Degradable and recoverable 4D printed linear organic body support and its use method

Abstract

A degradable and withdrawable 4D printing linear organic human body stent and a using method therefor. The human body stent comprises a spiral part (9) and a mounting ring (3); the mounting ring (3) is at least provided at one end of the spiral part (9), and a fixing hole (4) is provided in the mounting ring (3); the spiral part (9) comprises a plurality of spiral units which are successively connected; each spiral unit comprises a periphery unit (1) and a plurality of supporting units (2); the supporting units (2) are arch-shaped projections which are parallel to the axial direction of the human body stent; the periphery units (1) are spiral. The human body stent can be fixed in a blood vessel under the conditions that the blood vessel is not damaged and an auxiliary fixing device is not added. Moreover, the human body stent can be conveniently taken out within a short time, and can be effectively degraded in a long-term using process without stimulating the wall of the blood vessel.

Description

technical field [0001] The invention relates to the technical field of human body supports, in particular to a degradable and recoverable 4D printed linear organic human body support and its use method. Background technique [0002] According to the data of "China's Health Statistics Summary", there are more than 270 million people with cardiovascular and cerebrovascular diseases in China, and the death toll caused by cardiovascular and cerebrovascular diseases is close to 40% of the total number of deaths in the country. It has become the "number one killer" of Chinese people's health. . The main cause of cardiovascular disease is the deposition of excess fatty substances and calcium on the blood vessel wall to make it thicker, resulting in narrowing or blockage of blood vessels, resulting in difficulty in blood circulation, resulting in angina pectoris, myocardial infarction and even death. Up to now, the main means of combating cardiovascular diseases is to use percutane...

AI Technical Summary

Problems solved by technology

Patients implanted with this type of metal vascular stent cannot undergo MRI, which will cause vascular endothelial hyperplasia and secondary stenosis; in addition, vascular stents can usually complete their mission of supporting blood vessels in a few months, and then the blood vessels return to normal and no longer Vascular stents are needed, so patients implanted with non-degradable vascular stents will face the risk of secondary stenosis. Once secondary stenosis occurs, they must accept the pain of heart bypass

Chinese patent 200820006963.2 discloses a tubular vascular stent composed of a catheter and an automatic pop-up stent source, and once implanted, it cannot be easily removed in a short period of time

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