Blood lactate concentration and shock index associated with massive transfusion in emergency department patients with primary postpartum haemorrhage

摘要

Background: We hypothesised that lactate concentrations are independently associated with massive transfusion in patients with primary postpartum haemorrhage. Moreover, combining lactate concentrations with the shock index, defined as the ratio of heart rate to systolic arterial blood pressure, can improve the predictive performance for massive transfusion.