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1: Arch Otolaryngol Head Neck Surg. 1991 Oct;117(10):1153-7.Click here to read Links

Auditory monitoring during acoustic neuroma removal.

Slavit DH, Harner SG, Harper CM Jr, Beatty CW.

Department of Otorhinolaryngology, Mayo Clinic, Rochester, Minn.

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.

PMID: 1910703 [PubMed - indexed for MEDLINE]