Blood flow guiding dense net stent

Abstract

The invention discloses a blood flow guiding dense net stent. The dense net stent is formed by a plurality of independent net pipe stents. A plurality of multiple independent net pipe stents can penetrate through one another to form an independent net pipe stent, and the independent net pipe stent is formed by weaving metal wires, anti-thrombus polymer fibers and polymer fibers for promoting endothelialization of vascular cells; when used for interventional therapy of aneurysm, the blood flow guiding dense net stent has good anti-thrombus and endothelialization promotion performance of a cardiovascular stent, and the diameter of the stent meshes is gradually increased along with gradual closure of the aneurysm and vascular reconstruction, so that artery occlusion of perforator and collateral branches in a coverage area of the interventional stent can be effectively prevented; the safety and effectiveness of vascular reconstruction are greatly improved; meanwhile, due to the fact that the metal wires with different diameters and the polymer fibers are used, the dense net stent is rigid and soft, good radial supporting force can be kept, and safety and effectiveness of the stent are further guaranteed; and the stent is simple in preparation process and low in cost, and can be used for automatic production.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a dense mesh stent for directing intracranial aneurysm blood flow. Background technique [0002] Aneurysms are hemangioma-like protrusions due to abnormal changes in arterial local blood vessels. Mostly due to subarachnoid hemorrhage caused by rupture of aneurysm, the mortality rate is very high. Blood flow directing dense mesh stent is an emerging method for treating aneurysms. By effectively changing the hemodynamics at the aneurysm neck, it can change the direction of blood flow and reduce the impact pressure of blood flow on the aneurysm neck and aneurysm wall. It achieves the purpose of vascular remodeling, and has the advantages of small trauma, high safety and effectiveness, low long-term recurrence rate of aneurysms, and no gravity mass effect. [0003] However, because the blood flow directing dense mesh stent is generally made of stainless steel, t...

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Problems solved by technology

[0003] However, because the blood flow directing dense mesh stent is generally made of stainless steel, titanium and its alloys, nickel-titanium alloy and other materials, these materials have poor blood compatibility, and it is easy to cause thrombosis after implantation, thus causing greater At the same time, with the development of modern medical technology, the ability to promote the rapid growth of cardiovascular endothelial cells has become the gold standard for the treatment of cardiovascular diseases

[0004] At present, Pipeline, the representative product of blood flow directing dense mesh stent, uses metal mesh stents to coat to reduce the formation of thrombus after stent implantation, but the process is complicated and requires the formation of metal mesh stents first. Coating treatment; the bonding fastness of the coating material and the metal stent will seriously affect the safety and effectiveness of the product; easy to cause embolism of distal blood vessels due to the peeling off of the coating

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