Automated and conventional ABR screening techniques in high-risk infants.

Test validity is determined by the proportion of results that are diagnostically confirmed and predicted on the measures used to identify the disease process. This article summarizes the results of a series of 224 stable high-risk infants who were screened by automated (ALGO-1) and conventional (Bio-logics LT) ABR instrumentation. Failure criteria was defined as the absence or prolongation of a replicable wave V response (conventional) or Refer by the automated system. The overall failure rates at a 35 dB screening level were comparable between devices. Sensitivity and specificity measures for the ALGO-1 unit were 100 and 96 percent, respectively. Permanent hearing loss was demonstrated in 5 percent of the newborns screened in this study. Advantages of the automated system include a dual artifact rejection system, attenuating ear couplers, and a battery operated design. These findings suggest that the automated ABR screener is a viable alternative to conventional ABR instrumentation for the limited purpose of neonatal auditory screening.