Untersuchung zum Einfluss der Seitenwahl auf das postoperative Ergebnis bei der unilateralen Cochlea-Implantation
Objective: To determine whether choosing the “better” ear or the “worse” ear for co-chlear implantation impacts performance outcome. Study Design: Retrospective cohort study. Firstly two groups out of 139 cochlear implantees are selected on the basis of audiological and electrophysiological tests. Secondly two groups of cochlear implantees are selected and matched based on clinical parameters. Group 1 is implanted on the better ear and group 2 on the worse ear. Setting: Cochlear implant program of the university hospital RWTH Aachen. Patients: 139 cochlear implant patients operated between 1986 and 2001 with little difference in audiological an electrophysiological tests preoperatively between both ears. Interventions: audiometry, Freiburg speech test, promontorial test, BERA and electrocochleography. Results: One year after implantation the medium increase in Freiburg polysyllabic test (FP) in group 1 (implantation of better ears) with audiological tests is 18,9% versus 27,9% in group 2 (implantation of worse ears). After grouping with electrophysiological tests it is 38,9% versus 59,4% and in matched-pair comparison it is 46,7% versus 51,4%. After one year medium increase in Freiburg monosyllabic test (FM) in group 1 with audiological grouping is 26,9% versus 30,4% in group 2. In electrophysiological grouping it is 26,3% versus 28,6% and in matched-pair comparison it is 31% versus 23,3%. Statistically there is no performance difference between implanting the better and the worse ear. Conclusions: Choosing the “worse” or the “better” ear for cochlear implantation does not appear to have an impact on speech performance outcome on patients with small functional difference between the ears preoperatively.
info:eu-repo/classification/ddc/610, Medizin, Cochlear-Implantat, Seitenwahl, unilateral, cochlear implantation
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