Cryoablation temperature control method and system and medium

Abstract

The application relates to a cryoablation temperature control method and system and a medium. The method is used for controlling the temperature in a cryoablation balloon, and comprises the followingsteps: generating a first target liquid inlet pressure control signal according to an acquired real-time temperature value in the balloon and a preset target temperature value and / or a real-time gas flow value in a gas recovery channel in an exhaust passage of the balloon and a target gas flow value, so as to control the liquid supply flow of a high-pressure proportional valve in a liquid supply passage of the balloon; generating a first target exhaust pressure control signal to control the exhaust flow of a low-pressure proportional valve in the exhaust passage of the balloon according to theacquired real-time air pressure value on the exhaust side of the balloon and a preset target air pressure value, and cooperating with the first target inlet pressure control signal to control the pressure value in the balloon within a preset safety threshold range and make the temperature in the balloon reach and / or maintain the target temperature value. The cryoablation temperature control method and system and the medium have the advantages of wide temperature control range, high precision and short operation time.

Description

Technical field [0001] This application belongs to the technical field of medical devices, and specifically relates to a cryoablation temperature control method, system and medium. Background technique [0002] As a new surgical method for the treatment of atrial fibrillation, cryoablation has received widespread attention in recent years. Its working principle is to take away the heat of the tissue through the heat absorption and evaporation of the liquid refrigerant, so that the temperature of the target ablation site is lowered, and the cell tissue is "freeze to death", thereby destroying the abnormal electrophysiological activity area to achieve the purpose of treating arrhythmia. A large amount of clinical data shows that compared with other ablation methods, cryoablation is easier for doctors to learn and operate, shorten the operation time, have high treatment effectiveness, reduce thrombosis and other serious complications, and reduce the pain of patients. [0003] However...

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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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