Self-crimping intravascular stent forming system and forming method

Abstract

The invention discloses a self-crimping intravascular stent forming system and forming method. The forming system comprises a feeding system, a spinning collection system, a three-axis motion platform, a power supply, a computer control system, a stamping machine, an air pump and a temperature control system. The forming system firstly forms a groove structure of an innermost layer of an intravascular stent through an electrostatic direct writing process under drive of the three-axis motion platform, and then the groove structure is compounded onto a basic thin film, prepared through stamping in advance, through a micro-stamping technology to serve as a blood vessel inner layer; then the basic thin film is passively rolled into a tubular shape by using a swelling property of the self-crimping thin film and the self-crimping characteristic of the self-crimping thin film; and finally, an outermost layer of the intravascular stent is formed through an electrostatic spinning process under the drive of the three-axis motion platform, and the three-layer intravascular stent with enough mechanical strength is finally formed.

Description

technical field [0001] The present invention relates to the technical fields of mechanical manufacturing and biomanufacturing, and more specifically relates to a self-rolling vascular stent forming system and forming method based on electrostatic direct writing, electrospinning and micro-imprinting technologies. The preparation of vascular stents with ordered groove structure is realized. Background technique [0002] In recent years, the morbidity and mortality of cardiovascular diseases have been showing an increasing trend year by year, which has become a problem that cannot be ignored. Treatment of vascular diseases is hampered by the lack of suitable autologous blood vessels. Therefore, there is an urgent need for a large number of natural blood vessel substitutes clinically, and the construction of functional tissue vascular scaffolds has broad application prospects. [0003] The inner diameter of blood vessels in the human body ranges from 5 microns to 25 mm. The bl...

AI Technical Summary

Problems solved by technology

Although these traditional methods have obtained relatively successful vascular stents or stents with a vascular network, it is difficult to achieve a hierarchical structure of the stent in the current process for preparing vascular stents.

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