Abstract Details

Title Optokinetic Drum Testing: A Bedside Clinical Tool To Differentiate Migraine-Associated Vertigo and Phobic Postural Vertigo from Other Vestibular Disorders

Topic Neuro-ophthalmology/Neuro-otology

Presentation(s) P02 - (-)

Poster/Presentation
Number 258

Objective

Background BACKGROUND: At dizziness centers, MAV and PPV are common diagnoses that are primarily based on clinical history and excluding other peripheral and central vestibular causes. Presently, an objective technique to differentiate them has not been established.

Design/Methods DESIGN/METHODS: We retrospectively reviewed medical records for all new patients between May and December 2011 who were referred to the Dent Dizziness and Balance Center and also underwent bedside basic vestibular evaluation including OPK, which was recorded with Micromedical RealEyes System. When the OPK drum was spun in front of patient's eyes, patients may have experienced dizziness categorized as "Dizziness" group or no dizziness as "Normal" group. This test result, the clinical diagnoses and related co-morbidities were analyzed.

Results RESULTS: A total of 554 patient records met the study criteria. Of this population, 241 were diagnosed with MAV and/or PPV (MAV/PPV); 91 were diagnosed with MAV and/or PPV with an additional vestibular disorder (MAV/PPV+); and 222 patients were diagnosed with other vestibular disorders without any symptoms of anxiety or migraine history (Other). There were 98 (41%) "Normal" and 143 (59%) "Dizziness" responses within the MAV/PPV group; 35 (38%) "Normal" and 56 (62%) "Dizziness" responses within the MAV/PPV+ group; and 177 (80%) "Normal" and 45 (20%) "Dizziness" responses within the Other group. This data produced 59.3% sensitivity and 67.7% specificity for PPV/MAV group and 61.5% sensitivity and 59.4% specificity for PPV/MAV+ group. If we combined the MAV/PPV and MAV/PPV+ groups, the sensitivity would be 40.1% and specificity went up to 79.7%.

Conclusions CONCLUSIONS: Bedside OPK drum testing could be a screening tool for diagnosing MAV and PPV, and for identifying components of MAV and PPV in other vestibular disorders.

Authors/Disclosures
Lixin Zhang, MD, PhD (Dent Neurologic Institute) PRESENTER	Dr. Zhang has nothing to disclose.
	No disclosure on file
	No disclosure on file
	No disclosure on file
Louis A. Chiodo, PhD (AbbVie, US Medical Affairs)	No disclosure on file

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