Objectives: To correlate the visual estimated blood loss (vEBL) with the calculated estimated blood loss (cEBL) during delivery in nulliparous women. Design: Correlation retrospective study. Setting: Hospital Nacional Cayetano Heredia, Lima, Peru. Study material: Medical records. Methods: We reviewed 225 medical records of at term nulliparous patients’ vaginal deliveries attended between July and December 2009. Main outcome measures: Correlation between visually estimated and calculated blood loss. Results: Mean vEBL and cEBL were respectively 285.70 ± 82.77 mL and 534.75 ± 367.58 mL. Hematocrit descended 3.8%. There was a significant underestimation between vEBL regarding cEBL in episiotomies (p=0.0000) and 3th and 4th degrees lacerations. The Spearman correlation coefficient for vEBL and cEBL was 0.06 (p=0.31). Conclusions: No  correlation was found between vEBL and cEBL. Visual e...

Objectives: To correlate the visual estimated blood loss (vEBL) with the calculated estimated blood loss (cEBL) during delivery in nulliparous women. Design: Correlation retrospective study. Setting: Hospital Nacional Cayetano Heredia, Lima, Peru. Study material: Medical records. Methods: We reviewed 225 medical records of at term nulliparous patients’ vaginal deliveries attended between July and December 2009. Main outcome measures: Correlation between visually estimated and calculated blood loss. Results: Mean vEBL and cEBL were respectively 285.70 ± 82.77 mL and 534.75 ± 367.58 mL. Hematocrit descended 3.8%. There was a significant underestimation between vEBL regarding cEBL in episiotomies (p=0.0000) and 3th and 4th degrees lacerations. The Spearman correlation coefficient for vEBL and cEBL was 0.06 (p=0.31). Conclusions: No  correlation was found between vEBL and cEBL. Visual e...