Method, system and medium for controlling cryoablation temperature

Abstract

The present application relates to a cryoablation temperature control method, system and medium. The method is used to control the temperature in the cryoablation balloon, including: according to the acquired real-time temperature value and preset target temperature value in the balloon , and / or the real-time gas flow value and the target gas flow value in the gas recovery channel in the exhaust channel of the balloon generate a first target liquid inlet pressure control signal to control the high pressure ratio in the liquid supply channel of the balloon The liquid supply flow rate of the valve; according to the obtained real-time air pressure value and the preset target air pressure value of the exhaust side of the balloon, a first target exhaust pressure control signal is generated to control the air pressure in the exhaust passage of the balloon The exhaust flow rate of the low-pressure proportional valve is controlled in conjunction with the first target liquid inlet pressure control signal, so that the pressure value in the balloon is within the preset safety threshold range and the temperature in the balloon reaches and / or maintains the target temperature value. The application has wide temperature control range, high precision and short operation time.

Description

technical field [0001] The application belongs to the technical field of medical devices, and in particular relates to a cryoablation temperature control method, system and medium. Background technique [0002] Cryoablation, as a new surgical method for the treatment of atrial fibrillation, has received extensive attention in recent years. Its working principle is to take away the tissue heat through the heat absorption and evaporation of the liquid refrigerant, lower the temperature of the target ablation site, "freeze to death" the cell tissue, thereby destroying the area with abnormal electrophysiological activity, so as to achieve the purpose of treating arrhythmia. A large number of clinical data show that compared with other ablation methods, cryoablation is easier for doctors to learn and operate, shortens the operation time, has high therapeutic effectiveness, reduces severe complications such as thrombosis, and reduces pain for patients. [0003] However, the tradi...

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Problems solved by technology

[0003] However, the traditional cryoablation system uses a fixed flow rate control during the ablation stabilization process. The longer the ablation time, the lower the temperature, and it cannot be kept at a lower temperature. In order to prevent risks, the only way to stop the ablation is to wait until the temperature returns Performing the next cycle of ablation not only increases the difficulty of the operation, prolongs the operation time, but also increases the risk during the operation, resulting in poor isolation of the pulmonary veins and large side effects on the tissue caused by the operation.

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