CN205307149U - Heart coronary support - Google Patents

Abstract

The utility model discloses a heart coronary support, include: the ring, have a plurality of, and the end links body that constitutes for the ring of both ends that should the ring, the circumference distribution along the ring between the end links body has a plurality of splice bars, connector, this connector include a linear elastomer and the ring body lock joint that sets up the respectively connector at these elastomer both ends, the end links body of this connector and corresponding end to a connect in order for a plurality of rings. Above -mentioned heart coronary support, in some embodiments, ring circumference is cut apart by the splice bar, and axis that the using of formation frame was encircled is the ring array of axle, wherein two adjacent frames are different: the interval of one of which frame in -connection muscle is greater than the interval of another frame in -connection muscle. The foundation the utility model discloses a heart coronary support processing degree of difficulty is lower, but the result of use is good.

Description

Heart coronary artery support

Technical field

The utility model relates to a kind of cardiovascular, the tubulose arterial bracket in specifically cardiovascular.

Background technology

Intravascular stent is widely used in intervene operation, and especially, in interventional cardiac procedures, for example cardiac stent (Stent), is mainly used in PCI coronarius, is therefore called again coronary stent, is mainly used in dredging coronary artery.

The coronary stent using at present mainly contains metallic support, film coating bracket and Soluble Stent, wherein Soluble Stent is similar with metallic support in frame for movement, only can dissolve by human body is absorbed, in the utility model, related content is mainly the structure of heart coronary artery support, thereby whether it is had to solubility does not explain. Film coating bracket is to adhere to a skim outward at metallic support, for improving biocompatibility, can also bound drug, and for for example suppressing scar tissue in the growth of a frame peripheral.

From above content, owing to must sewing up and then the moulding healing of blood vessel after the rejection of health and angitomy, the metallic support that for example scar tissue hyperplasia can make is ineffective, even cause artery again to become narrow, even stop up, thereby need to carry out second operation, to take out support.

Certainly often putting into of support need to, by means of sacculus, on the one hand, utilize the inflation/deflation formation bulging of sacculus to strut the narrow of blood vessel, and on the other hand, deflated state is conducive to it and probes into endovascular. Correspondingly, metallic support is in place under sacculus bulging state.

Metallic support is put into easy taking-up difficulty, and metallic support was placed after a period of time, by surgical incision blood vessel, the metallic support of being close to vascular wall need to be peeled off. Due to metallic support normally metal cylinder engrave and form, a cylinder face is formed by tinsel, when stripping metal support, may cause the fragmentation of metallic support, causes the foreign matter cleaning difficulty in incision site, and can produce larger additional injury to blood vessel.

For example Z-type support, the wire that Z-type support forms is very tiny, and syndeton is sharp keen, and it is very difficult sometimes making seal wire enter branch by support space. In addition an often long former pipe of Z-type support, cuts out one section of support for diseased region, and after blanking, more sharp-pointed structure can be left in its two ends, to support to put into and take out be all very disadvantageous.

For another example ring support, the ring of ring support is not annulus, but the ring being formed by the structure of trapezoidal pulse waveform, between ring, need to arrange connector, connector is also generally waveform unit conventionally, and it can be understood as is on the whole that the connection encircling by waveform cell formation ring and by waveform unit is formed, complex structure, and engrave and form because it remains by metal cylinder on the whole, difficulty of processing is relatively large, and if intercept on the whole the difficulty of a section also can be larger. In addition the range of expansion of such support is limited by the wavelength of waveform unit, and axial bending poor performance.

Utility model content

For this reason, the purpose of this utility model is to provide a kind of difficulty of processing lower, but the good heart coronary artery support of result of use.

The utility model is by the following technical solutions:

A kind of heart coronary artery support, comprising:

Ring, has multiplely, and the two ends of this ring are the end ring body that annulus forms, and is circumferentially distributed with multiple dowels along ring between end ring body;

Connector, this connector comprises a linear elastomer and the each connector that is arranged on these elastomer two ends, the ring body snapping of the end ring body of this connector and respective ends, for the connection in turn of multiple rings.

Above-mentioned heart coronary artery support, in certain embodiments, described ring, circumferentially by dowel is cut apart, forms the axis taking ring of frame as the annular array of axle;

Wherein adjacent two frame differences: in one frame, the spacing of dowel is greater than the spacing of dowel in another frame.

Alternatively, in the larger frame of spacing, be provided with connection pattern, this connection pattern all has and is connected with four limits of frame.

Alternatively, described connection pattern is diamond, and four summits of this diamond respectively four limits of the frame larger with spacing are connected.

Alternatively, the axial length of described ring is 3mm ~ 5mm.

Alternatively, the wall thickness of described ring is 0.1016mm ~ 0.1270mm.

Alternatively, described elastomer is arcuate structure, and the center of circle of arcuate structure is corresponding to the centrifugal setting of axis of ring.

Alternatively, described elastomeric central angle is not more than 30 degree and is not less than 5 degree, and radius is not less than 5mm, and is not more than 30mm.

Alternatively, described connector is the interface that holds ring body.

Alternatively, described connector is jaw, and two tong arms of this jaw are elastomer, and mouth is the importing mouth with approaching face.

According to the utility model, the agent structure of the intravascular stent adopting is not existing by engrave the structure forming on metal circular tube, in other words, the utility model adopts split manufacture, sequently connected structure, therefore, in the time that needs intercept one section of intravascular stent, by removing the connector of interannular, the end of the connector after dismounting is ring body structurc, surfacing is smooth, thereby can ensure reasonable result of use. Simultaneously, ring and connector are manufactured respectively, then connect, can make as required the assembly that length is different, manufacture more direct convenience, especially connector directly adopts fastening structure, not only convenient connection, and convenient dismounting, manufacturing process is simple, thereby in the time putting support portions generation pathology, also easily take out support.

Brief description of the drawings

Fig. 1 is the structure principle chart according to a kind of heart coronary artery support of the present utility model.

Fig. 2 is a kind of structural representation of ring.

Fig. 3 is a kind of connector structural representation.

Fig. 4 is another kind of connector structural representation.

In figure: 1. ring, 2. connector.

11. end ring bodies, 12. dowels, 13. rectangle frames, 14. connect pattern, 15. connectors, 16. connectors.

21. connect button, 22. button mouths, and 23. elastomers, 24. transition bodies, 25. tong arms, 26. import mouth.

Detailed description of the invention

With reference to Figure of description 1, in Fig. 1, be the assembly state of intravascular stent, it is a cylindrical structure on the whole, or the structure of approximate cylinder, because connector 2 is elastomer, thereby himself there is the ability that can be bent, adapt to the physiological structure at different blood vessel position.

If regard on the whole heart coronary artery support as a cylinder, understood with centrifugal and the centripetal those skilled in the art of should be so.

Meanwhile, the foundation structure coupling that ring 1 limits has axle, ring, understands thereby circumferentially, axially should be those skilled in the art.

Referring to Figure of description 1, a kind of heart coronary artery support (hereinafter referred intravascular stent) shown in figure, its basic structure should comprise following structure:

In ring 1, figure, have 11, visible, ring 1 is base unit, can obtain by connection in turn as required the heart coronary artery support of different length.

Be connector 2 in order to what connect, two kinds of connectors 2 have been shown in Fig. 3 and Fig. 4, the consumption of connector 2 is at least 2, generally selects 2 ~ 4, all puts around ring.

Because vessel retraction or expansion can make intravascular stent in by relatively-stationary position, thereby the connector 2 between ring 1 is mainly used to the distance between retaining ring 1, presents a kind of simple interannular supporting role, and does not emphasize its supporting role to blood vessel. Passive to blood vessel is ring 1, and ring 1 need to possess certain mechanical strength, visible, belongs to the conventional design of this area for the design of intravascular stent mechanical strength, does not repeat them here.

Ring 1 is not the annulus on simple geometric meaning, and as shown in Figure 2, essence comprises two annulus to each ring 1, i.e. end ring body 11 shown in Fig. 2, and end ring body 11 is ring 1 main supporting structures as support member.

Two end ring bodies 11 form the two ends of ring 1, also need other structures to form ring wall, and in figure, the foundation structure of ring wall is dowel 12.

Ring 1 adopts relatively little cylinder to engrave and form by engraving technique.

About end ring body 11, as shown in Figure 2, the end face of end ring body 11 does fillet processing, if end ring body 11 is regarded as to an annulus, the cross section of its ring body is preferably semicircle in end face side so, thereby can not form sharp shape limit.

Nature, allows if engrave technique, and the cross section of ring body is preferably circular.

Because end ring body 11 plays main supporting role, reduce so to a certain extent the supporting role of dowel 12, but should be appreciated that if the support strength of dowel 12 is too low, can slacken the integral rigidity of ring 1, and cannot make two end ring bodies 11 keep preferably parastate.

The quantity of dowel 12 is at least 6, and the width of dowel 12 is not less than 1/3rd of ring body section radius (cross section is for circular, when state that end face side is semicircle), but should not be greater than the twice of ring body section radius, i.e. diameter.

The quantity of dowel 12 should not be more than 20, otherwise can affect the space of avoiding of ring 1.

The needs of engraving in same matrix, dowel 12 is consistent with end ring body at the thickness of ring wall direction.

Based on aforesaid structure, the configuration negligible amounts of connector 2, with respect to known heart coronary artery support, its side direction void ratio is larger, thereby can adapt to most bifurcated lesions.

In addition connector 2 parts have the larger medicine space of putting, thereby are conducive to put medicine, in order to anti-rejection or treatment diseased region.

Understandable, the intravascular stent based on said structure can carry out overlay film, meets the needed foundation structure of overlay film, thereby can be configured to overlay film frame.

Understandable, the intravascular stent based on said structure can also adopt the material of corresponding material to make becomes degradable blood vessel support in blood, i.e. Soluble Stent.

It is evident that, no matter which kind of intravascular stent, himself all can there is suitable elasticity and can buckling performance, and while emphasizing in this application the resilient property of the elastomer 23 in connector 2 for example and be subject to the restriction in selection, obviously, existing intravascular stent material all can meet the elasticity requirement of elastomer 23.

In structure shown in Fig. 2, the end ring body 11 of ring 1 has good circular arc end face, can not produce too large injury to human body thereby put into and take out.

The structure of two kinds of connectors has been shown in Fig. 3 and Fig. 4, and the connector in figure, for example, connect button 21, can be in the specific intravascular stent length of needs, opens connector, intercepts needed intravascular stent length.

The removal of connector can not damage end ring body 11, and in embodiment of the present utility model, connector 2 is near silk thread thickness, bonding strength relatively a little less than, use sharp-pointed instrument, or even syringe needle just easily tunes to open being connected of connector and end ring body 11. This kind of bonding strength can meet the bonding strength of ring 1.

And then connector 2 adopts the material the same with ring 1, while being configured to metallic support, the reasonable metal of preferred nickel/titanium alloy, cobalt-nickel alloy or biocompatibility or alloy. Although this metalloid belongs to metal or alloy that yield strength is higher, in the time of more frivolous state, use tip can cut off or choose disconnected. The metallic support of for example stainless steel, wire on its cage modle wire side is very tiny, thereby easily causes wiry breaking in the time taking out support, predictably, when intercepting the intravascular stent based on said structure of certain length, do not need specific instrument.

Meanwhile, predictably, engrave the intravascular stent forming than bulk metal pipe, after intercepting, end ring body 11 forms end face, level and smooth, and after intercepting unlike existing intravascular stent, cut wire has sharp keen fracture.

Ring 1 can be produced in batches as elementary cell, and same, connector 2 also can be produced in batches, and ring 1 plays a supportive role, and has reduced on the whole the consumption of metal, thereby can effectively reduce production cost.

The price of intravascular stent is very expensive at present, although contain the known reason of field of medicaments, also relevant with use material with its processing mode.

The introducing of connector 2, has reduced the overall consumption of overall engraving amount and metallic cylinder, and has affected less on supporting role.

In the structure shown in Fig. 2, between two end ring bodies 11, be distributed with more dowel 12, described ring 1 is circumferentially by dowel 12 is cut apart in other words, form frame to encircle 1 the axis annular array as axle, each frame is appreciated that the four frame body structures that form for the circular arc of two sections of end ring bodies 11 between two dowels 12 and two dowels 12 by adjacent, the radian of ignoring circular arc, is equivalent to rectangle frame, as shown in Figure 2 rectangle frame 13.

In Fig. 2, contain two kinds of rectangle frame 13 structures, every two adjacent rectangle frames 13 are called a unit, and so-called annular array is the annular array of this unit.

Nature, in certain embodiments, rectangle frame 13 can be made the same rectangle frame, based on the structure shown in Fig. 2, is conducive to reduce processing capacity, thereby has reduced processing intensity. Meanwhile, the quantity of dowel 12 is enough, can ensure to encircle 1 overall support stiffness.

Predictably, the buckling performance of existing intravascular stent entirety is embodied in engraving in uniformity of its entirety, and in order to meet the uniformity of buckling performance, has to design the pattern of engraving of various complexity, has greatly improved difficulty of processing.

And in the utility model, buckling performance is embodied on connector 2, encircling 1 plays a supporting role, in other words, ring 1 needn't be considered buckling performance, and only considers supporting role, thereby has thoroughly eliminated the contradiction that needs balance buckling performance and supporting role, will become fairly simple to encircling manufacturing and designing of 1 structure, machinability can be very good.

Alternatively, two rectangle frames in a unit adopt different configurations, and the rectangle frame that in figure, rectangle frame 13 directly guides is narrower, simple in structure, is beneficial to processing.

The adjacent rectangle frame of rectangle frame guiding with label 13 has adopted larger spacing, can attached other structure, and example connection pattern 14 as shown in FIG., can be also only rectangle frame, according to the configuration of different rectangle frames, obtains good support performance.

Preferably, in the larger frame of spacing, be provided with and connect pattern 14, this connection pattern 14 all has and is connected with four limits of frame. Be different from the pierced pattern of current intravascular stent, in the structure shown in Fig. 2, connect pattern 14 is main considers it is to improve intensity, thereby, preferably adopt the syndeton of triangular structure, therefore, machinability is far longer than existing intravascular stent.

And then, predictably, for balanced support intensity and bending, the tectosome of current pierced pattern is all silk thread shapes, is not only simple hollow out, and hollow out easily forms the clearly demarcated structure of seamed edge, thereby impact bending, there is in other words the structure of seamed edge structure, for example prism, in its all directions can buckling performance and different.

And in the structure shown in Fig. 1, because the bending of intravascular stent is embodied by connector 2, thereby the tectosome that connects as shown in Figure 2 pattern needs not to be circular cross-section, thereby difficulty of processing reduces greatly.

Preferably, described connection pattern 14 is diamond, four summits of this diamond respectively four limits of the frame larger with spacing are connected, as shown in Figure 2, form multiple triangular structures, support thereby form reliably, and this connection pattern 14 is all simple linear structures with respect to existing pierced pattern, machinability is very strong.

And in the structure shown in Fig. 2, emphasize support strength, and needn't consider buckling performance, thereby the triangular structure of constructing meeting under the condition that sideshake is certain, support strength is than large many of traditional pierced pattern.

Further, the axial length of described ring 1 is 3mm ~ 5mm, and ring 1 axial length is unsuitable excessive, otherwise the larger ring 1 of self support strength can affect intravascular stent entirety can buckling performance, encircle 1 extreme length and can not exceed 8mm, generally can not exceed 5mm.

Ring 1 is unsuitable too short, otherwise support performance cannot ensure, and operability also can variation, exceeds the discrimination ability of human eye.

Further, the wall thickness of described ring 1 is 0.1016mm ~ 0.1270mm, slightly thinner than conventional intravascular stent, saves under the condition of material, still possesses suitable support performance, thereby have better promotional value based on aforesaid structure.

Preferably, described elastomer 23 is arcuate structure, thereby its wrap direction is limited in advance, and, if by the axial normal pressure of ring 1, will inevitably make the curvature of arcuate structure larger, its wrap direction is determined, instead of unpredictable.

For this reason, setting one can wrap direction, is limited by the center of circle of arcuate structure, and, corresponding to the centrifugal setting of axis of ring 1, in other words, arcuate structure encircles to centripetal side.

For avoiding the impact of connector 2 on blood flow, reduce its degree of depth to centripetal side arch, the central angle of described elastomer 23 is not more than 30 degree and is not less than 5 degree, and radius is not less than 5mm, and is not more than 30mm.

Wherein central angle is unsuitable too small, otherwise wrap direction cannot ensure, central angle is excessive can make its encircle into the part of centripetal side too much.

In the structure shown in Fig. 3, described connector is the interface 21 that holds ring body, uses for example needle point, can choose out interface 21 from the button mouth 22 shown in Fig. 3.

Hold structure and can meet needed bonding strength, meanwhile, also easily operation.

In certain embodiments, as shown in Figure 4, described connector is jaw, and two tong arms 25 of this jaw are elastomer, and mouth is the importing mouth 26 with approaching face. The elastic performance that depends on jaw self carries out snapping, simple in structure, and it is relatively convenient to assemble.

25 of breakdown tong arms can be from importing mouth 26 breakdowns.

The inner face of tong arm 25 can arrange thrust surface, and does not affect the breakdown going out from importing mouth 26.

Claims (10)

1. a heart coronary artery support, is characterized in that, comprising:

Ring (1), has multiplely, and the two ends of this ring (1) are the end ring body (11) that annulus forms, and is circumferentially distributed with multiple dowels (12) along ring (1) between end ring body (11);

Connector (2), this connector (2) comprises a linear elastomer (23) and is arranged on each connector at this elastomer (23) two ends, the ring body snapping of the end ring body (1) of this connector and respective ends, for the connection in turn of multiple rings (1).

2. heart coronary artery support according to claim 1, is characterized in that, described ring (1) is circumferentially cut apart by dowel (12), forms the axis taking ring (1) of frame as the annular array of axle;

Wherein adjacent two frame differences: in one frame, the spacing of dowel (12) is greater than the spacing of dowel (12) in another frame.

3. heart coronary artery support according to claim 2, is characterized in that, in the larger frame of spacing, is provided with and connects pattern (14), and this connection pattern (14) all has and is connected with four limits of frame.

4. heart coronary artery support according to claim 3, is characterized in that, described connection pattern is diamond, and four summits of this diamond respectively four limits of the frame larger with spacing are connected.

5. according to the arbitrary described heart coronary artery support of claim 1 to 4, it is characterized in that, the axial length of described ring (1) is 3mm ~ 5mm.

6. heart coronary artery support according to claim 5, is characterized in that, the wall thickness of described ring (1) is 0.1016mm ~ 0.1270mm.

7. according to the arbitrary described heart coronary artery support of claim 1-4, it is characterized in that, described elastomer (23) is arcuate structure, and the center of circle of arcuate structure is corresponding to the centrifugal setting of axis of ring (1).

8. heart coronary artery support according to claim 7, is characterized in that, the central angle of described elastomer (23) is not more than 30 degree and is not less than 5 degree, and radius is not less than 5mm, and is not more than 30mm.

9. according to the arbitrary described heart coronary artery support of claim 1-4, it is characterized in that, described connector is the interface (21) that holds ring body.

10. according to the arbitrary described heart coronary artery support of claim 1-4, it is characterized in that, described connector is jaw, and two tong arms (25) of this jaw are elastomer, and mouth is the importing mouth (26) with approaching face.