PURPOSE:
to study the results obtained in Automated Evoked Auditory Brainstem Response (AABR) with a frequency-specific chirp stimulus.
METHODS:
the AABR with the stimulus HiLo CE-Chirp (r), the intensity of 35 dB NNA, was recorded in 50 newborns (NB) with and without risk factors for hearing loss and compared to the toneburst ABR (TB-ABR). We analyzed the results "pass / refer" for the stimulus HiLo CE-Chirp (r) and the components Hi and Lo, separately, and determined validation measures. The response detection time of AABR was also determined.
RESULTS:
AABR with HiLo CE-Chirp(r) showed high failure (36%) and false positives (33%). Significant differences between the percentages of "failure" between the two components were observed, and the percentage of component failure greater than the Hi Lo, in both ears. The mean of response detection time was 63.8 seconds for the right ear and 77.9 for the left ear, with statistically significant differences between the ears (p = 0.002).
CONCLUSION:
the band stimulus presented limited mean sensing response considerably small, high sensitivity, however, due to high rate of false positives, showed low specificity, there is a need for improvement in technique or stimulus for its future application clinical AABR.
Hearing Tests; Hearing; Infant; Newborn; Hearing Loss
Thumbnail
