Diphasic impedance change and its applicability in clinical work

Abstract

In 186 ears of 115 patients, impedance changes at the onset and at the end of the stimulus (“diphasic impedance changes”) were recorded, using Madsen Impedance Instruments Model ZO 61 and Model ZO 70. The eliciting stimuli were:

1. Tactile stimulus

2. Acoustic stimulus

3. Defensive—reaction or startle—evoking stimulus