Ablation catheter device

Abstract

The invention provides an ablation catheter device. The ablation catheter device comprises an ablation assembly which can be expanded in a radial direction and can be compressed in the radial direction, wherein the outer diameter of the ablation assembly is smaller than 1.78mm under a radial compressed state. The ablation catheter device can be used for carrying out renal artery sympathetic nerve radio-frequency ablation through a femoral artery puncture intervening path and also can be used for carrying out the renal artery sympathetic nerve radio-frequency ablation through a radial artery puncture intervening path, so that damages to blood vessels of patients are reduced and complication risks are reduced; the ablation catheter device can be suitable for the patients who can not undertake femoral artery puncture intervening treatment and has a wider application range.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an ablation catheter device. Background technique [0002] Hypertension is a common chronic disease. In its formation mechanism, the renin-angiotensin-aldosterone system (Renin Angiotensin Aldosterone System, RAAS) plays a key role as an important blood pressure regulation system. It maintains the body's Balance of water, electrolytes and blood pressure. Studies have confirmed that RAAS causes hypertension through the following three pathways: (1) RAAS activation causes sodium retention; (2) RAAS activation can increase the activity of the sympathetic nervous system; (3) RAAS activation can directly constrict blood vessels. Among them, the renal arterial sympathetic nerve plays a decisive role in inducing and maintaining systemic hypertension, and its overactivity enables the maintenance of hypertension. [0003] Transcatheter renal artery sympathetic nerve ablation is an ablatio...

AI Technical Summary

Problems solved by technology

However, the expandable structure with electrodes significantly increases the size of the distal end of the catheter body compared to the single-electrode structure. The ablation catheter needs to be used with a guide catheter or a delivery sheath with a larger outer diameter for intervention through the femoral artery, which will increase the risk to the patient. Vascular injury and increase the risk of complications, and transfemoral artery intervention is not suitable for bilateral femoral hip arterial malformations, overweight patients with difficulty in femoral artery puncture and difficult to stop bleeding, cardiac insufficiency and lumbar lesions who cannot lie supine for a long time, those with Patients with lower extremity deep vein thrombosis or a history of pulmonary embolism undoubtedly narrow the scope of application of this catheter

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