Association between hypotension and serious illness in the emergency department: an observational study

Abstract

Background The value of routine blood pressure measurement in the emergency department (ED) is unclear. Objective To determine the association between hypotension in addition to tachycardia and the Shock Index for serious illness. Design Observational study. Setting University ED (2009–2016). Participants, methods and main outcomes Routine data collected from consecutive children <16 years. Using logistic regression, we assessed the association between hypotension (adjusted for tachycardia) and Shock Index (ratio heart rate/blood pressure [BP]) for serious illness. The predictive accuracy (sensitivity, specificity) for hypotension and Shock Index was determined for serious illness, defined as intensive care unit (ICU) and hospital admissions. Results We included 10 698 children with measured BP. According to three age-adjusted clinical cut-offs (Advanced Paediatric Life Support, Paediatric Advanced Life Support and Paediatric Early Warning Score), hypotension was significantly associated with ICU admission when adjusted for tachycardia (range OR 2.6–5.3). Hypotension showed low sensitivity (rang