This study included 25 adult patients (mean age at implantation 57.5 years). There was a statistically significant improvement in the average SSQ score in all three sections of the questionnaire with the use of the BAHA. Our patients experienced most marked benefits in speech hearing in challenging listening situations. All patients remain consistent users and there has been no explantation to date.
BackgroundIndividuals with a unilateral severe-to-profound hearing loss, or single-sided deafness, report difficulty with listening in many everyday situations despite having access to well-preserved acoustic hearing in one ear. The standard of care for single-sided deafness available on the UK National Health Service is a contra-lateral routing of signals hearing aid which transfers sounds from the impaired ear to the non-impaired ear. This hearing aid has been found to improve speech understanding in noise when the signal-to-noise ratio is more favourable at the impaired ear than the non-impaired ear. However, the indiscriminate routing of signals to a single ear can have detrimental effects when interfering sounds are located on the side of the impaired ear. Recent published evidence has suggested that cochlear implantation in individuals with a single-sided deafness can restore access to the binaural cues which underpin the ability to localise sounds and segregate speech from other interfering sounds.Methods/DesignThe current trial was designed to assess the efficacy of cochlear implantation compared to a contra-lateral routing of signals hearing aid in restoring binaural hearing in adults with acquired single-sided deafness. Patients are assessed at baseline and after receiving a contra-lateral routing of signals hearing aid. A cochlear implant is then provided to those patients who do not receive sufficient benefit from the hearing aid. This within-subject longitudinal design reflects the expected care pathway should cochlear implantation be provided for single-sided deafness on the UK National Health Service. The primary endpoints are measures of binaural hearing at baseline, after provision of a contra-lateral routing of signals hearing aid, and after cochlear implantation. Binaural hearing is assessed in terms of the accuracy with which sounds are localised and speech is perceived in background noise. The trial is also designed to measure the impact of the interventions on hearing- and health-related quality of life.DiscussionThis multi-centre trial was designed to provide evidence for the efficacy of cochlear implantation compared to the contra-lateral routing of signals. A purpose-built sound presentation system and established measurement techniques will provide reliable and precise measures of binaural hearing.Trial registrationCurrent Controlled Trials http://www.controlled-trials.com/ISRCTN33301739 (05/JUL/2013)
Good speech perception can be achieved in some cases, and CI should be considered as an option for auditory rehabilitation in patients with VS.
FOX computer-assisted fitting can be successfully used at switch on, in different clinical environments, reducing fitting time in the first 2 weeks and is efficient at providing a usable program.
Objectives: The average life expectancy in the United Kingdom is currently nearly 80 years for a newborn baby with nearly 15% of the population, by 2040, being >75 years old. Hearing impairment is a common disability in the elderly individual, and there have been significant drives to support this population to lead longer and healthier working lives. We aimed to assess the long-term audiological and health-related quality-of-life benefits of cochlear implants (CI) in elderly individuals. Methods: A retrospective and cross-sectional study of patients who received a CI at ≥70 years. Data extracted included speech perception scores, adverse events, telephone use, and patient-reported outcome measures using the Glasgow Benefit Inventory questionnaire with a minimum of 12 months follow-up. Results: Sixty-four patients aged ≥70 years received a unilateral CI. A significant improvement in speech perception scores in all conditions was noted with no significant difference between differing age groups. Glasgow Benefit Inventory scores showed a significant positive impact on patients’ lives and their health status, with no significant difference between the differing age groups. Conclusions: Cochlear implantation is a safe and well-tolerated procedure in the elderly patients with significant improvements observed in audiological performance, health status, and social interactions.
The deliberate addition of Gaussian noise to cochlear implant signals has previously been proposed to enhance the time coding of signals by the cochlear nerve. Potentially, the addition of an inaudible level of noise could also have secondary benefits: it could lower the threshold to the information-bearing signal, and by desynchronization of nerve discharges, it could increase the level at which the informationbearing signal becomes uncomfortable. Both these effects would lead to an increased dynamic range, which might be expected to enhance speech comprehension and make the choice of cochlear implant compression parameters less critical (as with a wider dynamic range, small changes in the parameters would have less effect on loudness). The hypothesized secondary effects were investigated with eight users of the Clarion cochlear implant; the stimulation was analogue and monopolar. For presentations in noise, noise at 95% of the threshold level was applied simultaneously and independently to all the electrodes. The noise was found in two-alternative forcedchoice (2AFC) experiments to decrease the threshold to sinusoidal stimuli (100 Hz, 1 kHz, 5 kHz) by about 2.0 dB and increase the dynamic range by 0.7 dB. Furthermore, in 2AFC loudness balance experiments, noise was found to decrease the loudness of moderate to intense stimuli. This suggests that loudness is partially coded by the degree of phase-locking of cochlear nerve fibers. The overall gain in dynamic range was modest, and more complex noise strategies, for example, using inhibition between the noise sources, may be required to get a clinically useful benefit.
Pádraig T. (2016) Preliminary assessment of the feasibility of using AB words to assess candidacy in adults. Cochlear Implants International, 17 (sup 1). pp. 17-21. ISSN 1467-0100Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/39256/1/Cochlear%20Post-review%20manuscript%20for %20archiving.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk range is a score of less than 50% on the BKB sentences presented in quiet (presented at 70 30 dBSPL). 31The specific goal of this article was to review the benefit of adding the AB word test to the 32 assessment test battery for candidacy. The AB word test scores showed good sensitivity and 33 specificity when calculated based on both word and phoneme scores. The word score 34 equivalent for 50% correct on the BKB sentences was 18.5% and it was 34.5% when the 35 phoneme score was calculated; these scores are in line with those used in centres in Wales. 36The goal of the British Cochlear Implant Group (BCIG) service evaluation was to determine
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