Medical tectorial membrane shaped radiation NiTi alloy endovascular stent

Abstract

The present invention belongs to the technique category of the medical instrument, relates to a tectorial conformal radiate NiTi alloy vascular inner rack which is implanted to the blood vessel of the human body. To settle the problems of that the existing vascular inner rack can not restrain the growth of the tumour and the thrombus is easy to form, etc., the bracket used by the invention is self-expanding NiTi alloy vascular inner rack, a layer of polycarbonate type polyurethane membrane is covered at the inner wall, the antineoplastic medicine is spraying-coated to the inner surface of the membrane, and the active particles which are used for the inner radiating of the tumour are inserted at the outer bracket of the membrane according to the conformal property. The NiTi alloy vascular inner rack applied by the invention can effectively expand and support the blood vessel; the novel film forming material polycarbonate type polyurethane has an excellent bioavailability; the active particles for the conformal radiotheraphy outside the membrane are inserted to the bracket with a simple and convenient double-buckle mode, the growth surround the blood vessel area is effectively restrained and the radioactive side injury of the normal tissue is reduced. The invention has the advantages of easy making, low cost, strong innovation and wide market prospect.

Description

technical field [0001] The invention belongs to the field of medical equipment, and relates to a metal vascular stent, in particular to a NiTi alloy vascular stent that can be implanted into human blood vessels. The inner wall of the stent is covered with a layer of polyurethane film, and radioactive particles are embedded on the stent according to the radiation conformity. Background technique [0002] At present, the medical metal intravascular stents widely used in clinical medical work are mostly used to treat benign diseases such as coronary vascular and peripheral vascular stenosis, but in clinical practice, solid tumors often invade important blood vessels or directly grow into blood vessels to form tumor thrombi However, placement of conventional endovascular stents can expand and support blood vessels, but cannot control tumor growth. For tumors that have invaded important blood vessels, even if the covered intravascular stent is used, it can only act as a compressi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a conformal radiation NiTi alloy intravascular stent covered with intima in order to solve many defects such as that the metal intravascular stent in the prior art cannot effectively inhibit tumor growth and is easy to form thrombus. The actual needs of the work, more in line with the actual use requirements

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