Occluder and occluding system

Patent metadata

Field	Value
Publication number	US-12564394-B2
Application number	US-202218724267-A
Country	US
Kind code	B2
Filing date	Oct 20, 2022
Priority date	Dec 30, 2021
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

The present invention is applicable to the technical field of interventional medical devices and provides an occluder and an occluding system having the occluder. The occluder includes a woven main body, where the woven main body is formed by shaping a woven mesh tube formed by weaving woven wires having a shape memory function. The woven main body is provided with a shrinkage deformation resistance reduction structure that reduces a resistance of the woven main body entering a pipe; the shrinkage deformation resistance reduction structure reduces the resistance of the woven main body entering the pipe by reducing the contact area between the woven main body and an inner wall of the pipe during radial shrinkage deformation of the woven main body entering the pipe so that the occluder may smoothly and successfully enter a pipe of a delivery sheath, thereby greatly reducing the operation difficulty and risk caused by unsmooth entry of the occluder into the delivery sheath.

First claim

The invention claimed is:

1 . An occluder, comprising:
a woven main body, wherein the woven main body is formed by shaping a woven mesh tube formed by weaving woven wires having a shape memory function; the woven main body is provided with a shrinkage deformation resistance reduction structure that reduces a resistance of the woven main body entering a sheath; the shrinkage deformation resistance reduction structure reduces the resistance of the woven main body entering the sheath by reducing the contact area between the woven main body and an inner wall of the sheath during radial shrinkage deformation of the woven main body entering the sheath.

2 . The occluder according to claim 1 , wherein the shrinkage deformation resistance reduction structure comprises a recess provided on the woven main body, and the recess is recessed toward an inner side of the woven main body.

3 . The occluder according to claim 2 , wherein at least one recess is provided, and the recess penetrates a proximal end and a distal end of the woven main body.

4 . The occluder according to claim 3 , wherein the recesses are distributed along a side wall of the woven mesh tube in a spiral trajectory.

5 . The occluder according to claim 3 , wherein a plurality of recesses is provided, each of the recesses penetrates the woven mesh tube along an axial direction, and the plurality of recesses are asymmetrically provided on a side wall of the woven mesh tube.

6 . The occluder according to claim 2 , wherein the woven main body comprises a distal disc and a shrinkage portion connected to the distal disc, and the radial cross-sectional dimension of the shrinkage portion is smaller than the radial cross-sectional dimension of the distal disc; the recess is close to a transitional connection of the distal disc and the shrinkage portion;
or, the recess is provided at the transitional connection of the distal disc and the shrinkage portion.

7 . The occluder according to claim 2 , wherein the woven main body comprises a proximal disc at a proximal end and a proximal bolt head provided at a proximal end of the proximal disc; the recess is provided between the proximal bolt head and a disc surface of the proximal disc.

8 . The occluder according to claim 2 , wherein the woven main body comprises a distal disc, a proximal disc, and a waist portion connected between the proximal disc and the distal disc; disc surface dimensions of the distal disc and the proximal disc are greater than the radial cross-sectional dimension of the waist portion; a plurality of recesses are provided, and the plurality of recesses are distributed on the woven main body at intervals and have different depths; the depth of the recess on the proximal disc close to the longitudinal central axis of the proximal disc is less than the depth of the recess away from the longitudinal central axis of the proximal disc, and the depth of the recess on the distal disc close to the longitudinal central axis of the distal disc is less than the depth of the recess away from the longitudinal central axis of the distal disc.

9 . The occluder according to claim 2 , wherein an even number of the recesses are provided, and the even number of the recesses are provided in pairs on a side wall of the woven mesh tube; any pair of the recesses are provided symmetrically about the central axis of the woven mesh tube.

10 . The occluder according to claim 2 , wherein a plurality of recesses is provided, and the plurality of recesses is distributed on the woven mesh tube at intervals in a mesh point shape.

11 . The occluder according to claim 1 , wherein the occluder is of a single-layer structure without a flow blocking membrane structure.

12 . The occluder according to claim 11 , wherein the occluder is delivered through a sheath with an inner diameter of less than 6F.

13 . An occluding system, comprising an occluder according to claim 1 and a delivery sheath configured to deliver the occluder.

Assignees

• Lifetech Scient Shenzhen Co

Inventors

• Chen Xianmiao
• Lei Xiaoyue
• Zhao Dongyang

Classifications

• A61B2017/00867

  shape memory effect · CPC title

• A61B2017/00862

  elastic or resilient · CPC title

• A61B2017/00623

  Introducing or retrieving devices therefor · CPC title

• A61B2017/00606

  Implements H-shaped in cross-section, i.e. with occluders on both sides of the opening · CPC title

• A61B2017/00592

  Elastic or resilient implements · CPC title