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This calculator may be used estimate blood loss during delivery.
Enter patient's height and weight. Enter patient's hematocrit before (predelivery
hematocrit) and hematocrit after (postdelivery hematocrit , then press
'Calculate'.
Formulas:
- Calculated pregnancy blood volume = (0.75
([maternal height (inches) X 50]+ [maternal weight in pounds
X
25])
- Percent of blood volume lost = (Predelivery HCT- postdelivery
HCT) / predelivery HCT.
- Calculated estimated blood loss (cEBL) = Calculated pregnancy
blood volume X Percent of blood volume lost
References
1. Stafford I, Dildy GA, Clark SL, Belfort MA. Visually estimated and calculated
blood loss in vaginal and cesarean delivery. Am J Obstet Gynecol
2008;199(5):519.e1–519.e7 PMID: 18639209
2. Gutierrez G, Reines HD, Wulf-Gutierrez ME.Clinical review: hemorrhagic shock.
Crit Care. 2004 Oct;8(5):373-81. Epub 2004 Apr 2.PMID: 15469601
3. Martel MJ,et. al., Clinical Practice Obstetrics Committee and Executive and
Council, Society of Obstetricians and Gynaecologists of Canada. Hemorrhagic
shock.J Obstet Gynaecol Can. 2002 Jun;24(6):504-20; quiz 521-4.PMID: 12196857
4. Lyndon A, Lagrew D, Shields L, Main E, Cape V. Improving Health Care Response
to Obstetric Hemorrhage. (California Maternal Quality Care Collaborative Toolkit
to Transform Maternity Care)
Developed under contract #11-10006 with the California Department of Public
Health; Maternal, Child and Adolescent Health Division; Published by the
California Maternal Quality Care Collaborative, 3/17/15
https://www.cmqcc.org/resources/2951
All calculations must be confirmed before use. The suggested results are not a substitute for clinical
judgment. Neither Perinatology.com nor any other party involved in the
preparation or publication of this site shall be liable for any special,
consequential, or exemplary
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