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ABC Score Calculator (Assessment of Blood Consumption)
x402
ABC Score Calculator (Assessment of Blood Consumption) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Computes the Nunez 2009 ABC Score for predicting massive transfusion need based on injury mechanism, arrival SBP, arrival HR, and FAST result
Price / call$0.005
Success—
StatusUnknown
How this service works
Nunez 2009 ABC (assessment of blood consumption): penetrating mechanism, arrival SBP ≤90 mm Hg, arrival HR ≥120 bpm, and positive FAST; 1 point each, max 4. score_ge_2 is the published ≥2 cutoff (75% sensitive / 86% specific for massive transfusion in that paper). Deterministic published arithmetic with citation; not a transfusion or MTP order; not TASH; not ABC/2 ICH volume.
Output
Returns the integer ABC score from 0 to 4 (one point each for: penetrating mechanism, SBP ≤90 mm Hg, HR ≥120 bpm, positive FAST) and a boolean score_ge_2 flag indicating whether the patient meets the published ≥2 cutoff (75% sensitive, 86% specific for massive transfusion per Nunez 2009).
Example use cases
ER triage massive transfusion decision
“My trauma patient came in with a gunshot wound (penetrating), arrival BP was 85 systolic, heart rate 125, and FAST is positive — can you run the ABC score and tell me if they're at the ≥2 cutoff for massive transfusion?”
Blunt trauma with borderline vitals
“Patient arrived after a blunt motor vehicle crash, SBP 95 mm Hg, heart rate 110 bpm, FAST is negative — what's their ABC score and do they meet the massive transfusion threshold?”
Trauma registry retrospective scoring
“I need to retrospectively score a case: non-penetrating mechanism, arrival systolic BP 70, heart rate 140 bpm, positive FAST — give me the ABC score and whether it's ≥2.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/abc_scoreWhen to prefer
Use this endpoint when you need a deterministic, citeable implementation of the Nunez 2009 ABC Score specifically — not TASH, not ABC/2 ICH volume, not a general transfusion order. Ideal for trauma decision support agents, retrospective registry scoring, or any workflow where you need to apply published arithmetic with a documented sensitivity/specificity profile for massive transfusion prediction.
Side effects
- Missing required query parameters (penetrating, systolic_mm_hg, heart_rate_bpm, positive_fast) returns 400 error
- systolic_mm_hg outside 0–300 or heart_rate_bpm outside 30–220 range may be rejected as invalid
- Payment failure or missing x402 credentials returns 402
- Caller must assign penetrating mechanism and FAST interpretation — the API does not infer these from images or narrative
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/abc_score",
"count": 2,
"items": [
{
"score": 0,
"formula": "abc_score",
"citation": {
"id": "nunez-2009",
"doi": "10.1097/TA.0b013e3181961c35",
"pmid": "19204506",
"title": "Early prediction of massive transfusion in trauma: simple as ABC (assessment of blood consumption)?",
"source": "J Trauma. 2009;66(2):346-352",
"authors": "Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA"
},
"max_score": 4,
"components": [
{
"factor": "penetrating",
"points": 0,
"present": false
},
{
"value": 120,
"factor": "sbp_le_90",
"points": 0,
"present": false
},
{
"value": 80,
"factor": "hr_ge_120",
"points": 0,
"present": false
},
{
"factor": "positive_fast",
"points": 0,
"present": false
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"score_ge_2": false,
"formula_expression": "ABC = penetrating + sbp_le_90 + hr_ge_120 + positive_fast; each 1; max 4; score_ge_2 iff score >= 2"
},
{
"score": 0,
"formula": "abc_score",
"citation": {
"id": "nunez-2009",
"doi": "10.1097/TA.0b013e3181961c35",
"pmid": "19204506",
"title": "Early prediction of massive transfusion in trauma: simple as ABC (assessment of blood consumption)?",
"source": "J Trauma. 2009;66(2):346-352",
"authors": "Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA"
},
"max_score": 4,
"components": [
{
"factor": "penetrating",
"points": 0,
"present": false
},
{
"value": 120,
"factor": "sbp_le_90",
"points": 0,
"present": false
},
{
"value": 80,
"factor": "hr_ge_120",
"points": 0,
"present": false
},
{
"factor": "positive_fast",
"points": 0,
"present": false
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"score_ge_2": false,
"formula_expression": "ABC = penetrating + sbp_le_90 + hr_ge_120 + positive_fast; each 1; max 4; score_ge_2 iff score >= 2"
}
]
}
}Tags
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