冷冻外科或冷冻疗法是利用冷冻对活体组织进行控制性破坏,用以治疗疾病,或缓解症状,破坏肿瘤等。近10～20年来,由于冷冻工业的发展和器械的改进,冷冻外科迅速发展起来。常川的致冷剂有液氮、液态空气、氟利昂,固体CO_2(干冰),高压气体O_2、CO_2等。目前国内耳鼻喉科冷冻治疗用得较多的器械为氧气节流效应冷刀 Cryosurgery or cryotherapy is the use of freezing to control the destruction of living tissue, to treat the disease, or to relieve symptoms, destroy the tumor and so on. Nearly 10 to 20 years, due to the development of the refrigeration industry and equipment improvements, rapid development of frozen surgery. Changchuan refrigerant liquid nitrogen, liquid air, Freon, solid CO_2 (dry ice), high pressure gas O_2, CO_2 and so on. At present, ENT cryogenic treatment with more equipment for the oxygen throttling effect of cold knife