Pilot study on the effectiveness of the conventional CROS, the transcranial CROS and the BAHA transcranial CROS in adults with unilateral inner ear deafness |
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Authors: | Myrthe K S Hol Sylvia J W Kunst Ad F M Snik Cor W R J Cremers |
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Institution: | (1) Department of Otorhinolaryngology, Head and Neck Surgery, Radboud University Nijmegen Medical Centre, 9101, 6500 HB Nijmegen, The Netherlands |
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Abstract: | The objective of the present pilot study is to evaluate the effectiveness of three conventional contralateral routing of sound
(CROS) hearing aids in adults with unilateral inner ear deafness. The study included tertiary referral center. Ten patients
with unilateral inner ear deafness and normal hearing in the contralateral ear were selected to evaluate three different methods
of amplification: the CROS hearing aid, the completely in the canal hearing aid and the bone-anchored hearing aid CROS (BAHA).
Each of the three hearing aids was tried in a random order for a period of 8 weeks. Audiometric performance, including speech-in-noise,
directional hearing and subjective benefit were measured after each trial period, using the APHAB, SSQ and single-sided deafness
questionnaire. Sound localization performance was essentially at chance level in all four conditions. Mixed results were seen
on the other patient outcome measures that alternated in favor of one of the three CROS devices. After the trial, three patients
chose to be fitted with the BAHA CROS and one with the conventional CROS. In conclusion, most of the patients experienced
some degree of benefit with each of the three hearing aids. Preference for one of the three hearing aids was independent of
the order in which they were tried. It would be worthwhile to formulate selection criteria; still, we recommend that all patients
with unilateral inner ear deafness should be offered a trial with at least the BAHA CROS. |
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