Radiofrequency ablation catheter for distribution of heat exchange mediums, lung radiofrequency ablation system, control method and control device

Abstract

The invention relates to a radiofrequency ablation catheter for distribution of heat exchange mediums, a lung radiofrequency ablation system, a control method and a control device. The radiofrequencyablation catheter comprises an electrode, wherein the electrode is provided with a heat exchange medium flow passage; the heat exchange medium flow passage is a cavity which is positioned in the electrode; the heat exchange medium flows out of an opening hole which is formed in the wall of the cavity; a balance device is arranged on the electrode; a wetting hole is formed in the balance device, and is communicated with the heat exchange medium flow passage; the heat exchange medium which is outputted by the heat exchange medium flow passage is distributed by the balance device, and flows out.The radiofrequency ablation catheter has the advantages that the normal saline is filled into the ablation tissues by the electrode, so that the electric conductivity and heat conductivity of the ablation tissues are improved; the balance of impedance is maintained, the impedance is maintained under the relative stable state, and the radiofrequency energy can be continuously outputted.

Description

technical field [0001] The present application relates to the field of tumor minimally invasive ablation therapy, and in particular to a radiofrequency ablation catheter that facilitates the distribution of heat exchange medium, a lung radiofrequency ablation system, and a control method and control device. Background technique [0002] Lung cancer is one of the most common malignant tumors. In clinical treatment, surgical resection is still the first choice for the treatment of early lung cancer. However, for lung cancer patients who are older, weaker, have poor cardiopulmonary function, or have complications, they are not suitable or tolerate conventional surgical resection. Therefore, many local treatment methods such as minimally invasive tumor ablation have emerged. Minimally invasive ablation of lung tumors includes radio frequency ablation (RFA), cryoablation, microwave ablation, etc. Among them, only radio frequency ablation is included in the clinical guidelines o...

AI Technical Summary

Problems solved by technology

[0004] The inventor found that when the existing radiofrequency ablation catheter for the lungs is working, the temperature of the electrode site rises too fast, and the tissue near the electrode becomes dry and charred and forms a "scab", which leads to the stop of the ablation and incomplete ablation

Moreover, the "scab" tissue is adhered to the electrode, and the surrounding organs will be damaged when the device is pulled out.

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