Owens J J, McCoy M J, Lonsbury-Martin B L, Martin G K
Department of Otorhinolaryngology and Communicative Sciences, Baylor College of Medicine, Houston, Texas.
Am J Otol. 1993 Jan;14(1):34-40.
The clinical utility of otoacoustic emissions (OAEs) has been well established in adults. The purpose of this investigation was to determine the efficacy of OAE testing in children. Distortion-product OAE (DPOAE) audiograms, response/growth functions, and transiently evoked OAEs elicited with clicks were measured from the ears of both healthy volunteers, aged 4 to 13 years, and children with confirmed middle ear disorders. These measures established the means and variabilities for DPOAE and noise-floor amplitudes of normal and diseased young ears. Compared with adult emissions, the healthy young ears exhibited greater mean DPOAE and noise-floor amplitudes. In contrast, ears with type B and type C tympanogram patterns showed absent or markedly reduced OAE amplitudes, when compared with emissions measured in their control counterparts. Finally, ears with ventilating tubes exhibited OAE amplitudes lower than amplitudes from healthy ears, but higher than those of the untreated diseased ears. Although these findings imply that using OAEs to test the outer hair-cell reserve of infected ears is problematic, emitted responses provide useful information concerning the normalcy of middle ear function.
耳声发射（OAE）在成人中的临床应用已得到充分证实。本研究的目的是确定OAE测试在儿童中的有效性。对4至13岁的健康志愿者以及确诊患有中耳疾病的儿童的耳朵进行测量，获取畸变产物耳声发射（DPOAE）听力图、反应/增长函数以及短声诱发的瞬态耳声发射。这些测量确定了正常和患病幼儿耳朵的DPOAE及本底噪声幅值的均值和变异性。与成人耳声发射相比，健康幼儿的耳朵表现出更高的平均DPOAE和本底噪声幅值。相比之下，与对照侧测量的耳声发射相比，呈B型和C型鼓室图的耳朵显示耳声发射幅值缺失或明显降低。最后，置有通气管的耳朵的耳声发射幅值低于健康耳朵，但高于未经治疗的患病耳朵。虽然这些发现表明使用耳声发射来测试受感染耳朵的外毛细胞储备存在问题，但发射反应可提供有关中耳功能正常与否的有用信息。
