CN212261624U

CN212261624U - Woven support reinforcement

Info

Publication number: CN212261624U
Application number: CN202020121882.8U
Authority: CN
Inventors: 王盛强; 周艺; 葛思茗
Original assignee: Shanghai Ensheng Medical Technology Co ltd
Current assignee: Shanghai Ensheng Medical Technology Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2021-01-01
Anticipated expiration: 2030-01-19

Abstract

The utility model relates to the technical field of medical equipment, concretely relates to woven support reinforcement, reinforcement set up in woven support both sides, constitute by the latticed structure that interlocks each other, and being close to woven support one side of latticed structure is equipped with the lantern ring, and the lantern ring is connected with woven support, is fixed in woven support side with reinforcement. This technical scheme plays the effect that the restriction was woven the body radius and is changed through increasing the reinforcer at weaving type support both ends, strengthens weaving type support's support performance. In the process of entering the inferior vena cava, the braided stent does not need to be lengthened, and the complexity of the intracavity surgery is reduced. In the use process, the two ends of the woven stent also have good fixity, and the situation that the stent is shortened or even displaced in a blood vessel is avoided.

Description

Woven support reinforcement

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to woven support reinforcement body.

Background

Venous reflux disorder caused by iliac vein occlusion or stenosis, and chronic and difficult-to-recover diseases such as venous insufficiency of lower limb, varicose veins, edema of lower limb and the like caused by venous hypertension are called iliac vein compression syndrome or iliac vein thrombosis syndrome. The syndrome is not single in manifestation, and meanwhile, iliac femoral vein thrombosis can be caused to cause varicocele of spermatic cord of the male to influence the normal fertility of the male, so that the patency of the iliac vein is a very key index for clinical treatment.

At present, related medical measures comprise traditional open surgery and intracavity surgery, however, the open surgery has unstable factors such as large trauma and poor curative effect, so that the treatment measures are rarely adopted clinically, and venous thrombosis is easy to occur in target blood vessels after the open surgery. The intracavity operation is the ideal main treatment mode for treating the iliac vein occlusion at present, and the metal venous stent is placed at the iliac vein stenosis part through the interventional therapy mode, and can be implanted after sacculus expansion if necessary.

Although the clinical outcome of endoluminal procedures is much better than open procedures, there are still some drawbacks to this procedure due to the properties of the stent itself. The currently clinically applicable iliac vein stent mainly has the following two structures: (1) the cutting type metal support is formed by laser engraving. (2) The metal braided stent is braided by filiform metal. The cutting type stent can be accurately positioned and placed in a diseased common iliac vein and has excellent supporting performance, however, for long-section iliac vein diseases, thrombus is easily formed in the stent by using the long-section cutting type stent, and the flexibility of the cutting type stent is not good, so that the whole iliac vein cannot be spanned in a long section. The cutting stent has a fixed radius, and the whole stent shows better rigid mechanical properties than the woven stent after the processes of heat treatment and the like, however, the flexibility of the cutting stent is far inferior to that of the woven stent, so that diseases such as thrombus in the stent, pain of a patient and the like are easily induced, and when the condition that the iliac vein is diseased faces to the long-section iliac vein, the cutting stent is difficult to implant and attach to the blood vessel because the iliac vein is similar to an S shape.

The metal woven stent has good flexibility and an ideal fitted diseased blood vessel, however, the length of the woven structure cannot be shortened easily as the former is fixed, so that the woven stent can be ensured to normally operate only by entering the inferior vena cava by more than 2cm, the opening of the lateral iliac vein can be shielded by the stent under the condition that the lateral iliac vein usually reflows, the probability of formation of thrombus of the lateral iliac vein is increased, and the problem that the iliac vein cannot be completely propped by the stent due to poor radial supporting force of the woven stent easily occurs.

It can be seen that the braided stent has good flexibility and conformability to blood vessels, but has insufficient radial supporting force due to structural problems in the aspect of mechanical properties, and is easy to shorten or even displace. From the structure and physical experiments, the weak radial supporting force of the woven stent is mainly because the woven stent belongs to a movable reticular woven structure body with a non-fixed radius. See in present clinical use, the length of support is woven to whole section of extension, can solve effectively and weave the support and contract the not good problem of treatment effect that leads to, however in the face of the narrow common iliac vein problem of cicatrix, the not enough of radial holding power can lead to the support to hardly support completely and open the common iliac vein, present art formula can use the sacculus to sick vein end expand in advance before implanting to and the postoperative expands once more in the support in order to ensure treatment, the not enough disadvantage of weaving support radial holding power has been alleviated to a certain extent. However, compared with the cutting type stent, the flexibility of the woven stent and the shape instability of the woven stent cause that the stent implanted after the operation is still in a relatively unstable state, and the mechanical performance of the cutting type stent cannot be shown under the condition that the rigidity is not as good as that of the cutting type stent along with the movement of a patient and the compression of a blood vessel wall.

SUMMERY OF THE UTILITY MODEL

To above not enough, the utility model provides a woven support reinforcement body can effectual enhancement woven support's support performance, overcomes the not enough defect of radial holding power, avoids woven support to appear the condition of shortening even displacement in the blood vessel.

The technical scheme of the utility model is that:

the reinforcing body is arranged on two sides of the woven bracket and is composed of staggered lattice structures, one side of each lattice structure, close to the woven bracket, is provided with a lantern ring, and the lantern ring is connected with the woven bracket and fixes the reinforcing body on the side edge of the woven bracket.

The lattice structure is diamond or square.

The lantern rings on the lattice structure are arranged at intervals or continuously.

The reinforcing bodies on two sides of the woven bracket are symmetrical or asymmetrical.

The length of the reinforcing body is 5mm-50 mm.

The diameter of the reinforcing body is 5mm-30 mm.

The reinforcing body is made by laser engraving.

The reinforcing body is made of degradable materials or non-degradable materials.

The degradable material is polylactic acid or magnesium alloy.

The non-degradable material is stainless steel or nickel-titanium alloy or cobalt-chromium alloy.

The utility model discloses a woven support reinforcement sets up in woven support's both sides, comprises the latticed structure that interlocks each other, and the latticed structure has the lantern ring, fixes the reinforcement in woven support both sides. The reinforcing bodies are added at the two ends of the woven support, so that the effect of limiting the radius change of the woven body is achieved, and the supporting performance of the woven support is enhanced. From mechanics angle analysis, after the radius is fixed, the mobility of weaving type support will receive the restriction in the certain degree, this includes axial extension shortening and whole bending deformation, it is more difficult before the whole chamber shape contrast restriction of support after the axial extension shortening deformation to have restricted, because the wire after through heat treatment possess better shaping ability, coil winding's net is woven and is providing better holding power to the radial under the circumstances of non-deformation, non-fixed net node also has comparatively good compliance in a certain degree simultaneously. The contrast radius is not by the knitting type support of restriction, and the performance of the knitting type support that has the rib of this scheme is compromise more comprehensively, has also great promotion radial support power under the circumstances of better compliance.

Drawings

FIG. 1 is a perspective view of a woven stent with reinforcement according to the present invention;

FIG. 2 is a front view of the symmetrical woven stent reinforcement of the present invention;

FIG. 3 is a front view of the asymmetric woven stent reinforcement of the present invention;

fig. 4 is a partial enlarged view of the connection portion between the reinforcement body and the woven stent of the present invention.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Referring to fig. 1-4, the reinforcing body of the woven rack of the present invention is disposed on both sides of the woven rack 10, the reinforcing body 20 is formed by lattice structures which are staggered with each other, the lattice structures are rhombus or square, one side of the lattice structures close to the woven rack 10 is provided with a lantern ring 21, the lantern ring 21 is connected with the woven rack 10, and the reinforcing body 20 is fixed on the side of the woven rack 10. The collars 21 may be spaced apart or arranged in series, depending on the strength of the connection.

The reinforcers 20 on both sides of the woven stent 10 may be symmetrical or asymmetrical, depending on the particular condition of the diseased vessel in the patient. As shown in fig. 2 and 3, the symmetrical form is that the reinforcements 20 on both sides have the same length L and the same diameter D. The length L and the diameter D of the reinforcing body 20 can be adjusted according to the actual requirements of the two ends of the woven stent 10 on the radial supporting force, and according to repeated experiments, the range of the length L of the reinforcing body 20 is 5mm-50mm, and the range of the diameter D of the reinforcing body 20 is 5mm-30mm, so that the woven stent is suitable for the requirements of a human body. To ensure sufficient strength and toughness of the reinforcement 20, the reinforcement 20 is made by laser engraving. The material of the reinforcement body 20 is degradable material or non-degradable material, the degradable material includes polylactic acid and magnesium alloy, and the non-degradable material includes stainless steel, nickel-titanium alloy and cobalt-chromium alloy, etc.

The utility model discloses a woven support reinforcement plays the effect that the restriction woven support 10 radius changed, can effectual enhancement woven support 10's support performance, overcomes the not enough defect of radial holding power, and at the inferior vena cava in-process that gets into, woven support 10 need not to lengthen again, reduces the complexity of intracavity operation, alleviates patient's misery. Meanwhile, the reinforcement body 20 has a simple structure, and reduces the cost caused by using a hybrid type and an asymmetric hybrid type, so that the implanted release process is easier. In the using process, the two ends of the woven stent 10 also have good fixity, and the situation that the stent is shortened or even displaced in a blood vessel is avoided.

The above disclosure is only for the embodiment of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. The woven stent reinforcement body is characterized in that the reinforcement body (20) is arranged on two sides of a woven stent (10), the reinforcement body (20) is formed by grid structures which are staggered with each other, one side of each grid structure, close to the woven stent (10), is provided with a lantern ring (21), and the lantern rings (21) are connected with the woven stent (10) to fix the reinforcement body (20) on the side edges of the woven stent (10).

2. The woven stent reinforcement of claim 1, wherein the lattice is diamond or square.

3. The woven stent reinforcement of claim 1, wherein the loops (21) on the lattice are spaced apart or continuous.

4. The woven stent reinforcement of claim 1, wherein the reinforcement (20) on either side of the woven stent (10) is symmetrical or asymmetrical.

5. The woven stent reinforcement of claim 1, wherein the reinforcement (20) has a length of 5mm to 50 mm.

6. The woven stent reinforcement of claim 1, wherein the reinforcement (20) has a diameter of 5mm to 30 mm.

7. The woven stent reinforcement of claim 1, wherein the reinforcement (20) is made by laser engraving.

8. The woven stent reinforcement of claim 1, wherein the reinforcement (20) is made of a degradable material or a non-degradable material.

9. The woven stent reinforcement of claim 8, wherein the degradable material is polylactic acid or a magnesium alloy.

10. The woven stent reinforcement of claim 8, wherein the non-degradable material is stainless steel or nitinol or cobalt chromium.