less than the density of the Z-shaped wave forms of the second annular wave form support bar in the circumferential direction.
8. The stent of claim 1, wherein a connection point is formed between the first annular wave support bar and the second annular wave support bar, the connection point being located where a trough of the Z-shaped wave of the first annular wave support bar meets a peak of the Z-shaped wave of the second annular wave support bar and where a peak of the Z-shaped wave of the first annular wave support bar meets a trough of the Z-shaped wave of the second annular wave support bar.
9. The stent of claim 1, wherein the proximal portion comprises two of the first annular wave shaped struts axially side by side or the proximal portion comprises two of the second annular wave shaped struts axially side by side; and/or the distal end portion comprises two first annular waveform support bars axially arranged in parallel, or the distal end portion comprises two second annular waveform support bars axially arranged in parallel.
10. The stent of claim 9, wherein the proximal portion comprises two of the first annular corrugated struts axially side-by-side, the first body portion being connected to the proximal portion by a second annular corrugated strut; the proximal end part comprises two second annular waveform support rods which are axially distributed in parallel, and the first main body part is connected with the proximal end part through the first annular waveform support rods; the distal end part comprises two first annular waveform support rods which are axially distributed in parallel, and the second main body part is connected with the distal end part through the second annular waveform support rods; the distal end portion comprises two second annular waveform support rods which are axially distributed in parallel, and the second main body portion is connected with the distal end portion through the first annular waveform support rods.
11. The stent of claim 10, wherein the junction of the proximal portion and the first body portion forms a tapered mouth when the stent is deployed, the tapered mouth having a generatrix at an angle of 30 to 60 degrees from the axis;
the connection part of the distal end part and the second main body part forms a conical opening after the bracket is unfolded, and the included angle between the generatrix of the conical opening and the axis is 30-60 degrees.
12. The stent of any one of claims 9 to 11, wherein a fixed rod is disposed on the first or second annular corrugated support rod distal to the proximal portion of the first body portion or distal to the distal portion of the second body portion; at the distal end portion, the fixation rod extends from a peak of a Z-waveform of the first annular waveform support rod or the second annular waveform support rod; at the proximal end portion, the fixation rod extends from the trough of the Z-shaped wave of the first or second annular wave support rod; the fixing rods are uniformly distributed along the circumferential direction; the fixing rod is provided with a developing mark.
13. The stent of claim 12, wherein the proximal portion or the distal portion each comprises four of the fixation bars.
CN202310679147.7A 2022-05-06 2022-05-06 Support frame Pending CN116672021A (en)

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US20110004292A1 (en) * 2009-07-02 2011-01-06 Tryton Medical, Inc. Ostium support for treating vascular bifurcations
CN102813566A (en) * 2012-04-24 2012-12-12 冯海全 Coronary stent
CN204106265U (en) * 2014-08-12 2015-01-21 孙燕 A kind of semi open model intravascular stent
US20190021889A1 (en) * 2017-07-19 2019-01-24 Abbott Cardiovascular Systems Inc. Intravascular stent
CN110269730A (en) * 2019-07-22 2019-09-24 珠海通桥医疗科技有限公司 Intravascular stent
CN110721012A (en) * 2018-07-16 2020-01-24 杭州唯强医疗科技有限公司 Marking support for subsection

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110004292A1 (en) * 2009-07-02 2011-01-06 Tryton Medical, Inc. Ostium support for treating vascular bifurcations
CN102813566A (en) * 2012-04-24 2012-12-12 冯海全 Coronary stent
CN204106265U (en) * 2014-08-12 2015-01-21 孙燕 A kind of semi open model intravascular stent
US20190021889A1 (en) * 2017-07-19 2019-01-24 Abbott Cardiovascular Systems Inc. Intravascular stent
CN110721012A (en) * 2018-07-16 2020-01-24 杭州唯强医疗科技有限公司 Marking support for subsection
CN110269730A (en) * 2019-07-22 2019-09-24 珠海通桥医疗科技有限公司 Intravascular stent

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