ABC Score (Massive Transfusion)
Assessment of Blood Consumption (ABC) score — a 0-4 count over penetrating mechanism of injury, systolic BP <= 90 mmHg on ED arrival, heart rate >= 120 bpm on ED arrival, and a positive FAST examination.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Penetrating mechanism of injury
- Yes
- Systolic BP <= 90 mmHg on ED arrival
- Yes
Result: ABC 2 of 4 — predicts massive transfusion (>= 2).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- < 2
- Does not predict massive transfusion.
- >= 2
- Predicts massive transfusion (~75% sensitivity / ~86% specificity in the derivation cohort). A trigger category, not a transfusion order.
What you enter
- Penetrating mechanism of injury
- Systolic BP <= 90 mmHg on ED arrival
- Heart rate >= 120 bpm on ED arrival
- Positive FAST examination
How this is calculated
Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA. Early prediction of massive transfusion in trauma: simple as ABC (assessment of blood consumption)? J Trauma. 2009;66(2):346-352. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.