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Related Experiment Videos

Screening for retrocochlear pathology.

I W Mair1, S Okstad, E Laukli

  • 1Department of Otorhinolaryngology, University of Tromsø, Norway.

Scandinavian Audiology
|January 1, 1988
PubMed
Summary
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Brainstem response audiometry (BRA) is the most effective screening tool for retrocochlear pathology. While other tests showed low accuracy, BRA identified potential cases, with enhanced CT confirming tumors in some patients.

Area of Science:

  • Audiology
  • Neurology
  • Medical Diagnostics

Background:

  • Retrocochlear pathology requires accurate diagnostic methods.
  • Traditional audiological tests may lack sufficient prognostic accuracy for these conditions.

Purpose of the Study:

  • To evaluate the effectiveness of a diagnostic protocol for retrocochlear pathology.
  • To determine the best single screening test for identifying retrocochlear pathology.

Main Methods:

  • Screening of 135 patients using caloric testing, impedance audiometry, and brainstem response audiometry (BRA).
  • Comparison of the prognostic accuracy of different test combinations.
  • Utilizing enhanced computer tomography (CT) for further investigation of positive BRA results.

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Main Results:

  • Combined caloric testing and impedance audiometry demonstrated unacceptably low prognostic accuracy.
  • BRA indicated potential retrocochlear pathology in 8 patients and was inconclusive in 4.
  • Enhanced CT confirmed intracranial tumors in 4 of the 8 patients identified by BRA; no lesions were found in others.

Conclusions:

  • Brainstem response audiometry (BRA) is the most effective single screening test for retrocochlear pathology.
  • The diagnostic protocol highlights the superior utility of BRA over combined traditional tests.