Document Detail

Visually estimated and calculated blood loss in vaginal and cesarean delivery.
MedLine Citation:
PMID:  18639209     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The objective of the study was to compare visually estimated blood loss (vEBL) with calculated estimated blood loss (cEBL) according to mode of delivery and degree of perineal laceration. STUDY DESIGN: Pre- and postdelivery hematocrit (HCT) and other variables including vEBL were prospectively recorded into an obstetrical database between January and September 2005. The cEBL was derived by multiplying the calculated pregnancy blood volume (0.75 x {[maternal height (inches) x 50] + [maternal weight in pounds x 25]}) by percent of blood volume lost ({predelivery HCT - postdelivery HCT}/predelivery HCT). cEBL and vEBL were compared according to mode of delivery and degree of perineal laceration. RESULTS: There were 677 subjects with complete data. vEBL was statistically different from cEBL between each degree of laceration and between all modes of delivery, demonstrating an underestimation of vEBL with increasing cEBL. CONCLUSION: Improved methods for calculating blood loss include the use of a modified version of the formula used for pregnancy blood volume calculation.
Irene Stafford; Gary A Dildy; Steven L Clark; Michael A Belfort
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Publication Detail:
Type:  Journal Article     Date:  2008-07-17
Journal Detail:
Title:  American journal of obstetrics and gynecology     Volume:  199     ISSN:  1097-6868     ISO Abbreviation:  Am. J. Obstet. Gynecol.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-05     Completed Date:  2008-11-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370476     Medline TA:  Am J Obstet Gynecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  519.e1-7     Citation Subset:  AIM; IM    
Department of Obstetrics and Gynecology, Louisiana State University Health Sciences Center, New Orleans, LA 75390-9032, USA.
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MeSH Terms
Blood Volume*
Cesarean Section*
Delivery, Obstetric / methods*
Perineum / injuries
Postpartum Hemorrhage / diagnosis
Prospective Studies
Uterine Hemorrhage / diagnosis*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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