Instantaneously molded intravascular stent system

Abstract

The invention relates to an instantaneously molded intravascular stent system. The instantaneously molded intravascular stent system comprises a sacculus system, a transport system and a drug stent system; the sacculus system comprises a mother sacculus and a child sacculus, the child sacculus is arranged in the mother sacculus, and an axis of the child sacculus is collinear with an axis of the mother sacculus; the periphery of the surface of the mother sacculus is provided with micropores distributed uniformly, and each micropore is an unidirectional via hole; the transport system comprises acatheter, and the catheter comprises a first channel, a second channel and a guidewire channel; the drug stent system comprises temperature sensibility degradable liquid substances, and the temperature sensibility degradable liquid substances form a drug stent on the outer side of the mother sacculus. The instantaneously molded intravascular stent system has the advantages that the disadvantage of stent meshes without therapeutic drug is eliminated, the local drug loading concentration of a vascular wall is low and even, endothelialization delay caused by high local drug loading concentrationcan be reduced, and the instability of the curative effect caused by uneven local drug concentration is reduced; and the degradable characteristic is suitable for treating a patient with recurrent restenosis.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an instantly forming intravascular stent system. Background technique [0002] Blood vessels are the tubes through which blood flows throughout the body. When blood vessels, especially arteries, are severely stenotic and occluded, local tissues may suffer from ischemia, hypoxia, necrosis, and even organ dysfunction or even failure. Angioplasty is to recanalize diseased blood vessels and restore blood supply to local tissues through various means. [0003] Commonly used angioplasty includes balloon dilatation and stent placement, which are used to treat vascular lesions in other parts of the body except the heart and brain vessels, especially vascular lesions such as extremity blood vessels, liver blood vessels, and renal artery stenosis. [0004] Vascular balloon dilatation is to place an expandable balloon catheter in the narrow vessel segment after percutaneous punctu...

AI Technical Summary

Problems solved by technology

[0005] However, in the existing stent placement, the mesh of the stent has no therapeutic drugs, the local drug concentration of the blood vessel wall is uneven, and the endothelialization delay caused by the high local drug concentration occurs, and the curative effect is unstable; the operation is easy to cause dissection: the operation is complicated, and the operation is difficult. It is cumbersome, and the stent system needs to be replaced multiple times during multiple implants, which increases the operation time, thereby increasing the radiation exposure, and is expensive. It is not suitable for long-term vascular treatment, and cannot solve the intimal tear caused by violent balloon expansion and Dissection problem; degradable stents are prone to problems of malapposition and BVS fracture, which require OCT assistance

Images