Multi-electrode renal artery ablation catheter

Abstract

Disclosed is a multi-electrode renal artery ablation catheter. The multi-electrode renal artery ablation catheter is used for renal artery sympathetic nerve ablation in the high blood pressure interventional therapy, and comprises an adjustable curved catheter sheath, an adjustable-diameter ablation catheter body and a functional handle, wherein the head end of the adjustable curved catheter sheath can be curved, and the ablation catheter body can conveniently enter a renal artery. The diameter of a skeleton of the adjustable-diameter ablation catheter body is adjustable. The multi-electrode renal artery ablation catheter is provided with a plurality of electrodes. Each electrode is provided with a temperature sensor. According to the multi-electrode renal artery ablation catheter, a plurality of points can be ablated in a one-off mode, the ablation points are not continuous, the temperature is controllable, when the high blood pressure is treated by removing renal artery sympathetic nerves, the risk caused by excessive ablation and narrow renal artery blood vessels is avoided, meanwhile due to the one-time ablation, the operation time and the usage of X rays can be greatly reduced, and the accuracy of the ablation is improved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a renal artery sympathetic nerve ablation catheter for interventional treatment of hypertension. Background technique [0002] Refractory hypertension refers to the inability to reach the target blood pressure despite the highest tolerated dose of drug therapy (combination therapy of three antihypertensive drugs including diuretics). These patients are at high risk for major cardiovascular events. [0003] In April 2009, Krum et al. reported a new technique of percutaneous catheter renal sympathetic nerve radiofrequency ablation for the treatment of refractory hypertension. This method cuts off the sympathetic nerve of the kidney through radiofrequency ablation without affecting the innervation of other abdominal, pelvic or lower extremity nerves, and achieves the purpose of reducing blood pressure while avoiding serious complications. In November 2010, a prospective, randomized ...

AI Technical Summary

Problems solved by technology

And the study found no surgery-related complications or adverse events, and the postoperative renal function of the patient was in good condition

[0004] As a new technology, there is still a lack of matching equipment, and there are many problems in the current clinical products. The more clinically used product is the Symplicity ablation system of Medtronic Company. Because there is only one electrode for ablation, the operation Complicated, long radiofrequency ablation time and other issues

[0005] CN102274074A discloses a multi-polar open radio frequency ablation catheter, one end of the catheter is an open structure, and it is prone to the problem that it cannot be closely attached to the inner wall of the blood vessel when the renal artery is ablated to the sympathetic nerve, resulting in the possibility of ablation failure

CN201469401U discloses a helical renal artery sympathetic radiofrequency ablation electrode catheter. The electrode is a helical structure with a simple design and is difficult to operate. It also has the problem of not being able to closely fit the inner wall of the blood vessel, resulting in the risk of ablation failure

Images