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

ABSTRACT: Accurately estimating blood loss is critical for managing hemorrhagic shock in prehospital and hospital settings. The Visual Estimation (VE) method is widely used, while the MAR method proposes using a fist measurement to estimate external blood on flat surfaces. A randomized, double-blind, parallel-group, controlled, and educational study was conducted involving 140 medical and paramedic students. The study compared the accuracy and duration of blood loss estimates made with the MAR and VE methods. The secondary objective was to assess whether MAR estimates varied by participants' height, weight, or gender. Three simulated stations featured three different, non-absorbent, flat surfaces containing 75 mL, 150 mL, or 750 mL of blood. Participants were divided into two groups (Group 1: VE met

SUBMITTER: Akbuga Ozel B 

PROVIDER: S-EPMC12375695 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature