An automated auditory brainstem response (AABR) testing apparatus (Natus ALGO 2
®) was used to auditorily screen neonates born at our hospital to identify those with congenital deafness. Screening was conducted in 1, 321 (86.6%) of 1, 525 neonates born from February 1999 to January 2001.Screening was explained to guardians of neonates to obtain consent before the procedure. Mean neonate body weight was 3047.5g and mean gestational age 274.6 days.
Screening was conducted in the neonates whose guardians gave consent and was repeated in those judged to need referral or those in whom the first screening could not be done due to noncooperation. Neonates judged to need referral after the second screening were examined by pediatricians and otolaryngologists. Those who needed detailed investigation were referred to a specialist hospital.
The first screening test was passed by 1, 300 neonates and failed by 21 (1.6%). The final result was that the test was passed by 1, 318 neonates and failed by 3 (0.2%). All the 3 neonates who were finally judged to need referral were found to have moderate or severe deafness in subsequent detailed investigation. Comparison of parameters between groups that passed and failed the first screening showed a significant difference in familial deafness (0.4% of the group that passed versus 14.3% of the group that failed). No significant differences were seen in any other parameters tested, including age, body weight, and gestational age.
The AABR test for neonates auditory function was found to be an effective screening method for early detection of congenital deafness. When screening detected abnormalities, cooperation was needed among pediatricians, otolaryngologists, and speech therapists. It thus appears important to establish a management program for deaf neonates when using this screening.
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