ABC Score (Massive Transfusion) — free guideline decision tool
Predict massive transfusion need in trauma with the ABC score.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
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.
Common 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. Award 1 point each for penetrating mechanism, SBP ≤90 mmHg, HR ≥120 bpm, and positive FAST; sum 0–4 at the trauma bay.
When is ABC Score (Massive Transfusion) used?
Trigger early massive transfusion protocol activation.
How should ABC Score (Massive Transfusion) results be interpreted?
A score ≥2 predicts need for massive transfusion and should prompt early MTP activation alongside haemorrhage-control priorities. Specific treatment and doses follow current guidelines and local protocols; this page does not list them. [Pending update] Unsourced specific doses/regimens on this page are temporarily hidden pending item-by-item review against the cited guideline texts.
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)?
Intentionally sensitive — false positives occur; still prepare blood early when positive. Does not replace ongoing reassessment with lactate, base deficit, or viscoelastic assays. Negative ABC does not exclude later transfusion need after ongoing bleeding. 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.
Does ABC Score (Massive Transfusion) upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
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.）
Run ABC Score (Massive Transfusion) now
Predict massive transfusion need in trauma with the ABC score.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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