“About a cupful” – A prospective study into accuracy of volume estimation by medical and nursing staff

McConnell, Jamie S; Fox, Thomas J.; Josson, Jyoti P.; Subramanian, Ashok

doi:10.1016/j.aaen.2007.02.006

Cited by 16 publications

(11 citation statements)

References 9 publications

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“…In the study by Dexter et al, 11 two parameters were used to determine whether a T/S was necessary-median EBL and percentage of patients transfused. EBL is known to be relatively inaccurate, 16,22 but was one of the primary determinates in their study. Our algorithm is based on a greater number of measured parameters and includes indications not just for T/S, but for T/C as well.…”

Section: Discussionmentioning

confidence: 99%

Optimizing Preoperative Blood Ordering with Data Acquired from an Anesthesia Information Management System

et al. 2013

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Section: Discussionmentioning

confidence: 99%

Optimizing Preoperative Blood Ordering with Data Acquired from an Anesthesia Information Management System

et al. 2013

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“…The quantification of blood loss remains problematic. Although recognised as unreliable, 21,22 the usual method is visual assessment following minimal training. 23 Accurate estimation is critical because volume thresholds are used to initiate treatment and resuscitation protocols.…”

Section: Introductionmentioning

confidence: 99%

Reporting errors, incidence and risk factors for postpartum haemorrhage and progression to severe PPH: a prospective observational study

Briley

Seed

Tydeman

et al. 2014

BJOG

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ObjectiveTo quantify reporting errors, measure incidence of postpartum haemorrhage (PPH) and define risk factors for PPH (≥500 ml) and progression to severe PPH (≥1500 ml).DesignProspective observational study.SettingTwo UK maternity services.PopulationWomen giving birth between 1 August 2008 and 31 July 2009 (n = 10 213).MethodsWeighted sampling with sequential adjustment by multivariate analysis.Main outcome measuresIncidence and risk factors for PPH and progression to severe PPH.ResultsErrors in transcribing blood volume were frequent (14%) with evidence of threshold preference and avoidance. The incidences of PPH ≥500, ≥1500 and ≥2500 ml were 33.7% (95% CI 31.2–36.2), 3.9% (95% CI 3.3–4.6) and 0.8% (95% CI 0.6–1.0). New independent risk factors predicting PPH ≥ 500 ml included Black African ethnicity (adjusted odds ratio [aOR] 1.77, 95% CI 1.31–2.39) and assisted conception (aOR 2.93, 95% CI 1.30–6.59). Modelling demonstrated how prepregnancy- and pregnancy-acquired factors may be mediated through intrapartum events, including caesarean section, elective (aOR 24.4, 95% CI 5.53–108.00) or emergency (aOR 40.5, 95% CI 16.30–101.00), and retained placenta (aOR 21.3, 95% CI 8.31–54.7). New risk factors were identified for progression to severe PPH, including index of multiple deprivation (education, skills and training) (aOR 1.75, 95% CI 1.11–2.74), multiparity without caesarean section (aOR 1.65, 95% CI 1.20–2.28) and administration of steroids for fetal reasons (aOR 2.00, 95% CI 1.24–3.22).ConclusionsSequential, interacting, traditional and new risk factors explain the highest rates of PPH and severe PPH reported to date.

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“…Previous studies, investigating the accuracy of the estimation of blood loss during surgery, have shown that such estimations are plagued by a high degree of inaccuracy, with a predominant underestimation [3,[20][21][22]. A potential explanation for Fig.…”

Section: Discussionmentioning

confidence: 96%

Estimate or calculate? How surgeons rate volumes and surfaces

Schuld

Kollmar

Seidel

et al. 2012

Langenbecks Arch Surg

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We found a large bias in estimating the dimension of both commonly used objects and the surface area of liver parenchyma transection. Obviously, estimating errors are more influenced by the individual subject who estimates than by the object itself. In clinical routine, surgeons should rely more on simple measuring devices than on their own sense of proportion. Education in how to estimate more correctly human liver resection surfaces can be achieved by ex vivo studies using porcine livers.

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“About a cupful” – A prospective study into accuracy of volume estimation by medical and nursing staff

Cited by 16 publications

References 9 publications

Optimizing Preoperative Blood Ordering with Data Acquired from an Anesthesia Information Management System

Optimizing Preoperative Blood Ordering with Data Acquired from an Anesthesia Information Management System

Reporting errors, incidence and risk factors for postpartum haemorrhage and progression to severe PPH: a prospective observational study

Estimate or calculate? How surgeons rate volumes and surfaces

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