Retractable spiral laminar ring type electrode catheter

Abstract

The invention relates to a retractable spiral laminar ring type electrode catheter used for sympathetic denervation in a renal artery, which comprises a control handle, a catheter body, a control rod, a retractable spiral laminar ring and at least one electrode, wherein the control rod is penetrated through the catheter body with one end of the control rod fixed onto the control handle; the retractable spiral laminar ring comprises at least one laminar ring, one end of the retractable spiral laminar ring is fixed onto the other end of the control rod, the other end of the retractable spiral laminar ring is fixed onto one end of the catheter body, and the end of the catheter body is positioned at the opposite side of the control handle; the at least one electrode is fixed on the retractable spiral laminar ring, each electrode can be used for electric signal extraction and ablation, a lead wire is connected to the lower part of each electrode, and the lead wire extends along the retractable spiral laminar ring inside the retractable spiral laminar ring and extends to the control handle through the catheter body, thereby realizing the electrical connection with the control handle; and the control rod can move relative to the catheter body, thereby adjusting the circumferential dimension of the retractable spiral laminar ring. By using the retractable spiral laminar ring type electrode catheter, the tightness of joint between the electrode and a vascular wall can be adjusted.

Description

technical field [0001] The present invention relates to an electrode catheter, and more particularly to an electrode catheter for denervating sympathetic nerves in renal arteries. Background technique [0002] Refractory hypertension, also known as refractory hypertension, refers to hypertension that cannot be effectively controlled by lifestyle modification and 3 or more antihypertensive drugs (including a diuretic). Experimental data prove that hypertension is related to the high excitability of renal sympathetic nerves in patients. Blocking renal sympathetic nerves can not only reduce blood pressure, but also have an impact on chronic organ-specific diseases with excessive activation of sympathetic nerves; blocking renal sympathetic nerves can also improve Left ventricular hypertrophy and insulin resistance. [0003] The latest animal and clinical experimental data prove that the radiofrequency ablation of the renal sympathetic nerve with percutaneous catheter can signif...

AI Technical Summary

Problems solved by technology

However, the tightness of electrode adhesion to the vessel wall cannot be adjusted, and the ablation temperature design cannot be monitored, so it is difficult to ensure the degree of ablation, and there are risks such as failure to achieve curative effect when the degree of ablation is too shallow, or perforation caused by the degree of ablation

Images