🩸 ABC Score (Massive Transfusion)
Predict massive transfusion need in trauma with the ABC score.
Clinical takeaway
Uses only bedside data — no laboratory values.
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When to use
Trigger early massive transfusion protocol activation.
How it works
Penetrating mechanism, SBP ≤ 90, HR ≥ 120, positive FAST — each 1 point. ≥ 2 predicts massive transfusion.
Key points
- Uses only bedside data — no laboratory values.
- Intentionally simple and sensitive.
- ≥ 2 should prompt MTP activation.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Penetrating mechanism | No |
|---|---|
| Systolic BP ≤ 90 mmHg | No |
| Heart rate ≥ 120 bpm | No |
| Positive FAST | No |
→ABC score0/4
- Interpretation：< 2 — massive transfusion less likely
- Action：Continue standard resuscitation and reassess.
| Penetrating mechanism | Yes (+1) |
|---|---|
| Systolic BP ≤ 90 mmHg | Yes (+1) |
| Heart rate ≥ 120 bpm | Yes (+1) |
| Positive FAST | Yes (+1) |
→ABC score4/4
- Interpretation：≥ 2 — predicts need for massive transfusion
- Action：Activate the massive transfusion protocol early.
Frequently asked questions
- What is ABC Score (Massive Transfusion)?
- Predict massive transfusion need in trauma with the ABC score.
- How is ABC Score (Massive Transfusion) calculated? What is the core formula?
- Penetrating mechanism, SBP ≤ 90, HR ≥ 120, positive FAST — each 1 point. ≥ 2 predicts massive transfusion.
- When is ABC Score (Massive Transfusion) used?
- Trigger early massive transfusion protocol activation.
- What are the key clinical points for ABC Score (Massive Transfusion)?
- Uses only bedside data — no laboratory values. Intentionally simple and sensitive. ≥ 2 should prompt MTP activation.
- What are the limits and cautions when using ABC Score (Massive Transfusion)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is ABC Score (Massive Transfusion) calculated in practice? Can you show a worked example?
- Inputs: Penetrating mechanism No, Systolic BP ≤ 90 mmHg No, Heart rate ≥ 120 bpm No, Positive FAST No → Result: ABC score 0 /4（Interpretation: < 2 — massive transfusion less likely, Action: Continue standard resuscitation and reassess.） Inputs: Penetrating mechanism Yes (+1), Systolic BP ≤ 90 mmHg Yes (+1), Heart rate ≥ 120 bpm Yes (+1), Positive FAST Yes (+1) → Result: ABC score 4 /4（Interpretation: ≥ 2 — predicts need for massive transfusion, Action: Activate the massive transfusion protocol early.）