Intraoperative monitoring of active middle ear implant function in patients with normal and pathologic middle ears.

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.

• Authors: Andreas Radeloff, Wafaa Shehata-Dieler, Kristen Rak, Agmal Scherzed, Boris Tolsdorff, Rudolf Hagen, Joachim Mueller, Robert Mlynski
• Journal: Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology (Otol Neurotol) Vol. 32 Issue 1 Pg. 104-7 (Jan 2011) ISSN: 1537-4505 [Electronic] United States
• PMID: 20962700 (Publication Type: Journal Article)

Topics

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