Biomedical subjects

L R Aubert

Publications and source records attributed to L R Aubert.

2 recordsLinked to original sources

PubMed1994

Reliability and predictive value of the electrically evoked auditory brainstem response.

The reliability and predictive value of the low-pulse-rate electrical auditory brainstem response (EABR) threshold and the high-pulse-rate psychophysical threshold used in electrode mapping of adult cochlear implant patients was assessed. Eight patients, all implanted with the Nucleus multi-channel cochlear implant and experienced users, participated in this study. The relationship between like pulse rates of the EABR and psychophysical thresholds was assessed and showed high correlations of 0.90 or higher. When the relationship between low-pulse-rate EABRs and high-pulse-rate psychophysical thresholds was assessed the correlation was much poorer. The best correlation of 0.75 was shown between a 30-Hz EABR and the 500-Hz psychophysical threshold. This suggests that the low-pulse-rate EABR threshold is a poor predictor of the high-pulse-rate psychophysical threshold used in electrode mapping. Hence, if the EABR is to be a clinical tool for setting the electrodes it should be used cautiously and with the proper correction formula applied.

Adolescent↗

PubMed1993

Comparison of two methods of data presentation for the electrical brainstem response in cochlear implant patients.

Cochlear implants have become an acceptable method for management of the deaf patient, adult and child alike. Since the advent of implants there has been much research into objective methods for setting electrode values. The most common method is the electrical auditory brainstem response (EABR). The result of EABR threshold measurement is frequently reported as an arbitrary stimulus level set by the manufacturer. However, there has been recent discussion of whether an arbitrary stimulus level is acceptable or if the results should be reported in absolute units, either charge or current, particularly when combined data are used. This report compares two methods of data presentation for the EABR, arbitrary stimulus level and absolute units measured in nanoCoulombs (nC). Data collected from a previous study were used in this comparison. All patients were fitted with the Nucleus multi-channel device and Mini Speech Processor. The correlation between stimulus level and log charge (nC) was 0.990 with a slope of 0.987 which suggests the method of data reporting does not alter EABR results materially when using the Nucleus device.

Adolescent↗