Thermal insulation device for protecting esophagus in frozen balloon catheter cryoablation process of pulmonary veins

Abstract

The invention relates to a thermal insulation device for protecting esophagus in the frozen balloon catheter cryoablation process of pulmonary veins. A balloon wall thermocouple, an intra balloon thermocouple, and a thermal circulating thermal insulation device are arranged in a balloon, and the balloon wall thermocouple and the intra balloon thermocouple are respectively attached onto the inner and outer walls of the balloon to measure the temperature in real time; and the thermal circulating thermal insulation device is connected with a thermal insulation module, and the thermal insulation module is connected with the balloon wall thermocouple, the intra balloon thermocouple and the thermal insulation module to be used for controlling and feeding back the temperature of the balloon, and controlling the cold and heat amount of the thermal circulating thermal insulation device by intelligent match so as to keep the temperature of a pulmonary vein ablation area near the esophagus at 20 to 30 DEG C. The thermal insulation device provided by the invention can be introduced to the cryoablation area through the esophagus natural cavity, the thermal insulation balloon is used in the CBA (Cryoballoon-based Ablation) cryoablation process of pulmonary veins so as to protect the esophagus near the pulmonary vein cryoablation area, prevent esophageal fistula and other serious damages caused by cryoablation, eliminate the limitation of CBA cryoablation treatment of pulmonary veins on atrial fibrillation, and benefit the popularization of CBA catheter ablation of pulmonary veins.

Description

technical field [0001] The invention relates to an esophagus protection device, in particular to a heat preservation device for protecting the esophagus during cryoablation of a pulmonary vein by a cryoballoon catheter (CBA). Background technique [0002] Atrial fibrillation (AF) is the most common pathological arrhythmia in clinical practice. In recent decades, the overall incidence of atrial fibrillation has been on the rise, which may be related to the aging population and the increase in the incidence of cardiovascular diseases. Studies have shown that it is estimated that by 2050, the number of patients with atrial fibrillation in the United States will increase from 2.3 million in 2000 to 5.6 million cases. Atrial fibrillation may cause serious complications such as stroke, causing huge losses to patients and society. How to treat atrial fibrillation has become the focus of current research. The etiology of atrial fibrillation is complex and has not been fully studie...

AI Technical Summary

Problems solved by technology

However, since the cryoballoon needs to stretch the contact part in order to fit the ablation site as closely as possible to the pulmonary vein, and the pulmonary vein is close to the esophagus, coupled with the strong penetrating power of the cryoenergy, when the cryoablation is stopped, the temperature in the esophagus will continue to drop for about 50 seconds. Then it began to rise gradually, and it was difficult to grasp the degree of cryoablation of the esophagus, resulting in obvious damage to the esophagus, which greatly limited the popularization and promotion of CBA catheter ablation

There is still no research to solve the method of cryoablation of pulmonary veins injuring the esophagus by cryoballoon catheter (CBA)

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