Recoverable intravascular stent based on paper folding mechanism

Abstract

The invention provides a recoverable intravascular stent based on a paper folding mechanism. The recoverable intravascular stent comprises a plurality of stent assemblies; the multiple stent assemblies are sequentially connected to form an annular stent for supporting blood vessels; the annular stent comprises a first unfolded state and a second contracted state; and the two adjacent stent assemblies are folded around a joint of the two adjacent stent assemblies, so that contraction of the annular stent in the second state is achieved. According to the recyclable intravascular stent based on the paper folding mechanism, by providing a stent structure designed and achieved based on the paper folding mechanism, large-proportion volume transformation can be achieved, meanwhile, the recyclable intravascular stent is small, exquisite, light and free of scattered parts, the mechanical deformation reliability is high due to the integrated structure, and moreover, the stent based on the paper folding mechanism can be processed on a plane in the preparation process, and is simpler and quicker compared with a whole set of traditional three-dimensional milling, etching and heat treatment processes.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a recoverable vascular stent based on an origami mechanism. Background technique [0002] Vascular stents are widely used in medical treatment, such as implanting stents at specific positions in the human body to support stenotic and occluded blood vessels, reduce elastic recoil and reshaping of blood vessels, and maintain smooth blood flow in the lumen. Some internal stents also have the effect of preventing restenosis of blood vessels. At present, the general form of vascular stent placement is to use catheter delivery. The main process is to let the catheter enter the human body along the blood vessels of the human body. After the balloon is expanded to a certain diameter, it sticks to the inner wall of the blood vessel and maintains its shape to open and support the stenotic and occluded segment of the blood vessel. Some stents can also carry specific drugs on the ve...

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