Degradable vascular stent structure with negative Poisson ratio

A technology of vascular stent and negative Poisson's ratio, applied in the field of degradable vascular stent structure, to avoid long-term retention

Active Publication Date: 2019-06-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with non-degradable stents, the structure of degradable stents has its particularity. It is difficult to make the stent structure have negative Poisson's ratio effect under the condition of considering the special structure of degradable stents.

Method used

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  • Degradable vascular stent structure with negative Poisson ratio
  • Degradable vascular stent structure with negative Poisson ratio
  • Degradable vascular stent structure with negative Poisson ratio

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Embodiment Construction

[0019] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] see figure 1 , figure 1 It is a schematic diagram of the concave hexagonal basic structure unit in the negative Poisson's ratio degradable vascular stent structure provided in the present invention. The concave hexagonal structure is formed by the side 1 and the side 2, and the side 3 plays the role of connecting each concave hexagonal basic structure unit along the axial direction of the bracket. Side 1 and side 3 are parallel to the axial direction of the support, and side 2 is in a concave folded state.

[0021] see figure 1 , when side 3 is stretched, side 2 in the concave folded state will gradually open, resulting in a length L Z reduced, length ...

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Abstract

The invention discloses a degradable vascular stent structure with a negative Poisson ratio to make up defects of design of degradable vascular stents in the prior art and belongs to the field of medical equipment. The vascular stent structure is formed by arranging concave hexagonal base structure units in the annular and axial directions of a stent and is made of a degradable material. The vascular stent structure is designed on the specificity of the degradable material and has a negative Poisson ratio effect. A degradable vascular stent with the structure can be matched with the negative Poisson ratio effect of tunica intima tissue after being implanted into blood vessels, so that injury caused by the stent to vascular tissue and the probability of in-stent restenosis are reduced, thestent can be completely degraded in vivo finally, and degradation products of the stent are absorbed and metabolized by the human body.

Description

technical field [0001] The invention relates to a degradable vascular stent structure with a negative Poisson's ratio effect, belonging to the field of medical devices. Background technique [0002] With the aging of society and the acceleration of urbanization, coupled with the prevalence of some unhealthy lifestyles, the morbidity and mortality of cardiovascular diseases in my country are increasing year by year. Coronary heart disease is one of the most common cardiovascular diseases. According to the data of "China Cardiovascular Disease Report", the mortality rate of coronary heart disease in my country was about 111 / 100,000 in 2015, and it is on the rise. It is estimated that there are about 11 million patients with coronary heart disease in my country. [0003] Percutaneous coronary intervention (PCI) has become the main therapy for coronary heart disease. PCI has experienced three revolutionary developments since the 1970s: balloon dilatation, bare metal stents, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07A61F2/82
Inventor 樊瑜波王丽珍高元明王亚伟冯文韬
Owner BEIHANG UNIV
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