1990年3月至1991年8月,40例鼻咽癌随机分组为低氧照射组和照射组各20例。两组鼻咽与颈部照射D_T68～72Gy,5次/周,2Gy/次。低氧组在吸入10.5％氧气2分钟后照射,3分钟结束。两组肿瘤消退剂量、疗后复发、白细胞变化无差异,但出现口干、咽癌距首次放疗时间和口腔粘膜反应,低氧组比对照组晚,程度轻,说明低氧放疗对口腔粘膜有保护作用。 From March 1990 to August 1991, 40 cases of nasopharyngeal carcinoma were randomly divided into hypoxic irradiation group and irradiation group of 20 cases each. Two groups of nasopharyngeal and neck irradiation D_T 68 ~ 72Gy, 5 times / week, 2Gy / time. The hypoxic group was irradiated after inhalation of 10.5% oxygen for 2 minutes, and the end of 3 minutes. There was no difference in relapse doses, relapses after treatment, and leukocyte changes between the two groups, but there were oral and nasopharyngeal carcinomas from the time of first radiotherapy and oral mucous membrane reaction. The hypoxic group was later than the control group and the degree was light, indicating that hypoxia radiotherapy had oral mucosal Protective effects.