Emergency · LIVE

BRUE definition

BRUE

Apply the Tieder 2016 AAP BRUE definition and return feature_count (0-4) and whether the published definition box holds (brue).

LIVE $0.005 USDC GET /api/calc/brue

Markdown: /docs/brue.md · Canonical: https://magentlab.com/docs/brue

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

What it computes

Apply the Tieder 2016 AAP BRUE definition and return feature_count (0-4) and whether the published definition box holds (brue).

When to use

When an agent already has the seven caller-assigned Tieder 2016 BRUE definition flags and needs whether the published definition box holds. magent does not examine the infant.

When not to use

• Not a medical device.
• Not a diagnosis. magent does not diagnose BRUE, ALTE, or SIDS.
• The caller assigns the seven flags. magent does not examine the infant or take a history.
• This tool is the Tieder 2016 AAP BRUE definition box only. It does not implement the lower-risk subset or the lower-risk management key-action statements. BRUE replaced ALTE; this tool is not an ALTE diagnosis and is not a SIDS diagnosis.

Formula

brue iff age_under_1_year and sudden_brief_now_resolved and unexplained_after_history_exam and feature_count >= 1; feature_count counts cyanosis_or_pallor, absent_decreased_irregular_breathing, marked_tone_change, and altered_responsiveness (Tieder 2016 AAP BRUE definition)

Citation

Title

Brief Resolved Unexplained Events (Formerly Apparent Life-Threatening Events) and Evaluation of Lower-Risk Infants

Authors

Tieder JS, Bonkowsky JL, Etzel RA, et al; American Academy of Pediatrics Subcommittee on Apparent Life-Threatening Events

Source

Pediatrics. 2016;137(5):e20160590

DOI

10.1542/peds.2016-0590

Worked example

Also searched as

• Brief Resolved Unexplained Event
• BRUE AAP
• Tieder 2016 BRUE
• apparent life-threatening event
• AAP BRUE guideline
• brief resolved unexplained events
• BRUE definition
• ALTE replacement BRUE

Try

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

/api/calc/brue?age_under_1_year=true&sudden_brief_now_resolved=true&cyanosis_or_pallor=true&absent_decreased_irregular_breathing=false&marked_tone_change=false&altered_responsiveness=false&unexplained_after_history_exam=true

Full URL: https://api.magentlab.com/api/calc/brue?age_under_1_year=true&sudden_brief_now_resolved=true&cyanosis_or_pallor=true&absent_decreased_irregular_breathing=false&marked_tone_change=false&altered_responsiveness=false&unexplained_after_history_exam=true

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/brue?age_under_1_year=true&sudden_brief_now_resolved=true&cyanosis_or_pallor=true&absent_decreased_irregular_breathing=false&marked_tone_change=false&altered_responsiveness=false&unexplained_after_history_exam=true"

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/brue 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": [
    {
      "absent_decreased_irregular_breathing": "false",
      "age_under_1_year": "true",
      "altered_responsiveness": "false",
      "cyanosis_or_pallor": "true",
      "marked_tone_change": "false",
      "sudden_brief_now_resolved": "true",
      "unexplained_after_history_exam": "true"
    },
    {
      "absent_decreased_irregular_breathing": "false",
      "age_under_1_year": "true",
      "altered_responsiveness": "false",
      "cyanosis_or_pallor": "true",
      "marked_tone_change": "false",
      "sudden_brief_now_resolved": "true",
      "unexplained_after_history_exam": "true"
    }
  ]
}

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/brue",
  "items": [
    {
      "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": "Tieder JS, Bonkowsky JL, Etzel RA, et al; American Academy of Pediatrics Subcommittee on Apparent Life-Threatening Events",
        "doi": "10.1542/peds.2016-0590",
        "id": "tieder-2016",
        "pmid": "27244835",
        "source": "Pediatrics. 2016;137(5):e20160590",
        "title": "Brief Resolved Unexplained Events (Formerly Apparent Life-Threatening Events) and Evaluation of Lower-Risk Infants"
      },
      "formula": "brue",
      "formula_expression": "brue iff age_under_1_year and sudden_brief_now_resolved and unexplained_after_history_exam and feature_count >= 1; feature_count counts cyanosis_or_pallor, absent_decreased_irregular_breathing, marked_tone_change, and altered_responsiveness (Tieder 2016 AAP BRUE definition)",
      "criteria": [
        {
          "factor": "age_under_1_year",
          "met": true
        },
        {
          "factor": "sudden_brief_now_resolved",
          "met": true
        },
        {
          "factor": "cyanosis_or_pallor",
          "met": true
        },
        {
          "factor": "absent_decreased_irregular_breathing",
          "met": false
        },
        {
          "factor": "marked_tone_change",
          "met": false
        },
        {
          "factor": "altered_responsiveness",
          "met": false
        },
        {
          "factor": "unexplained_after_history_exam",
          "met": true
        },
        {
          "value": 1,
          "factor": "feature_count_ge_1",
          "met": true
        }
      ],
      "brue": true,
      "feature_count": 1
    },
    {
      "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": "Tieder JS, Bonkowsky JL, Etzel RA, et al; American Academy of Pediatrics Subcommittee on Apparent Life-Threatening Events",
        "doi": "10.1542/peds.2016-0590",
        "id": "tieder-2016",
        "pmid": "27244835",
        "source": "Pediatrics. 2016;137(5):e20160590",
        "title": "Brief Resolved Unexplained Events (Formerly Apparent Life-Threatening Events) and Evaluation of Lower-Risk Infants"
      },
      "formula": "brue",
      "formula_expression": "brue iff age_under_1_year and sudden_brief_now_resolved and unexplained_after_history_exam and feature_count >= 1; feature_count counts cyanosis_or_pallor, absent_decreased_irregular_breathing, marked_tone_change, and altered_responsiveness (Tieder 2016 AAP BRUE definition)",
      "criteria": [
        {
          "factor": "age_under_1_year",
          "met": true
        },
        {
          "factor": "sudden_brief_now_resolved",
          "met": true
        },
        {
          "factor": "cyanosis_or_pallor",
          "met": true
        },
        {
          "factor": "absent_decreased_irregular_breathing",
          "met": false
        },
        {
          "factor": "marked_tone_change",
          "met": false
        },
        {
          "factor": "altered_responsiveness",
          "met": false
        },
        {
          "factor": "unexplained_after_history_exam",
          "met": true
        },
        {
          "value": 1,
          "factor": "feature_count_ge_1",
          "met": true
        }
      ],
      "brue": true,
      "feature_count": 1
    }
  ]
}

Response

Example JSON

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

{
  "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": "Tieder JS, Bonkowsky JL, Etzel RA, et al; American Academy of Pediatrics Subcommittee on Apparent Life-Threatening Events",
    "doi": "10.1542/peds.2016-0590",
    "id": "tieder-2016",
    "pmid": "27244835",
    "source": "Pediatrics. 2016;137(5):e20160590",
    "title": "Brief Resolved Unexplained Events (Formerly Apparent Life-Threatening Events) and Evaluation of Lower-Risk Infants"
  },
  "formula": "brue",
  "formula_expression": "brue iff age_under_1_year and sudden_brief_now_resolved and unexplained_after_history_exam and feature_count >= 1; feature_count counts cyanosis_or_pallor, absent_decreased_irregular_breathing, marked_tone_change, and altered_responsiveness (Tieder 2016 AAP BRUE definition)",
  "criteria": [
    {
      "factor": "age_under_1_year",
      "met": true
    },
    {
      "factor": "sudden_brief_now_resolved",
      "met": true
    },
    {
      "factor": "cyanosis_or_pallor",
      "met": true
    },
    {
      "factor": "absent_decreased_irregular_breathing",
      "met": false
    },
    {
      "factor": "marked_tone_change",
      "met": false
    },
    {
      "factor": "altered_responsiveness",
      "met": false
    },
    {
      "factor": "unexplained_after_history_exam",
      "met": true
    },
    {
      "value": 1,
      "factor": "feature_count_ge_1",
      "met": true
    }
  ],
  "brue": true,
  "feature_count": 1
}

Client errors (HTTP 400)

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

Related tools

• Rochester criteria — Apply the Dagan 1985 Rochester criteria and return low_risk only when every published criterion holds for an infant younger than 3 months.
• PECARN pediatric IAI — Apply the Holmes 2013 PECARN seven-variable prediction rule and return whether the child is at very low risk of intra-abdominal injury requiring acute intervention (all seven caller-assigned findings absent). Does not order a CT.

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. HTTP 402 never includes the tool JSON.
• 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.