CN-224220300-U - Ilium vein stent

CN224220300UCN 224220300 UCN224220300 UCN 224220300UCN-224220300-U

Abstract

The utility model discloses an iliac vein stent, which comprises a plurality of braided wires, wherein the braided wires comprise an integrated main body part, a first braided part and a second braided part, the main body part extends along the axial direction, the first braided part and the second braided part are respectively connected at two ends of the main body part relative to the axial direction, the first braided part and the second braided part extend in opposite directions until the ends of the first braided part and the second braided part, which are far away from the main body part, are connected to form connection points, and all the connection points are sequentially arranged along the axial direction. According to the utility model, the connecting points are sequentially arranged along the axial direction, so that the whole stent has better structural integrity, and the adhesion performance and the supporting capacity of the whole iliac vein stent are improved.

Inventors

GAO YANBIN
Teng Chuyao
ZHANG JINMING

Assignees

上海善迪医疗科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250206

Claims (10)

1. An iliac vein stent, characterized in that the iliac vein stent extends along an axial direction (X), one end of the iliac vein stent with respect to the axial direction (X) is a proximal end, the other end is a distal end, the iliac vein stent comprising: The plurality of knitting wires comprise an integrated main body part, a first knitting part and a second knitting part, wherein the main body part extends along the axial direction (X), and the first knitting part and the second knitting part are respectively connected at two ends of the main body part relative to the axial direction (X); wherein all the connection points are sequentially arranged along the axial (X) direction.
2. The iliac vein stent of claim 1 further including a central section disposed centrally between said proximal end and said distal end, said connection point being disposed proximate said central section.
3. The iliac vein stent of claim 1 or 2, wherein an end of said first braided portion distal from said main body portion has a first end face and an end of said second braided portion distal from said main body portion has a second end face, said first and second end faces being parallel.
4. The iliac vein stent of claim 3 wherein said first braid and said second braid are welded together by said first end face and said second end face.
5. The iliac vein stent of claim 1 or 2, wherein said main body portion, said first braided portion, and said second braided portion extend helically in said axial (X) direction, and a helical reverse of said first braided portion and said second braided portion is opposite to a helical direction of said main body portion.
6. The iliac vein stent of claim 5 wherein said main body portion, said first braided portion, and said second braided portion are braided to form a plurality of mesh openings, said mesh openings including a first mesh opening disposed proximate a proximal end of said iliac vein stent and a second mesh opening disposed proximate a distal end of said iliac vein stent, said first mesh opening having a diameter less than a diameter of said second mesh opening.
7. The iliac vein stent of claim 6 wherein said first mesh is quadrilateral in shape and said acute angle of said first mesh is +.m, wherein +.m is 75+≤m is ltoreq.80 °; The shape of the second mesh is quadrilateral, and the acute angle of the second mesh is less than N, wherein the angle N is more than or equal to 88 degrees and less than or equal to 90 degrees.
8. The iliac vein stent of claim 1, wherein said iliac vein stent comprises a proximal section, a variable diameter section and a distal section sequentially arranged in an axial (X) direction, wherein diameters of said proximal section and said distal section are uniform, and wherein a radial cross section of said variable diameter section is gradually reduced in said axial (X) direction.
9. The iliac vein stent of claim 8 wherein said proximal section has a diameter of φ 1, wherein φ 1 is 10mm or less and φ 1 is 40mm or less, and said iliac vein stent has a diameter of φ 2 in the distal section, wherein φ 2 is 2mm or less and φ 2 is 4mm or less.
10. The iliac vein stent of claim 8 wherein said iliac vein stent has a length L1 in an axial (X) direction wherein 14mm ∈l1 ∈70mm and said diameter-changing section has a length L2 in an axial (X) direction wherein 2mm ∈l2 ∈10mm.

Description

Ilium vein stent Technical Field The utility model relates to the field of interventional medical instruments, in particular to an iliac vein stent. Background The iliac vein stenosis can be classified into an asymptomatic stage, a venous insufficiency stage and a deep venous thrombosis stage of lower limbs according to the evolution process of the disease. The asymptomatic phase and the venous insufficiency phase are called non-thrombotic iliac vein lesions, the deep venous thrombosis phase of the lower limb evolves into thrombotic iliac vein lesions, and the two are different phases in the evolution process of the iliac vein stenosis diseases, and the iliac vein stent implantation is an effective means for treating the iliac vein compression or stenosis. The existing iliac vein stent is mainly divided into a woven stent and a laser engraving stent. The woven stent is divided into an open loop woven stent and a closed loop woven stent. The closed-loop braided stent is formed by braiding a plurality of alloy wires, and has very good compliance compared with an open-loop braided iliac vein stent, and meanwhile, the problem of stent fracture caused by poor compliance of a laser engraving type stent is avoided. However, the existing closed loop woven stent has the problems of easy retraction, collapse and the like due to insufficient adherence performance and supporting performance. Disclosure of utility model The embodiment of the utility model provides an iliac vein stent, which is used for improving the adherence performance and the supporting capacity of the iliac vein stent by arranging the knitting wire connecting points of closed loop knitting along the axial direction of the iliac vein stent in sequence. In order to solve the technical problems, the embodiment of the utility model discloses the following technical scheme: There is provided an iliac vein stent extending in an axial direction, the iliac vein stent having a proximal end with respect to one end of the axial direction and a distal end with respect to the other end, the iliac vein stent comprising: The plurality of knitting wires comprise an integrated main body part, a first knitting part and a second knitting part, wherein the main body part extends along the axial direction, and the first knitting part and the second knitting part are respectively connected at two ends of the main body part relative to the axial direction; Wherein all the connection points are sequentially arranged along the axial direction. In addition to or in lieu of one or more of the features disclosed above, the iliac vein stent further includes a central segment disposed centrally between the proximal end and the distal end, the connection point being disposed proximate the central segment. In addition to or in lieu of one or more of the features disclosed above, the end of the first woven portion remote from the main body portion has a first end face and the end of the second woven fabric remote from the main body portion has a second end face, the first and second end faces being parallel. In addition to or in lieu of one or more of the features disclosed above, the first and second braided portions are welded together by the first and second end faces. In addition to or in lieu of one or more of the features disclosed above, the body portion, the first braid and the second braid extend helically in the axial direction, the helical opposition of the first braid and the second braid being opposite the helical direction of the body portion. In addition to or in lieu of one or more of the features disclosed above, the body portion, the first braided portion, and the second braided portion are braided to form a plurality of mesh openings, the mesh openings including a first mesh opening disposed at a proximal end of the iliac vein stent and a second mesh opening disposed at a distal end of the iliac vein stent, the first mesh opening having a diameter less than a diameter of the second mesh opening. In addition to or in lieu of one or more of the features disclosed above, the first mesh is quadrilateral in shape, the acute angle of the first mesh being +.M, wherein 75+.M+≤80 °; The shape of the second mesh is quadrilateral, and the acute angle of the second mesh is less than N, wherein the angle N is more than or equal to 88 degrees and less than or equal to 90 degrees. In addition to or in lieu of one or more of the features disclosed above, the iliac vein stent includes a proximal segment, a variable diameter segment, and a distal segment disposed sequentially in an axial direction, the proximal segment and the distal segment having uniform diameters, the radial cross-section of the variable diameter segment gradually decreasing in the axial direction. In addition to or in lieu of one or more of the features disclosed above, the proximal segment has a diameter of φ 1, wherein 10mm ε 1 ε 40mm; The diameter of the iliac vein stent at the telecentric section is phi 2,