Abstract
Cryoablation is a minimally invasive interventional therapy for the treatment of atrial fibrillation, but its current temperature measurement in ablation region is deficient during operation. In this study, a flexible device with multi-positional microsensors for temperature detection of ablation region is proposed, which can be attached to the surface of the medical cryoballoon to provide multi-positional temperature information. And the device makes up for the deficiency that current cryoablation catheter only detects the internal temperature of cryoballoon during surgery. In the temperature range from 295 K to 200 K, the static and dynamic characteristics of the device prove its high repeatability, linearity, and a response time of 0.3 s is obtained. In the meantime, the first-order inertial step response curve of the sensor is given. Finally, the ability of the flexible sensors to temperature detection is verified by simulation experiment based on pulmonary vein ostium agar model and ex vivo porcine heart cryoablation experiment.
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