Optimum click rate for neurodevelopmental evaluation using auditory brainstem response in premature infants

Area of Science:

• Neuroscience
• Developmental Pediatrics
• Audiology

Background:

• Auditory Brainstem Evoked Response (ABR) is crucial for neurodevelopmental assessment in preterm infants.
• Determining the optimal Click Rate (CR) for ABR testing can enhance diagnostic accuracy and efficiency.

Purpose of the Study:

• To identify the optimal Click Rate (CR) for neurodevelopmental assessment using Auditory Brainstem Evoked Response (ABR) in preterm infants.
• To compare the efficacy of different CRs (19.9/s, 29.9/s, 69.9/s) in eliciting reliable ABR responses.

Main Methods:

• A prospective study involving 17 preterm infants at 34 weeks' postmenstrual age.
• Three ABRs were conducted per infant using CRs of 19.9/s, 29.9/s, and 69.9/s.
• Optimal CR was defined as the rate yielding the highest frequency of identifiable and measurable ABR wave I, III, and V responses.

Main Results:

• A 100% pass rate was observed for CRs of 29.9/s and 19.9/s, significantly higher than the 82% pass rate at 69.9/s.
• No significant differences in wave latencies, interpeak latencies, or amplitudes were found between 19.9/s and 29.9/s CR.
• The standard deviation of interpeak latencies was smaller at 29.9/s CR compared to 19.9/s CR.

Conclusions:

• A CR of 29.9/s is recommended as optimal for ABR-based neurodevelopmental assessment in preterm infants.
• The lower variance in interpeak latencies at 29.9/s CR potentially reduces sample size requirements, leading to decreased costs and time.
• This finding supports optimizing ABR testing protocols for improved clinical utility in neonatal care.