Electromagnetic bending-adjusting balloon catheter

Abstract

The invention discloses an electromagnetic bending-adjusting balloon catheter which comprises a catheter body, a balloon arranged outside the catheter body and a liquid-gas pipe arranged outside the catheter body, and the adjustable head end of the catheter body is connected with a main body of the catheter body through a spring. And permanent magnets and electromagnets distributed along the circumference of the section of the catheter are respectively arranged in the adjustable head end and the catheter close to the opposite end surfaces. According to the device, a bending adjusting system composed of a plurality of permanent magnets and electromagnets is evenly arranged in the circumferential direction of the balloon catheter, the electromagnets at the proper positions can be selected according to the bending shape of the blood vessel, forward or reverse magnetizing is conducted, the direction of the adjustable far end can be changed, a doctor does not need to apply extra force to the balloon catheter, operation of the doctor is facilitated, and the working efficiency is improved. And the intensity of the magnetic field of the electromagnet can be controlled by changing the magnitude of the alternating current, so that the magnitude of the attractive force / repulsive force borne by the permanent magnet is adjusted, and accurate adjustment of the bending shape is realized.

Description

technical field [0001] The present invention relates to the technical field of medical devices, in particular to an electromagnetic steerable balloon catheter. Background technique [0002] Atherosclerosis, dissection, or vascular disease related to development, inflammation, and autoimmunity can lead to narrowing of blood vessels such as carotid and intracranial arteries. At present, the commonly used surgical methods for the treatment of vascular stenosis include balloon dilation and stent implantation. The balloon catheter is a commonly used medical device, which is often used for interventional or implantation treatment of vascular stenosis. The principle is to use a device such as a pressure pump or an inflator at the proximal end to inject liquid or gas into the polymer balloon with certain compliance through the internal liquid-gas channel, so that the balloon is under the action of the pressure of the liquid or gas. The balloon catheter can also be loaded with a no...

AI Technical Summary

Problems solved by technology

[0005]1. The traction force is transmitted to the far end through a long path, and there is a certain loss in the process. Usually, it is necessary to apply a large force at the proximal end, and it is difficult to adjust the bend. Inconvenient for doctors to operate;

[0006] 2. The curved shape is manually adjusted by the doctor, and the size of the formed curved shape depends on the doctor's hand feeling, resulting in rough adjustment and poor accuracy. Improper operation may cause distal damage to the blood vessel wall or even perforation of the blood vessel wall;

[0007] 3. Due to the effect of the traction wire, there is a certain risk of folds and delamination at the distal end of the catheter, and the overall deformation of the catheter may occur, which will lead to accidents such as vasospasm or catheter breakage caused by catheter deformation

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