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Device and method for improved safety and efficacy for cryoablation
Device and method for improved safety and efficacy for cryoablation
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机译:提高冷冻消融安全性和有效性的装置和方法
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摘要
A method and system for improved lesion creation. The method generally includes positioning a treatment element of a medical device proximate an area of target tissue and operating a control unit in accordance with a duty cycle, that includes at least one freeze-warm cycle, each freeze-warm cycle including: supplying coolant to the treatment element at a first flow rate that causes the treatment element to reach a first temperature, the first temperature causing ablation of the target tissue and cryoadhesion between the treatment element and target tissue, and supplying coolant to the treatment element at a second flow rate that causes the treatment element to reach a second temperature, the second temperature being higher than the first temperature and the second flow rate being lower than the first flow rate, the second temperature being above a temperature at which ablation occurs and below a temperature at which cryoadhesion is broken.
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