Radio-frequency ablation catheter and system

Abstract

According to the embodiment, the invention provides a radio-frequency ablation catheter and a system. The radio-frequency ablation catheter comprises a catheter main body, a ring electrode which is arranged on the head of the catheter main body in an annular form, a positioning sensor which is arranged in the catheter main body and an ablation needle which is arranged in the catheter main body in a telescopically moving mode; and the ablation needle can extend from the head of the catheter main body and can pierce into a focus tissue when the radio-frequency ablation catheter is used. According to the embodiment, a focus position can be precisely positioned and the focus can be pierced for implementing radio-frequency ablation treatment, so that directional precise ablation treatment is achieved and injury of normal tissues is relieved.

Description

technical field [0001] The present application relates to the field of medical devices, in particular to a radiofrequency ablation catheter and system. Background technique [0002] Radiofrequency thermal ablation is a minimally invasive tumor in situ treatment technology, which converts radio frequency signals into temperature fields, and treats human tissues through thermal effects. When applying radiofrequency ablation therapy, the electrode needle is directly inserted into the lesion tissue, and the high-frequency alternating current at the tip of the electrode needle is injected into the lesion tissue. The temperature rises; when the temperature of the tissue exceeds 60°C, the cells die, eventually coagulating and inactivating the tumor tissue. [0003] Conventional radiofrequency thermal ablation is guided by imaging techniques such as ultrasound or computed tomography (CT), and the electrode needle is directly inserted into the tumor by percutaneous puncture. For lu...

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Problems solved by technology

However, most of the lung lesions are located on one side of the bronchus. If the ablation catheter uses a simple cylindrical ablation electrode, it can reach around the lesion through the bronchus, but it cannot penetrate into the inside of the tumor, but can only be close to the tumor. Through the ablation catheter Only part of the generated radiofrequency field acts on the tumor site, and part of it acts on the normal tissue, causing the normal tissue to be affected and necrotic, and the area of ​​ablation necrosis is too large

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