Intraoperative Monitoring of Active Middle Ear Implant Function in Patients With Normal and Pathologic Middle Ears.

  • Radeloff A
  • Shehata-Dieler W
  • Rak K
 et al. 
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OBJECTIVE:: To describe a technique enabling the intraoperative assessment of the mechanical coupling of active middle ear implants in patients with normal or dysfunctional middle ears. PATIENTS:: Patients with sensorineural or mixed hearing loss subjected to revision surgery of an active middle ear implant. INTERVENTION:: Recording of compound action potentials (CAPs) of the auditory nerve in response to stimulation via an active middle ear implant during revision surgery. MAIN OUTCOME MEASURES:: CAP thresholds as a measure of mechanical coupling and system integrity. CONCLUSION:: Determining CAP thresholds may be suitable for identifying a proper mechanical coupling of active middle ear implants in patients with a dysfunctional middle ear, even if the ossicular chain is disrupted.

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  • Andreas Radeloff

  • Wafaa Shehata-Dieler

  • Kristen Rak

  • Agmal Scherzed

  • Boris Tolsdorff

  • Rudolf Hagen

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