Search PubMed⌕ Search

PubMed · 3754952

The Vienna cochlear implant program.

Abstract

The cochlear implant program in Vienna has now gathered 160 patient years of experience with 25 patients who have received an extracochlear implant prosthesis and 31 patients who have received an intracochlear implant prosthesis. The sound processor avoids the transformation of speech into pulses and provides a processed analog broad-band stimulation signal. Approximately one half of the patients are prelingually deaf. The selection criteria include electrical promontory stimulation and acoustic and electrical brain-stem audiometry. The rehabilitation program consisting of counseling, communication training, and auditory training is considered an important part of the program. The results are assessed using the Vienna Auditory Test battery. Sixty per cent of the postlingually deafened patients achieve some open-set speech understanding without lip-reading. Sixty-five per cent of the users show a substantial improvement in aided speech understanding versus lip-reading alone.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

K Burian, I J Hochmair-Desoyer, B Eisenwort. 1986. The Vienna cochlear implant program.. https://pubmed.ncbi.nlm.nih.gov/3754952/

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

KEEP EXPLORING

Related citations

Auditory steady-state response testing in children: evaluation of a new technology.

OBJECTIVE: The purpose of this study was to evaluate auditory steady-state responses (ASSR) for determining frequency-specific hearing impairment and to compare this technology with conventional auditory brainstem responses (ABR). Study design The study was a prospective clinical trial. Twenty-eight pediatric patients ranging in age from 7 to 61 months who were undergoing sedated ABR testing for evaluation of hearing impairment were also evaluated using ASSR. Estimated audiograms of the ASSR are compared with the ABR results. RESULTS: ASSR estimated audiograms with frequency-specific information were produced for all patients in whom an ABR recording was obtained. In 20 ears in which an ABR tracing was absent at the maximum level of 90 dB, 13 ears had measurable ASSR thresholds with an average threshold of 98.9 dB at 250 to 8000 Hz. CONCLUSION: ASSR showed sensitivity equal to that of ABR for individuals with hearing levels (HL) from 0 to 90 dB HL. In patients with hearing impairment greater than 90 dB normal HL (nHL), ASSR showed distinct advantage over ABR testing in that recordings were reliably produced up to 127 dB nHL.

Audiometry, Evoked Response↗

Acoustic neuroma in patients with completely resolved sudden hearing loss.

Approximately 30% of patients with sudden hearing loss show complete recovery. Researchers have long questioned whether extensive evaluation is necessary in these cases. Recently, however, with the increasing widespread application of magnetic resonance imaging, a higher rate than expected of acoustic neuromas has been detected in patients with sudden hearing loss. Two studies have suggested that affected patients may even partially regain hearing. The aim of the present clinical study was to determine whether acoustic neuroma-induced hearing loss may be associated with full recovery. The files of 67 patients evaluated for sudden hearing loss at Rabin Medical Center from 1989 to 2000 were reviewed. All patients underwent pure tone audiometry, acoustic reflex tests, and auditory brain stem evoked response tests. Hearing evaluation was followed by magnetic resonance imaging scan and, 1 month later, a second hearing test. Findings were compared between patients with and without evidence of tumor on imaging, and between patients with tumor with and without full recovery. Twenty-four patients (36%) had a diagnosis of acoustic tumor, of whom 4 (16.7%) recovered hearing after 1 month. All 4 tumors were intracanalicular. Two of these patients had low-tone hearing loss, and 2 had flat curves; 3 had a pathological auditory brain stem evoked response. Of the 43 patients without tumors, 26 (60%) showed complete resolution of the hearing loss. We conclude that complete recovery of hearing loss does not exclude acoustic tumor, and these patients therefore require full evaluation. The reason for the recovery remains unclear.

Audiometry, Evoked Response↗

Epidemiology of early hearing loss detection in Hawaii.

OBJECTIVE: Universal Newborn Hearing Screening began in 2 Honolulu hospitals in 1992, and by 1999, all 14 civilian birthing facilities in Hawaii were providing screening. Examination of 1998 Hawaii data indicated that approximately 13% of infants who did not pass initial hearing screening in the hospital did not return for the indicated follow-up. The purpose of this study was to determine the epidemiologic profile of infants who were born in 1999 and did not return for follow-up. METHODS: A population-based, cohort study of the hearing screening completion rates among the 13 civilian birthing facilities in Hawaii that provided data to the Department of Health was conducted. Analysis included a bivariate analysis of the demographic characteristics of infants who completed the screening/follow-up process compared with those who did not and logistic regression modeling to ascertain the demographic profile of infants at high risk for being lost to follow-up. RESULTS: Of 12 456 infants, hearing screening data could be linked to the birth certificate file, and a final disposition regarding completion of the screening/follow-up process was determined for 10 328 (83%). Less than 2% (n = 176) of the linked infants failed to complete the screening/follow-up procedures. Low birth weight and white infants and infants born to women who had not completed high school were approximately twice as likely not to complete the screening as were their normal birth weight or nonwhite counterparts. CONCLUSIONS: Failure to complete the hearing screening follow-up may be related to cultural differences that have been previously reported in other maternal and child health studies of the diverse populations in Hawaii. The results of this study will allow the Hawaii Newborn Hearing Screening Program to target its efforts and limited resources toward infants who are at higher risk of not completing the screening and who may need special attention to encourage their mothers to complete the screening process, and to move quickly with rescreening infants whose initial tests are positive so that infants are not lost to follow-up.

Audiometry, Evoked Response↗