Reproducibility of auditory brain-stem evoked responses as a function of the stimulus, scorer and subject

摘要: The reproducibility of auditory brain-stem evoked response (ABR) measurements was determined in a series studies. ABRs were recorded from pre-term (32 and 36 weeks) newborns, term adults to 3 different stimuli. Records scored blindly with no knowledge the subject, stimulus eliciting response, or other records by that subject. Two scorers (inter-scorer reliability) single scorer over time (intra-scorer could score using explicit criteria high degree agreement. In contrast variability between replicate same subject considerable. Intra-subject not strongly affected age but function (the low intensity fast repetition rate stimuli elicited more variable responses than loud, slow stimuli) wave measured (wave I latency significantly measurements). Healthy, newborns studied investigate first few days after birth. There rapid reduction ABR 6-12 h birth gradual thereafter. prolonged latencies observed immediately associated an elevation threshold. vaginal cesarean deliveries. These effects for amplitude ABR, trends generally significant. Despite large changes within birth, some correlated sessions separated all intervals tested, ranging 2 days.