Effect of a collector bag for measurement of postpartum blood loss after vaginal delivery: cluster randomised trial in 13 European countries.

Zhang, W; Deneux-Tharaux, C; Brocklehurst, P; Juszczak, E; Joslin, M; Alexander, S; EUPHRATES Group

Women's Health Collection

Journal article

Effect of a collector bag for measurement of postpartum blood loss after vaginal delivery: cluster randomised trial in 13 European countries.

Abstract:: OBJECTIVE: To evaluate the effectiveness of the systematic use of a transparent plastic collector bag to measure postpartum blood loss after vaginal delivery in reducing the incidence of severe postpartum haemorrhage. DESIGN: Cluster randomised trial. SETTING: 13 European countries. PARTICIPANTS: 78 maternity units and 25 381 women who had a vaginal delivery. INTERVENTIONS: Maternity units were randomly assigned to systematic use of a collector bag (intervention group) or to continue to visually assess postpartum blood loss after vaginal delivery (control group). MAIN OUTCOME MEASURES: The primary outcome was the incidence of severe postpartum haemorrhage in vaginal deliveries, defined as a composite of one or more of blood transfusion, intravenous plasma expansion, arterial embolisation, surgical procedure, admission to an intensive care unit, treatment with recombinant factor VII, and death. RESULTS: Severe postpartum haemorrhage occurred in 189 of 11 037 of vaginal deliveries (1.71%) in the intervention group compared with 295 of 14 344 in the control group (2.06%). The difference was not statistically significant either in individual level analysis (adjusted odds ratio 0.82, 95% confidence interval 0.26 to 2.53) or in cluster level analysis (difference in weighted mean rate adjusted for baseline rate 0.16%, 95% confidence interval -0.69% to 1.02%). CONCLUSION: Compared with visual estimation of postpartum blood loss the use of a collector bag after vaginal delivery did not reduce the rate of severe postpartum haemorrhage. TRIAL REGISTRATION: Current Controlled Trials ISRCTN66197422.

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APA Style

Zhang, W., Deneux-Tharaux, C., Brocklehurst, P., Juszczak, E., Joslin, M., Alexander, S., & Group, E. U. P. H. R. A. T. E. S. (2010). Effect of a collector bag for measurement of postpartum blood loss after vaginal delivery: cluster randomised trial in 13 European countries. BMJ, 340, c293.

MLA Style

Zhang, W, et al. “Effect of a Collector Bag for Measurement of Postpartum Blood Loss after Vaginal Delivery: Cluster Randomised Trial in 13 European Countries.” BMJ, vol. 340, 2010, p. c293.

Chicago Style

Zhang, W, C Deneux-Tharaux, P Brocklehurst, et al. 2010. “Effect of a Collector Bag for Measurement of Postpartum Blood Loss after Vaginal Delivery: Cluster Randomised Trial in 13 European Countries.” BMJ 340: c293.
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