CN2571401Y

CN2571401Y - Crossless support made of nickel-titanium memory alloy for medical use

Info

Publication number: CN2571401Y
Application number: CN02263843U
Authority: CN
Inventors: 王绵德; 胡晓民
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-20
Filing date: 2002-08-20
Publication date: 2003-09-10
Anticipated expiration: 2012-08-20

Abstract

The utility model relates to a non-cross supporter made of nickel-titanium memory alloy for medical use. The utility model is characterized in that a long enough alloy wire of which both ends are closed is wound into a tube in fold line with constant amplitude waveform, the lateral surface of the tube is provided with uniformly arranged approximate diamond meshes which are formed by the fixed connection of correspond parts of adjacent folded lines, and fixed connection piece of the utility model is a jacket tube formed by the tight fit of two adjacent strands of the alloy wire. The utility model has the advantages that the structure is novel; the contracting and the expanding performances of the diamond mesh structure are good; two strands of the alloy wire of the fixed connection piece are arranged in the jacket tube in parallel, so different parts of the alloy wire in the structure of the supporter are not crossed; the lateral surface of the utility model is flat and smooth, so no thrombus or clogging is formed when the utility model is used in a blood vessel of a human body, and the utility model can exert great effect in the treatment of the disease of angiostenosis. Rhomboidal meshes are easy to be processed, the contraction distortion quantity of the utility model is small, the displacement of the utility model which is implanted into a human body as an esophageal supporter is not easy to occur, and the accurate positioning is easy. Thereby, the utility model can provide an effective esophageal supporter for a patient after the operation on esophagus, and the patient can eat normally.

Description

Medical Ultimum Ti does not have arm support

Affiliated technical field

This utility model relates to a kind of medical radioactive and gets involved the recalled nitinol alloy stent of using in the field.

Background technology

At present, the medical support of the energy implant into body of using in the radiation interventional medicine mainly contains two classes, one class is that stainless steel silk constitutes " N " type support, one class is the support of Ultimum Ti silk braiding, utilize the performance of its energy shrinkage expansion, make the human intracavity road, due to illness blood vessel becomes and narrow positions forms certain effective passage again, reaches the purpose of improving symptom." N " type support that stainless steel silk constitutes is the tubular bracket that the warp that constitutes of the constant amplitude waveform broken line by closure and upper and lower side parallel connect to form, the nitinol alloy wire support is the tubular bracket that is woven into by alloy silk coiled coil, because the latter's plasticity is better than the former, now developed into the main body of medical support.But there is also the following shortcoming: 1, alloy silk juxtaposition back and forth in the braiding process, weave fine and closely wovenly more, silk is many more with the juxtaposition place of silk, makes the very out-of-flatness of side of support to be applied in easily formation thrombosis or obstruction in the human vas; 2, owing to adopt the coiled coil weaving manner, the contraction distortion amount of support is very big, and the deflection of its length as easily being subjected to displacement behind the Esophageal Stent implant into body, is difficult to accurate location more than one times; 3, the someone thinks to have only the shortcoming that adopts Welding Structure just can overcome braiding structure, still can't solve at present and the Welding Problems of memory alloy wire is domestic, causes the application of medical recalled nitinol alloy stent to be very limited.

Summary of the invention

Technical problem to be solved in the utility model is, overcomes the shortcoming of existing memory alloy stent interlacing structure, provides a kind of and has new structure, flat side down, medical Ultimum Ti that the contraction distortion amount is little does not have arm support.

The technical scheme that its technical problem that solves this utility model adopts is as follows: a kind of medical Ultimum Ti does not have arm support, it is characterized in that surrounding tubulose with the constant amplitude waveform broken line by the alloy silk of a sufficiently long two ends closure, have fixedly connected by the corresponding position of adjacent fold line on the tubulose side and the approximate rhombohedral mesh of evenly arranging that form, its fixed connecting piece is and adjacent two strands of close-fitting sleeve pipes of alloy silk.

The beneficial effects of the utility model are as follows: frame mode novelty, ingenious, diamond mesh structures shrinkage expansion performance is good, two strands of alloy silks at fixedly connected position are arranged in sleeve pipe abreast, realized that the alloy silk in the supporting structure does not have intersection, flat side down, bright and clean, be applied in the human vas and can not form thrombosis or obstruction, will bring into play very big effect aspect the treatment angiostenosis disease; Frame mode based on the waveform broken line makes it be easy to process rhomboidal mesh, the contraction distortion amount is little, as being difficult for being subjected to displacement behind the Esophageal Stent implant into body, be easy to accurate location, the patient who can be behind the operation on esophagus provides effective esophageal branches support, it can normally be taken food, prolong life; Overcome to have only by welding and could realize the achiasmate technology prejudice of alloy silk, technology is simple, and cost is low, makes that the interaction energy of medical recalled nitinol alloy stent is brought into play more fully.

Description of drawings

Fig. 1 is this utility model supporting structure sketch map.

Fig. 2 is an A portion enlarged diagram among Fig. 1.

Fig. 3 is a B-B cut-away view among Fig. 2.

Fig. 4 is alloy silk two ends closing structure sketch maps.

The specific embodiment

As depicted in figs. 1 and 2, it is that alloy silk 1 by a sufficiently long two ends closure surrounds tubulose with the constant amplitude waveform broken line that the medical Ultimum Ti of this utility model does not have arm support, have fixedly connected by the corresponding position of adjacent fold line on the tubulose side and the approximate rhombohedral mesh of evenly arranging that form, its fixed connecting piece is and the close-fitting sleeve pipe 2 of adjacent two strands of alloy silks.

As shown in Figure 3, among the embodiment, it is oblate that sleeve pipe 2 cross sections are, and is convenient to use the method for wearing a technology and machinery pressurization with itself and two strands of alloy silks 1 that the close up location that closely cooperates.

As shown in Figures 2 and 3, among the embodiment, have the catcher mark 21 of mechanical grip on the sleeve pipe 2, make positioning pipe and two strands of alloy silks 1 the closing up location that more closely cooperates.

As shown in Figure 4, the closing structure at alloy silk 1 two ends is, with the method tight socket alloy silk two ends of connection tube 3 by the machinery pressurization.

In order to make this utility model be suitable for manufacturing Esophageal Stent, further feature is that rack inner wall is lined with human body pellosil (meaning not shown in the figures), this film connects by medical viscose glue and the lateral alloy sericin of support, perhaps the inside and outside wall of support all is coated with the human body pellosil, and adventitia glueds joint by medical viscose glue in this.

Claims

1, medical Ultimum Ti does not have arm support, the alloy silk that it is characterized in that a sufficiently long two ends closure surrounds tubulose with the constant amplitude waveform broken line, have fixedly connected by the corresponding position of adjacent fold line on the tubulose side and the approximate rhombohedral mesh of evenly arranging that form, its fixed connecting piece is and adjacent two strands of close-fitting sleeve pipes of alloy silk.

2, medical Ultimum Ti according to claim 1 does not have arm support, it is characterized in that described fixed operating sleeve tube section is oblate.

3, medical Ultimum Ti according to claim 2 does not have arm support, it is characterized in that having on the described fixed connecting sleeve catcher mark of mechanical grip.

4, medical Ultimum Ti according to claim 1 does not have arm support, it is characterized in that the closing structure at alloy silk two ends is, with the tight socket alloy of connection tube silk two ends.

5, do not have arm support according to any described medical Ultimum Ti in the claim 1 to 4, it is characterized in that rack inner wall is lined with the human body pellosil, this film connects by medical viscose glue and the lateral alloy sericin of support.

6, medical Ultimum Ti according to claim 5 does not have arm support, it is characterized in that the inside and outside wall of support all is coated with the human body pellosil, and adventitia glueds joint by medical viscose glue in this.