Radiofrequency ablation catheter, lung radiofrequency ablation system, and control method, control device and computer readable storage medium thereof

Abstract

The invention relates to a radiofrequency ablation catheter, a lung radiofrequency ablation system, and a control method, a control device and a computer readable storage medium thereof. The radiofrequency ablation catheter comprises an electrode, wherein the interior of the electrode is provided with a heat exchange medium flow passage; 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, in particular to a radiofrequency ablation catheter, a lung radiofrequency ablation system and a method. 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 of the National Comprehensive Cancer Network for non-small cell lung cancer. [0003] The ...

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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.

[0005] Most of the heads of the existing radiofrequency ablation catheters used in the lungs cannot be bent, so that the front-end electrodes of the radiofrequency ablation catheters cannot easily reach the target position on the side

[0006] Existing radiofrequency ablation catheters cannot effectively control the ablation range, and cannot timely judge whether the ablation range is appropriate

The ablation range is small, the ablation is not complete, and there is a risk of recurrence; the ablation range is large, and the surrounding normal tissues and organs may be accidentally injured

[0007] Even under the guidance of B-ultrasound or CT, the existing radiofrequency ablation operation cannot effectively judge the exact position of the front-end electrode of the radiofrequency ablation catheter

CT images are a limited number of cross-sectional images obtained by X-ray scanning. At certain angles, it seems that the front-end electrode is placed on the target site, but the actual position may be wrong, and it is only overlapping in the projection direction. Therefore, the front-end The position of the electrode is difficult to judge, and the positioning accuracy is not enough

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