Composition for heart stent

Abstract

The invention discloses a composition for a heart stent. The composition for the heart stent comprises the following components in percentages by mass: 0.5-1% of starch, 0.1-0.5% of celluloses, 0.5-1% of alginic acid, 1-2% of chitosan, and the rest of collagen. The heart stent prepared from the composition can be degraded completely.

Description

technical field [0001] The invention relates to a heart stent, in particular to a composition for a heart stent. Background technique [0002] Cardiac stent, also known as coronary artery stent, is a medical device commonly used in cardiac interventional surgery, which has the function of dredging arteries. The main materials are stainless steel, nickel-titanium alloy or cobalt-chromium alloy. It first appeared in the 1980s and experienced the development of metal stents, coated stents, and soluble stents. At present, heart stent materials such as cobalt alloy, titanium alloy, and stainless steel can cause intimal hyperplasia after long-term implantation in blood vessels, thereby increasing the time of late thrombosis, while biodegradable polylactic acid and other polymer materials, because their vascular support performance is not up to the standard Requirements limit the scope of use of such materials. Contents of the invention [0003] Purpose of the invention: In or...

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Problems solved by technology

At present, heart stent materials such as cobalt alloy, titanium alloy, and stainless steel can cause intimal hyperplasia after long-term implantation in blood vessels, thereby increasing the time of late thrombosis, while biodegradable polylactic acid and other polymer materials, because their vascular support performance is not up to the standard Requirements limit the scope of use of such materials

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