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Brainstem auditory evoked potential monitoring: when is change in wave V significant?

Publication ,  Journal Article
James, ML; Husain, AM
Published in: Neurology
November 22, 2005

BACKGROUND: The probability of hearing loss during cerebellopontine angle (CPA) surgery can be reduced by using brainstem auditory evoked potential (BAEP) intraoperative monitoring (IOM). A wave V latency prolongation of 1.0 milliseconds or amplitude decrement of greater than 50% is arbitrarily considered the point when damage to hearing occurs. OBJECTIVE: To determine the accuracy of wave V changes in predicting hearing impairment. METHODS: Patients undergoing BAEP IOM for surgery in the CPA region were evaluated. The greatest wave V latency and amplitude change was determined. Patients were divided into four groups depending on degree of change of wave V: Group 1 consisted of minimal change, whereas Group 4 was permanent loss of wave V. The frequency of hearing loss in each group was compared. RESULTS: Data from 156 patients were reviewed. When all patients were analyzed, the frequency of hearing loss was not significantly different between the groups. When patients with CPA tumor were excluded, a significantly higher number of patients in Group 4 had hearing loss. Analysis of the patients with CPA tumor showed no difference in the frequency of hearing loss in any of the groups; even a large number (50%) of Group 1 patients had hearing impairment. CONCLUSIONS: During brainstem auditory evoked potential intraoperative monitoring, the type of surgery is important when interpreting significance of changes of wave V. For non-cerebellopontine angle tumor surgery, hearing loss occurs usually only with permanent loss of wave V; much smaller changes may be important in cerebellopontine angle tumor surgery.

Duke Scholars

Published In

Neurology

DOI

EISSN

1526-632X

Publication Date

November 22, 2005

Volume

65

Issue

10

Start / End Page

1551 / 1555

Location

United States

Related Subject Headings

  • Retrospective Studies
  • Reaction Time
  • Predictive Value of Tests
  • Postoperative Complications
  • Neurosurgical Procedures
  • Neurology & Neurosurgery
  • Neural Conduction
  • Monitoring, Intraoperative
  • Male
  • Iatrogenic Disease
 

Citation

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James, M. L., & Husain, A. M. (2005). Brainstem auditory evoked potential monitoring: when is change in wave V significant? Neurology, 65(10), 1551–1555. https://doi.org/10.1212/01.wnl.0000184481.75412.2b
James, Michael L., and Aatif M. Husain. “Brainstem auditory evoked potential monitoring: when is change in wave V significant?Neurology 65, no. 10 (November 22, 2005): 1551–55. https://doi.org/10.1212/01.wnl.0000184481.75412.2b.
James ML, Husain AM. Brainstem auditory evoked potential monitoring: when is change in wave V significant? Neurology. 2005 Nov 22;65(10):1551–5.
James, Michael L., and Aatif M. Husain. “Brainstem auditory evoked potential monitoring: when is change in wave V significant?Neurology, vol. 65, no. 10, Nov. 2005, pp. 1551–55. Pubmed, doi:10.1212/01.wnl.0000184481.75412.2b.
James ML, Husain AM. Brainstem auditory evoked potential monitoring: when is change in wave V significant? Neurology. 2005 Nov 22;65(10):1551–1555.

Published In

Neurology

DOI

EISSN

1526-632X

Publication Date

November 22, 2005

Volume

65

Issue

10

Start / End Page

1551 / 1555

Location

United States

Related Subject Headings

  • Retrospective Studies
  • Reaction Time
  • Predictive Value of Tests
  • Postoperative Complications
  • Neurosurgical Procedures
  • Neurology & Neurosurgery
  • Neural Conduction
  • Monitoring, Intraoperative
  • Male
  • Iatrogenic Disease