A renal artery radiofrequency ablation catheter with cold saline for sympathetic nerve removal with a sealing valve

Abstract

The invention relates to a renal artery sympathetic cold saline radiofrequency ablation catheter with a sealing valve, which comprises: a spiral ablation tube, and a through hole for guide wire penetration and saline injection is arranged in the ablation tube along the spiral direction; connected to the through hole Remote sealing valve. The injection of cold saline in the ablation tube of the present invention and the penetration of the guide wire share a through hole, and a sealing valve is provided at the far end of the through hole. It can inject cold saline through the through hole during ablation to prevent coking of the inner wall of the blood vessel and vascular spasm, which greatly simplifies the internal structure of the inner tube, reduces the outer diameter of the catheter, and reduces the difficulty and cost of manufacturing. When it is spiral, it provides a reliable curvature, so that it is close to the inner wall of the renal artery and improves the ablation effect. The present invention can be applied to renal artery denervation.

Description

technical field [0001] The invention relates to a minimally invasive medical device, in particular to a renal artery sympathetic cold saline radiofrequency ablation catheter with a sealing valve. Background technique [0002] Hypertension is a disease that seriously threatens human health. It is an important risk factor for various cardiovascular diseases, coronary heart disease, especially stroke, and a common cause of kidney damage, heart failure and death. About 2 / 3 of the causes of death from cardiovascular disease are related to hypertension. In 2013, there were 300 million hypertensive patients in China, and the proportion of patients with resistant hypertension was about 15%. With the continuous development of relevant research on hypertension, its treatment concept is also constantly updated. Although there are countless drugs to treat high blood pressure, a considerable number of people are resistant to them. There are also patients whose blood pressure cannot be...

AI Technical Summary

Problems solved by technology

Although the catheter is perfused with cold saline, the bending degree of the tube body is also controlled by the handle, which is random and cannot achieve a good wall-attachment effect; and there is no guide wire for the catheter to enter the human blood vessel, so it is relatively difficult after entering the human body. Difficult to reach the exact ablation site, affecting the ablation effect

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