Emergency · LIVE

ABC score (assessment of blood consumption)

ABC score

Sum the four Nunez 2009 ABC (assessment of blood consumption) arrival factors and return score_ge_2 at the published ≥2 cutoff.

LIVE $0.005 USDC GET /api/calc/abc_score

Markdown: /docs/abc-score.md · Canonical: https://magentlab.com/docs/abc-score

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Sum the four Nunez 2009 ABC (assessment of blood consumption) arrival factors and return score_ge_2 at the published ≥2 cutoff.

When to use

When an agent needs the published Nunez 2009 ABC point total and the ≥2 cutoff flag and must not invent an MTP activation or transfusion order.

When not to use

• Not a medical device and not a massive-transfusion protocol (MTP) or transfusion order. magent does not decide whether to activate MTP.
• ABC ≥2 was 75% sensitive and 86% specific for massive transfusion in Nunez 2009; score_ge_2 is that published classification cutoff, not an order.
• Penetrating mechanism and positive FAST are caller-assigned. magent does not interpret FAST images or assign injury mechanism.
• This is Nunez 2009 ABC only. It is not TASH, not ABC/2 ICH volume, and not a blood-product volume estimate.

Formula

ABC = penetrating + sbp_le_90 + hr_ge_120 + positive_fast; each 1; max 4; score_ge_2 iff score >= 2

Citation

Title

Early prediction of massive transfusion in trauma: simple as ABC (assessment of blood consumption)?

Authors

Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA

Source

J Trauma. 2009;66(2):346-352

DOI

10.1097/TA.0b013e3181961c35

Worked example

Also searched as

• ABC score
• assessment of blood consumption
• Nunez ABC
• trauma ABC score
• ABC massive transfusion
• FAST ABC score

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/abc_score?penetrating=false&systolic_mm_hg=120&heart_rate_bpm=80&positive_fast=false

Full URL: https://api.magentlab.com/api/calc/abc_score?penetrating=false&systolic_mm_hg=120&heart_rate_bpm=80&positive_fast=false

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/abc_score?penetrating=false&systolic_mm_hg=120&heart_rate_bpm=80&positive_fast=false"

Parameters

Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

POST /api/calc/abc_score Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 PREVIEW

• 1 to 25 items. Each item uses the same keys as the GET query parameters.
• POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
• The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
• HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
• Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
• x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request (fixture)

{
  "items": [
    {
      "heart_rate_bpm": "80",
      "penetrating": "false",
      "positive_fast": "false",
      "systolic_mm_hg": "120"
    },
    {
      "heart_rate_bpm": "80",
      "penetrating": "false",
      "positive_fast": "false",
      "systolic_mm_hg": "120"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/abc_score",
  "items": [
    {
      "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.",
      "citation": {
        "authors": "Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA",
        "doi": "10.1097/TA.0b013e3181961c35",
        "id": "nunez-2009",
        "pmid": "19204506",
        "source": "J Trauma. 2009;66(2):346-352",
        "title": "Early prediction of massive transfusion in trauma: simple as ABC (assessment of blood consumption)?"
      },
      "formula": "abc_score",
      "formula_expression": "ABC = penetrating + sbp_le_90 + hr_ge_120 + positive_fast; each 1; max 4; score_ge_2 iff score >= 2",
      "max_score": 4,
      "score": 0,
      "score_ge_2": false
    },
    {
      "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.",
      "citation": {
        "authors": "Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA",
        "doi": "10.1097/TA.0b013e3181961c35",
        "id": "nunez-2009",
        "pmid": "19204506",
        "source": "J Trauma. 2009;66(2):346-352",
        "title": "Early prediction of massive transfusion in trauma: simple as ABC (assessment of blood consumption)?"
      },
      "formula": "abc_score",
      "formula_expression": "ABC = penetrating + sbp_le_90 + hr_ge_120 + positive_fast; each 1; max 4; score_ge_2 iff score >= 2",
      "max_score": 4,
      "score": 0,
      "score_ge_2": false
    }
  ]
}

Response

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup.

{
  "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.",
  "citation": {
    "authors": "Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA",
    "doi": "10.1097/TA.0b013e3181961c35",
    "id": "nunez-2009",
    "pmid": "19204506",
    "source": "J Trauma. 2009;66(2):346-352",
    "title": "Early prediction of massive transfusion in trauma: simple as ABC (assessment of blood consumption)?"
  },
  "formula": "abc_score",
  "formula_expression": "ABC = penetrating + sbp_le_90 + hr_ge_120 + positive_fast; each 1; max 4; score_ge_2 iff score >= 2",
  "max_score": 4,
  "score": 0,
  "score_ge_2": false
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

Related tools

• ISS — Compute the Baker 1974 Injury Severity Score as the sum of squares of the three highest caller-assigned AIS body-region grades, or 75 if any region is AIS 6.
• RTS — Compute Champion 1989 coded GCS, SBP, and respiratory-rate values, the triage T-RTS sum, and the weighted RTS used for outcome evaluation.

Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /docs/mcp.

Guarantees

• HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged.
• exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
• HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
• Execution is timeout-bounded and concurrency-capped.
• Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.