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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Abstract

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.

Author-supplied keywords

  • *Ossicular Prosthesis
  • Action Potentials/*physiology
  • Adult
  • Aged
  • Cochlear Nerve/*physiopathology
  • Ear, Middle/*physiopathology
  • Electric Stimulation
  • Electrophysiology
  • Female
  • Hearing Loss, Mixed Conductive-Sensorineural/*phys
  • Hearing Loss, Sensorineural/*physiopathology
  • Humans
  • Male
  • Middle Aged

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Authors

  • A Radeloff

  • W Shehata-Dieler

  • K Rak

  • A Scherzed

  • B Tolsdorff

  • R Hagen

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