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为早期发现慢性化脓性中耳炎患者耳聋中的感音神经性成分,作者对59例18～60岁的患者和10名听力正常人做了扩展频谱的骨导测听并与常规纯音测听结果做了比较。30例慢性化脓性中耳炎患者中12例常规测听骨导正常,其中4例扩展频谱(12与16KHz)骨导听阈在0～5dB,8例升高15～25dB,说明存在着内耳功能紊乱。18例常规纯音测听骨导下降15～20dB的病人,扩展频谱骨导听阈升高的更明显,12KHz平均达24.2±2.5dB,16KHz达14.2±2.8dB。进一步分析证明经常急性发作的病人扩展频谱骨导听阈升高的较不常急发者多。中上鼓室炎患者比单纯中鼓室炎和单纯上鼓室炎患者升高的多。29例鼓膜干穿孔患者12和16KHz骨导阈平均升高25～27dB。距最后一次急发不超过一年的患者比超过一年者升高的多;经常急发者比不经常复发者升高的多。对20KHz的超
For the early detection of sensorineural components of deafness in patients with chronic suppurative otitis media, the authors did a bone-conduction test of 59 patients 18 to 60 years of age and 10 normal-hearing adults and compared them with the conventional pure tone audiometry A Of the 30 patients with chronic suppurative otitis media, 12 cases had normal audiograms with normal bone conduction. Among them, 4 cases of extended spectrum (12 and 16 kHz) had a bone conduction threshold of 0 ~ 5 dB and 8 cases increased by 15 ~ 25 dB, which indicated that there were disorders of inner ear. In 18 patients with conventional pure tone audiometry with a 15-20 dB decrease in bone conduction, the BSP increased more significantly at 12 kHz and 24.2 ± 2.5 dB at 16 kHz and 14.2 ± 2.8 dB at 16 kHz. Further analysis showed that patients who had a frequent acute episode had more spread of bone conduction thresholds than those who were less frequent. Patients with upper tympanitis were significantly more likely to develop tympanitis and meningitis alone. 29 cases of tympanic membrane perforation in patients with 12 and 16KHz bone conduction threshold average increase of 25 ~ 27dB. Patients who were up to one year longer than the last had a much higher rate than those who had more than one year; those who had frequent attacks had a much higher rate of recurrence than those who did not. Super 20KHz