不同日龄新生儿诱发性耳声发射测试

对20例正常新生儿在出生后第1～5天逐日行瞬态诱发性耳声发射(TEOAE)和畸变产物耳声发射(I)POAE)的测试。了解不同日龄新生儿畸变产物耳声发射(DPOAE)和瞬态诱发性耳声发射(TEOAE)的特征，探讨应用OAE作新生儿听力筛查的最佳时机。随新生儿日龄的增加，其TEOAE和DPOAE检出率和反应幅值逐步提高，新生儿生后第1～2天的检出率和反应幅值显著低于第3～5天，至生后第3～5天．TEOAE和DPOAE检出率接近或达到100％，反应幅值也趋于稳定。结论：应用TEOAE和DPOAE进行新生儿听力筛查时，其日龄至少应在3天或3天以上，测试TEOAE和DPOAE快速、方便，不失为普遍性新生儿听力筛查首选方法。

EVOKED OTOACOUSTIC EMISSION IN DIFFERENT AGES OF NEONATES

Objective To investigate the basic properties of distortion product otoacoustic emissions (DPOAE) and transient evoked otoacoustic emissions (TEOAE) in different ages of neonates, and search for a optimal time of neonatal hearing screening by evoked otoacoustic emissions (EOAE) . Methods TEOAE and DPOAE were recorded daily from 1 to 5 days postpartum in 20 healthy newborns. Results The prevalence and response levels of TEOAE and DPOAE increased gradually with age. In 1 or 2 days, the prevalence and response levels were significantly lower than that in the following days. By the third to the fifth day, the prevalence approached or rose to 100% and the response levels tended to stability. Conclusion Newborns should be screened with OAE after 3 days of age. OAE is an objective, rapid and noninva-sive technigue, and it is the first choice of universal neonatal hearing screening.