Postpartum hemorrhage (PPH) is the leading cause of maternal morbidity and mortality, accounting for 27% of maternal deaths worldwide. 1 Studies have suggested that under-resuscitation and delayed intervention are the main causes of maternal death from hemorrhage. 2 Inaccurate estimation of blood loss is likely the most common reason for lack of recognition of severity of blood loss and delay in treatment. Visual estimation of blood loss (EBL) has been extensively studied and has consistently been shown to be inaccurate, regardless of provider education or seniority. 3 EBL leads to an underestimation of the amount of blood lost, [3][4][5][6] especially in volumes greater than 1000 ml. 7 Blood loss of under 1000 ml results in overestimation, when compared with measured volume. 8 Both overestimation and underestimation of blood loss can cause harm, and early detection and intervention remains a challenge in managing PPH. 9Quantification of blood loss (QBL) is an objective method used to evaluate bleeding utilizing standardized measurable weight and scale-based techniques. This method has been shown to be more accurate than visual estimation of blood loss. 10,11 Graduated vaginal delivery drapes had an error rate of less than 15% when properly
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