Balloon dilatation catheter

Abstract

The invention discloses a balloon dilatation catheter. The balloon dilatation catheter comprises a soft head, a balloon, an inner tube, a far-end outer tube, a transition tube, a hypotube and a catheter handle, wherein a combination body of the soft head and the inner tube is placed in and connected to the far-end neck part of the balloon; the inner tube penetrates through an inner cavity of the far-end outer tube and an inner cavity of the balloon; the farthest end of the far-end outer tube is placed in the near-end neck part of the balloon and is connected with the near-end neck part of theballoon; one or more blood flow guide grooves are formed in the surface of the balloon in the axial direction; and the inner tube is of a multi-layer structure, an outer layer is a macromolecule layerwith gradually changing hardness, a middle layer is a metal net, and an inner layer is PTFE. The balloon is provided with the blood flow guide grooves, so that blood flow cannot be completely blockedwhen the balloon is filled, and damage caused by ischemia of far-end blood vessels and tissue is avoided. The far ends of the balloon and the catheter are very smooth, and the balloon dilatation catheter is good in control performance and high in penetrating through performance, so that the surgery is quick, the cost is saved, and the risk to a patient is low.

Description

technical field [0001] The invention belongs to medical equipment, in particular to a balloon dilation catheter. Background technique [0002] Cerebrovascular disease is the most common major disease that threatens human life and health. Stroke is the leading cause of death in my country. Research data shows that 3.3 million new strokes occur in my country every year, and the number of stroke deaths is about 1.7 million every year. The annual treatment cost for this disease in the country is more than 10 billion yuan, which causes a heavy economic burden to the country and families. Cerebral aneurysm refers to an intracranial aneurysm with a hidden course and sudden onset. Once onset, disability and mortality are also high. Therefore, it is called an intracranial "uncertain time bomb" and is one of the most dangerous cerebrovascular diseases. one. There are as many as 200,000 new cerebral aneurysm patients in my country every year. For stroke and brain aneurysm, drug tre...

AI Technical Summary

Problems solved by technology

[0004] 1. In order to ensure that the drug fully penetrates into the blood vessel or tissue, the DCB usually needs to be kept in a filling state for more than one minute, but the conventional coronary and peripheral vascular balloon dilation procedures limit the balloon expansion time (blocking blood flow time) to no more than a few minutes. ten seconds

The short contact time between DCB and diseased tissue and the low drug transfer rate need to be solved urgently

[0005] 2. Due to the insufficient binding force between the existing drug coating carrier material and the balloon material, the drug on the surface of the balloon is seriously lost during the intervention process

[0006] 3. The existing drug coating carrier materials have general hemocompatibility, which will have a negative effect on blood vessel healing

The balloon structure of this design is complex, the processing cost is very high, and many chemicals with poor hemocompatibility need to be used. For example, the filling agent is a kind of silicon dioxide or starch, and a hydrophilic polar monomer ( one of acrylic acid, methacrylic acid, acrylamide, acrylate, methacrylate, hydroxyethyl methacrylate, vinyl acetate, or acrylonitrile)

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