Multi-pole ablation device

Abstract

The invention discloses a radio-frequency ablation instrument and a multi-pole ablation device with the same. The radio-frequency ablation instrument is capable of judging ablation effectiveness according to one or more conditions of an impedance decrease value, an impedance change rate, impedance change rate changes or impedance change from decreasing to increasing. By adoption of a sectional control method and dynamic smoothing for regulating radio-frequency output power, ablation temperature is controlled, quick temperature rise of ablation tissues is avoided, and radio-frequency output power smooth changes in an ablation process is guaranteed. The radio-frequency ablation instrument is further provided with a special protection mechanism for preventing repeated ablation, the temperature of a to-be-ablated part is detected in each-time ablation application, and ablation is not started if the temperature of a to-be-ablated part is higher than 40-60 DEG C. The radio-frequency ablationinstrument and the multi-pole ablation device with the same can be used for sending direct current, alternating current and radio-frequency energy to lesions and used for treatment of lung diseases.

Description

technical field [0001] The invention belongs to the field of minimally invasive medical equipment, in particular to a radio frequency ablation instrument and a multipolar ablation device for transmitting energy in the trachea and bronchi. Background technique [0002] COPD is a progressive disease such as asthma, emphysema, COPD that causes the airways of the lungs to become blocked, restricting the airflow in and out of the lungs. Therefore, patients with COPD present with dyspnea and symptoms such as coughing, wheezing, shortness of breath, chest tightness, and mucus production (asthma attack), which require clinical treatment and treatment, consume a lot of medical resources, and may cause Hospitalization and life-threatening. The causes of COPD are: contraction of airway smooth muscle, excessive mucus secretion by airway glands, thickening of airway wall smooth muscle due to inflammation, and changes in the anatomical structure of tissues around the airway. [0003] Pa...

AI Technical Summary

Problems solved by technology

[0006] The safety and effectiveness of the ablation equipment used in bronchial radiofrequency ablation based on the existing technology have defects, such as the inability to monitor and display the ablation electrode's adhering status; After reaching the set temperature, the temperature rises greatly. This sudden application and (or) sudden change of radio frequency energy has an irritating effect on the patient's respiratory tract, and the large temperature rise poses a threat to the safety of the patient.

In addition, during the treatment process of bronchial radiofrequency ablation, the temperature of the ablation electrode is affected by the change of airflow caused by the breathing movement of the patient, the sliding of the electrode caused by the movement of the chest cavity of the patient, and the change of the sticking degree caused by the unstable grip of the surgeon. Frequent and complex disturbances, the usual proportional-integral control algorithm is prone to oscillation and overshoot, and it is difficult to adapt to these complex external disturbances, thereby interfering with the effect of ablation therapy

[0007] Ideal radiofrequency ablation of the bronchi should avoid repeated ablation at the same site. However, in clinical practice, due to negligence or misoperation by the operator or the lack of prompt function of the equipment used, there is no catheter (electrode) or amount of transfer after the ablation is completed. Insufficient, the ablation will be started again, resulting in repeated ablation at the same site, which will lead to permanent and irreversible damage to the airway tissue, and even cause airway fistula

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