Palmu Arto, Rahko Tapani
National Public Health Institute, Helsinki, Finland.
Int J Audiol. 2003 Sep;42(6):327-30. doi: 10.3109/14992020309101325.
The objective of this study was to determine normative values for tympanometric variables for 4-5-year-old children. Tympanometry was performed at a pre-scheduled visit at the age of 49-68 months on children recruited to a follow-up visit in a vaccine efficacy trial (n=756 children). Tympanograms obtained successfully from healthy ears were analysed. At the time of the visit, mean static acoustical admittance (SAA) was 0.52 cm3, mean tympanometric peak pressure (TPP) was -48 daPa, and mean tympanometric width (TW) was 101. Compared to results obtained for the same study population at 24 months of age, the SAA had increased significantly with age, while the values for TPP and TW had decreased with age. A history of previous tympanostomy tubes increased the admittance of the tympanic membrane by producing atrophic scars. Thus, the tympanograms obtained from ears with previous tubes were considerably higher and narrower (high SAA and low TW). In conclusion, this study further emphasizes the need for age-specific normative values for interpretation of SAA and TW.
本研究的目的是确定4至5岁儿童鼓室导抗图变量的标准值。对入选疫苗效力试验随访的儿童（n = 756名儿童）在预定的49至68月龄访视时进行鼓室导抗测试。对从健康耳成功获得的鼓室导抗图进行分析。在访视时，平均静态声导纳（SAA）为0.52 cm³，平均鼓室导抗峰压（TPP）为 -48 daPa，平均鼓室导抗宽度（TW）为101。与在24月龄时对同一研究人群获得的结果相比，SAA随年龄显著增加，而TPP和TW的值随年龄下降。既往鼓膜置管史通过产生萎缩性瘢痕增加了鼓膜的导纳。因此，从有既往置管史的耳朵获得的鼓室导抗图明显更高且更窄（高SAA和低TW）。总之，本研究进一步强调了对于SAA和TW的解读需要有年龄特异性的标准值。
