CN209734243U - Radial supporting force adjustable braiding support - Google Patents

Abstract

the utility model discloses a braided stent with adjustable radial supporting force, which is characterized by comprising a stent main body, wherein the stent main body is of a cylindrical net structure, and the diameters of two ends of the stent main body are the same or different; the cross section of at least one department in both ends and the middle part of support main part is equipped with the barb of equipartition, is equipped with a plurality of barbs of arranging along support main part axial on every barb. The utility model has one or more sections of adjustable radial supporting force, which is suitable for the comprehensive requirements of different pathological changes on compliance and stability; the stent main body has better compliance and better delivery performance.

Description

radial supporting force adjustable braiding support

Technical Field

The utility model relates to a support is woven to radial holding power adjustable.

Background

stents used in the prior art endoluminal treatment of arteries or veins generally do not have the ability to adjust radial support forces.

For the self-expanding stent, the radial supporting force is related to the in-vitro preformed shape, namely the radial supporting performance is determined when the device leaves a factory, the supporting performance cannot be adjusted in clinical trial, doctors often try to use a plurality of devices aiming at a single disease and select proper specifications, so that the consumption number of medical devices is increased, and the training cost and the operation time of the doctors are increased.

For the balloon-expandable stent, the radial supporting force is determined by the filling condition of the balloon, and the two ends of the stent with the radial supporting performance are often weaker than the middle section of the stent. The main purpose of endovascular treatment is to support a stenotic vessel segment, restoring the vessel its function of delivering blood, the support property being one of the most important properties of a stent. Meanwhile, the condition that a part of the blood vessel section needs strong supporting performance and the adjacent section needs weak supporting performance is clinically encountered, and the conventional stent cannot be used.

disclosure of Invention

The utility model discloses the problem that will solve is: how to realize the supporting performance with different strengths on the same braided stent at the same time.

in order to solve the problems, the utility model provides a braided stent with adjustable radial supporting force, which is characterized by comprising a stent main body, wherein the stent main body is a cylindrical net structure, and the diameters of two ends of the stent main body are the same or different; the cross section of at least one department in both ends and the middle part of support main part is equipped with the barb of equipartition, is equipped with a plurality of barbs of arranging along support main part axial on every barb.

preferably, the barb quantity of support main part one end is 3 ~ 9, and the barb quantity on every barb is 2 ~ 6.

Preferably, a net structure is arranged between the barbs at the same end part of the bracket main body.

Preferably, the length of the barb is 2-10 mm, and the included angle between the barb and the central shaft of the bracket main body is 0-15 degrees; the included angle between barb and barb is 0 ~ 30.

The reason that the braided stent can be changed from bundle-like to tubular is that the diamond-shaped lattice formed between the stent filaments can be changed. When the grid is elongated along the axial direction of the stent, the braided stent is changed into a strip shape from a tubular shape; when the grid is shortened along the axial direction of the stent, the braided stent is changed into a tubular shape from a bundle strip shape. Namely, the axial deformation capacity of the grid along the stent determines the delivery performance of the stent and the supporting performance of the stent reaching a lesion position in the clinical intervention process.

The utility model discloses a support is woven in the ability that prolongs support axial and shorten to the artificial reinforcing of mode of couple to improve its radial holding power. Compared with the prior art, the beneficial effects of the utility model reside in that:

1. The bracket has one or more sections of adjustable radial supporting force, so that the bracket can adapt to the comprehensive requirements of different pathological changes on compliance and stability;

2. The stent main body has better compliance and better delivery performance.

drawings

Fig. 1 is a front view of a braided stent with adjustable radial supporting force provided in example 1;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a front view of the barb;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a front view of the radial support force adjustable braided stent provided in example 2;

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a front view of the radial support force adjustable braided stent provided in example 3;

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a front view of the radial support force adjustable braided stent provided in example 4;

FIG. 10 is a side view of FIG. 9;

FIG. 11 is a front view of the adjustable radial support force braided stent of example 5;

FIG. 12 is a side view of FIG. 11;

FIG. 13 is a front view of the radial support force adjustable braided stent provided in example 6;

FIG. 14 is a side view of FIG. 13;

FIG. 15 is a front view of the adjustable radial support force braided stent of example 7;

FIG. 16 is a side view of FIG. 15;

FIG. 17 is a front view of the adjustable radial support force braided stent of example 8;

FIG. 18 is a side view of FIG. 17;

FIG. 19 is a front view of the adjustable radial support force braided stent of example 9;

FIG. 20 is a side view of FIG. 19;

FIG. 21 is a front view of the adjustable radial support force braided stent of example 10;

FIG. 22 is a side view of FIG. 21;

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

example 1

as shown in fig. 1-4, the braided stent with adjustable radial supporting force provided for this embodiment includes a stent main body 1, where the stent main body 1 is a cylindrical mesh structure, and the diameters of both ends of the stent main body are the same. The right-hand member of support main part 1 is equipped with four barbs 2 of equipartition, is equipped with 3 barbs 3 of arranging along support main part 1 axial on every barb 2. The length of the barb 2 is 2mm, and the included angle alpha between the barb and the central shaft of the bracket main body 1 is 5 degrees; the angle beta between barb 3 and barb 2 is 15 deg..

In the process of releasing the stent, the stent can be used as a delivery distal end, one end of the stent provided with the barb 2 is released first, and then the stent is pushed forwards, so that the barb 2 is hooked on the reticular structure. When the number of grids hung on the barb 2 is more, that is, the grids are more in the length range of the barb 2, the axial deformation capacity of the grids in the barb 2 along the stent is poorer, and the corresponding radial supporting force of the section of the stent is stronger. When the radial supporting force reaches the clinical preset, the rest of the stent main body 1 is released. At this time, the barb end of the stent plays a role in anchoring, and the stent is prevented from moving.

During the releasing process of the stent, the stent main body can be released firstly, and finally, the end of the stent at the delivery proximal end, which is provided with the barb 2, is released. After the main body 1 of the bracket is completely released, the barb end of the bracket is pushed forwards, so that the barb 2 catches on the grid. As the barb end of the stent is pushed forward, the barbs 2 can catch more and more meshes. When the number of grids hung on the barb 2 is larger, namely the number of grids in the length range of the barb 2 is larger, the axial deformation capacity of the grids in the barb along the stent is poorer, and the corresponding radial supporting force of the section of the stent is stronger. At the moment, the barb end of the bracket plays a role in anchoring, and the stable effect of the bracket main body is further ensured.

Example 2

as shown in fig. 5 and 6, the present embodiment is different from embodiment 1 in that a net structure is provided between the barbs 2 at the right end of the stent body 1.

example 3

as shown in fig. 7 and 8, the present embodiment is different from embodiment 1 in that the left end of the stent main body 1 is also provided with four barbs 2 as the right end.

at this moment, radial support performance can all be adjusted at the support both ends to realize the stable effect of support. Meanwhile, the length of the support is determined by the barb parts at the two ends of the support, the grid deformability of the support main body 1 is restrained, and the radial support performance of the support main body 1 can be changed by adjusting the distance between the barbs 2 at the two ends of the support.

Example 4

As shown in fig. 9 and 10, the present embodiment is different from embodiment 2 in that the left end of the stent main body 1 is also provided with four barbs 2 as the right end.

example 5

As shown in fig. 11 and 12, the present embodiment is different from embodiment 1 in that the right end of the stent body 1 has no barb, and four barbs 2 connected in a ring shape are provided on two cross sections of the middle section of the stent body 1. At this time, the radial support performance of the middle section of the bracket can be adjusted. The stent has 3 sections of regions with different radial supporting forces, which is beneficial to the treatment in a specific vascular cavity.

Example 6

as shown in fig. 13 and 14, the present embodiment is different from embodiment 5 in that a mesh structure is provided between the barbs 2 on the same section of the stent body 1.

Because the radial supporting force of the design of the stent is determined by the barb part, the wire diameter of the stent can be selected to be thin, and at the moment, when the stent is conveyed in a sheath tube in a bundle shape, the friction force is minimum, and the conveying performance is good; meanwhile, the degree of the stent made of the filaments is better in the aspect of the degree of fit and adaptability with blood vessels.

Example 7

As shown in fig. 15 and 16, the present embodiment is different from embodiment 1 in that the diameter of the left end of the stent body 1 is smaller than that of the right end. The stent main body 1 is made into a stent with a variable diameter, and can adapt to the blood vessel recanalization requirement of the variable diameter in the cavity.

Example 8

As shown in fig. 17 and 18, the present embodiment is different from embodiment 7 in that a mesh structure is provided between the barbs 2 on the same section of the stent body 1.

Example 9

as shown in fig. 19 and 20, the present embodiment is different from embodiment 1 in that the diameter of the left end of the stent body 1 is larger than that of the right end.

example 10

As shown in fig. 21 and 22, the present embodiment is different from embodiment 9 in that a mesh structure is provided between the barbs 2 on the same cross section of the stent body 1.

Claims (4)

1. The braided stent with the adjustable radial supporting force is characterized by comprising a stent main body (1), wherein the stent main body (1) is of a cylindrical net-shaped structure, and the diameters of two ends of the stent main body are the same or different; barbs (2) are uniformly distributed on the cross section of at least one of the two ends and the middle part of the support main body (1), and a plurality of barbs (3) are arranged along the axial direction of the support main body (1) on each barb (2).

2. The braided stent with adjustable radial supporting force as claimed in claim 1, wherein the number of the barbs (2) at one end of the stent main body (1) is 3-9, and the number of the barbs (3) on each barb (2) is 2-6.

3. The braided stent with adjustable radial supporting force as claimed in claim 1, wherein a net structure is arranged between the barbs (2) at the same end part of the stent main body (1).

4. the braided stent with adjustable radial supporting force as claimed in claim 1, wherein the length of the barb (2) is 2-10 mm, and the included angle (alpha) between the barb and the central axis of the stent main body (1) is 0-15 degrees; the included angle (beta) between the barb (3) and the barb (2) is 0-30 degrees.