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September 10, 2025Scientific ReportsOpen Access

The MAR method versus the visual estimation method in predicting external blood loss: a randomized controlled study

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Randomized controlled study assessed blood loss estimation accuracy in medical students, suggesting MAR method advantages.

MAR method improved blood loss estimation accuracy, reducing errors compared to the visual estimation method.
In this study, 140 medical and paramedic students estimated blood loss using either the MAR or visual estimation method.
The analysis utilized various models in R to evaluate differences in accuracy and time taken between the two methods.
Incorporating the MAR method into training could enhance skills for managing external bleeding effectively.

Özel et al. (2025) studied this question.

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