catheter

Abstract

The invention discloses a catheter with a bendable head and a variable bending radius, comprising a main body and a head located at the distal end of the main body and connected with the head, the head comprising: a central tube with at least one bendable section; at least one set of pull cords, respectively fixed to a corresponding one of the at least one bendable segment; a guide wire threaded into the central tube, the guide wire comprising a connected distal end portion and a proximal end portion, the distal end portion The stiffness of the end portion is less than the stiffness of the proximal portion; wherein the guide wire is movable relative to the central tube such that when the connection between the distal portion and the proximal portion of the guide wire is located in the at least one movable When different positions of one of the bendable segments are bent, the one bendable segment can be bent at different radii by controlling a corresponding group of the at least one group of pulling cords. The catheter of the present invention can accommodate the penetration of vascular bifurcations of various shapes, angles and tortuous lengths.

Description

technical field [0001] The invention relates to medical instruments, in particular to a catheter for minimally invasive vascular intervention. Background technique [0002] Minimally invasive surgery emerged in the 1980s, and interventional surgery is an important branch. Interventional procedures can be divided into vascular intervention and non-vascular intervention. In recent years, minimally invasive vascular surgery (MIVS) has been widely used at home and abroad. Minimally invasive vascular interventional surgery refers to the fact that under the guidance of medical imaging X-ray images during the operation, the doctor inserts the catheter into the blood vessel and controls the movement direction of the front end of the catheter outside the body, and sends the catheter from the patient's puncture site to the target blood vessel to perform the corresponding operation. treat. The operation has the advantages of small wound, less bleeding, less pain for patients, quick ...

AI Technical Summary

Problems solved by technology

However, once the above-mentioned existing catheter is manufactured, its achievable bending parameters, especially the scope of the bending radius at a certain bending angle, are basically fixed, and the blood vessels in the human body are diverse, and the different blood vessels are different. Shapes, angles, and bend radii can vary significantly, making existing catheters of this type difficult to access in certain vessels, especially those with bend angles and / or bend radii beyond the range achievable with the catheter. Difficulty, even forced to suspend operation

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