我科自1973年12月到1976年2月用冷冻疗法治疗慢性鼻炎、鼻衄、血管瘤、乳头状瘤、鼻咽纤维血管瘤、恶性黑色素瘤、黑痣、扁桃体残体等疾病161例,共行冷冻465次。所用器械为南京电子管厂和我院协作研制的简易式液氮冷冻器和SD—ZI型自动可控液氮深低温治疗机和上海产D2—1型低温治疗器。现将治疗实践过程中的初步体会 In our department, from December 1973 to February 1976, we used cryotherapy to treat 161 cases of chronic rhinitis, epistaxis, hemangiomas, papilloma, nasopharyngeal fibroangioma, malignant melanoma, melanoma, tonsillar debris and other diseases. Totally frozen 465 times. The equipment used was a simple liquid nitrogen chiller and SD-ZI automatic controlled liquid nitrogen cryogenic treatment machine jointly developed by Nanjing Electron Tube Factory and our hospital, and Shanghai D2-1 cryogenic treatment device. The preliminary experience in the process of treatment