近年来由于冷冻技术的飞跃发展,冷冻外科已应用于医学的各个方面。自1966年以来文献中不断有关于冷冻疗法治疗颌面部血管瘤的报道。作者利用家兔做液氮和C0_2雪实验,证明:液氮“喷射”法具有最好的冷冻效果。应用接触法与组织接触的部位温度达-195℃,经过60秒钟后表面温度明显升高,但深层组织的温度有继续下降之趋势。CO_2雪仅能冷 In recent years, due to the rapid development of cryogenic technology, cryosurgery has been applied to various aspects of medicine. Since 1966, there have been reports of cryotherapy for maxillofacial hemangiomas in the literature. The authors used rabbits for liquid nitrogen and C0_2 snow experiments to prove that the liquid nitrogen “jetting” method has the best freezing effect. The temperature of the site of contact with the tissue by the contact method was -195°C. After 60 seconds, the surface temperature increased significantly, but the temperature of the deep tissue continued to decrease. CO_2 snow can only be cold