CN1977778B - Vascular stent - Google Patents
Vascular stent Download PDFInfo
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- CN1977778B CN1977778B CN 200510111307 CN200510111307A CN1977778B CN 1977778 B CN1977778 B CN 1977778B CN 200510111307 CN200510111307 CN 200510111307 CN 200510111307 A CN200510111307 A CN 200510111307A CN 1977778 B CN1977778 B CN 1977778B
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Abstract
本发明提供了一种血管支架，该支架由弹性金属管材镂刻而成，支架包含多个沿轴向排列的由椭圆形基本单元组成的网环，各相邻网环之间通过多个倾斜的S形连接件相连。本发明血管支架在扩张后既能保持较高的径向支撑力，又有很好的轴向柔顺性和血管顺应性，轴向缩短率很小，金属表面覆盖率适中。整个支架各组成部分均匀对称，减少了支架各部分在膨胀过程中绕支架轴向发生相对旋转的可能性。
The invention provides a vascular stent, the stent is engraved from an elastic metal pipe, the stent includes a plurality of mesh rings arranged in the axial direction and composed of elliptical basic units, and a plurality of inclined mesh rings are passed between adjacent mesh rings. The S-shaped connectors are connected. The blood vessel stent of the present invention can not only maintain a high radial support force after expansion, but also have good axial flexibility and blood vessel compliance, the axial shortening rate is small, and the metal surface coverage rate is moderate. The components of the whole stent are uniform and symmetrical, which reduces the possibility of relative rotation of each part of the stent around the stent axis during the expansion process.
Description
技术领域technical field
本发明涉及一种医疗器械，特别涉及一种适用于人体血管介入治疗领域中的血管支架。The invention relates to a medical device, in particular to a blood vessel stent suitable for the field of human blood vessel interventional treatment.
背景技术Background technique
经皮穿刺血管成形术，简称PTA术，是在医学影像设备的导引下，利用穿刺针、导丝和导引鞘把套有紧缩的支架的球囊导管插进人体血管，并输送到血管狭窄处，随球囊的扩张，支架也被撑开，球囊收缩回撤后，产生塑性变形的金属支架则留在原地，并嵌入了血管，起到扩张血管的作用。此方法使得手术的长期疗效好。Percutaneous puncture angioplasty, referred to as PTA, is under the guidance of medical imaging equipment, using a puncture needle, a guide wire and a guide sheath to insert a balloon catheter with a tightened stent into a human blood vessel and deliver it to the blood vessel At the stenosis, with the expansion of the balloon, the stent is also stretched. After the balloon is retracted and retracted, the plastically deformed metal stent remains in place and is embedded in the blood vessel, playing the role of dilating the blood vessel. This approach leads to good long-term outcomes of the surgery.
从临床使用的角度出发，一种理想的血管支架设计要同时具有以下技术指标：足够的径向支撑力，好的轴向柔顺性，小的径向反弹比和轴向缩短率，适中(10％-20％)的金属空间占有面积比等。由于这些技术指标在支架结构设计上的互相制约性，使得现有支架设计很难在这些方面达到有效的统一。From the perspective of clinical use, an ideal vascular stent design should have the following technical indicators at the same time: sufficient radial support force, good axial compliance, small radial rebound ratio and axial shortening rate, moderate (10 %-20%) metal space occupation area ratio, etc. Due to the mutual restriction of these technical indicators in the design of the stent structure, it is difficult to effectively unify the existing stent designs in these aspects.
现有技术的血管支架形式有多种，它们各有特色，其目的都是要提高支架的径向支撑强度和轴向柔软性等功能。但现有支架因其结构上的局限性，在这两个方面很难达到有效的统一，有些支架扩张后虽然支撑力较强，但轴向柔软性欠佳，且金属表面覆盖率和轴向的缩短率较大；有些支架虽轴向柔软性较好，但径向支撑力不足，金属表面覆盖率较小，容易引起血管再狭窄，故仍有待进一步提高。There are many forms of vascular stents in the prior art, each of which has its own characteristics, and the purpose of which is to improve the radial support strength and axial flexibility of the stent. However, due to the limitations of the structure of the existing stents, it is difficult to achieve effective unity in these two aspects. Although some stents have strong supporting force after expansion, the axial flexibility is not good, and the metal surface coverage and axial The shortening rate is relatively large; some stents have good axial flexibility, but the radial support force is insufficient, the metal surface coverage is small, and it is easy to cause vascular restenosis, so it still needs to be further improved.
发明内容Contents of the invention
本发明的目的，在于提供一种在扩张后既能保持较高的径向支撑力又有很好的轴向柔顺性和血管顺应性、轴向缩短率很小、金属表面覆盖率适中的血管支架。The purpose of the present invention is to provide a blood vessel that can maintain a high radial support force after expansion, has good axial compliance and blood vessel compliance, has a small axial shortening rate, and has a moderate metal surface coverage stand.
本发明的目的是通过以下技术方案实现的：一种血管支架，由弹性金属管材镂刻而成，所述的支架包含多个沿轴向排列的由椭圆形基本单元组成的网环，各相邻网环之间通过多个倾斜的S形连接件相连。The purpose of the present invention is achieved through the following technical solutions: a vascular stent, which is carved from elastic metal pipes, and the stent includes a plurality of mesh rings arranged in the axial direction and composed of elliptical basic units, each adjacent The mesh rings are connected by multiple inclined S-shaped connectors.
所述的组成网环的各椭圆形基本单元沿椭圆的短径方向相连，所述的网环与网环之间按照椭圆形基本单元交错对应的形式排列。The elliptical basic units forming the mesh ring are connected along the short diameter direction of the ellipse, and the mesh rings are arranged in a staggered correspondence form between the elliptical basic units.
所述的S形连接件连接在两相邻网环的两相邻椭圆形基本单元之间，其连接点在椭圆形基本单元的突出点上，连接在同一两相邻椭圆形基本单元之间多个S形连接件的倾斜方向相同，连接在不同两相邻网环之间的多个S形连接件沿轴向交错排列并且倾斜方向交错改变。The S-shaped connector is connected between two adjacent elliptical basic units of two adjacent mesh rings, and its connection point is on the protruding point of the elliptical basic unit, and is connected between the same two adjacent elliptical basic units The inclination directions of the plurality of S-shaped connectors are the same, and the plurality of S-shaped connectors connected between different two adjacent net rings are arranged staggeredly along the axial direction and the inclination directions are alternately changed.
所述的椭圆形基本单元的长径与短径之比为3∶2。The ratio of the major diameter to the minor diameter of the elliptical basic unit is 3:2.
所述的组成网环的椭圆形基本单元为6个，所述的连接在相邻网环之间的S形连接件为两个，两个S形连接件均匀间隔设置在两相邻网环之间。There are 6 elliptical basic units forming the mesh ring, and there are two S-shaped connectors connected between adjacent mesh rings, and the two S-shaped connectors are evenly spaced between two adjacent mesh rings. between.
所述的组成网环的椭圆形基本单元为6个，所述的连接在相邻网环之间的S形连接件为3个，3个S形连接件均匀间隔设置在两相邻网环之间。There are 6 elliptical basic units that make up the mesh ring, and there are 3 S-shaped connectors connected between adjacent mesh rings, and the 3 S-shaped connectors are evenly spaced between two adjacent mesh rings. between.
所述的组成网环的椭圆形基本单元为8个，所述的连接在相邻网环之间的S形连接件为两个，两个S形连接件均匀间隔设置在两相邻网环之间。There are 8 elliptical basic units forming the mesh ring, and there are two S-shaped connectors connected between adjacent mesh rings, and the two S-shaped connectors are evenly spaced between two adjacent mesh rings. between.
所述的组成网环的椭圆形基本单元为8个，所述的连接在相邻网环之间的S形连接件为4个，4个S形连接件均匀间隔设置在两相邻网环之间。There are 8 elliptical basic units that make up the mesh ring, and there are 4 S-shaped connectors connected between adjacent mesh rings, and the 4 S-shaped connectors are evenly spaced between two adjacent mesh rings. between.
本发明血管支架由于采用了以上技术方案，使得支架在扩张后既能保持较高的径向支撑力，又有很好的轴向柔顺性和血管顺应性，轴向缩短率很小，金属表面覆盖率适中。整个支架各组成部分均匀对称，减少了支架各部分在膨胀过程中绕支架轴向发生相对旋转的可能性。Because the vascular stent of the present invention adopts the above technical scheme, the stent can not only maintain a high radial support force after expansion, but also have good axial flexibility and blood vessel compliance, and the axial shortening rate is very small, and the metal surface Medium coverage. The components of the whole stent are uniform and symmetrical, which reduces the possibility of relative rotation of each part of the stent around the stent axis during the expansion process.
附图说明Description of drawings
图1为本发明血管支架的结构展开示意图。Fig. 1 is a schematic diagram of the structure development of the vascular stent of the present invention.
具体实施方式Detailed ways
参见图1，本发明的血管支架，由弹性金属管材镂刻而成，该支架包含多个沿轴向排列的由椭圆形基本单元11组成的网环1，各相邻网环之间通过多个倾斜的S形连接件2相连。椭圆形基本单元11的长径与短径之比为3∶2，组成网环1的各椭圆形基本单元11沿椭圆的短径方向相连，在整个支架中，网环与网环之间按照椭圆形基本单元交错对应的形式排列。S形连接件2连接在两相邻网环1的两相邻椭圆形基本单元11之间，其连接点在椭圆形基本单元的突出点上，在整个支架中，连接在同一两相邻椭圆形基本单元之间多个S形连接件2的倾斜方向相同，连接在不同两相邻网环之间的多个S形连接件2沿轴向交错排列并且倾斜方向交错改变。Referring to Fig. 1, the vascular stent of the present invention is carved from an elastic metal tube, and the stent includes a plurality of mesh rings 1 composed of elliptical basic units 11 arranged in the axial direction, and a plurality of mesh rings are passed between adjacent mesh rings. The inclined S-shaped connectors 2 are connected. The ratio of the long diameter and the short diameter of the elliptical basic unit 11 is 3: 2, and each elliptical basic unit 11 that forms the mesh ring 1 is connected along the short diameter direction of the ellipse. The elliptical basic units are arranged in a staggered and corresponding form. The S-shaped connector 2 is connected between two adjacent elliptical basic units 11 of two adjacent mesh rings 1, and its connection point is on the protruding point of the elliptical basic unit. The inclination directions of the multiple S-shaped connectors 2 between the basic units are the same, and the multiple S-shaped connectors 2 connected between different two adjacent net rings are arranged staggeredly along the axial direction and the inclination directions are alternately changed.
本发明的血管支架，可以由6个椭圆形基本单元组成网环，在各相邻网环之间均匀间隔连接两个或3个S形连接件，两个或3个S形连接件均匀间隔设置在两相邻网环之间。整个支架可由6-10个网环通过S形连接件连接构成，一个支架内的具体网环数根据需要决定。The vascular stent of the present invention can be composed of 6 elliptical basic units to form a mesh ring, and two or three S-shaped connectors are evenly spaced between each adjacent mesh ring, and the two or three S-shaped connectors are evenly spaced It is set between two adjacent network rings. The whole bracket can be composed of 6-10 mesh rings connected by S-shaped connectors, and the specific number of mesh rings in a bracket is determined according to needs.
本发明的血管支架，还可以由8个椭圆形基本单元组成网环，在各相邻网环之间均匀间隔连接两个或4个S形连接件，两个或4个S形连接件均匀间隔设置在两相邻网环之间。整个支架可由6-10个网环通过S形连接件连接构成，一个支架内的具体网环数根据需要决定。The vascular stent of the present invention can also be composed of 8 elliptical basic units to form a mesh ring, and two or 4 S-shaped connectors are evenly spaced between each adjacent mesh ring, and the two or 4 S-shaped connectors are evenly spaced. The interval is set between two adjacent mesh rings. The whole bracket can be composed of 6-10 mesh rings connected by S-shaped connectors, and the specific number of mesh rings in a bracket is determined according to needs.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510111307 CN1977778B (en) | 2005-12-08 | 2005-12-08 | Vascular stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510111307 CN1977778B (en) | 2005-12-08 | 2005-12-08 | Vascular stent |
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| Publication Number | Publication Date |
|---|---|
| CN1977778A CN1977778A (en) | 2007-06-13 |
| CN1977778B true CN1977778B (en) | 2011-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510111307 Expired - Lifetime CN1977778B (en) | 2005-12-08 | 2005-12-08 | Vascular stent |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102657564B (en) * | 2012-05-10 | 2014-11-12 | 大连理工大学 | Biodegradable vascular scaffold |
| CN104127266A (en) * | 2014-06-16 | 2014-11-05 | 苏州固基电子科技有限公司 | Drug-loading vascular stent |
| CN104127269B (en) * | 2014-06-16 | 2017-01-18 | 苏州固基电子科技有限公司 | Vascular stent |
| CN104127268A (en) * | 2014-06-16 | 2014-11-05 | 苏州固基电子科技有限公司 | Vascular stent firm in supporting |
| CN104998342A (en) * | 2015-07-22 | 2015-10-28 | 严聪颖 | Medicine-carrying slow release apparatus for uterus, and implantation method thereof |
| CN105796218A (en) * | 2016-03-08 | 2016-07-27 | 黄连军 | Covered stent |
| CN106618821B (en) * | 2017-01-06 | 2018-03-20 | 青岛市第三人民医院 | A kind of intravascular stent for preventing reangiostenosis and preparation method thereof |
| CN106580528A (en) * | 2017-02-04 | 2017-04-26 | 成都鼎信致远科技有限公司 | Coronary stent for preventing restenosis |
| CN115568990A (en) * | 2022-08-08 | 2023-01-06 | 江苏大学 | Vascular stent with axial zero Poisson ratio structure |
| CN118267201B (en) * | 2024-03-18 | 2025-01-28 | 南京鼓楼医院 | A stable anti-displacement heart stent |
| CN118717378A (en) * | 2024-08-12 | 2024-10-01 | 太原理工大学 | A vascular stent suitable for lower limb arteries |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6264685B1 (en) * | 1999-07-06 | 2001-07-24 | Datascope Investment Corp. | Flexible high radial strength stent |
| CN2502717Y (en) * | 2001-12-10 | 2002-07-31 | 董何彦 | Wave-shape coronary metal frame |
| CN2577878Y (en) * | 2002-10-18 | 2003-10-08 | 贾国良 | Magnetic vascular internal stents |
| CN2695012Y (en) * | 2004-04-02 | 2005-04-27 | 北京美中双和医疗器械有限公司 | Lattice type blood resel dilator |
| CN1688264A (en) * | 2002-07-31 | 2005-10-26 | 尤尼森治疗学股份有限公司 | Flexible and conformable stent and method of forming same |
-
2005
- 2005-12-08 CN CN 200510111307 patent/CN1977778B/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6264685B1 (en) * | 1999-07-06 | 2001-07-24 | Datascope Investment Corp. | Flexible high radial strength stent |
| CN2502717Y (en) * | 2001-12-10 | 2002-07-31 | 董何彦 | Wave-shape coronary metal frame |
| CN1688264A (en) * | 2002-07-31 | 2005-10-26 | 尤尼森治疗学股份有限公司 | Flexible and conformable stent and method of forming same |
| CN2577878Y (en) * | 2002-10-18 | 2003-10-08 | 贾国良 | Magnetic vascular internal stents |
| CN2695012Y (en) * | 2004-04-02 | 2005-04-27 | 北京美中双和医疗器械有限公司 | Lattice type blood resel dilator |
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| CN1977778A (en) | 2007-06-13 |
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Owner name: SHANGHAI KINDLY ENTERPRISE DEVELOPMENT GROUP CO., Free format text: FORMER NAME: SHANGHAI KANGDELAI ENTERPRISE DEVELOPMENT GROUP CO., LTD. |
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