Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Comparative Study
. 2007 Dec;105(6):1736-40, table of contents.
doi: 10.1213/01.ane.0000286233.48111.d8.

The accuracy of blood loss estimation after simulated vaginal delivery

Paloma Toledo  1 , Robert J McCarthy, Bradley J Hewlett, Paul C Fitzgerald, Cynthia A Wong
Affiliations
Comparative Study

The accuracy of blood loss estimation after simulated vaginal delivery

Paloma Toledo et al. Anesth Analg. 2007 Dec.

Abstract

Background: Visual blood loss estimation often underestimates blood loss. In this study we sought to determine the effect of calibrated drape markings on blood loss estimation in a simulated vaginal delivery.

Methods: Subjects were randomized to estimate simulated blood loss (300, 500, 1000, and 2000 mL) in calibrated or noncalibrated vaginal delivery drapes and then crossover.

Results: Visual blood loss estimation with noncalibrated drapes underestimated blood loss, with worsening accuracy at larger volumes (16% error at 300 mL to 41% at 2000 mL). The calibrated drape error was <15% at all volumes.

Conclusions: Calibrated vaginal delivery drapes improve blood loss estimation.

PubMed Disclaimer

Publication types