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American Journal of Audiology Vol.1 66-72 November 1992.
© American Speech-Language-Hearing Association
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Use of TEOAE, ABR, and Acoustic Reflex Measures to Assess Auditory Function Patients With Acoustic Neuroma

Martin S. Robinette 1, Christopher D. Bauch 1, Wayne O. Olsen 1, Stephen G. Harner 1, and Charles W. Beatty 1

1 Mayo Clinic, Rochester, MN

Cochlear and neural auditory function for a series of 30 patients with acoustic neuroma was assessed pre- and postoperatively by transiently evoked otoacoustic emission (TEOAE), auditory brain stem response (ABR), and acoustic reflex measures. Employing a retrosigmoid surgical approach, physical integrity of the acoustic nerve was preserved for 22 patients. TEOAEs were observed preoperatively for 13 patients and postoperatively for 6 of them. Postoperative neural function remained unchanged or improved following surgery for 7 patients, and cochlear function decreased. TEOAE, ABR, and acoustic reflex measurements were considered valuable in providing information about site of lesion and probable mechanisms of injury associated with tumor removal.

Key Words: emissions, acoustic neuromas, acoustic reflex, ABR

Submitted on March 3, 1992
Accepted on May 1, 1992






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