Cutting device for blood vessel plaque

Abstract

The invention discloses a cutting device for a blood vessel plaque. The cutting device comprises a plaque cutting system, a pressurized expansion system and a delivering device, wherein the cutting system comprises a plurality of cutting wires or cutting blades which are connected with a far-end cutting indicating ring and a near-end cutting indicating ring; the pressurized expansion system consists of a balloon and a balloon indicating ring; the delivering device comprises a long and thin hollow near-end pipe body connected with the pressurized expansion system, a stress transition pipe and a pressure connecting seat. The cutting device for the blood vessel plaque, disclosed by the invention, has the following characteristics that the positions of the cutting wires or the cutting blades can be seen in the cutting operation process of the blood vessel plaque, the convenience in operation is realized, and bending of the balloon is avoided; the cutting device can be used for cutting the blood vessel plaque, in particular a heavily-calcified or fibrous plaque at lower pressure without less damage to blood vessels.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, and in particular relates to a blood vessel plaque cutting device that can be used for expanding blood vessel occlusion sites. Background technique [0002] Interventional therapy refers to the use of puncture needles, catheters, and other interventional equipment to insert specific instruments through natural channels or tiny wounds under the guidance and monitoring of digital subtraction angiography, CT, ultrasound, and magnetic resonance imaging equipment. A general term for a series of technologies that are introduced into human diseased parts for minimally invasive treatment. Vascular plaque is the accumulation of fat and cholesterol in arteries, forming atherosclerotic plaques, resulting in narrowing and blocking of arteries. The symptoms of atherosclerosis mainly depend on the degree of vascular disease and ischemia of the affected organs. Aortic atherosclerosis often has no ...

AI Technical Summary

Problems solved by technology

The defect of this kind of catheter is that the bending stress of the annular stent is relatively large, and it is difficult to pass through the tortuous blood vessels, resulting in the inability to complete the operation.

In addition, the above three structures do not have an indicator ring for the position of the cutting wire. The position of the cutting wire cannot be seen under X-rays. The position of the cutting wire can only be guessed based on the position of the balloon developing ring for surgical expansion, which will also lead to complications that damage normal blood vessels.

[0006] Therefore, there is a need for a vascular plaque cutting device, which can overcome the current technical problems such as the large external size of the traditional cutting balloon, the difficulty of passing through severe occlusive lesions, the easy collapse of the cutting wire, and the inability to determine the specific position of the cutting wire, and retain the common balloon. The basic structure and method of use of the balloon dilatation catheter make it easy for doctors to operate

Images