Van Baarle P W, Huygen P L, Brinkman W F
Clin Otolaryngol Allied Sci. 1983 Jun;8(3):151-8. doi: 10.1111/j.1365-2273.1983.tb01419.x.
Data on middle ear disease and follow-up was recorded and analysed in 2225 ears operated on for chronic otitis media between 1958 and 1975. The closure rate of tympanic membrane perforations (70-80%) was not influenced by the presence of otorrhoea, but it was significantly lower in patients aged below 15 or over 40 yr and especially when tympanic membrane homograft had been used. For all types of tympanoplasty the mean improvement in air-conduction threshold was most marked at the lower frequencies, being some 10 dB in Type I, 15 dB in Type II and 8 dB in Type III and IV and it decreased by some 3 dB per octave. The combination of cholesteatoma and tympanosclerosis appeared to be rare. The post-operative incidence of otorrhoea was 10-15% after modified radical mastoidectomy and 20-25% after radical mastoidectomy.
对1958年至1975年间因慢性中耳炎接受手术的2225只耳朵的中耳疾病及随访数据进行了记录和分析。鼓膜穿孔的闭合率（70 - 80%）不受耳漏的影响，但在15岁以下或40岁以上的患者中显著较低，尤其是使用鼓膜同种异体移植时。对于所有类型的鼓室成形术，气导阈值的平均改善在低频最为明显，I型约为10 dB，II型为15 dB，III型和IV型为8 dB，且每倍频程下降约3 dB。胆脂瘤和鼓室硬化症的合并情况似乎很少见。改良乳突根治术后耳漏的发生率为10 - 15%，乳突根治术后为20 - 25%。
