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目的通过大样本的筛查了解新生儿鼓室导抗图特性,收集新生儿的外耳道容积、鼓室压力、声顺值等相关数据,对声导抗测试在新生儿的临床应用中的作用进行初步探讨。方法采用226Hz探测音,对生后1～3天内的2617名(5234耳)正常新生儿进行声导抗测试。结果鼓室导抗图型分为单峰、双峰、平缓、负压四型,各型分别占16.22%、83.38%、0.29%、0.11%;新生儿声顺值的正常范围约为0.34～1.08ml;外耳道容积的正常范围约为0.3～1.0ml;鼓室压力的正常范围约为-121.12～+82.36daPa。结论采用226Hz探测音测得的新生儿鼓室导抗图双峰的比例明显高于单峰,与成人和儿童有明显的区别。
OBJECTIVE: To study the characteristics of neonatal tympanogram, to collect the data of external auditory canal volume, tympanic pressure and acoustic compliance of large infants to screen the role of acoustic impedance test in the clinical application of newborn . Methods Using 226 Hz probe sound, 2617 normal neonates (5234 ears) within 1 ~ 3 days after birth were tested for acoustic impedance. Results Tympanogram was divided into four types: unimodal, bimodal, flat and negative pressure, with each type accounting for 16.22%, 83.38%, 0.29% and 0.11% respectively. The normal range of neonatal compliance was about 0.34-1.08 ml; the normal range of external auditory canal volume is about 0.3 ~ 1.0ml; tympanic pressure is about -121.12 ~ + 82.36daPa. Conclusions The bimodal ratio of neonatal tympanogram measured by 226 Hz probe sound is obviously higher than that of unimodal, which is obviously different from that of adults and children.