Speech Perception Development in Patients with Varying Durations of Deafness
Explore the impact of duration of deafness on speech comprehension in adult patients who underwent cochlear implantation after the age of 18. The study examines 1022 individuals categorized based on the length of deafness pre-implantation, with speech testing conducted over a 5-year period. Results suggest a correlation between duration of deafness and speech perception outcomes. Visit the Department of Otolaryngology at the Medical University of Hannover, Germany, for more insights.
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Development of Speech Perception in Patients with Different Durations of Deafness A. Illg, E. Kludt, A. Lesinski-Schiedat, T. Lenarz, A. B chner Medical University of Hannover Department of Otolaryngology, Hannover, Germany Chairman: Prof. Prof. h.c. Dr. med. Thomas Lenarz
Introduction and Objective Preoperative individual conditions play a big role for developing high results in speech understanding. Duration of the deafness prior to the CI implantation is supposed to be one of the most important factors for clinical outcome. Retrospective evaluation of speech comprehension in patients that became deaf in their adult life in relation to the time interval between the onset of the deafness and implantation. www.mhh-hno.de www.mhh-hno.de
Patients Data of 1022 adult patients 428 male, 594 female 390 AB, 141 MedEL, 491 Cochlear Onset of deafness after their 18thbirthday Exclusion Criteria: cognitive disabilities prelingual deafness non native speaker short electrodes electro-acustic stimulation SSD www.mhh-hno.de www.mhh-hno.de
Methode 5 years follow up Speech comprehension testing (65 dB SPL) Freiburg monosyllabic word test (FMT) German language HSM sentence test in quiet German language HSM sentence test in noise (S0N0) 10 dB (SNR) Evaluation into 5 groups depending on the duration of deafness before the implantation: Group 1: one month to one year, N=149 Group 2: one to ten years, N= 316 Group 3: ten to 20 years , N= 95 Group 4: 20 to 30 years, N= 50 Group 5: 30 to 45 years, N= 18 Jonckheere-Terpstra test, p < 0.05 www.mhh-hno.de www.mhh-hno.de
Age at Implantation vs. Duration of Deafness 1022 patients www.mhh-hno.de www.mhh-hno.de
Age at Implantation vs. Duration of Deafness 1022 patients 264 195 18 66 35 578 patients between 50 and 80 y. 375 patients between 18 and 50 y. 212 116 31 www.mhh-hno.de www.mhh-hno.de
Monosyllables p<0.05 www.mhh-hno.de www.mhh-hno.de
Sentences in quiet p<0.05 www.mhh-hno.de www.mhh-hno.de
Sentences in noise www.mhh-hno.de www.mhh-hno.de
Conclusion Speech Comprehension is possible after Cochlear Implantation also in patients with a long period (>20 y.) of deafness. Their results are not as good as in patients with shorter periods of deafness. After a wearing period of the speech processor of five years, the speech perception results are still influenced by the duration of their deafness. This seems to indicate that long periods of deafness have also in adults an influence of the central structures of the brain. Additional: In older age ganglion cells became reduced and cognitive degenerative processes are possible. www.mhh-hno.de www.mhh-hno.de
