Screening with Hearing Tests
Who should undergo screening with hearing tests?
Current recommendations indicate that all newborns before the age of 1 month should undergo screening with hearing tests. If the screening test detects a decrease in hearing, a complete audiological examination should be done before the baby is 3 months of age. Children at high risk for developing hearing loss should undergo regular monitoring till the age of 3 years.
What are the tests done to check for hearing during screening?
The following tests are used for screening for hearing loss:
► Otoacoustic emissions (OAEs): This is a reliable test that detects even mild hearing loss. It can be performed by a non-audiologist as well. A small probe is inserted into the ear canal of the baby and is connected to the recorder in a quiet room. A small sound like a click serves as the stimulus. This results in minute vibrations in a normally functioning inner ear, which are picked up by the probe. The test can be performed in as less as a few seconds. Sometimes, debris or fluid in the ear may result in a wrong diagnosis. In such cases, the test could be repeated or the auditory brainstem response test can be performed.
► Auditory brainstem response (ABR) test: This test is done in those who failed the otoacoustic emissions test. During this test, an electrical response is evoked in response to a click stimulus introduced to earphones placed in the ears, which is recorded using electrodes placed on the head of the baby. The baby may require sedation for this test.
Latest Publications and Research on Hearing Tests in NewbornsComparison of ABR response amplitude, test time, and estimation of hearing threshold using frequency specific chirp and tone pip stimuli in newborns. - Published by PubMed
Higher protein intake strategies in human milk fortification for preterms infants feeding. Auxological and neurodevelopmental outcome. - Published by PubMed