Rubber-like shape memory recyclable esophageal stent and preparation method thereof

A technology of memory and rubber, which is applied in the field of medical devices, can solve the problems of stenosis in the body, limit the clinical application of implanted stents in the body, and use restrictions, and achieve good biocompatibility, reduce medical burden, and less tissue stimulation.
CN113995892APending Publication Date: 2022-02-01UNIV OF SHANGHAI FOR SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SHANGHAI FOR SCI & TECH
Publication Date
2022-02-01

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Abstract

The invention relates to the technical field of medical instruments, in particular to a rubber-like shape memory recyclable esophageal stent and a preparation method thereof. The esophageal stent is prepared from 70-85 parts by weight of a superelastic material, 13-20 parts by weight of a shape memory polymer material and 2-8 parts by weight of biocompatible nano micro powder. When being in use, the rubber-like shape memory recyclable esophageal stent is pressed and held in a catheter and is conveyed to a diseased region in a body; and after the catheter is removed, the pressed and held rubber-like shape memory recoverable esophageal stent recovers by means of hyperelasticity. The rubber-like shape memory recyclable esophageal stent is heated to the shape memory recovery temperature of the shape memory polymer material to recover to the initial structure during recycling, so that the esophageal stent is convenient to take out. The manufacturing material of the stent obtained by the invention has biocompatibility and small stimulation to tissues; automatic contraction of the stent can be realized through proper external stimulation; and by coating the surface of the stent with a therapeutic drug, the therapeutic effect can be further enhanced.
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Description

technical field

[0001] The invention relates to the technical field of medical devices, in particular to a recyclable esophageal stent with rubber-like shape memory and a preparation method thereof. Background technique

[0002] Implantable stents are widely used in the treatment of airway organic stenosis, esophageal cancer, bladder / prostate cancer and other diseases. In many clinical cases, the implantation of stents is temporary. With the treatment of the primary lesion and the degree of blockage in the stenosis is alleviated, the stent needs to be recovered.

[0003] Existing implantable stents in the body are mainly made of stainless steel, NiTi alloy and other materials. These stents basically utilize the superelasticity of the stent material or stent structure, and the stent itself can self-expand, but cannot self-contract. The process of stent implantation is basically to compress it in a catheter and deliver it to the lesion in the body. After the catheter is remov...

Claims

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