Renal artery stimulation and ablation electrode catheter

Abstract

The invention discloses an electrode catheter for quickly and accurately carrying out stimulation and ablation on sympathetic nerves on a renal artery wall by using a same catheter. An electrode catheter comprises a wire guide head inserted into a renal artery through a guide electrode catheter, a mesh basket, a pipe body, a control handle for controlling a space shape change of the mesh basket, and a connector, wherein the mesh basket is capable of adapting to full and tight contact with the inner wall of the renal artery through changing the space shape, and carrying out stimulation and ablation surgeries on renal sympathetic nerves; and the connector is used for electrically connecting a ring electrode on the mesh basket, an external stimulator and a radio frequency instrument and fixing on the tail part of the control handle. The electrode catheter is capable of carrying out electric stimulation on an inner membrane of the renal artery, mapping a point with an obvious blood pressure rise caused by the stimulation, finding out a sympathetic nerve dense region and carrying out positioning target ablation, so that more effective ablation of the sympathetic nerves on the renal artery wall is achieved. Stimulation mapping, ablation and temperature control of the renal artery can be achieved on the same ring electrode, position errors caused by replacement of various instruments in different processes are avoided and the electrode catheter is more accurate and faster.

Description

technical field [0001] The invention relates to a medical device for interventional therapy, in particular to an electrode catheter for stimulating and radiofrequency ablation of renal sympathetic nerves for treating obstinate hypertension. Background technique [0002] Refractory hypertension is relatively common clinically, with many pathogenic factors, unclear pathogenesis, poor drug treatment effect, and immature diagnosis and treatment technology, which has become one of the major problems in the treatment of hypertension, and such patients are usually combined Have other cardiovascular diseases, such as coronary heart disease, diabetes, heart failure, hyperlipidemia, kidney disease, peripheral artery disease, stroke, left ventricular hypertrophy, etc. Among the various complications of hypertension, the damage to the heart, brain, and kidney is the most significant. For example, according to the statistics of the World Health Organization, 50% of cardiovascular disease...

AI Technical Summary

Problems solved by technology

[0005] Radiofrequency ablation of renal artery intima has brought new hope for the thorough and effective treatment of refractory hypertension, but there is no medical device that is actually used in clinical treatment of refractory hypertension, and the reports seen are only limited to the experimental stage

And the catheter of prior art is simple and simple, can not effectively and reliably treat refractory hypertension

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