Lautheitsoptimierte Messung von Summenaktionspotentialen bei Cochlea Implantat Trägern

Zusammenfassung

Hintergrund Die postoperative Messung von Summenaktionspotentialen ist aufgrund mangelnder Akzeptanz durch die CI-Träger nicht immer möglich. In dieser Arbeit wurde untersucht, ob durch veränderte Messparameter eine höhere Akzeptanz der Messung erreicht werden kann.

Methodik Es wurden Summenaktionspotentiale an 16 CI-Trägern bei verschiedenen Pulsbreiten gemessen. An der Potentialschwelle wurde eine Lautheitsbewertung der bei der Messung verwendeten Sequenzen durchgeführt.

Ergebnisse Die Registrierung der Summenaktionspotentiale wird bei höheren Pulsbreiten von den CI-Trägern leiser empfunden.

Schlussfolgerung Bei mit höheren Pulsbreiten gemessenen Summenaktionspotentialen findet sich ein zunehmender Abstand zwischen maximal akzeptierter Stimulusintensität und Potentialschwelle. Dieser trägt zur höheren Akzeptanz postoperativer Messungen bei.

Abstract

Background Postoperative measurements of compound action potentials are not always possible due to the insufficient acceptance of the CI-recipients. This study investigated the impact of different parameters on the acceptance of the measurements.

Methods Compound action potentials of 16 CI recipients were measured with different pulse-widths. Recipients performed a loudness rating at the potential thresholds with the different sequences.

Results Compound action potentials obtained with higher pulse-widths were rated softer than those obtained with smaller pulse-widths.

Conclusions Compound action potentials measured with higher pulse-widths generate a gap between loudest acceptable presentation level and potential threshold. This gap contributes to a higher acceptance of postoperative measurements.

Schlüsselwörter

Cochlea Implantat - Summenaktionspotential - Pulsbreite - Lautheit - Diagnostik

Key words

Cochlea implant - compound action potential - pulse-width - loudness - diagnostics

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