CN201959034U

CN201959034U - Blood vessel bracket

Info

Publication number: CN201959034U
Application number: CN2010206965443U
Authority: CN
Inventors: 张佳; 李�雨; 王森; 金巧蓉; 朱琇琪; 谢志永; 罗七一
Original assignee: Microport Medical Shanghai Co Ltd
Current assignee: Minimally invasive Shentong medical technology (Shanghai) Co., Ltd.
Priority date: 2010-12-31
Filing date: 2010-12-31
Publication date: 2011-09-07
Anticipated expiration: 2020-12-31

Abstract

The utility model discloses a blood vessel bracket which comprises a bracket main body, wherein the bracket main body adopts a mesh tubular structure consisting of lines of parallelogram-shaped cells which are interlaced with one another; in two adjacent lines of cells in contact with one another, the long edges of one line of cells are parallel to the short edges of the other line of cells, and the short edges of one line of cells are parallel to the long edges of the other line of cells. The blood vessel bracket provided by the embodiment of the utility model has the following characteristics: when the bracket main body with the mesh tubular structure is deformed and bent due to an external force, each cell can rotate round the symmetrical center of the bracket main body, so that the stress concentration in the deformation process of the blood vessel bracket is reduced and the cushioning and protecting functions can be exerted on the bracket main body with the mesh tubular structure in the stretching or extruding process; therefore, the shape of the mesh tubular structure can be maintained. The blood vessel bracket has enough supporting strength in the radial direction and good flexibility in the axial direction.

Description

A kind of intravascular stent

Technical field

The application relates to medical instruments field, particularly relates to a kind of intravascular stent.

Background technology

Along with the raising of people's living standard and the change of life style, the cardiovascular and cerebrovascular disease sickness rate is more and more higher, has become one of principal disease of harm humans life security by the narrow coronary heart disease that causes of cardiovascular.And the interventional therapy method has become the narrow main method of treatment cardiovascular at present because wound is little, effective.The interventional therapy method is meant on the basis that balloon expandable is shaped, implant inner support in the vascular lesion section, the inner support of implantation can support stenosis occlusion section blood vessel, reduces blood vessel elasticity retraction and moulding again, keep the tube chamber blood flow unobstructed, the part inner support also has the effect of prevention of restenosis.

Angle from clinical use, intravascular stent need satisfy following technical specification simultaneously in the ideal implant into body: radial direction has enough support forces, and less radially rebound degree, axial direction has good compliance, and less axial retraction rate also needs to have proper metal coverage rate etc. in addition.Present existing intravascular stent can be divided into two kinds of eject support and balloon expandable stent by its expansion mode.

By to prior art research, the applicant finds: in existing two kinds of intravascular stents, the eject support self possesses high resiliency, can not rely on sacculus and expansion voluntarily in blood vessel; And balloon expandable stent self is nonelastic, must rely on balloon expandable to be attached at blood vessel to the certain diameter value.Because material and structural limitation, existing these two kinds of intravascular stents are difficult to reach unified effectively aspect two of radial support intensity and axial compliances.Though for example have stronger radial support intensity from playing support, its axial compliance is not good enough, and the metal coverage rate is with axially the cripetura rate is bigger; Balloon expandable stent then is that axial compliance is better, but radial support power deficiency, and the metal coverage rate is too little, causes vascular restenosis easily.

Therefore existing intravascular stent can't satisfy clinical demand, needs badly a kind ofly both to have had strong radial support degree, the intravascular stent that has good axial compliance again.

The utility model content

In view of this, the embodiment of the present application provides a kind of intravascular stent, the webmaster shape structure that its rack body is made up of the interlaced parallelogram element lattice of multiple row has enough support strengths to be implemented in radial direction, and has good compliance at axial direction.

For achieving the above object, the technical scheme that provides of the embodiment of the present application is as follows:

A kind of intravascular stent, comprise rack body, wherein: the webmaster shape structure of described rack body for forming by multiple row cell interlaced, that be shaped as parallelogram, and in the adjacent two column unit lattice, the minor face of cell of wherein contacting in the long limit of the cell in the string and another row parallels, and minor face parallels with the long limit of the cell that contacts during another is listed as.

Preferably, unit center of a lattice described in described every column unit lattice point-blank.

Preferably, in the described adjacent two column unit lattice, all limits altogether, position that contact of the cell that wherein contacts in the cell in the string and another row.

Preferably, each cell obtuse angle angle is identical in the described multiple row cell, and the obtuse angle angle is at the 95-175 degree.

By above technical scheme as seen; this intravascular stent that the embodiment of the present application provides comprises the rack body of webmaster shape structure; and the structural grid of webmaster shape is interlaced by multiple row; the cell that is shaped as parallelogram is formed; in adjacent two column unit lattice; wherein the long limit of the cell in the string with another row in contact cell minor face point-blank; minor face with another row in contact cell long limit point-blank; in addition because each cell of this intravascular stent is centrosymmetric structure; when the rack body of webmaster shape structure is subjected to the external force deformation bending; each cell can be around its symmetrical centre rotation; make the stress concentration in the intravascular stent deformation process reduce; can play the effect that cushions and protect to webmaster shape structure stand main body suffered stretching or extruding, keep the shape of webmaster shape structure.Therefore this intravascular stent has enough support strengths in radial direction, can support the narrow blood vessel of lesion, and have good compliance at axial direction, can realize evenly crooked.

Simultaneously, the rack body of this intravascular stent is made up of multiple row parallelogram element lattice, when operation, makes intravascular stent to have been increased the motility and the scope of application of induction system by in the induction system very little along radial compression to diameter.

In addition, the interlaced cell of multiple row on the rack body makes this intravascular stent have enough metal coverage rates, not only when implanting, when this intravascular stent passes through crooked blood vessel, avoid its surface the generation at " sticking up skin " angle to occur, reduce damage, behind implant into body, can also effectively cover the vascular lesion position blood vessel wall.

Description of drawings

In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, the accompanying drawing that describes below only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

The deployed configuration sketch map of the intravascular stent that Fig. 1 provides for the embodiment of the present application;

The structural representation of the first module lattice of the intravascular stent that Fig. 2 provides for the embodiment of the present application;

The structural representation of second cell of the intravascular stent that Fig. 3 provides for the embodiment of the present application.

The specific embodiment

In order to make those skilled in the art person understand technical scheme among the application better, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all should belong to the scope of the application's protection.

The deployed configuration sketch map of the intravascular stent that Fig. 1 provides for the embodiment of the present application.

As shown in Figure 1, this intravascular stent comprises the rack body 1 of webmaster shape structure, and the grid on the rack body 1 is made up of the multiple row cell, as shown in Figure 1, the multiple row cell alternately is made of mutually row 11 and row 12, and row 11 and row 12 contacted cells are interlaced.

The shape of the cell on row 11 and the row 12 all is a parallelogram, in each row the shape of cell identical, and point-blank with the unit center of a lattice in the string.Row 11 are made up of a plurality of first module lattice 2, and row 12 are made up of a plurality of second cells 3, and with reference to figure 1, as shown in Figures 2 and 3, the first module lattice 2 and second cell 3 are parallelogram.Because parallelogram has unstability, so can make rack body 1 can stretch at axial direction, has good compliance.

As shown in Figure 1, first module lattice 2 in the row 11 contact with two cells in the row 12 respectively, be respectively second cell 31 and second cell 32, wherein: the long limit of first module lattice 2 parallels with the minor face of second cell 31, and the minor face of first module lattice 2 parallels with the long limit of second cell 31; The minor face of first module lattice 2 also parallels with the long limit of second cell 32, the long limit of first module lattice 2 also parallels with the minor face of second cell 32, and the first module lattice 2 and second cell 31, first module lattice 2 and second cell, 32 contacted positions all are total to the limit, as shown in Figure 1, the minor face that is first module lattice 2 is total to the limit mutually with the long limit of second cell 31, and the long limit of first module lattice 2 is total to the limit mutually with the minor face of second cell 32.In the embodiment of the present application, the position between the contacted cell concerns all and concerns identical with the position between first module lattice 2 and second cell 31, first module lattice 2 and second cell 32 in the cell (except that the edge) in each on the rack body 1 row and adjacent another row.

Can see from the relation of the position between above-mentioned first module lattice 2 and second cell 31, first module lattice 2 and second cell 32, when 2 distortion of first module lattice, because its minor face is total to the limit mutually with the long limit of second cell 31, its long limit is total to the limit mutually with the minor face of second cell 32, so when first module lattice 2 are subjected to external force deformation, will be under the pining down of second cell 31 and second cell 32 and return to the original form.Each cell in the same rack body 1 pining down of other cells that all can be subjected to contacting makes rack body 1 have elasticity in radial direction, and promptly this has stronger radial support power.

In addition, in the embodiment of the present application, the acute angle tip of the first module lattice 2 and second cell 3 is provided with the recessed projection of side, and as shown in Figures 2 and 3, two recessed projections of side of first module lattice 2 are that two recessed projections of side of 4, the second cells 3 are 5.The parallelogram acute angle of the first module lattice 2 and second cell 3 is provided with the recessed projection of side, and its effect is: deformation direction that one, can the guidance unit lattice; Two, can reduce stress concentration in the deformation of timbering process, when deformation of timbering, cushioning and protection be played in the stretching or the extruding of rack body 1 structural elements.In addition, the angle at obtuse angle is identical on first module lattice 2 and second cell 3, and in the embodiment of the present application, the angle Selection at obtuse angle is at the 95-175 degree.

This intravascular stent that the embodiment of the present application provides comprises the rack body of webmaster shape structure; and the structural grid of webmaster shape is interlaced by multiple row; the cell that is shaped as parallelogram is formed; in adjacent two column unit lattice; wherein the long limit of the cell in the string with another row in contact cell minor face point-blank; minor face with another row in contact cell long limit point-blank; in addition because each cell of this intravascular stent is centrosymmetric structure; when the rack body of webmaster shape structure is subjected to the external force deformation bending; each cell can be around its symmetrical centre rotation; make the stress concentration in the intravascular stent deformation process reduce; can play the effect that cushions and protect to webmaster shape structure stand main body suffered stretching or extruding, keep the shape of webmaster shape structure.Therefore this intravascular stent has enough support strengths in radial direction, can support the narrow blood vessel of lesion, and have good compliance at axial direction, can realize evenly crooked.

The above only is the application's a preferred implementation, makes those skilled in the art can understand or realize the application.Multiple modification to these embodiment will be conspicuous to one skilled in the art, and defined herein General Principle can realize under the situation of the spirit or scope that do not break away from the application in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims

1. intravascular stent, it is characterized in that, comprise rack body, wherein: the webmaster shape structure of described rack body for forming by multiple row cell interlaced, that be shaped as parallelogram, and in the adjacent two column unit lattice, the minor face of cell of wherein contacting in the long limit of the cell in the string and another row parallels, and minor face parallels with the long limit of the cell that contacts during another is listed as.

2. intravascular stent according to claim 1 is characterized in that, the unit center of a lattice point-blank described in described every column unit lattice.

3. intravascular stent according to claim 2 is characterized in that, in the described adjacent two column unit lattice, and all limits altogether, position that contact of the cell that wherein contacts in the cell in the string and another row.

4. intravascular stent according to claim 3 is characterized in that, each cell obtuse angle angle is identical in the described multiple row cell, and the obtuse angle angle is at the 95-175 degree.