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David H. Slavit, MD; Stephen G. Harner, MD; C. Michel Harper, Jr, MD; Charles W. Beatty, MD

Arch Otolaryngol Head Neck Surg. 1991;117(10):1153-1157.

Abstract
• Preservation of hearing has become attainable for patients with small acoustic neuromas. Brain-stem auditory evoked response was monitored intraoperatively in 60 patients undergoing acoustic neuroma surgery via the posterior fossa approach. The overall rate of hearing preservation was 30% in the monitored group and 20% in 60 patients who were matched for tumor size and preoperative hearing level and underwent the same surgical procedure but without intraoperative brain-stem auditory evoked response monitoring. The rate of hearing preservation was correlated with tumor size: with tumors less than or equal to 1 cm, hearing was preserved in 82% of monitored and 36% of unmonitored patients; hearing was not preserved with tumors larger than 3 cm. Intraoperative brain-stem auditory evoked response monitoring appears to have improved the preservation of hearing during removal of small tumors.

(Arch Otolaryngol Head Neck Surg. 1991;117:1153-1157)

Author Affiliations
From the Departments of Otorhinolaryngology (Drs Slavit, Harner, and Beatty) and Neurology (Dr Harper), Mayo Clinic and Mayo Foundation, Rochester, Minn.

Footnotes
Accepted for publication March 22, 1991.

Presented at the meeting of the American Neurootology Society, West Palm Beach, Fla, April 27-29, 1990.

Reprints not available.

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