技术领域technical field
本发明涉及一种心血管，具体是心血管中的管状动脉支架。The invention relates to a cardiovascular, in particular to a tubular arterial stent in the cardiovascular.
背景技术Background technique
血管支架广泛的应用于介入手术中，尤其在心脏介入手术中，例如心脏支架（Stent），主要用于冠状动脉的介入治疗，因此又称为冠状动脉支架，主要用于疏通冠状动脉血管。Vascular stents are widely used in interventional surgery, especially in cardiac interventional surgery, such as heart stent (Stent), which is mainly used for coronary artery interventional treatment, so it is also called coronary artery stent, mainly used to dredge coronary arteries.
目前所使用的冠状动脉支架主要有金属支架、镀膜支架和可溶性支架，其中可溶性支架在机械结构上与金属支架类似，只不过能够为肌体所吸收而溶解，在本发明中，所涉及的内容主要是心脏冠状动脉支架的结构，因而对其是否具有可溶性不做说明。镀膜支架则是在金属支架外附着一层膜，用于提高生物相容性，还可以结合药物，用于抑制例如疤痕组织在支架周围的生长。Currently used coronary stents mainly include metal stents, coated stents and soluble stents, wherein soluble stents are similar to metal stents in mechanical structure, but can be absorbed and dissolved by the body. In the present invention, the content involved is mainly It is the structure of the heart coronary artery stent, so whether it is soluble or not is not stated. Coated stents attach a layer of film to the outside of the metal stent to improve biocompatibility, and can also be combined with drugs to inhibit, for example, the growth of scar tissue around the stent.
从以上内容可知，由于身体的排异反应以及血管切开后必然要缝合进而血管塑形愈合，例如疤痕组织增生会使的金属支架失去作用，甚至造成动脉重新变得狭窄，甚至堵塞，因而需要进行二次手术，以取出支架。From the above content, it can be known that due to the body's rejection reaction and the necessity of suturing the blood vessels after incision, for example, the hyperplasia of scar tissue will cause the metal stent to lose its effect, and even cause the artery to become narrowed or even blocked again. Therefore, it is necessary to A second surgery is performed to remove the stent.
当然支架的放入往往需要借助于球囊，一方面，利用球囊的充放气形成胀形撑开血管的狭窄部分，另一方面，缩小状态则有利于其在血管内的探入。相应地，金属支架在球囊胀形状态下放置到位。Of course, the placement of the stent often requires the help of a balloon. On the one hand, the inflation and deflation of the balloon forms a bulging shape to expand the narrow part of the blood vessel. On the other hand, the narrowed state is conducive to its penetration into the blood vessel. Accordingly, the metal stent is placed in place in the balloon-inflated state.
金属支架放入容易取出困难，金属支架放置一段时间后，通过手术切开血管，需要将紧贴血管壁的金属支架剥离。由于金属支架通常是金属筒镂刻而成，筒面由金属丝线形成，剥离金属支架时，可能会导致金属支架的破碎，造成处于切开部位的异物清理困难，并会对血管产生比较大的附加损伤。The metal stent is easy to put in and difficult to take out. After the metal stent is placed for a period of time, the blood vessel is cut through surgery, and the metal stent that is close to the blood vessel wall needs to be peeled off. Since the metal stent is usually engraved from a metal cylinder, and the surface of the cylinder is formed by a metal wire, when the metal stent is peeled off, the metal stent may be broken, making it difficult to clean the foreign matter at the incision site, and causing relatively large additional damage to the blood vessel. damage.
例如Z型支架，Z型支架所形成的金属丝非常细小，连接结构锐利，有时使得导丝通过支架空隙进入分支是非常困难的。此外Z型支架往往一支比较长的原管，切出一段用于病变部位的支撑，下料后，其两端会留有比较尖锐的结构，对支架的放入和取出都是非常不利的。For example, the Z-shaped stent, the metal wire formed by the Z-shaped stent is very small, and the connection structure is sharp, which sometimes makes it very difficult for the guide wire to enter the branch through the gap of the stent. In addition, the Z-shaped stent is often a relatively long original tube, and a section is cut out to support the lesion. After cutting, there will be relatively sharp structures at both ends, which is very unfavorable for the insertion and removal of the stent. .
再如环形支架，环形支架的环并非圆环，而是由梯形脉冲波形的结构构成的环，环之间需要设置连接体，通常连接体一般也是波形单元，其整体上可以理解为是由波形单元构成环并由波形单元进行环的连接所形成，结构复杂，且整体上由于其仍然是通过金属筒镂刻而成，加工难度相对比较大，且若从整体上截取一段的难度也会比较大。此外该类支架的膨胀范围受波形单元的波长限制，且轴向弯曲性能欠佳。Another example is the ring stent. The ring of the ring stent is not a ring, but a ring composed of a trapezoidal pulse waveform structure. Connectors need to be set between the rings. Usually, the connectors are generally waveform units, which can be understood as a whole. The units form a ring and are formed by connecting the rings with wave-shaped units. The structure is complex, and because it is still engraved by a metal cylinder as a whole, it is relatively difficult to process, and it is also more difficult to cut a section from the whole. . In addition, the expansion range of this type of stent is limited by the wavelength of the wave unit, and the axial bending performance is not good.
发明内容Contents of the invention
为此，本发明的目的在于提供一种加工难度较低，但使用效果良好的心脏冠状动脉支架。For this reason, the object of the present invention is to provide a heart coronary artery stent with low processing difficulty but good application effect.
本发明采用以下技术方案：The present invention adopts following technical scheme:
一种心脏冠状动脉支架，包括：A heart coronary stent comprising:
环，有多个，且该环的两端为圆环构成的端环体，端环体间沿环的周向分布有多个连接筋；There are multiple rings, and the two ends of the ring are end ring bodies composed of circular rings, and a plurality of connecting ribs are distributed along the circumference of the ring between the end ring bodies;
连接体，该连接体包括一个线性的弹性体和设置在该弹性体两端的各一个连接头，该连接头与相应端的端环体的环体扣接，以用于多个环的顺次连接。Connecting body, which includes a linear elastic body and a connecting head arranged at both ends of the elastic body, and the connecting head is fastened with the ring body of the end ring body at the corresponding end, so as to be used for sequential connection of multiple rings .
上述心脏冠状动脉支架，在一些实施例中，所述环周向为连接筋所分割，形成框的以环的轴线为轴的环形阵列；For the aforementioned coronary artery stent, in some embodiments, the circumference of the ring is divided by the connecting ribs, forming an annular array of the frame with the axis of the ring as the axis;
其中相邻两框不同：其一框内连接筋的间距大于另一框内连接筋的间距。The two adjacent frames are different: the spacing of the connecting ribs in one frame is greater than the spacing of the connecting ribs in the other frame.
可选地，间距较大的框内设有连接图案，该连接图案与框的四个边均有连接。Optionally, a connection pattern is provided in the frame with a relatively large distance, and the connection pattern is connected to all four sides of the frame.
可选地，所述连接图案为菱形框，该菱形框的四个顶点分别与间距较大的框的四个边连接。Optionally, the connection pattern is a rhombus frame, and the four vertices of the rhombus frame are respectively connected to the four sides of the frame with relatively large distances.
可选地，所述环的轴向长度为3mm~5mm。Optionally, the axial length of the ring is 3 mm to 5 mm.
可选地，所述环的壁厚为0.1016mm~0.1270mm。Optionally, the wall thickness of the ring is 0.1016mm-0.1270mm.
可选地，所述弹性体为弧形结构，且弧形结构的圆心相应于环的轴线离心设置。Optionally, the elastic body is an arc structure, and the center of the arc structure is set centrifugally corresponding to the axis of the ring.
可选地，所述弹性体的圆心角不大于30度且不小于5度，半径不小于5mm，且不大于30mm。Optionally, the central angle of the elastic body is not greater than 30 degrees and not less than 5 degrees, and the radius is not less than 5 mm and not greater than 30 mm.
可选地，所述连接头为包绕环体的接口。Optionally, the connector is an interface surrounding the ring.
可选地，所述连接头为钳嘴，该钳嘴的两个钳臂为弹性体，嘴头为带导入面的导入嘴。Optionally, the connecting head is a pliers mouth, the two pliers arms of the pliers mouth are elastic bodies, and the mouth head is an introduction mouth with an introduction surface.
依据本发明，所采用的血管支架的主体结构不是现有的通过在金属圆管上镂刻而成的结构，换言之，本发明采用分体制造，顺次连接而成的结构，因此，当需要截取一段血管支架时，通过拆除环间的连接体即可，拆除后的连接体的端部为环体结构，表面平整光滑，从而可以保证有比较好的使用效果。同时，环和连接体分别制造，然后连接，可以根据需要制成长度不同的总成，制造更直接方便，尤其是连接体直接采用扣接结构，不仅方便连接，而且也方便拆除，制造工艺简单，从而在放支架部位产生病变时，也容易取出支架。According to the present invention, the main structure of the vascular stent used is not the existing structure formed by engraving on the metal round tube. For a section of vascular stent, it is enough to remove the connecting body between the rings. The end of the removed connecting body is a ring structure with a flat and smooth surface, which can ensure a better use effect. At the same time, the ring and the connecting body are manufactured separately and then connected, and can be made into assemblies of different lengths according to needs, which is more direct and convenient to manufacture, especially the connecting body directly adopts a buckle structure, which is not only convenient for connection, but also convenient for disassembly, and the manufacturing process is simple , so that when a lesion occurs at the place where the stent is placed, it is also easy to take out the stent.
附图说明Description of drawings
图1为依据本发明的一种心脏冠状动脉支架的结构原理图。Fig. 1 is a structural principle diagram of a heart coronary stent according to the present invention.
图2为一种环的结构示意图。Fig. 2 is a schematic structural diagram of a ring.
图3为一种连接体结构示意图。Fig. 3 is a schematic diagram of a linker structure.
图4为另一种连接体结构示意图。Fig. 4 is a schematic diagram of another linker structure.
图中：1.环，2.连接体。In the figure: 1. Ring, 2. Connector.
11.端环体，12.连接筋，13.矩形框，14.连接图案，15.连接头，16.连接头。11. End ring body, 12. Connecting rib, 13. Rectangular frame, 14. Connection pattern, 15. Connecting head, 16. Connecting head.
21.接扣，22.扣嘴，23.弹性体，24.过渡体，25.钳臂，26.导入嘴。21. Connect buckle, 22. Buckle mouth, 23. Elastic body, 24. Transition body, 25. Clamp arm, 26. Lead-in mouth.
具体实施方式Detailed ways
参照说明书附图1，图1中是血管支架的总成状态，其整体上是一个圆筒结构，或者近似圆筒的结构，由于连接体2为弹性体，因而其自身具有可被弯折的能力，适应不同血管部位的生理结构。Referring to accompanying drawing 1 of the specification, in Fig. 1 is the assembly state of the vascular stent, which is a cylindrical structure as a whole, or a structure similar to a cylindrical one. Since the connecting body 2 is an elastic body, it has its own bendable Ability to adapt to the physiological structure of different vascular sites.
如果将心脏冠状动脉支架整体上看成是一个柱体，那么以离心和向心应为本领域的技术人员所理解。If the heart coronary stent is regarded as a cylinder as a whole, the centrifugal and centripetal should be understood by those skilled in the art.
同时，环1所限定的基础结构匹配有轴、环，从而周向、轴向应为本领域的技术人员所理解。At the same time, the basic structure defined by the ring 1 is matched with a shaft, a ring, so that the circumferential direction and the axial direction should be understood by those skilled in the art.
参见说明书附图1，图中所示的一种心脏冠状动脉支架（下文简称血管支架），其基本结构应当包括以下结构：Referring to the accompanying drawing 1 of the specification, a heart coronary artery stent (hereinafter referred to as a vascular stent) shown in the figure, its basic structure should include the following structures:
环1，图中有11个，可见的，环1为基础单元，根据需要可以通过顺次的连接获得不同长度的心脏冠状动脉支架。There are 11 rings 1 in the figure. It can be seen that ring 1 is the basic unit, and coronary artery stents of different lengths can be obtained through sequential connections as required.
用以连接的是连接体2，图3和图4中示出了两种连接体2，连接体2的用量至少为2个，一般选择2~4个，均置在环的周围。Connectors 2 are used for connection. Two kinds of connectors 2 are shown in Figure 3 and Figure 4. The amount of connectors 2 used is at least 2, generally 2 to 4 are selected, and they are all placed around the ring.
由于血管收缩或者扩张能够使血管支架处于被相对固定的位置，因而，环1之间的连接体2主要用来保持环1之间的距离，呈现一种简单的环间支撑作用，而不强调其对血管的支撑作用。对血管起支撑作用的是环1，环1需要具备一定的机械强度，可见的，对于血管支架机械强度的设计属于本领域的常规设计，在此不再赘述。Since vasoconstriction or expansion can make the vascular stent in a relatively fixed position, the connecting body 2 between the rings 1 is mainly used to maintain the distance between the rings 1, showing a simple inter-ring support function, without emphasizing It supports blood vessels. It is the ring 1 that supports the blood vessel. The ring 1 needs to have a certain mechanical strength. It can be seen that the design of the mechanical strength of the vascular stent belongs to the conventional design in the field, and will not be repeated here.
环1不是简单的几何意义上的圆环，每一个环1如图2所示，实质包含两个圆环，即图2中所示的端环体11，端环体11是环1作为支撑件的主支撑结构。The ring 1 is not a simple geometric ring. Each ring 1, as shown in FIG. 2, essentially contains two rings, namely the end ring body 11 shown in FIG. The main supporting structure of the piece.
两个端环体11构成环1的两端，还需要其他结构体构成环壁，图中环壁的基础结构是连接筋12。The two end ring bodies 11 constitute the two ends of the ring 1 , and other structures are required to form the ring wall. The basic structure of the ring wall in the figure is the connecting rib 12 .
环1采用一个相对较小的圆筒通过镂刻工艺镂刻而成。Ring 1 is engraved using a relatively small cylinder through the engraving process.
关于端环体11，如图2所示，端环体11的端面做圆角处理，如果把端环体11看成是一个圆环，那么其环身的截面在端面侧最好是半圆形，从而不会形成锐形边。Regarding the end ring body 11, as shown in Figure 2, the end face of the end ring body 11 is rounded. If the end ring body 11 is regarded as a ring, the cross section of the ring body is preferably a semicircle on the end face side. shape so that no sharp edges are formed.
自然，如果镂刻工艺允许，环身的截面最好是圆形。Naturally, if the engraving process allows, the cross-section of the ring body is preferably circular.
由于端环体11起到主要的支撑作用，那么一定程度上降低了连接筋12的支撑作用，但应当理解，如果连接筋12的支撑强度过低，会消弱环1的整体刚度，而无法使两个端环体11保持较佳的平行状态。Since the end ring body 11 plays a major supporting role, the supporting effect of the connecting rib 12 is reduced to a certain extent, but it should be understood that if the supporting strength of the connecting rib 12 is too low, the overall rigidity of the ring 1 will be weakened, so that it cannot Keep the two end ring bodies 11 in a better parallel state.
连接筋12的数量至少为6个，连接筋12的宽度不小于环身截面半径（截面为圆形，端面侧为半圆的状态时）的三分之一，但不宜大于环身截面半径的两倍，即直径。The number of connecting ribs 12 is at least 6, and the width of the connecting ribs 12 is not less than one-third of the radius of the section of the ring body (when the section is circular and the end face side is a semicircle), but it should not be greater than two times the radius of the section of the ring body. times, the diameter.
连接筋12的数量不宜多于20个，否则会影响环1的避免空隙。The number of connecting ribs 12 should not be more than 20, otherwise the avoidance gap of the ring 1 will be affected.
处于同一基体镂刻的需要，连接筋12在环壁方向的厚度与端环体一致。In order to be engraved on the same base body, the thickness of the connecting rib 12 in the direction of the ring wall is consistent with that of the end ring body.
基于前述的结构，连接体2的配置数量较少，相对于已知的心脏冠状动脉支架，其侧向空隙比较大，从而能够适应绝大多数的分叉病变。Based on the aforementioned structure, the number of configurations of the connecting body 2 is small, and compared with known coronary artery stents, its lateral gap is relatively large, so that it can adapt to most bifurcation lesions.
此外连接体2部分具有比较大的置药空间，从而有利于置药，用以抗排异或者治疗病变部位。In addition, the linker 2 has a relatively large space for drug placement, which facilitates drug placement for anti-rejection or treatment of lesions.
可以理解的，基于上述结构的血管支架可以进行覆膜，满足覆膜所需要的基础结构，因而可以构造为覆膜支架。It can be understood that the vascular stent based on the above structure can be coated to meet the basic structure required by the coating, and thus can be configured as a covered stent.
可以理解的，基于上述结构的血管支架还可以采用相应材质的材料制作成为在血液中可降解的血管支架，即可溶性支架。It can be understood that the vascular stent based on the above structure can also be made into a vascular stent degradable in blood, that is, a soluble stent, using materials of corresponding materials.
显而易见的是，无论哪种血管支架，其自身都会具有相当的弹性和可折弯性能，而在本申请中强调例如连接体2中的弹性体23的弹性属性时而受到选材上的限制，显然，现有的血管支架材质均可满足弹性体23的弹性要求。It is obvious that no matter what kind of vascular stent itself, it will have considerable elasticity and bendability, but in this application, for example, the elastic properties of the elastic body 23 in the connector 2 are limited by material selection. Obviously, The existing vascular stent materials can all meet the elastic requirements of the elastic body 23 .
图2所示的结构中，环1的端环体11具有良好的圆弧形端面，从而放入和取出都不会对人体产生太大的伤害。In the structure shown in FIG. 2 , the end ring body 11 of the ring 1 has a good arc-shaped end surface, so putting it in and taking it out will not cause too much harm to the human body.
图3和图4中示出了两种连接体的结构，图中的连接头，例如接扣21，可以在需要特定的血管支架长度是，打开连接头，截取所需要的血管支架长度。Figures 3 and 4 show the structures of the two connecting bodies. The connecting head in the figure, such as the buckle 21, can be opened to cut off the required length of the vascular stent when a specific length of the vascular stent is required.
连接头的去除不会损伤端环体11，在本发明的实施例中，连接体2近乎于丝线粗细，连接强度相对较弱，使用尖锐的工具，甚至是针头就容易调开连接头与端环体11的连接。该种连接强度可以满足环1的连接强度。The removal of the connecting head will not damage the end ring body 11. In the embodiment of the present invention, the connecting body 2 is close to the thickness of a silk thread, and the connection strength is relatively weak. It is easy to adjust the connecting head and the end ring body by using a sharp tool or even a needle. The connection of ring body 11. This connection strength can meet the connection strength of the ring 1 .
进而，连接体2采用与环1一样的材质，构造为金属支架时，优选镍钛合金、钴镍合金或者生物相容性比较好的金属或者合金。此类金属尽管属于屈服强度比较高的金属或者合金，但处于比较轻薄的状态时，使用尖端能够割断或者挑断。例如不锈钢材质的金属支架，其笼型网面上的金属丝非常细小，从而在取出支架时容易造成金属丝的断掉，可以预见的是，对于截取一定长度的基于上述结构的血管支架时，并不需要特定的工具。Furthermore, the connector 2 is made of the same material as the ring 1, and when it is constructed as a metal stent, it is preferably nickel-titanium alloy, cobalt-nickel alloy, or a metal or alloy with better biocompatibility. Although such metals are metals or alloys with relatively high yield strength, they can be cut or broken with a sharp point when they are in a relatively thin state. For example, the metal stent made of stainless steel, the metal wire on the cage mesh surface is very small, so it is easy to cause the wire to break when the stent is taken out. It is foreseeable that when cutting a certain length of vascular stent based on the above structure, No specific tools are required.
同时，可以预见的是，相比于整体金属管镂刻而成的血管支架，截取后，端环体11构成端面，平滑，而不像现有的血管支架截取后，被切断的金属丝具有锐利的断口。At the same time, it is foreseeable that, compared with the vascular stent carved from the integral metal tube, after cutting, the end ring body 11 forms an end face, which is smooth, unlike the existing vascular stent, where the cut metal wire has a sharp edge. of the fracture.
环1作为基本单元可以批量生产，同样，连接体2也可以批量生产，环1起支撑作用，整体上减少了金属的用量，从而可以有效的降低生产成本。The ring 1 as a basic unit can be mass-produced, and similarly, the connecting body 2 can also be mass-produced. The ring 1 acts as a support, reducing the amount of metal used as a whole, thereby effectively reducing the production cost.
目前血管支架的价格非常昂贵，尽管含有医药领域公知的原因，但也与其加工方式和使用材料有关。At present, the price of vascular stents is very expensive. Although there are well-known reasons in the medical field, it is also related to its processing methods and materials used.
连接体2的引入，减少了整体的雕刻量和金属圆筒的整体用量，并对支撑作用影响较小。The introduction of the connecting body 2 reduces the overall engraving amount and the overall amount of the metal cylinder, and has little impact on the supporting effect.
在图2所示的结构中，两个端环体11之间分布有较多的连接筋12，或者说所述环1周向为连接筋12所分割，形成框的以环1的轴线为轴的环形阵列，每一个框可以理解为由相邻的两个连接筋12和两个连接筋12之间的两段端环体11的圆弧构成的四边框体结构，忽略圆弧的弧度，等效为矩形框，如图2中所示的矩形框13。In the structure shown in Figure 2, there are more connecting ribs 12 distributed between the two end ring bodies 11, or the circumferential direction of the ring 1 is divided by the connecting ribs 12, forming a frame with the axis of the ring 1 as An annular array of shafts, each frame can be understood as a quadrangular frame structure composed of two adjacent connecting ribs 12 and the arcs of the two end rings 11 between the two connecting ribs 12, ignoring the radians of the arcs , which is equivalent to a rectangular frame, such as the rectangular frame 13 shown in FIG. 2 .
图2中含有两种矩形框13结构，每两个相邻的矩形框13称为一个单元，所谓的环形阵列是该单元的环形阵列。There are two types of rectangular frame 13 structures in FIG. 2 , and every two adjacent rectangular frames 13 are called a unit, and the so-called circular array is the circular array of the unit.
自然，在一些实施例中，矩形框13可以做成一样的矩形框，基于图2所示的结构，有利于减少加工量，从而降低了加工强度。同时，连接筋12的数量足够，能够保证环1的整体的支撑刚度。Naturally, in some embodiments, the rectangular frame 13 can be made into the same rectangular frame. Based on the structure shown in FIG. 2 , it is beneficial to reduce the amount of processing, thereby reducing the processing intensity. At the same time, the number of connecting ribs 12 is sufficient to ensure the overall support rigidity of the ring 1 .
可以预见的是，已有的血管支架整体的折弯性能体现在其整体的镂刻均匀性上，并为了满足折弯性能的一致性，不得不设计出各种复杂的镂刻图案，大大提高了加工难度。It is foreseeable that the overall bending performance of existing vascular stents is reflected in its overall engraving uniformity, and in order to meet the uniformity of bending performance, various complex engraving patterns have to be designed, which greatly improves the processing efficiency. difficulty.
而在本发明中，折弯性能体现在连接体2上，环1则起到支撑作用，换言之，环1不必考虑折弯性能，而只考虑支撑作用，因而彻底消除了需要平衡折弯性能与支撑作用的矛盾，对环1结构体的设计制造将会变得比较简单，可加工性会非常好。However, in the present invention, the bending performance is reflected on the connecting body 2, and the ring 1 plays a supporting role. Due to the contradiction of the support function, the design and manufacture of the ring 1 structure will become relatively simple, and the machinability will be very good.
可选地，在一个单元内的两个矩形框采用不同的配置，图中矩形框13直接指引的矩形框较窄，结构简单，利于加工。Optionally, the two rectangular frames in one unit adopt different configurations, and the rectangular frame directly directed by the rectangular frame 13 in the figure is narrower and has a simple structure, which is convenient for processing.
而与标号13指引的矩形框相邻的矩形框则采用了较大的间距，可以附属其他结构，例如图中所示的连接图案14，也可以仅仅是矩形框，根据不同矩形框的配置，获得良好的支撑性能。The rectangular frame adjacent to the rectangular frame indicated by the label 13 adopts a larger spacing, and can be attached to other structures, such as the connection pattern 14 shown in the figure, or just a rectangular frame. According to the configuration of different rectangular frames, Get good support performance.
优选地，间距较大的框内设有连接图案14，该连接图案14与框的四个边均有连接。不同于当前的血管支架的镂空图案，在图2所示的结构中，连接图案14主要考虑是提高强度，因而，最好采用三角形结构的连接结构，因此，可加工性远远大于现有的血管支架。Preferably, a connection pattern 14 is provided in the frame with a relatively large distance, and the connection pattern 14 is connected to the four sides of the frame. Different from the hollow pattern of the current vascular stent, in the structure shown in Figure 2, the connection pattern 14 is mainly considered to increase the strength, therefore, it is best to use a connection structure with a triangular structure, so the machinability is far greater than that of the existing Stent.
进而，可以预见的是，为了平衡支撑强度与可折弯性，当前的镂空图案的构造体均是丝线状的，不仅仅是简单的镂空，镂空容易形成棱边分明的结构，从而影响可折弯性，或者说具有棱边结构的结构，例如棱柱体，其各个方向上的可折弯性能并不一样。Furthermore, it is foreseeable that, in order to balance the support strength and bendability, the structure of the current hollow pattern is thread-like, not just a simple hollow, the hollow is easy to form a sharp-edged structure, which affects the foldability. Bending, or structures with edge structures, such as prisms, have different bendability in all directions.
而在图1所示的结构中，由于血管支架的可折弯性由连接体2所体现，因而如图2中所示的连接图案的构造体不必是圆形截面，因而加工难度大大降低。In the structure shown in FIG. 1 , since the bendability of the vascular stent is embodied by the connecting body 2 , the structure of the connecting pattern as shown in FIG. 2 does not have to be a circular cross section, so the processing difficulty is greatly reduced.
优选地，所述连接图案14为菱形框，该菱形框的四个顶点分别与间距较大的框的四个边连接，如图2所示，形成多个三角形结构，从而形成可靠的支撑，而这种连接图案14相对于现有的镂空图案均是简单的直线结构，可加工性非常强。Preferably, the connecting pattern 14 is a rhombus frame, and the four vertices of the rhombus frame are respectively connected to the four sides of the frame with a relatively large distance, as shown in FIG. 2 , forming a plurality of triangular structures, thereby forming a reliable support, Compared with the existing hollow patterns, this connecting pattern 14 is a simple straight line structure, and has very strong machinability.
并且在图2所示的结构中，强调支撑强度，而不必考虑折弯性能，因而所构造的三角形结构在满足侧向间隙一定的条件下，支撑强度比传统镂空图案要大的多。And in the structure shown in Figure 2, the support strength is emphasized without considering the bending performance. Therefore, the support strength of the constructed triangular structure is much greater than that of the traditional hollow pattern under the condition of satisfying a certain lateral gap.
进一步地，所述环1的轴向长度为3mm~5mm，环1的轴向长度不宜过大，否则自身支撑强度比较大的环1会影响血管支架整体的可折弯性能，环1的最长长度不能超过8mm，一般不能超过5mm。Further, the axial length of the ring 1 is 3 mm to 5 mm, and the axial length of the ring 1 should not be too large, otherwise the ring 1 with a relatively strong self-supporting strength will affect the overall bendability of the vascular stent, and the maximum length of the ring 1 The longest length cannot exceed 8mm, and generally cannot exceed 5mm.
环1不宜过短，否则支撑性能无法保证，且可操作性也会变差，即超出人眼的辨析能力。Ring 1 should not be too short, otherwise the supporting performance cannot be guaranteed, and the operability will also deteriorate, that is, beyond the ability of human eyes to distinguish and analyze.
进一步地，所述环1的壁厚为0.1016mm~0.1270mm，比常规的血管支架稍薄，节省材料的条件下，基于前述的结构仍然具备相当的支撑性能，因而具有更好的推广价值。Further, the wall thickness of the ring 1 is 0.1016mm~0.1270mm, which is slightly thinner than conventional vascular stents. Under the condition of material saving, the aforementioned structure still has considerable support performance, so it has better promotion value.
优选地，所述弹性体23为弧形结构，从而，其折弯方向被预先限定，即如果是用环1轴向的正压力，必然会使弧形结构的曲度更大，即其折弯方向是确定的，而不是不可预知的。Preferably, the elastic body 23 is an arc-shaped structure, so its bending direction is pre-defined, that is, if the axial positive pressure of the ring 1 is used, the curvature of the arc-shaped structure will inevitably be greater, that is, its bending The bend direction is deterministic rather than unpredictable.
为此，设定一个可折弯方向，由弧形结构的圆心限定，即相应于环1的轴线离心设置，换言之，即弧形结构向向心侧拱。To this end, a bending direction is set, which is defined by the center of the arc structure, that is, it is set centrifugally corresponding to the axis of the ring 1, in other words, the arc structure arches toward the center.
为避免连接体2对血流的影响，减少其向向心侧拱的深度，所述弹性体23的圆心角不大于30度且不小于5度，半径不小于5mm，且不大于30mm。In order to avoid the impact of the connecting body 2 on the blood flow and reduce the depth of its centripetal side arch, the central angle of the elastic body 23 is not greater than 30 degrees and not less than 5 degrees, and the radius is not less than 5 mm and not greater than 30 mm.
其中圆心角不宜过小，否则折弯方向无法保证，圆心角过大则会使的其拱入向心侧的部分过多。Among them, the central angle should not be too small, otherwise the bending direction cannot be guaranteed, and if the central angle is too large, there will be too much arching into the centripetal side.
在图3所示的结构中，所述连接头为包绕环体的接口21，使用例如针尖，可以从图3中所示的扣嘴22挑开接口21。In the structure shown in FIG. 3 , the connection head is an interface 21 surrounding the ring body, and the interface 21 can be picked apart from the button mouth 22 shown in FIG. 3 by using, for example, a needle point.
包绕结构可以满足所需要的连接强度，同时，也容易操作。The wrapping structure can meet the required connection strength, and at the same time, it is also easy to operate.
在一些实施例中，如图4所示，所述连接头为钳嘴，该钳嘴的两个钳臂25为弹性体，嘴头为带导入面的导入嘴26。即依赖于钳嘴自身的弹性性能进行扣接，结构简单，装配相对比较方便。In some embodiments, as shown in FIG. 4 , the connecting head is a pliers mouth, the two pliers arms 25 of the pliers mouth are elastic bodies, and the mouth head is an introduction mouth 26 with an introduction surface. That is, relying on the elastic properties of the jaw itself for fastening, the structure is simple, and the assembly is relatively convenient.
启开钳臂25则可以从导入嘴26处启开。Open the pincer arm 25 and then can open from the introduction mouth 26 places.
钳臂25的内面可以设置止推面，而不影响从导入嘴26出的启开。The inner surface of the pincer arm 25 can be provided with a thrust surface, without affecting the opening from the introduction mouth 26 .
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610040978.XACN105496604B (en) | 2016-01-22 | 2016-01-22 | Heart coronary artery support |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610040978.XACN105496604B (en) | 2016-01-22 | 2016-01-22 | Heart coronary artery support |
| Publication Number | Publication Date |
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| CN105496604A CN105496604A (en) | 2016-04-20 |
| CN105496604Btrue CN105496604B (en) | 2018-04-06 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610040978.XAExpired - Fee RelatedCN105496604B (en) | 2016-01-22 | 2016-01-22 | Heart coronary artery support |
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