Respiratory · LIVE

Brescia-COVID Respiratory Severity Scale

BCRSS

Count the four Duca 2020 BCRSS testing-criteria binaries as assigned by the caller and return the integer total (0–4).

LIVE $0.005 USDC GET /api/calc/brescia_covid

Markdown: /docs/brescia-covid.md · Canonical: https://magentlab.com/docs/brescia-covid

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

What it computes

Count the four Duca 2020 BCRSS testing-criteria binaries as assigned by the caller and return the integer total (0–4).

When to use

When an agent already has the four Duca 2020 testing-criteria flags and needs the published 0–4 count. magent does not examine the patient, count breaths, measure SpO2 or PaO2, or read imaging.

When not to use

• Not a medical device and not a COVID-19 diagnosis or ventilator order. magent does not examine the patient or read imaging.
• This is the Duca 2020 testing-criteria count only (four caller-assigned binaries; 0–4). It is not the 0–8 NIV, intubation, proning, or neuromuscular-blockade ladder.
• The caller assigns wheezing or inability to speak in full sentences, respiratory rate >22, PaO2 <65 mmHg or SpO2 <90%, and significant chest-radiograph worsening. magent does not measure vitals or interpret radiographs.
• The scale was rapidly developed in Brescia during the 2020 crisis and has not been validated in other populations. magent returns the integer count only.

Formula

bcrss = wheezing_or_unable_full_sentences + respiratory_rate_gt_22 + pao2_lt_65_or_spo2_lt_90 + chest_radiograph_worsening; each 1 if true; Duca 2020 BCRSS testing criteria; max 4

Citation

Title

Calculated Decisions: Brescia-COVID Respiratory Severity Scale (BCRSS)/Algorithm

Authors

Duca A, Piva S, Focà E, Latronico N, Rizzi M

Source

Emerg Med Pract. 2020 Apr 16;22(5 Suppl):CD1-CD2

DOI

none

Worked example

Also searched as

• BCRSS
• Brescia-COVID Respiratory Severity Scale
• Brescia COVID
• Duca BCRSS
• BCRSS algorithm
• Brescia-COVID scale
• COVID respiratory severity
• BCRSS testing criteria

Try

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

/api/calc/brescia_covid?wheezing_or_unable_full_sentences=false&respiratory_rate_gt_22=false&pao2_lt_65_or_spo2_lt_90=false&chest_radiograph_worsening=false

Full URL: https://api.magentlab.com/api/calc/brescia_covid?wheezing_or_unable_full_sentences=false&respiratory_rate_gt_22=false&pao2_lt_65_or_spo2_lt_90=false&chest_radiograph_worsening=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/brescia_covid?wheezing_or_unable_full_sentences=false&respiratory_rate_gt_22=false&pao2_lt_65_or_spo2_lt_90=false&chest_radiograph_worsening=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/brescia_covid 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": [
    {
      "chest_radiograph_worsening": "false",
      "pao2_lt_65_or_spo2_lt_90": "false",
      "respiratory_rate_gt_22": "false",
      "wheezing_or_unable_full_sentences": "false"
    },
    {
      "chest_radiograph_worsening": "false",
      "pao2_lt_65_or_spo2_lt_90": "false",
      "respiratory_rate_gt_22": "false",
      "wheezing_or_unable_full_sentences": "false"
    }
  ]
}

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/brescia_covid",
  "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": "Duca A, Piva S, Focà E, Latronico N, Rizzi M",
        "id": "duca-2020",
        "pmid": "32297727",
        "source": "Emerg Med Pract. 2020 Apr 16;22(5 Suppl):CD1-CD2",
        "title": "Calculated Decisions: Brescia-COVID Respiratory Severity Scale (BCRSS)/Algorithm"
      },
      "formula": "brescia_covid",
      "formula_expression": "bcrss = wheezing_or_unable_full_sentences + respiratory_rate_gt_22 + pao2_lt_65_or_spo2_lt_90 + chest_radiograph_worsening; each 1 if true; Duca 2020 BCRSS testing criteria; max 4",
      "max_score": 4,
      "criteria": [
        {
          "factor": "wheezing_or_unable_full_sentences",
          "met": false
        },
        {
          "factor": "respiratory_rate_gt_22",
          "met": false
        },
        {
          "factor": "pao2_lt_65_or_spo2_lt_90",
          "met": false
        },
        {
          "factor": "chest_radiograph_worsening",
          "met": false
        }
      ],
      "bcrss": 0
    },
    {
      "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": "Duca A, Piva S, Focà E, Latronico N, Rizzi M",
        "id": "duca-2020",
        "pmid": "32297727",
        "source": "Emerg Med Pract. 2020 Apr 16;22(5 Suppl):CD1-CD2",
        "title": "Calculated Decisions: Brescia-COVID Respiratory Severity Scale (BCRSS)/Algorithm"
      },
      "formula": "brescia_covid",
      "formula_expression": "bcrss = wheezing_or_unable_full_sentences + respiratory_rate_gt_22 + pao2_lt_65_or_spo2_lt_90 + chest_radiograph_worsening; each 1 if true; Duca 2020 BCRSS testing criteria; max 4",
      "max_score": 4,
      "criteria": [
        {
          "factor": "wheezing_or_unable_full_sentences",
          "met": false
        },
        {
          "factor": "respiratory_rate_gt_22",
          "met": false
        },
        {
          "factor": "pao2_lt_65_or_spo2_lt_90",
          "met": false
        },
        {
          "factor": "chest_radiograph_worsening",
          "met": false
        }
      ],
      "bcrss": 0
    }
  ]
}

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": "Duca A, Piva S, Focà E, Latronico N, Rizzi M",
    "id": "duca-2020",
    "pmid": "32297727",
    "source": "Emerg Med Pract. 2020 Apr 16;22(5 Suppl):CD1-CD2",
    "title": "Calculated Decisions: Brescia-COVID Respiratory Severity Scale (BCRSS)/Algorithm"
  },
  "formula": "brescia_covid",
  "formula_expression": "bcrss = wheezing_or_unable_full_sentences + respiratory_rate_gt_22 + pao2_lt_65_or_spo2_lt_90 + chest_radiograph_worsening; each 1 if true; Duca 2020 BCRSS testing criteria; max 4",
  "max_score": 4,
  "criteria": [
    {
      "factor": "wheezing_or_unable_full_sentences",
      "met": false
    },
    {
      "factor": "respiratory_rate_gt_22",
      "met": false
    },
    {
      "factor": "pao2_lt_65_or_spo2_lt_90",
      "met": false
    },
    {
      "factor": "chest_radiograph_worsening",
      "met": false
    }
  ],
  "bcrss": 0
}

Client errors (HTTP 400)

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

Related tools

• qCSI — Sum Haimovich 2020 qCSI bedside points (Table 2) from respiratory rate, lowest SpO2, and nasal-cannula oxygen flow and return the integer total (max 12).
• LIPS — Sum Gajic 2011 Table 3 lung injury prediction score items from caller-assigned flags and return the published ROC cutoff band (low <4, high ≥4).

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.