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1990年1月至l996年8月，65例鼻咽癌分别在放疗前、结束后，部分患者在放疗后≥2年及15例鼻咽癌局部复发再放疗前、后作电测听检查。均有自身听力对照。感音听力损伤发生率放疗后≥2年者为31%（18/58耳），复发再放疗者为50%（15／30耳），总听力损伤在面颈大野组为64．3%（18／28耳），小野组为30％（9/30耳〕。在鼻咽Dr70Gy时内耳DT从40．3～54.2Gy。感音听力损伤在年龄＜49岁者为10．7％（3／28耳），与年龄≥49岁者为50%（15／30耳），P＜0．01。
From January 1990 to August 1996, 65 cases of nasopharyngeal carcinoma were performed before and after radiotherapy, and some patients were used for electrical audiometry after ≥2 years after radiotherapy and before and after 15 cases of local recurrence of radiotherapy for nasopharyngeal carcinoma. Have their own hearing control. The incidence of sensorineural hearing loss was 31% (18/58 ears) after radiotherapy for ≥ 2 years, 50% (15/30 ears) for recurrence and radiotherapy, and 64.3% of total hearing loss in Minojo Group. 18/28 ears), 30% (9/30 ears) in the Ono group, 40.3 to 54.2 Gy in the inner ear and 70.7% in the age of <49 years in the nasopharyngeal Dr70Gy (3). /28 ears), and 50% (15/30 ears) with age ≥ 49 years, P <0.01.