Zur Indikationserweiterung des „cochlear-implant”

Abstract

The usual indication for a cochlear implant (CI) is acquired deafness in patients for whom conventional hearing aids are of no benefit. The question is whether CI is superior to the best conventional hearing aids for patients with some residual hearing, but who achieve only minimal speech recognition (< 30% in the Freiburg monosyllable word test at 70 dB (I) SPL) with optimal hearing aids. We report our experience with five patients with residual hearing who underwent cochlear implantation (Nucleus Mini 22 and 24) on the worse side. The patients were examined preoperatively and at 1, 6 and 12 months following activation of the implant. The Freiburg monosyllabic word test, the Göttingen sentence test and consonant recognition were used to assess postoperative results. All patients benefitted from CI when test scores were compared with preoperative ones. All patients achieved a score in the Freiburg monosyllabic word test of more than 60% at 70 dB (I) SPL 12 months post switch-on. Four patients achieved a score of more than 85% in the Göttingen sentence test. These results and the progress made in cochlear implant technology are an impetus to continue discussions of various considerations of criteria for cochlear implants and possibly extend these for patients with severe hearing impairment.

Speech Intelligibility and Subjective Evaluation of Music Playback of Sound Transducers with Glass and Wooden Membrane

“…Several standardized tests exist for subjective measurement for German language, for example the Freiburger test uses 20 one-syllable words and 10 lists containing 10 numbers [11,12]; the Marburger test for children [13,14]; the Göttinger test with meaningful sentences created from 5 words [15,16] or the Oldenburger test with meaningless sentences [16][17][18]. Based on different considerations and limitations of the measurement system and procedure the so called Modified Rhyme Test (MRT) was selected for the subjective evaluation [19,20].…”

The History of Cochlear Implantation: From Volta to Multichannel-Intracochlear Stimulation

“…Die Indikationsstellung zum CI bei Resthörigkeit rückte in den letzten Jahren immer mehr in den Blickpunkt, denn mit dem Implantat konnte ein besseres Sprachverstehen (Freiburger Einsilber, Göttinger Sätze, Konsonanten) erzielt werden als unter optimaler Hörgeräteanpassung [64].…”

Cochlear Implant bei Kindern

“…Prinzipiell sind alle Cochlear-Implant-Systeme technisch ähnlich aufgebaut [3]. Sie unterscheiden sich lediglich in den verwendeten biokompatiblen Materialien, der Form der Implantatkörper, der Anzahl und Form der Stimulationselektroden sowie der Möglichkeit der Verwendung verschiedener elektronischer Sprachverarbeitungsstrategien.…”