CN2502717Y

CN2502717Y - Wave-shape coronary metal frame

Info

Publication number: CN2502717Y
Application number: CN01272077U
Authority: CN
Inventors: 董何彦; 王伟强; 方唯一
Original assignee: 董何彦
Current assignee: LIAONING BIOMEDICAL MATERIALS R&D CENTER CO Ltd
Priority date: 2001-12-10
Filing date: 2001-12-10
Publication date: 2002-07-31
Anticipated expiration: 2011-12-10

Abstract

An artery stent with wave and coronary shape in the field of medicine is a network structure which is shaped through the cutting of metal pipes by laser. This structure is composed of a plurality of wave cyclic compositions which are arranged in a seriatim and alignment order along the axi; every cyclic composition comprises a plurality of single waveform units and elements at both sides of each unit are also of wave structure. Along the border of the cyclic composition, an S-shaped connecter at interval of one unit is connected with the cyclic composition closely following and the connecting position is that the trough of the front low of the cyclic composition is connected with the wave crest of the back low of the cyclic composition and all connectors are in consistent direction. The broadness of the element of the cyclic composition is slightly larger than the element of the connector. The artery stent is characterized in that the coverage rate of the metal surface is moderate, the axial is shortened and the radial degree of recovery is small, the flexibility of the axial is excellent and the holding power is high and has an even distribution.

Description

A kind of waveform coronary artery metal rack

Affiliated technical field

This utility model relates to medical instruments field, especially is applied to a kind of waveform coronary artery metal rack of percutaneous transluminal coronary angioplasty.

Background technology

So-called percutaneous transluminal coronary angioplasty, be called for short the PTCA art, be under the guiding of medical imaging device, utilize puncture needle, seal wire and guiding sheath that foley's tube is injected human vas, and be transported to the coronary stricture place, and by balloon expandable the blood vessel that narrows down is expanded again then, this method is simply to save trouble than the advantage of conventional medicament and surgical intervention, breast can be do not opened, bypass surgery can be partly replaced.But this operation is not thorough, causes the postoperative vascular restenosis easily.Abroad at the early eighties coronary stent that begins one's study, this method is the metal rack of a deflation on the foley's tube outer cover before the operation, after the sacculus of belt supporting frame arrives the blood vessel place that narrows down, expansion with sacculus, support is also strutted, and after sacculus shrank back and removes, the metal rack that produces plastic deformation was then stayed the original place, and embedded blood vessel, play the effect of blood vessel dilating.The method makes that the operation long-term efficacy is good.

Existing coronary stent form has multiple, and they have their own characteristics each, and its purpose all is to improve the radial support intensity of support and axial function such as flexibility.But because of its structural limitation, existing support is difficult to reach effective unification aspect these two, though show that some support expansion back support force is stronger, but axially flexibility is not good enough, and metal surface coverage rate and axial LVFS are bigger, though the axial better softness of some support, but radial support power deficiency, the metal surface coverage rate is less, causes vascular restenosis easily, so still remain further to be improved.

Summary of the invention

Technical problem to be solved in the utility model is to provide metal surface, a kind of expansion back coverage rate moderate, axially shortens and radially degree of answer is little, and axial elasticity is good, the high and coronary stent that is evenly distributed of support force.

The purpose of this utility model is achieved through the following technical solutions: a kind of waveform coronary stent, by metal tube through being laser-cut into TRS, described pipe network structure is made up of a plurality of wavy annular structures, these circuluses alignment are in regular turn vertically arranged, and ring with encircle between be connected by S shape connector, each circulus is made up of some monophasic waveform cell cubes, it is characterized in that: described monophasic waveform cell cube is that 6 or 8 monophasic waveform cell cubes are formed, and the muscle of each monophasic waveform cell cube both sides also is a waveform configuration; Circumferential along circulus, the monophasic waveform cell cube in every interval has a S shape connector to be connected with back one circulus, and method of attachment is that the trough of last row's circulus is connected with the crest of back one row's circulus, and the orientation of all connectors is consistent; The muscle of circulus is wide, and to be slightly larger than the muscle of connector wide; The length of entire bracket is controlled by the number that increases or reduce circulus.

This utility model is owing to be laser-cut into metal tube the pipe network shape of wavy annular structure, the monophasic waveform cell cube is designed to 6 or 8, control the length of support by the number that increases the circulus structure, can keep adapting to the needs of different thicknesses blood vessel and different length pathological changes under the moderate situation of metal coverage rate; This utility model is arranged alignment before and after the wavy annular structure, trough with last row's circulus is connected with the crest of back one row's circulus, make line between the connector link position depart from the position with the support axially parallel, and the muscle of monophasic waveform cell cube both sides in the circulus also is designed to waveform configuration, and adopted S shape connector, compare with similar support like this, improved the bendability and the flexibility of support itself greatly; This utility model is designed to S shape to connector, when support struts, because the stretching, extension of connector can significantly reduce the shortening that support shaft makes progress; This utility model is wide the wide muscle that is designed to be slightly larger than connector of the muscle of circulus, can make support under the prerequisite that keeps good bending property, effectively improves its radial support power; Simultaneously, S shape connector is evenly distributed and is orientated unanimity in this utility model entire bracket structure, and support is distributed aspect flexibility and radial strength vertically symmetrically.

This utility model is because said structure and can make the metal surface coverage rate moderate, axially shortens and radially degree of answer is little, and axial elasticity is good, and support force is high and be evenly distributed.

Description of drawings

The front view of Fig. 1 TRS that to be each wavy annular structure of the present utility model be made up of 6 monophasic waveform cell cubes shows among the figure that the number of waveform circulus 2 is 11 in this support, and each circulus 2 is made up of 6 monophasic waveform cell cubes 4.

The front view of Fig. 2 TRS that to be each wavy annular structure of the present utility model be made up of 8 monophasic waveform cell cubes shows among the figure that the number of waveform circulus 2 is 6 in this support, and each circulus 2 is made up of 8 monophasic waveform cell cubes 4.

Fig. 3 looks sketch map for an A-A cross-section structure left side among Fig. 1, the position that the wavy annular structure 2 that the position of 12 hatchings that show among the figure is made up of 6 monophasic waveform cell cubes 4 is broken away at the middle part, every two sections that face mutually are sections of a monophasic waveform cell cube 4 in the structure.

Fig. 4 looks sketch map for a B-B cross-section structure left side among Fig. 1, and the position of three hatchings that show among the figure is three S shape connectors 3 profile positions in 2 three trough 6 junctions of wavy annular structure, and they face angle mutually is 120 degree.

Fig. 5 is the expansion view of Fig. 1.

Fig. 6 is the expansion view of Fig. 2.

Fig. 7 is the enlarged diagram of monophasic waveform cell cube among Fig. 5.

The specific embodiment

Example 1, as Fig. 1～shown in Figure 7, a kind of waveform coronary stent, by metal tube through being laser-cut into TRS 1, described TRS 1 is made up of 11 wavy annular structures 2, and these circuluses 2 alignment are in regular turn vertically arranged, and ring with encircle between be connected by S shape connector 3, each circulus 2 is made up of 6 (see figure 1) monophasic waveform cell cubes 4, and the muscle 5 of each monophasic waveform cell cube 4 both sides also is the waveform configuration (see figure 7); Circumferential along circulus 2, the monophasic waveform cell cube 4 in every interval has a S shape connector 3 to be connected with back one circulus 2, method of attachment is, the trough 6 of last row's circulus 2 is connected with the crest 7 of back one row's circulus 2, and the orientation of all S shape connectors 3 be consistent (seeing Fig. 5 and Fig. 6); It is wide by 9 that the muscle of circulus 2 wide 8 is slightly larger than the muscle of S shape connector 3; The length of entire bracket is controlled (seeing Fig. 1, Fig. 2) by the number that increases or reduce circulus 2.

Example 2, described TRS 1 is made up of 6 wavy annular structures 2, and described each circulus 2 is made up of 8 (see figure 2) monophasic waveform cell cubes 4, and other are with example 1.

Claims

1, a kind of waveform coronary stent, by metal tube through being laser-cut into TRS (1), described pipe network structure (1) is made up of a plurality of wavy annular structures (2), these wavy annular structures (2) alignment are in regular turn vertically arranged, and ring with encircle between be connected by S shape connector (3), each circulus (2) is made up of some monophasic waveform cell cubes (4), it is characterized in that:

A. described each circulus (2) is made up of 6 or 8 monophasic waveform cell cubes (4), and the muscle (5) of each monophasic waveform cell cube (4) both sides also is a waveform configuration;

B. circumferential along wavy annular structure (2), the monophasic waveform cell cube in every interval (4) has a S shape connector (3) to be connected with back one circulus (2), method of attachment is, the trough (6) of last row's circulus (2) is connected with the crest (7) of back one row's circulus (2), and the orientation of all S shape connectors (3) is consistent;

C. the muscle of circulus (2) wide (8) is slightly larger than the muscle wide (9) of S shape connector (3);

D. the length of entire bracket is controlled by the number that increases or reduce circulus (2).

2, waveform coronary stent according to claim 1 is characterized in that described TRS (1) is made up of 11 wavy annular structures (2), and each circulus (2) is made up of 6 monophasic waveform cell cubes (4).

3, waveform coronary stent according to claim 1 is characterized in that described TRS (1) is made up of 6 wavy annular structures (2), and each circulus (2) is made up of 8 monophasic waveform cell cubes (4).