The Accuracy of Manual BPPV Diagnostics When Using VNG Goggles.

The Accuracy of Manual BPPV Diagnostics: A Randomized Crossover Study With Comparison of Manual Diagnostic and Diagnostic in TRV Chair, When Using VNG Goggles in Both Scenarios.

The aim is to investigate the accuracy of manual diagnostics of benign paroxysmal positional vertigo (BPPV) by comparing it to BPPV diagnostics in mechanical rotational chair (TRV chair). VNG (videonystagmography) goggles will be used in both scenarios.

Furthermore, the investigators will examine the importance of angulation and velocity in relation to the diagnostic outcome.

Open-label, randomized controlled trial with cross over comparing manual bedside BPPV diagnostics with diagnostics in a mechanical rotational chair (TRV chair) when using VNG goggles in both scenarios.

Patients with a history of positional vertigo will be considered for enrollment and randomized to which diagnostic modality they begin with. Each subject will wait for minimum 30 minutes between the two diagnostics.

Inclusion Criteria:

• Age above 18 years
• Classic BPPV-patient history (short lasting (<1 minute) positional rotatory vertigo, no accompanying tinnitus or hearing loss, and no focal neurological findings.
• Understand written and spoken Danish

Exclusion Criteria:

• Pregnancy
• Weight ≥ 150 kg and or Height ≥ 2m
• Neck and spine immobility to a degree where MD on examination bed is impossible
• Insufficient cooperation during diagnostic testing
• Sedative antihistamines taken within the past seven days
• Comorbidities: Heart failure (EF < 40), known cerebral aneurysm, cerebrovascular events (<3 months) or dissection disease
• Spontaneous or gaze evoked nystagmus