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Vestibular evoked myogenic potentials in ipsilateral delayed endolymphatic hydrops.
Masafumi Ohki1, Masaki Matsuzaki, Keiko Sugasawa
1Department of Otolaryngology, University of Tokyo, Hongo, Japan.
ORL; Journal for Oto-Rhino-Laryngology and Its Related Specialties
|December 25, 2002
Summary
Vestibular evoked myogenic potentials (VEMPs) can detect inner ear dysfunction in delayed endolymphatic hydrops (DEH). A glycerol test using VEMPs may help confirm this condition.
Area of Science:
- Otolaryngology
- Neuroscience
- Audiology
Background:
- Delayed endolymphatic hydrops (DEH) is an inner ear disorder.
- Accurate diagnosis of DEH is crucial for effective management.
- Otolith organ function assessment is key in DEH diagnosis.
Purpose of the Study:
- To evaluate the utility of vestibular evoked myogenic potentials (VEMPs) in diagnosing ipsilateral DEH.
- To assess the impact of glycerol administration on VEMPs in DEH patients.
Main Methods:
- VEMPs were recorded in 12 patients with ipsilateral DEH.
- VEMPs were also recorded before and after glycerol administration in 4 patients.
- Comparison of VEMP responses between affected and unaffected ears was performed.
Main Results:
- Reduced or absent VEMPs were observed in 75% of affected ears in DEH patients.
- VEMPs in unaffected ears were mostly normal.
- Glycerol administration led to VEMP improvement in 2 out of 3 DEH patients with abnormal baseline VEMPs.
Conclusions:
- VEMPs are valuable for assessing otolith organ function in ipsilateral DEH.
- The VEMP-based glycerol test shows potential for confirming endolymphatic hydrops in DEH.
- These findings support VEMPs as a diagnostic tool for DEH.