Calibrated delivery drape versus indirect gravimetric technique for the measurement of blood loss after delivery: a randomized trial
This study compared measures of blood loss obtained from two different measurement techniques frequently used in studies focusing on the prevention and treatment of post-partum hemorrhage (PPH). Significantly greater mean blood loss was recorded by the direct than by the indirect measurement technique, suggesting a meaningful difference in blood loss measurement between these two methods.
BMC Pregnancy Childbirth. 2014 Aug 15;14(1):276. doi: 10.1186/1471-2393-14-276.
Access the article at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4141098/.