Radio frequency cable controlled ablation catheter system for removing sympathetic nerve from kidney

Abstract

The invention discloses a radio frequency cable controlled ablation catheter system for removing a sympathetic nerve from a renal artery. The system comprises an ablation catheter, a control handle and an ablation generation device, wherein a guiding catheter can be arranged or is not arranged. The ablation catheter sequentially consists of a catheter body section and an ablation section from a near end to a far end, and is characterized in that the front end of the catheter body section also comprises a controllable bending section; the controllable bending section is connected with the control handle through the catheter body section; and the ablation section is provided with at least two independent structures, and an ablation head is arranged on at least one independent structure. The system can simultaneously perform multi-point ablation, monitors an ablation effect in real time during operation, and has relatively high mechanical stability.

Description

technical field [0001] The invention relates to a medical device, in particular to an ablation catheter system for treating hypertension and entering into the renal artery to block the renal sympathetic nerve. Background technique [0002] Hypertension is a common clinical disease and frequently-occurring disease. According to the latest data, the number of hypertensive patients in China has exceeded 200 million, and the number of patients is increasing year by year, and the age of onset is gradually advancing. Heart, brain, kidney and other important organ complications caused by high blood pressure have a high mortality rate and disability rate, which seriously endanger human health. There are about 30 to 39 million patients with resistant hypertension in my country. In the future, with the aging of the population and the increase in obesity symptoms and diabetes, the number of patients with resistant hypertension will further increase, which will bring great benefits to s...

AI Technical Summary

Problems solved by technology

Aiming at the problem that the ablation catheter of Ardian Company cannot perform multi-point ablation, US 2012 / 0116392 A1, US 2012 / 0029510 A1, CN 201110117776.8, CN201110327772.2 achieve multi-point simultaneous ablation by setting radio frequency ablation electrodes on multiple electrode rods respectively The purpose of CN 102198015A is to realize multi-point simultaneous ablation by installing multiple radio-frequency electrodes on a spiral electrode rod according to predetermined positions. The ablation electrode is not tightly attached to the blood vessel wall, which makes the radio frequency ablation electrode easy to move during ablation, resulting in too large ablation range and causing unnecessary damage to the patient; in order to make multiple radio frequency ablation electrodes closely adhere to the blood vessel wall at the same time, US 2012 / 0101403A1 adopts the scheme of setting an expansion balloon in the spiral electrode rod. By filling the balloon with liquid, the radiofrequency ablation electrode can be closely attached to the blood vessel wall, but the renal blood flow will be blocked when the balloon is expanded. If the ablation time is long, it will easily lead to renal ischemia and unnecessary complications; in order to avoid renal blood flow being blocked, US 2012 / 0029512 A1 replaces the balloon with a wire tennis ball, although it solves the problem of renal blood flow The problem of being blocked, but the operation is far less convenient than the balloon; in addition, the course of the human renal artery varies greatly, and the above-mentioned design schemes of multiple radiofrequency ablation electrodes are difficult to apply when the course of the renal artery varies, thus limiting the People who are treated with sympathetic nerves; secondly, Ardian’s single radiofrequency electrode catheter and the above-mentioned multiple radiofrequency ablation electrode catheters need the assistance of an external catheter to reach the designated ablation site, and the guidance of the catheter is not accurate enough, so it cannot meet the clinical needs. Require

Thirdly, it is difficult to monitor the ablation effect in real time for Ardian’s single radiofrequency electrode catheter and the above-mentioned multiple radiofrequency ablation electrode catheters, so it is difficult to detect the curative effect during the operation, which increases the risk of secondary surgery for patients

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