[The audiological characteristics of infants failed in hearing screening].

OBJECTIVE

To investigate the characteristic and the hearing change of hearing thresholds of the infants failing in the hearing screening.

METHOD: 802 infants (1,179 ears) with hearing screening record were reviewed in the study. They had hearing screened by otoacoustic emissions (OAE). However, they failed in the first or and second hearing screening. Auditory brainstem response (ABR), distortion product otoacoustic emissions (DPOAE) and acoustic immittance measurement were examined. Subjects with abnormal hearing-evaluation were retested during the following 1-3 months (before 6-month-old). To analysis the characteristic and the hearing change of hearing thresholds of the tests.

RESULT: Among 802 cases (1,179 ears), the ratio of single-ear (53.2%) is higher than both-ears (39.5%), P<0.05. And there are no significance between the two groups in the ration of severe abnormal hearing-evaluation; 25.8% infants once suffered from hypercholesterolemia failed in the hearing screening,which was higher than the other known risk factors. P<0.05; Threatened abortion group has found no cases of severe hearing abnormalities; The ratio of severe abnormal hearing-evaluation in family history hearing loss group (40.9%) was higher than other high-risk factors, followed by two or more risk factors group (10.8%); 56.9% of the infancy who did not pass the hearing screening were found none risk factors, 42.3% of the infancy who had high risk factors was normal hearing level; 96 cases (138 ears) undergone twice assessment, in moderate disorder group, more cases (74.3%) changed better, and less disorder group (40.9%), severe disorder group (33.3%). Seven ears became worse; Among abnormal hearing induced by different high-risk factors, the proportion of hearing improvement in children with moderate abnormal hearing was higher than that in children with slight abnormal hearing. Ten cases (12 ears) diagnosis auditory neuropathy.

CONCLUSION

The important factors make the follow-up decision including perinatal history, hearing level and age. Maybe some high-factors we did not realized. Gene screening should be paid more attention in the future work.