CN105496604B - Heart coronary artery support - Google Patents

Abstract

The invention discloses a kind of heart coronary artery support, including：Ring, has multiple, and the both ends of the ring are the end ring body that annulus is formed, and have multiple dowels along the circumferentially distributed of ring between end ring body；Connector, the connector include a linear elastomer and are arranged on each connector at the elastomer both ends, the ring body snapping of the end ring body of the connector and respective end, for being sequentially connected with for multiple rings.Above-mentioned heart coronary artery support, in certain embodiments, the ring are circumferentially split by dowel, form annular array of the axis using ring as axle of frame；Wherein adjacent two frame is different：The spacing of one inframe dowel is more than the spacing of another inframe dowel.Arterial bracket difficulty of processing according to the present invention is relatively low, but using effect is good.

Description

Heart coronary artery support

Technical field

The present invention relates to a kind of cardiovascular, the coronary artery support specifically in angiocarpy.

Background technology

Intravascular stent is widely used in intervention operation, especially in interventional cardiac procedures, such as cardiac stent （Stent）, it is mainly used in PCI coronarius, therefore also known as coronary stent, is mainly used in dredging coronal move Arteries and veins blood vessel.

Coronary stent used at present mainly has metallic support, film coating bracket and Soluble Stent, wherein solvable Property support is similar with metallic support in mechanical structure, can only be absorbed and dissolved by human body, in the present invention, involved And content be mainly the structure of heart coronary artery support, thus whether it is not described with solubility.Film coating bracket It is then to adhere to a tunic outside metallic support, for improving biocompatibility, can be combined with medicine, for suppresses such as scar It is organized in the growth of branch frame peripheral.

From the above content, it can be seen that due to that must be sutured after the rejection and angitomy of body and then blood vessel is moulding Healing, such as the metallic support that scar tissue hyperplasia can make are ineffective, or even cause artery to become narrow again, or even stifled Plug, thus need to carry out second operation, to take out support.

Certain being put into for support is generally required by means of sacculus, on the one hand, is formed bulging using the inflation/deflation of sacculus and is strutted The narrow of blood vessel, on the other hand, deflated state are then advantageous to its probeing into the blood vessels.Correspondingly, metallic support is in ball It is in place under capsule bulging state.

Metallic support be put into easily take out it is difficult, after metallic support places a period of time, by surgical incision blood vessel, it is necessary to The metallic support for being close to vascular wall is peeled off.Because metallic support is typically that metal cylinder is engraved and formed, cylinder face is linear by wire During into, stripping metal support, the broken of metallic support is may result in, causes the foreign matter cleaning in incision site difficult, and Bigger additional injury can be produced to blood vessel.

Such as Z-type support, the wire that Z-type support is formed is very tiny, and attachment structure is sharp keen, sometimes seal wire is led to It is extremely difficult to cross support space to enter branch.In addition Z-type support often manage by a long original, cuts out one section and is used for disease Become the support at position, after blanking, its both ends can leave the sharp structure of comparison, to support to be placed and taken out all be very unfavorable 's.

For another example ring support, the ring of ring support is not annulus, but the ring being made up of the structure of trapezoidal pulse shape, ring Between need set connector, usual connector is typically also waveform element, and it can be understood as by waveform element on the whole The connection for forming ring and ring being carried out by waveform element is formed, complicated, and on the whole because it is still to pass through metal cylinder Engrave and form, difficulty of processing compare it is larger, and if intercept one section of difficulty on the whole also can be bigger.In addition such support Range of expansion limited by the wavelength of waveform element, and axial bending poor performance.

The content of the invention

Therefore, it is an object of the invention to provide a kind of difficulty of processing is relatively low, but the good heart coronaries of using effect are moved Pulsation frame.

The present invention uses following technical scheme：

A kind of heart coronary artery support, including：

Ring, has multiple, and the both ends of the ring are the end ring body that annulus is formed, between end ring body along ring it is circumferentially distributed have it is multiple Dowel；

Connector, the connector include a linear elastomer and are arranged on each connection at the elastomer both ends The ring body snapping of the end ring body of head, the connector and respective end, for being sequentially connected with for multiple rings.

Above-mentioned heart coronary artery support, in certain embodiments, the ring are circumferentially split by dowel, form frame Annular array using the axis of ring as axle；

Wherein adjacent two frame is different：The spacing of one inframe dowel is more than the spacing of another inframe dowel.

Alternatively, the larger inframe of spacing is provided with connecting pattern, and there is connection on four sides of the connecting pattern and frame.

Alternatively, the connecting pattern is diamond, four summits of the diamond respectively the frame larger with spacing four Individual side connection.

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

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

Alternatively, the elastomer is arcuate structure, and the center of circle of arcuate structure is set corresponding to the axis centrifugation of ring.

Alternatively, for the central angle of the elastomer no more than 30 degree and not less than 5 degree, radius is not less than 5mm, and is not more than 30mm。

Alternatively, the connector is the interface of wrapping ring body.

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

According to the present invention, the agent structure of used intravascular stent be not it is existing by engraved on metal circular tube and Into structure, in other words, the present invention use separately manufacturing, sequently connected structure, therefore, when needing one section of blood vessel of interception During support, by removing the connector of interannular, the end of the connector after dismounting is ring body structurc, and surfacing is smooth, It thereby may be ensured that relatively good using effect., can be as needed meanwhile ring and connector manufacture respectively, then connect The different assembly of length is made, manufacture more direct convenience, especially connector directly use fastening structure, not only facilitate connection, And be also convenient for removing, manufacturing process is simple, so as to when putting support portions generation lesion, 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 invention.

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

Fig. 3 is a kind of connector structural representation.

Fig. 4 is another connector structural representation.

In figure：1. ring, 2. connectors.

11. end ring body, 12. dowels, 13. rectangle frames, 14. connecting patterns, 15. connectors, 16. connectors.

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

Embodiment

It is the assembly state of intravascular stent with reference to Figure of description 1, in Fig. 1, it is a cylindrical structure on the whole, or The structure of approximate cylinder, because connector 2 is elastomer, thus its own has the ability that can be bent, and adapts to different blood vessel The physiological structure at position.

If regard heart coronary artery support as a cylinder on the whole, then this area should be with centripetal with centrifugation Technical staff understood.

Meanwhile the foundation structure matching that ring 1 is limited has axle, ring, so as to which circumferential, axial direction should be those skilled in the art Understood.

Referring to Figure of description 1, a kind of heart coronary artery support shown in figure（Hereinafter referred intravascular stent）, its base This structure should include following structure：

Ring 1, there are 11 in figure, it is seen that, unit based on ring 1, it can be obtained not by connection sequentially as needed With the heart coronary artery support of length.

It is connector 2 to what is connected, shows two kinds of connectors 2 in Fig. 3 and Fig. 4, the dosage of connector 2 is at least 2 It is individual, 2 ~ 4 are typically chosen, is put around ring.

Because vessel retraction or expansion can make intravascular stent be in the position being relatively fixed, thus, between ring 1 Connector 2 is mainly used to the distance between retaining ring 1, a kind of simple interannular supporting role is presented, without emphasizing it to blood vessel Supporting role.What blood vessel was played a supportive role is ring 1, and ring 1 needs to have certain mechanical strength, it is seen that, for blood vessel The design of rack mechanical strength belongs to the conventional design of this area, will not be repeated here.

Ring 1 is not the annulus on simple geometric meaning, and each ring 1 is as shown in Fig. 2 essence includes two annulus, i.e., End ring body 11 shown in Fig. 2, end ring body 11 are main supporting structure of the ring 1 as support member.

Two end ring bodies 11 form the both ends of ring 1, it is also necessary to which other structures body forms ring wall, the foundation structure of ring wall in figure It is dowel 12.

Ring 1 is engraved by engraving technique using relatively small cylinder and formed.

On end ring body 11, as shown in Fig. 2 fillet processing is done in the end face of end ring body 11, if end ring body 11 is regarded as One annulus, then the section of its ring body is preferably semicircle in end face side, so as to form sharp shape side.

If naturally, engraving technique permission, the section of ring body is preferably circle.

Because end ring body 11 plays main supporting role, then the support for reducing dowel 12 to a certain extent is made With, it is to be understood that, if the support strength of dowel 12 is too low, the integral rigidity of ring 1 can be slackened, and two end ring can not be made Body 11 keeps preferable parastate.

The quantity of dowel 12 is at least 6, and the width of dowel 12 is not less than ring body section radius（Section is circle, When end face side is the state of semicircle）1/3rd, but be not preferably greater than twice of ring body section radius, i.e. diameter.

The quantity of dowel 12 should not be more than 20, and otherwise can influence ring 1 avoids space.

The needs engraved in same matrix, thickness of the dowel 12 in ring wall direction are consistent with end ring body.

Based on foregoing structure, the configuration negligible amounts of connector 2, relative to known heart coronary artery support, its Lateral space is bigger, enables adaptation to most of bifurcated lesions.

In addition the part of connector 2 have it is bigger put medicine space, so as to be advantageous to put medicine, to anti-rejection or treatment Diseased region.

It should be understood that the intravascular stent based on said structure can carry out overlay film, meet the basis knot required for overlay film Structure, thus can be structured as overlay film frame.

Turn into it should be understood that the intravascular stent based on said structure can also use the material of corresponding material to make in blood Degradable blood vessel support in liquid, you can dissolubility support.

It is readily apparent that no matter which kind of intravascular stent, its own can all have suitable elasticity and can buckling performance, and When emphasizing the resilient property of the elastomer 23 in such as connector 2 in this application and by the limitation in selection, it is clear that existing Intravascular stent material can meet the aeroelastic requirements of elastomer 23.

In structure shown in Fig. 2, the end ring body 11 of ring 1 has good circular arc end face, so as to be placed and taken out not Too big injury can be produced to human body.

Show the structure of two kinds of connectors in Fig. 3 and Fig. 4, the connector in figure, such as button 21 is connect, spy can needed Fixed intravascular stent length is to open connector, intercepts required intravascular stent length.

The removal of connector will not damage end ring body 11, and in an embodiment of the present invention, connector 2 is thick near silk thread Carefully, bonding strength is relatively weak, and using sharp instrument, even syringe needle is easy for tuning to open the company of connector and end ring body 11 Connect.This kind of bonding strength can meet the bonding strength of ring 1.

And then connector 2, using the material as ring 1, when being configured to metallic support, preferred nickel/titanium alloy, cobalt nickel close Golden or relatively good biocompatibility metal or alloy.This metalloid although belong to the higher metal of yield strength or Alloy, but when being in more frivolous state, can cut off or break using tip.Such as the metal branch of stainless steel Frame, the wire on its cage modle wire side is very tiny, so as to easily cause the broken of wire when taking out support, it is anticipated that , during the intravascular stent based on said structure for intercepting certain length, and do not need specific instrument.

Simultaneously, though it is foreseeable that the intravascular stent engraved compared to bulk metal pipe, after interception, end ring body 11 End face is formed, smoothly, after being intercepted rather than existing intravascular stent, cut-off wire has sharp keen fracture.

Ring 1 can be produced in batches as elementary cell, and equally, connector 2 can also be produced in batches, and ring 1 plays a supportive role, Reduce the dosage of metal on the whole, so as to effectively reduce production cost.

The price of intravascular stent is very expensive at present, although the reason for containing known in field of medicaments, also with its side of processing Formula is relevant with using material.

The introducing of connector 2, reduce the overall dosage of overall engraving amount and metallic cylinder, and supporting role is influenceed It is smaller.

In the structure shown in Fig. 2, more dowel 12 is distributed between two end ring bodies 11, in other words the ring 1 It is circumferential to be split by dowel 12, annular array of the axis using ring 1 as axle of frame is formed, each frame is appreciated that as by phase The four side frame structures that the circular arc of two sections of end ring bodies 11 between adjacent two dowels 12 and two dowels 12 is formed, ignore The radian of circular arc, it is equivalent to rectangle frame, rectangle frame 13 as shown in Figure 2.

Contain two kinds of structures of rectangle frame 13 in Fig. 2, the adjacent rectangle frame 13 of each two is referred to as a unit, so-called annular Array is the annular array of the unit.

Naturally, in certain embodiments, rectangle frame 13 can make the same rectangle frame, based on the structure shown in Fig. 2, have Beneficial to processing capacity is reduced, so as to reduce processing intensity.Meanwhile the quantity of dowel 12 is enough, the overall of ring 1 can be ensured Support stiffness.

Predictably, the overall buckling performance of existing intravascular stent be embodied in its it is overall engrave in uniformity, And in order to meet the uniformity of buckling performance, it has to design it is various it is complicated engrave pattern, substantially increase difficulty of processing.

And in the present invention, buckling performance is embodied on connector 2, and ring 1 is then played a supporting role, and in other words, ring 1 need not Consider buckling performance, and only consider supporting role, thus completely eliminate the contradiction for needing to balance buckling performance and supporting role, Design and manufacture to the structure of ring 1 will become fairly simple, and machinability can be very good.

Alternatively, two rectangle frames in a unit use different configurations, and rectangle frame 13 directly guides in figure Rectangle frame is narrower, simple in construction, beneficial to processing.

, can be with other attached knots and the rectangle frame adjacent with the rectangle frame that label 13 guides then employs larger spacing Structure, such as the connecting pattern 14 shown in figure, can also be only rectangle frame, according to the configuration of different rectangle frames, obtain good Support performance.

Preferably, the larger inframe of spacing is provided with connecting pattern 14, and the connecting pattern 14 is connected with four sides of frame. Different from the pierced pattern of current intravascular stent, in the structure shown in Fig. 2, connecting pattern 14 mainly considers it is to improve by force Degree, thus, it is desirable to using the attachment structure of triangular structure, therefore, machinability is far longer than existing intravascular stent.

And then, though it is foreseeable that for balanced support intensity and bending, the tectosome of current pierced pattern is equal It is silk thread shape, not exclusively simple hollow out, hollow out easily forms the clearly demarcated structure of seamed edge, so as to influence bending, or Person says the structure with seamed edge structure, such as prism, in its all directions can buckling performance and different.

And in the construction shown in fig. 1, by the bending of intravascular stent is embodied by connector 2, thus as in Fig. 2 The tectosome of shown connecting pattern needs not be circular cross-section, thus difficulty of processing substantially reduces.

Preferably, the connecting pattern 14 is diamond, four summits of diamond frame larger with spacing respectively The connection of four sides, as shown in Fig. 2 form multiple triangular structures, so as to form reliable support, and the phase of this connecting pattern 14 It is simple linear structure for existing pierced pattern, machinability is very strong.

And in the structure shown in Fig. 2, support strength is emphasized, without considering buckling performance, thus three constructed Angular structure is under conditions of meeting that sideshake is certain, much bigger than traditional pierced pattern of support strength.

Further, the axial length of the ring 1 is 3mm ~ 5mm, and the axial length of ring 1 is unsuitable excessive, and otherwise itself is propped up The bigger ring 1 of support intensity can influence intravascular stent it is overall can buckling performance, the extreme length of ring 1 is no more than 8mm, typically No more than 5mm.

Ring 1 is unsuitable too short, and otherwise support performance can not ensure, and operability can also be deteriorated, i.e. the discrimination beyond human eye Ability.

Further, the wall thickness of the ring 1 is 0.1016mm ~ 0.1270mm, and the intravascular stent than routine is slightly thin, saves material Under conditions of material, still possess suitable support performance based on foregoing structure, thus there is more preferable promotional value.

Preferably, the elastomer 23 is arcuate structure, so as to which its wrap direction is pre-defined, i.e., if with ring 1 The normal pressure of axial direction, will necessarily make the curvature of arcuate structure bigger, i.e., its wrap direction is to determine, rather than unpredictable 's.

Therefore, setting one can wrap direction, is limited by the center of circle of arcuate structure, i.e., corresponding to ring 1 axis centrifuge sets Put, in other words, i.e., arcuate structure encircles to centripetal side.

To avoid influence of the connector 2 to blood flow, its depth encircleed to centripetal side, the central angle of the elastomer 23 are reduced No more than 30 degree and not less than 5 degree, radius is not less than 5mm, and is not more than 30mm.

Wherein central angle is unsuitable too small, and otherwise wrap direction can not ensure that central angle is excessive, and its that can make encircles into centripetal The part of side is excessive.

In the structure shown in Fig. 3, the connector is the interface 21 of wrapping ring body, can be from Fig. 3 using such as needle point Shown in button mouth 22 choose out interface 21.

Wrapping structure can meet required bonding strength, meanwhile, also easily operation.

In certain embodiments, as shown in figure 4, the connector is jaw, two tong arms 25 of the jaw are elastomer, Mouth is the importing mouth 26 with approaching face.Elastic performance i.e. dependent on jaw itself carries out snapping, simple in construction, and assembling is relative It is more convenient.

Breakdown tong arm 25 then can be from breakdown at importing mouth 26.

The inner face of tong arm 25 can set thrust surface, without the breakdown for influenceing to go out from importing mouth 26.

Claims (7)

1. A kind of 1. heart coronary artery support, it is characterised in that including：

   Ring（1）, for providing the support of heart coronary artery, there is multiple, and the ring（1）Both ends be annulus form end ring body （11）, end ring body（11）Between along ring（1）Circumferentially distributed have multiple dowels（12）；

   Connector（2）, for providing sideshake and bending, the connector（2）Including a linear elastomer（23）With It is arranged on the elastomer（23）The end ring body of each connector at both ends, the connector and respective end（1）Ring body snapping, with For multiple rings（1）Be sequentially connected with, for providing ring（1）Between support；

   Adjacent ring（1）Between be furnished with 2 ~ 4 connectors（2）, connector（2）In ring（1）Circumferential uniformly arrangement；

   The ring（1）Circumferential is dowel（12）Split, formed frame with ring（1）Axis be axle annular array；

   Wherein adjacent two frame is different：One inframe dowel（12）Spacing be more than another inframe dowel（12）Spacing；

   The larger inframe of spacing is provided with connecting pattern（14）, the connecting pattern（14）It is connected with four sides of frame；

   The ring（1）Axial length be 3mm ~ 5mm.
2. 2. heart coronary artery support according to claim 1, it is characterised in that the connecting pattern is diamond, should Four sides of four summits of diamond frame larger with spacing respectively are connected.
3. 3. heart coronary artery support according to claim 1 or 2, it is characterised in that the ring（1）Wall thickness be 0.1016mm~0.1270mm。
4. 4. heart coronary artery support according to claim 1 or 2, it is characterised in that the elastomer（23）For arc Structure, and the center of circle of arcuate structure corresponds to ring（1）Axis centrifugation set.
5. 5. heart coronary artery support according to claim 4, it is characterised in that the elastomer（23）Central angle not More than 30 degree and not less than 5 degree, radius is not less than 5mm, and is not more than 30mm.
6. 6. heart coronary artery support according to claim 1 or 2, it is characterised in that the connector is wrapping ring body Interface（21）.
7. 7. heart coronary artery support according to claim 1 or 2, it is characterised in that the connector is jaw, the pincers Two tong arms of mouth（25）For elastomer, mouth is the importing mouth with approaching face（26）.