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Hypertensive Crisis During Norepinephrine Syringe Exchange: A Case Report
Roland A Snijder1, Johannes T A Knape, Toine C G Egberts
1From the *Department of Medical Technology and Clinical Physics; †Department of Anaesthesiology, Intensive Care and Emergency Medicine; ‡Department of Clinical Pharmacy, University Medical Center Utrecht, Utrecht, the Netherlands; and §Division of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, the Netherlands.
Abstract:
A 67-year critically ill patient suffered from a hypertensive crisis (200 mm Hg) because of a norepinephrine overdose. The overdose occurred when the clinician exchanged an almost-empty syringe and the syringe pump repeatedly reported an error. We hypothesized that an object between the plunger and the syringe driver may have caused the exertion of too much force on the syringe. Testing this hypothesis in vitro showed significant peak dosing errors (up to +572%) but moderate overdose (0.07 mL, +225%) if a clamp was used on the intravenous infusion line and a large overdose (0.8 mL, +2700%) if no clamp was used. Clamping and awareness are advised.
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