ABC Score Calculator for Massive Transfusion
Assessment of Blood Consumption score for adult trauma patients.
Clinical use note: This calculator is an educational aid only. It does not replace clinical judgment or your local trauma / massive transfusion protocol. In unstable trauma patients, do not delay resuscitation or MTP activation while completing a score.
Scoring
- Penetrating mechanism of injury: 1 point
- Positive FAST: 1 point
- Systolic BP < 90 mmHg: 1 point
- Heart rate > 120 beats/min: 1 point
Total score: 0–4 points.
Common interpretation: ABC score ≥2 suggests higher likelihood of requiring massive transfusion / MTP activation, depending on institutional policy and clinical context.
Some references use SBP ≤90 mmHg and HR ≥120 bpm wording. Follow your institution’s preferred cutoff definitions.
References
- Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA. Early prediction of massive transfusion in trauma: simple as ABC. Journal of Trauma. 2009;66(2):346-352.
- American College of Surgeons Trauma Quality Improvement Program. Massive Transfusion in Trauma Guidelines. Released October 2014.
- MDCalc. ABC Score for Massive Transfusion. Calculator summary and clinical notes.
