Vagus nerve block as a diagnostic tool for VANCOUVER syndrome
Authors' conclusion
Vagus nerve block can confirm the diagnosis and lateralize the affected nerve in patients with VANCOUVER syndrome who cannot lateralize their symptoms.
Study context
- Population
- Patients potentially having VANCOUVER syndrome who could not lateralize their sensory symptomseach had both sides blocked
- Participants
- 2 participants
- Exposure
- Ipsilateral vs Contralateral
- Outcome
- Cough
Methodological detailsretrospective medical record review, ultrasound-guided, outpatient procedure, Percutaneous cervical vagus nerve block in the supine position, ultrasound-guided, in-plane needle technique; unilateral block, then contralateral block several weeks later
- Retrospective medical record review
- Ultrasound-guided
- Outpatient procedure
- Percutaneous cervical vagus nerve block in the supine position, ultrasound-guided, in-plane needle technique; unilateral block, then contralateral block several weeks later
Main finding
As reported in the abstract
- Both patients had temporary resolution of cough after ipsilateral block, no effect after contralateral block
Observational data: associations, not effects.
Safety
Effects during vagus nerve block
- Temporary vocal hoarseness and ipsilateral Horner syndrome; no hemodynamic disturbances
Original publication
Vagus nerve block as a diagnostic tool for VANCOUVER syndrome. Reg Anesth Pain Med. Published 3 February 2026. doi:10.
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