Møller H, Tos M
Gentofte Hospital/University of Copenhagen, Hellerup.
J Laryngol Otol. 1990 Dec;104(12):937-41. doi: 10.1017/s0022215100114422.
Previous studies on daily tympanometric screening using an automatic impedance tympanoscope indicated relatively high incidences of type B tympanograms of one day's duration, which is contrary to our conceptions of the pathogenesis and pathology of otitis media with effusion. We therefore repeated the study in 51 otherwise healthy children (100 ears) attending kindergarten. Tympanometry was performed daily for one month using both the conventional impedance apparatus AZ7 and the automatic impedance tympanoscope ZS 331. The impedance apparatus did not indicate any one-day type B tympanograms and only a few short-lasting episodes occurring either in the beginning or end of the study period. Several ears had type B tympanograms on all days examined. The point prevalence was 15 per cent and the period prevalence 17 per cent, which accord well with findings of previous epidemiological studies of secretory otitis. The impedance tympanoscope indicated 16 cases of B-curves lasting only one day and considerably higher point and period prevalences, which make the impedance tympanoscope unsuited for both scientific and clinical purposes.
先前使用自动阻抗鼓室图仪进行每日鼓室图筛查的研究表明，持续一天的B型鼓室图发生率相对较高，这与我们对分泌性中耳炎发病机制和病理的认识相悖。因此，我们对51名在幼儿园就读的健康儿童（100只耳）重复了这项研究。使用传统阻抗设备AZ7和自动阻抗鼓室图仪ZS 331，每天进行一次鼓室图测量，持续一个月。阻抗设备未显示任何持续一天的B型鼓室图，仅在研究期开始或结束时出现了少数短暂的情况。几只耳朵在所有检查日都出现了B型鼓室图。时点患病率为15%，期间患病率为17%，这与先前分泌性中耳炎流行病学研究的结果非常吻合。阻抗鼓室图仪显示有16例B曲线仅持续一天，时点患病率和期间患病率都高得多，这使得阻抗鼓室图仪不适用于科研和临床目的。
