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https://www.cochrane.org/CD010980/PREG_methods-estimating-blood-loss-after-vaginal-birth-improve-maternal-outcomes
Sep 13, 2018 · A more precise measurement of blood loss is haemoglobin concentration (Hb) in venous blood sampling and spectrophotometry. With the dye dilution technique, a known quantity of dye is injected into the vein and its plasmatic concentration is monitored after the uterus stops bleeding.
https://www.clinicaltrials.gov/ct2/show/NCT00462839
Apr 19, 2007 · Post-partum hemorrhage (PPH) is defined as blood loss greater than 500 mL after vaginal delivery. Delayed diagnosis of PPH is a major cause of maternal morbidity and mortality. Obstetricians estimate blood loss at delivery by visual estimation of blood collected in the obstetric drapes. Blood is often mixed with urine and surgical sponges.
https://www.bmj.com/content/340/bmj.c555
Feb 01, 2010 · In the linked cluster randomised controlled trial (doi: 10.1136/bmj.c293 ), Zhang and colleagues assessed whether using a transparent plastic collector bag to measure postpartum blood loss after vaginal delivery reduced the incidence of severe postpartum haemorrhage.Author: Ndola Prata, Caitlin Gerdts
https://www.jognn.org/article/S0884-2175(15)31184-9/fulltext
The key informants reported that there has been a change in how blood loss is being measured at these hospitals. Prior to 2008, 100% of the hospitals were only using visual estimation of blood loss for every birth. After 2008, blood loss measurement shifted to 51.5% using visual estimation and 48.5% using blood collection devices and weighing.Author: Kristi T. Gabel, Tracy A. Weeber
https://www.scdhhs.gov/internet/pdf/Implementing-Quantification-of-Blood-Loss.pdf
recommendation is to measure cumulative blood loss. • Discuss implementations tips for quantifying of blood loss.
http://www.hasc.org/sites/main/files/julie_vasher_qbl_why_and_how_hasc_aug_2015link.pdf
Vaginal Birth – two step process Part I • QBL immediately after delivery. Provider finishes at the perineum –Look in the drape pouch –Recommend to evaluate fluid in the pouch at delivery of placenta –most blood loss occurs after delivery of placenta Part …File Size: 2MB
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4971452/
Immediate postpartum haemorrhage (PPH) is defined as blood loss ≥ 500 mL after normal vaginal delivery.(1-3) This obstetric complication is a leading cause of maternal death worldwide. To prevent the occurrence of PPH, current evidence supports active management of the third stage of labour, especially the prescription of oxytocin, as standard obstetric care.(1-3) However, the optimal method …Author: Tripop Lertbunnaphong, Numporn Lapthanapat, Jarunee Leetheeragul, Pussara Hakularb, Amporn Ownon
http://www.pphproject.org/downloads/awhonn_qbl.pdf
of the fluid collected after the birth of the placenta is blood. 5. Add the fluid volume collected in the drapes and canister to the blood volume measured by weighing soaked items to determine the cumulative volume of blood loss or QBL. 6. Weigh all blood-soaked materials and clots to determine cumulative volume. 1 gram weight = 1 milliliter blood loss volumeFile Size: 72KB
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