Ablation catheter device

Abstract

An ablation catheter device comprises a hollow catheter main body, an ablation mechanism and a control mechanism. The ablation mechanism comprises a support assembly capable of being expanded and compressed radially, an end head and a plurality of modulation units. The support assembly is arranged between the far end of the catheter main body and the end head, the modulation unit is arranged on the support assembly, and an axial through hole is formed in the end head. The control mechanism comprises a drawing wire and a limit unit fixed on the drawing wire. The drawing wire coaxially and movably penetrate the catheter main body and a through hole, the end head is arranged between the support assembly and the limit unit, and the outer diameter of the limit unit is larger than the hole diameter of the through hole. The ablation catheter device can select a transfemoral coronary puncture intervention path, and can also select a transradial coronary puncture intervention path. For some bended complex artery blood vessels, the ablation catheter device can reduce adjustment and moving location difficulty in the blood vessels, avoids damage to the blood vessels as much as possible and improves the ablation effect.

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. Regulate and maintain the balance of water, electrolytes and blood pressure in the body. 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...

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Problems solved by technology

[0007] In addition, from the anatomical structure of the blood vessels, it can be known that the renal arteries have different shapes, some blood vessels are relatively straight, and some blood vessels are more curved and complicated.

For relatively straight renal artery vessels, the distal end of the main body of the catheter can be smoothly adjusted and moved in the vessel during the operation; while for relatively curved and complicated renal arterial vessels, the size and stiffness of the distal end of the catheter main body are uneven during the operation. Larger and other reasons, it is easy to cause the adjustment and movement positioning of the distal end of the main body of the catheter in the renal artery blood vessel, which makes it difficult to complete the ablation or damage the inner wall of the patient's blood vessel

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