Radiofrequency ablation controlled electrode catheter for renal artery

Abstract

The invention relates to a medical apparatus of interventional therapy, and particularly relates to a radiofrequency ablation electrode catheter used for curing refractoriness hypertension through per cutem and blood vessel to enter into renal artery. According to the invention, the technical problem to be solved is that a sympathetic nerve on the arterial canal of the renal artery can be effectively removed, so that damages to the inner wall of the vessel can be reduced. According to the invention, the radiofrequency ablation controlled electrode catheter for renal artery is provided with a catheter body, wherein an electrode is connected with a far-end of the catheter body; a control handle is connected with a near-end of the catheter body; an ablation electrode and a monitoring electrode are arranged at the far-end of the catheter body along the axis of the catheter body; and an interval is arranged between the ablation electrode and the monitoring electrode. Compared with prior art, the invention is in characterized in that no fill orifice is arranged on the ablation electrode; the monitoring electrode adjoins the ablation electrode through the interval; the temperature of the sympathetic nerve which is ablated is monitored during the ablation process, so as to judge a clinical treatment required value is reached; also, the conduction of sympathetic nerve signal acquired through monitoring the electrodes, and the comparison of conduction waveforms of the sympathetic nerve before and after ablation, can provide supplementary means for judging if a surgical operation end is finished or not.

Description

technical field [0001] The invention relates to a medical device for interventional therapy, in particular to a radiofrequency ablation electrode catheter for percutaneous, blood vessel, and renal artery access to treat obstinate hypertension. Background technique [0002] Nearly one-fifth to one-third of adults in the world suffer from high blood pressure. Hypertension causes 7.5 million deaths every year, and the death rate ranks first in the world. For every 20 / 10mmHg increase in adult blood pressure, the mortality rate from cardiovascular disease doubles. Despite increased efforts by healthcare professionals to better diagnose and control hypertension, only half of treated patients achieve the established blood pressure targets. Traditional drug control regimens, patient compliance, physician inertia, drug side effects, and drug ineffectiveness are all factors that lead to poor control effects. Now Europe does not allow patients with diabetes or eGFR<60 to use ACE or...

AI Technical Summary

Problems solved by technology

Another method in the prior art is to use an ablation catheter for treating arrhythmia to ablate the sympathetic nerve on the renal artery to achieve the purpose of treating intractable hypertension. This kind of ablation catheter has a relatively large diameter and is inconvenient to operate in the renal artery , and the ablation area is larger, causing greater damage to the renal artery

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