Renal artery sympathetic nerve ablation perfusion catheter, its application catheter and ablation system

Abstract

The invention relates to a perfusion tube for renal artery sympathetic nerve ablation. The tube body is composed of a hard tube, a flexible tube and a bending control tube connected in three sections. The tube wall of the tube is provided with a spring. The gap between the spring tube protection tube and the wire constitutes a waterway, and there are four cavities inside the bending control hose, two of which are water passages, one is a wire passage, and the other is a traction wire passage. This kind of tube body has increased elasticity, is not easy to be shaped, improves the recovery ability after bending, increases the torque transmission capacity, and improves the perfusion capacity. The present invention also relates to a catheter using the above-mentioned renal artery sympathetic nerve ablation perfusion tube. Front connection, stable structure, sensitive positioning. The present invention also provides an ablation system for renal artery sympathetic nerve ablation and perfusion, which includes a catheter and a sheath, and cooperates with bending control to achieve better maneuverability.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a renal artery sympathetic nerve ablation perfusion tube, its application catheter and ablation system. Background technique [0002] When performing renal artery sympathetic nerve ablation, it is necessary to use the perfusion catheter to enter the branch of the renal artery through the aorta, and the catheter needs to be bent at about 90 degrees. After entering the renal artery, since the renal sympathetic nerve is distributed in the outer layer of the renal artery and beyond, it is necessary to make the ablation electrode stick to the ventral, dorsal, upper, and lower sides of the renal artery, and to precisely twist the catheter manipulation. [0003] The perfusion catheter commonly used now includes a handle, a tubular body part and a porous electrode, the porous electrode is connected to the front end of the tubular body part, and the handle is connected to the rea...

AI Technical Summary

Problems solved by technology

[0004] At present, the perfusion catheters commonly used for ablation function are polymer material tubes, and a few are metal tubes. The tubes have strong plasticity and will maintain a certain bending shape after bending, so that the torque when twisting the catheter in the curved channel Difficult conduction, with the disadvantage of difficult operation

At the same time, there is a relatively curved catheter head, which is difficult to rotate in the narrow space inside the renal artery. When the operator needs to rotate the catheter to the dorsal or ventral position, there is a greater risk of damage to the blood vessel

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