Vascular covered stent with novel-type coating

Abstract

The invention relates to a vascular covered stent with a novel-type coating in the field of peripheral blood vessels. The stent consists of an inner surface tectorial membrane, a metal stent, an outersurface tectorial membrane and a development structure, a parylene coating is coated on the surface of the metal stent, the head end of a product is processed into a petal-shaped structure, and heparin coatings are coated on the surfaces of the inner surface tectorial membrane and the outer surface tectorial membrane. The petal-shaped structure at the head end of the product can reduce stimulation of the head end of the product to the inner wall of a blood vessel at a contact part, so as to prevent marginal stenosis of the head end of the stent. The metal stent is coated with parylene to forma protective layer, so that the metal stent can be prevented from being corroded by blood, stent metal ions are prevented from entering human bodies and harming the health of patients, the smoothnessof the parylene coating can improve the pushing performance of a product when the product is conveyed, and the heparin coating on the surface of the tectorial membrane can prevent thrombosis at the contact part of the product and further prevent restenosis of blood vessels.

Description

technical field [0001] The patent of the present invention relates to a medical device, specifically a coated vascular stent graft in the field of peripheral blood vessels. Background technique [0002] At present, when dealing with vascular diseases such as hemangioma and vascular perforation clinically, endovascular repair provides patients with a large number of clinical benefits, and has been proved to be a safe and effective method-this minimally invasive method by placing Endovascular stents have become an alternative treatment to standard open surgical repairs, shortening the time in the intensive care unit and hospitalization, allowing faster return to normal activities, lower morbidity rates, and quicker recovery for patients. With the use of intravascular stent grafts, clinical adverse events are often reported, such as vascular thrombosis, obstruction, marginal stenosis, etc., causing patients to be re-hospitalized for treatment. [0003] Metal stents are general...

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Problems solved by technology

Moreover, due to different patient systems, some patients are allergic to nickel alloys, making it impossible to use nickel alloy stents at all.

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