Search PubMed⌕ Search
Home/Archive/PubMed

PubMed · 502503

Toward objective analysis for electroencephalic audiometry.

M C Vivion·K E Wolf·R Goldstein·J E Hirsch·W H McFarland
View original source ↗Export metadata ↓

Abstract

Middle-component AERs (8-90 msec) to tone-pips from 10 normal-hearing adults were subjected to three objective methods of response identification. Threshold was then determined for each subject according to four different rules. The criterion score, which considers conjointly latency and amplitude values across the middle-component peaks, was developed as a single-value measure for response-identification and subsequent threshold-determination procedures. One of the response-identification methods was applied to 10 hearing-impaired subjects; the results of the threshold-determination procedures were encouraging. Further directions toward improving objective response analysis are discussed.

Explore related subjects

AudiometryAudiometry, Evoked ResponseAuditory ThresholdEvoked PotentialsHearing DisordersHumansTime FactorsComparative StudyJournal ArticleResearch Support, U.S. Gov't, P.H.S.

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

M C Vivion, K E Wolf, R Goldstein, J E Hirsch, W H McFarland. 1979. Toward objective analysis for electroencephalic audiometry.. https://doi.org/10.1044/jshr.2201.88

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2001

The site of the hearing loss in Refsum's disease.

Refsum's disease is a disorder of lipid metabolism with pigmentary retinopathy, demyelinating neuropathy, ataxia, and hearing loss. Previous histological studies have located the site of hearing impairment in the inner ear, but it has never been confirmed audiologicaly in the literature. In this reported case of Refsum's disease, despite hearing loss and absence of response in ABR, robust otoacoustic emissions were measured. Together with these and other audiological findings, we conclude that our case might be the first reported case of Refsum's disease with auditory neuropathy. The site of the hearing abnormality in Refsum's disease may be 'post-outer hair cells' in some cases as in the current case. Because of their limited benefits and risk of noise-induced damage to outer hair cells, the use of hearing aids before otoacoustic emission measurements should be considered cautiously in Refsum's disease.

Audiometry↗
PubMed2001

Hearing habilitation with auditory brainstem implantation in two children with cochlear nerve aplasia.

Patients with aplasia and hypoplasia of the cochlear nerve have no chance of having their hearing restored by stimulating the periphery of the auditory system using the traditional cochlear implant. A possible approach to auditory rehabilitation may be direct electrical stimulation of the cochlear nuclei with an auditory brainstem implant (ABI). Recently, two children, aged 4 and 3 years, respectively, with bilateral severe cochlear malformations and cochlear nerve aplasia received an ABI. The present paper reports the technique and the preliminary results of this experience. The classic retrosigmoid approach was used. The correct position of the electrodes was estimated with the aid of EABRs and neural response telemetry (NRT). No postoperative complications were observed. High-resolution CT scans with a bone algorithm reconstruction technique were taken postoperatively to evaluate electrode placement before discharge. The ABI was activated 30 days after implantation in both patients. To date 16 and 13 electrodes, respectively, have been activated in the two children. Three months after activation the first patient had achieved good environmental sound awareness, good speech detection and some speech discrimination. The second child, 1 month after activation, had achieved good environmental sound awareness and moderate speech detection. To the best of our knowledge this is the first report of patients with hypoplasia of the cochlea and aplasia of the cochlear nerve, aged below 5 years and treated with an ABI.

Audiometry↗
PubMed2001

Volunteer-based universal newborn hearing screening program.

OBJECTIVE: To evaluate efficacy and costs of a volunteer-based universal newborn hearing screening program. METHODS: The Lucile Packard Children's Hospital at Stanford newborn hearing screening program database was reviewed. Results and costs of the hearing screens were analyzed. RESULTS: Hearing screens were performed on 5771 newborns treated in the well-baby nursery and nine infants from this population were identified with hearing loss, seven of whom had no risks factors for hearing loss. Using volunteers to perform the first-line screen with the automated auditory brainstem response (AABR) technology, 91% of infants registered for screening were evaluated prior to discharge. An additional 4% of infants were screened as outpatients. If an infant failed the AABR on two occasions, he or she was rescreened with the AABR or transient evoked otoacoustic emissions by a licensed audiologist, often while the infant was still in the hospital. Using this algorithm, 5% of infants tested in the well-baby nursery needed additional follow-up as an outpatient. Cost analysis of this volunteer-based program reveals a per/baby screening cost of $27.41. CONCLUSIONS: A volunteer-based hearing screening program is a viable option for hearing screening in well-baby nurseries but does not result in significant cost savings during the first 2 years of the program.

Audiometry↗