Performance of prelingually and postlingually deaf patients using single‐channel or multichanel cochlear implants

Abstract

The auditory and aided lipreading performance of 8 prelingually and 11 postlingually deaf patients who had received a single-channel or multichannel cochlear implant was evaluated during 2 years of follow-up. Although all the patients improved on both closed-set pattern recognition and speech discrimination tests and on a Continuous Discourse Tracking task, the most significant improvement was observed in the postlingually deaf patients who were using a multichannel implant. These patients were the only ones to achieve open-set speech recognition in the auditory-only condition. Only small differences were found between prelingually deaf patients who were using a single-channel system and those who were using a multichannel system. The users' evaluations, obtained by means of a questionnaire, were generally positive in all patients. Based on the study results, the authors concluded that it is feasible to use cochlear implants in highly motivated prelingually deaf patients who have learned to use oral-aural communication.

The Relation between Electric Auditory Brain Stem and Cognitive Responses and Speech Perception in Cochlear Implant Users

“…Averaging occurs after corexpressed in mA and the slope in /¿V/mA. rection for different chance levels (17). The composite If the output was saturated, the DR was deterscores (CS) in our group of patients varied from 67 mined by fitting two lines through the I/O data to 90%, see Table L Based on these scores, the points, as indicated in Fig.…”

“…The procedure and the tests were described by Plin the EABR threshold and the subjective threshold (TD; derink et al (17). Speech recognition at this evaluathreshold difference in CLS); ii) the dynamic range tion moment is used as reference.…”

Relationship Between Age of Hearing-Loss Onset, Hearing-Loss Duration, and Speech Recognition in Individuals with Severe-to-Profound High-Frequency Hearing Loss

“…Studies of cochlear-implant (CI) subjects indicate that, for these subjects, whether hearing-loss occurred before or after the acquisition of language, and how long the duration of deafness was prior to implantation, are two of the most significant predictors of speechrecognition performance (Tong et al 1988;Busby et al 1992Busby et al , 1993Dawson et al 1992;Gantz et al 1993;Hinderink et al 1995;Kessler et al 1995;Shipp and Nedzelski 1995;Blamey et al 1996;Okazawa et al 1996;Rubinstein et al 1999;Van Dijk et al 1999;Friedland et al 2003;Leung et al 2005;Green et al 2007;Gantz et al 2009). In general, the results show that individuals in whom hearing-loss occurred postlingually achieve statistically higher speech-recognition scores than individuals who became deaf prior to the acquisition of language (Tong et al 1988;Busby et al 1993;Hinderink et al 1995;Okazawa et al 1996), and that the duration of deafness correlates negatively with speech-recognition performance (Gantz et al 1993;Blamey et al 1996;Rubinstein et al 1999;Gantz et al 2009).…”

“…In general, the results show that individuals in whom hearing-loss occurred postlingually achieve statistically higher speech-recognition scores than individuals who became deaf prior to the acquisition of language (Tong et al 1988;Busby et al 1993;Hinderink et al 1995;Okazawa et al 1996), and that the duration of deafness correlates negatively with speech-recognition performance (Gantz et al 1993;Blamey et al 1996;Rubinstein et al 1999;Gantz et al 2009). These findings have been variously explained in terms of neural plasticity and detrimental effects of sensory deprivation versus beneficial effects of sensory stimulation on auditory pathways involved in speech recognition, and in terms of perceptual learning of speech cues.…”

Cochlear implantation: a review of the literature and the Nijmegen results

“…The Nijmegen Cl team evaluated the speech performance of prelingually and postlingually deaf adults who had received either a single-channel or a multi-channel C l (Hinderink et aL, 1995). Speech perception tests were performed at various intervals during a two-year follow-up period.…”