Intravascular stent used for repairing lesion blood vessel

Abstract

A tubular meshwork structure intravascular stent with pores. The porosity of the intravascular stent is 40%-80%, and the pore size of mesh is 0.05mm-0.8mm.

Description

technical field [0001] The invention relates to an implantable device for treating vascular malformation, in particular to a novel vascular stent for repairing aneurysm-bearing arteries. More specifically, a vascular stent with low mesh porosity for occluding aneurysms. Background technique [0002] The wall of the blood vessel, especially the wall of the artery, may have local abnormal expansion or protrusion, which is generally called an aneurysm. The vessel wall is weakened due to factors such as disease, injury or congenital factors. Under the impact of blood flow, the weak point of the artery wall protrudes outwards and gradually expands to form a round, oval or diamond-shaped cystic enlargement. Aneurysm is a potentially life-threatening disease. Under the impact of blood flow, the aneurysm continues to grow, thereby compressing surrounding organs or tissues, causing symptoms; or, due to increased blood pressure or other factors, the aneurysm ruptures, and then rapid ...

AI Technical Summary

Problems solved by technology

Therefore, the metal guide wire, microcatheter or coil head used in the operation can easily puncture the thinner aneurysm wall, causing intracranial or intracerebral hemorrhage, which directly leads to the death of the patient during or after the operation;

[0008] (2) Simple coil packing of wide base aneurysms cannot ensure that the coils are coiled in the aneurysm cavity, and it is very easy to escape into the parent artery, resulting in occlusion of the main artery;

[0010] (4) Pseudoaneurysm, the aneurysm wall lacks the support structures such as smooth muscle and elastic fibers that normal blood vessels should have. Effective packing creates difficulties

[0011] (5) Due to the characteristics of the material, it is difficult to organize the thrombus in the tumor cavity after packing, or part of the packing is non-dense, resulting in recurrence or even enlargement of the lesion

[0012] (6) The operation is time-consuming and expensive

This technology improves the disadvantages of coil embolization to a certain extent (such as coil escaping into the parent artery, improving the treatment effect of wide-necked and fusiform aneurysms), but this technology has many problems such as complicated operation, high difficulty, and high cost. defect

More importantly, because this technology also uses the principle of embolization of the tumor cavity with metal rings to treat hemangiomas, it is difficult to organize the thrombus in the tumor cavity after packing, or part of the non-dense packing makes it impossible for the tumor-bearing blood vessels to achieve true significance. Anatomical Cure on

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