• Emerg Med J · Oct 2016

    Valsalva using a syringe: pressure and variation.

    • Hilary Sarah Thornton, Mohammed H Elwan, Joseph A Reynolds, and Timothy J Coats.
    • Emergency Medicine Academic Group, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.
    • Emerg Med J. 2016 Oct 1; 33 (10): 748-9.

    BackgroundThe Valsalva manoeuvre is commonly used in EDs to terminate supraventricular tachycardia by the patient blowing into a syringe.AimTo identify whether a specific syringe size can be recommended for use in the ED.Results20% of syringes 'stuck' and required high pressures to move. In the remaining 80% of syringes, a 20 mL syringe was the most appropriate size to achieve the recommended 40 mm Hg. Once 'released' plunger position did not make a difference.ConclusionsUse of a syringe of any size cannot be recommended if a consistent pressure is required.Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

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