CN2158729Y

CN2158729Y - Internal stand for dilatation of blood vessel

Info

Publication number: CN2158729Y
Application number: CN 93217462
Authority: CN
Inventors: 汪忠镐; 张小明; 郭建军; 吴继东
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-06
Filing date: 1993-07-06
Publication date: 1994-03-16
Anticipated expiration: 2003-07-06

Abstract

The utility model relates to an internal stand for dilatation of blood vessel. A fine elastic stainless steel wire is arranged into a cylindrical dilatation endovascular stent in a shape of Z, two upper and lower blood vessel sutures are respectively tied into two equidistant and polygonal bottom faces by means of a series of enclosed type upper small circles and lower small circles in the Z-shaped crossing part, and two end heads of the steel wire are kinked together by knitting framework. The utility model, on the basis of keeping no retraction after blood vessel dilatation, avoids the harm that the joint of the welding wire is likely to disconnect after long-term use because of the lower strength of a welding point.

Description

Internal stand for dilatation of blood vessel

This utility model relates to a kind of woven blood vessel dilating inner support, and it is compressible, not only flexible but also can control the blood vessel diameter size especially to utilize stainless steel silk to make ground, and its steel wire two end connectors become the endovascular stent of braiding structure, belong to the A61M29/04 class.

At present the normal problem of meeting of cardiovascular disease is that to have disposed some arteriovenous narrow as the doctor, and after making its expansion, or after other vascular surgery, all may be because elasticity of blood vessels retraction interlayer form, or neointimal hyperplasia causes the restenosis of blood vessel.Angiocarpy bracket commonly used at present both at home and abroad, it is the elastomer (referring to Fig. 1) of making and arranging by zigzag by thin stainless steel silk, its shortcoming is that this support is put into blood vessel endogenous cause of ill discontinuity and also easily produced deflection, is difficult to keep the cylinder of support, and the also difficult control of diameter.It is 93217032.3 " cylindric blood vessel dilating inner supports " that the present utility model people once proposes number of patent application to Patent Office of the People's Republic of China, this structure does not bounce back after making the blood expansion, avoided the vascular restenosis after the expansion, this structure adopts laser weld twine two end connectors again, avoided soldering harmful, but can make two ends junction intensity reduce the harm that life-time service may disconnect.

The purpose of this utility model is to provide a kind of woven blood vessel dilating inner support at above-mentioned deficiency, on the basis that keeps unobstructed blood vessel, makes steel wire two end connectors need not welding, is combined into the identical syndeton of intensity.

The purpose of this utility model is to realize like this, the thin stainless steel silk of a kind of rubber-like, make cylindric blood vessel dilating inner support by Z-shaped arrangement, and pass last ringlet and a series of ringlet down that Z-shaped crossover sites makes a series of sealings with two blood vessel sutures up and down, will about two bottom surfaces be tied to form equidistant polygon; Braiding structure is twisted together in two terminations of steel wire.The braiding structure of steel wire two ends can place on arbitrary limit on the Z-shaped arrangement of steel wire three limits.

Owing to adopt such scheme, the utlity model has the effect of cylindric endovascular stent, do not bounce back after making the blood expansion, avoided the vascular restenosis after the expansion; Particularly structurally adopt woven vasodilation inner support, this structure makes steel wire two end connectors need not welding, is combined into the identical syndeton of intensity, and the harm that steel wire disconnects in having avoided using is used safety and reliability to the patient.

Below in conjunction with accompanying drawing embodiment of the present utility model is further described.

Fig. 1 is an endovascular stent commonly used both at home and abroad at present.

Fig. 2 is the woven blood vessel dilating inner support of a this utility model structural principle sketch map.

Fig. 3 is the Z-shaped arrangement expanded view of this utility model steel wire.

As shown in Figure 2, the woven blood vessel dilating inner support of this utility model is with the thin stainless steel silk 1 of rubber-like, as shown in Figure 3, its expanded view is made by Z-shaped arrangement, Z-shaped crossover sites make a series of closed on ringlet 2 and following ringlet 3, by braiding structure 4 two ends is woven together.And a series of ringlets 2 and following ringlets 3 gone up are worn and become equidistant polygon by the medical blood vessel suture 5,6 that do not absorb.The limit number the more, its appearance is more near cylindric.

These novel two steel wire end braiding structures 4 are that two ends is clenched, and its position can be selected on central arbitrary limit, Z-shaped three limits.

This utility model is through the inner test of many times of Beijing Post ﹠ Telecommunication Hospital, and clinical application effect is good, does not take place all that vascular dissection forms or neointimal hyperplasia causes the restenosis of blood vessel through clinical observation.Particularly not having wire joint to disconnect takes place.

Claims

1, the thin stainless steel silk of a kind of rubber-like (1) is made cylindric expansion endovascular stent by Z-shaped arrangement, and with a series of enclosed ringlet (2) and a series of ringlet (3) down gone up that Z-shaped crossover sites makes passed in two blood vessel sutures (5), (6) up and down, two bottom surfaces are tied to form equidistant polygon up and down, and it is characterized in that: braiding structure (4) is twisted together in two terminations of steel wire (1).

2, according to the described woven blood vessel dilating inner support of claim 1, it is characterized in that: the braiding structure (4) of described steel wire (1) two ends can place on arbitrary limit on the Z-shaped arrangement of steel wire (1) three limits.