Novel knitted intravascular stent

Abstract

A novel knitted intravascular stent comprises a stent body and a medicine carrying coating, and is characterized in that a treated passive film is arranged on the surface of the stent body, the surface of the passive film is coated with the medicine carrying coating, the stent body is a diamond mesh tube formed by consecutively knitting a metal single wire, all diamond cross points are movable points, the density of diamond grids of opening ends of the stent body is smaller than that of diamond grids of a middle section, the passive film is arranged on the surface of the stent metal knitting wire, the medicine carrying coating is composed of a carrier and medicine, the medicine is wrapped on the surface of the stent passive film through the carrier and is sirolimus or taxol, and the cross section of the metal single wire can be circular or in a flat square shape. According to the novel knitted intravascular stent, the axial grid knitting densities of the stent body are different, and the surface of the stent body is coated with the medicine carrying coating so that irritation to the normal intravascular wall can be effectively reduced, the occurrence rate of vascular restenosis can be reduced, thrombosis can be reduced, and the wall attaching performance and the flexibility of the stent body can be improved.

Description

technical field [0001] The invention relates to a blood vessel interventional medical device in the field of medical devices, in particular to a novel braided blood vessel stent. Background technique [0002] Interventional therapy is a new technique for the diagnosis and treatment of cardiovascular diseases. After puncturing the blood vessels on the body surface, under the continuous projection of digital subtraction, it is sent into the vascular catheter, and the vascular disease is diagnosed and treated through specific vascular catheter operation technology. This kind of method has little trauma to the patient, and its high safety and effectiveness have been affirmed by doctors and patients, and it has become an important treatment method for vascular diseases. [0003] Vascular stent implantation refers to the placement of stents in the diseased segment on the basis of balloon expansion of the lumen to support the stenotic and occluded segment of the vessel, reduce the ...

AI Technical Summary

Problems solved by technology

The metal monofilament of the braided stent generally has a circular cross-sectional shape. Although it can ensure sufficient mechanical strength, the radial dimension, especially the radial dimension of the supporting conveyor, is also limited and cannot be made smaller.

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