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Rome IV F3 functional defecation disorders

Rome IV functional defecation

Apply the Rao 2016 Rome IV F3 functional defecation disorders criteria and return evacuation_tests_met (0-3) and whether the published F3 parent box holds (rome_iv_functional_defecation).

LIVE $0.005 USDC GET /api/calc/rome_iv_functional_defecation

Markdown: /docs/rome-iv-functional-defecation.md · Canonical: https://magentlab.com/docs/rome-iv-functional-defecation

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

What it computes

Apply the Rao 2016 Rome IV F3 functional defecation disorders criteria and return evacuation_tests_met (0-3) and whether the published F3 parent box holds (rome_iv_functional_defecation).

When to use

When an agent already has the caller-assigned Rao 2016 F3 flags (FC and/or IBS with constipation already satisfied, plus the three evacuation-test results and timing) and needs whether the published F3 parent box holds. magent does not re-run FC or IBS-C and does not perform balloon expulsion, manometry, EMG, or imaging.

When not to use

• Not a medical device.
• Not a diagnosis. magent does not diagnose functional defecation disorders.
• The caller assigns the six flags. magent does not perform balloon expulsion, anorectal manometry, anal surface EMG, or imaging, and does not re-run functional constipation or IBS with constipation.
• This tool is the Rao 2016 Rome IV F3 parent box only. F3a inadequate propulsion and F3b dyssynergic defecation apply to patients who already satisfy FDD and are copy-only; they are not separate diagnoses from this tool.

Formula

rome_iv_functional_defecation iff satisfies_fc_and_or_ibs_with_constipation and evacuation_tests_met >= 2 and fulfilled_last_3_months and onset_at_least_6_months; evacuation_tests_met counts abnormal_balloon_expulsion, abnormal_anorectal_evacuation_pattern_manometry_or_emg, and impaired_rectal_evacuation_by_imaging (Rao 2016 Rome IV F3 functional defecation disorders)

Citation

Title

Anorectal Disorders

Authors

Rao SSC, Bharucha AE, Chiarioni G, Felt-Bersma R, Knowles C, Malcolm A, Wald A

Source

Gastroenterology. 2016;150(6):1430-1442

DOI

10.1053/j.gastro.2016.02.009

Worked example

Also searched as

• Rome IV functional defecation
• Rome IV F3
• Rao 2016 F3
• functional defecation disorders
• Rome IV FDD
• balloon expulsion Rome IV
• anorectal manometry EMG Rome IV
• Rao 2016 anorectal disorders
• impaired rectal evacuation

Try

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

/api/calc/rome_iv_functional_defecation?satisfies_fc_and_or_ibs_with_constipation=true&abnormal_balloon_expulsion=true&abnormal_anorectal_evacuation_pattern_manometry_or_emg=true&impaired_rectal_evacuation_by_imaging=false&fulfilled_last_3_months=true&onset_at_least_6_months=true

Full URL: https://api.magentlab.com/api/calc/rome_iv_functional_defecation?satisfies_fc_and_or_ibs_with_constipation=true&abnormal_balloon_expulsion=true&abnormal_anorectal_evacuation_pattern_manometry_or_emg=true&impaired_rectal_evacuation_by_imaging=false&fulfilled_last_3_months=true&onset_at_least_6_months=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/rome_iv_functional_defecation?satisfies_fc_and_or_ibs_with_constipation=true&abnormal_balloon_expulsion=true&abnormal_anorectal_evacuation_pattern_manometry_or_emg=true&impaired_rectal_evacuation_by_imaging=false&fulfilled_last_3_months=true&onset_at_least_6_months=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/rome_iv_functional_defecation 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": [
    {
      "abnormal_anorectal_evacuation_pattern_manometry_or_emg": "true",
      "abnormal_balloon_expulsion": "true",
      "fulfilled_last_3_months": "true",
      "impaired_rectal_evacuation_by_imaging": "false",
      "onset_at_least_6_months": "true",
      "satisfies_fc_and_or_ibs_with_constipation": "true"
    },
    {
      "abnormal_anorectal_evacuation_pattern_manometry_or_emg": "true",
      "abnormal_balloon_expulsion": "true",
      "fulfilled_last_3_months": "true",
      "impaired_rectal_evacuation_by_imaging": "false",
      "onset_at_least_6_months": "true",
      "satisfies_fc_and_or_ibs_with_constipation": "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/rome_iv_functional_defecation",
  "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": "Rao SSC, Bharucha AE, Chiarioni G, Felt-Bersma R, Knowles C, Malcolm A, Wald A",
        "doi": "10.1053/j.gastro.2016.02.009",
        "id": "rao-2016",
        "pmid": "27144630",
        "source": "Gastroenterology. 2016;150(6):1430-1442",
        "title": "Anorectal Disorders"
      },
      "formula": "rome_iv_functional_defecation",
      "formula_expression": "rome_iv_functional_defecation iff satisfies_fc_and_or_ibs_with_constipation and evacuation_tests_met >= 2 and fulfilled_last_3_months and onset_at_least_6_months; evacuation_tests_met counts abnormal_balloon_expulsion, abnormal_anorectal_evacuation_pattern_manometry_or_emg, and impaired_rectal_evacuation_by_imaging (Rao 2016 Rome IV F3 functional defecation disorders)",
      "criteria": [
        {
          "factor": "satisfies_fc_and_or_ibs_with_constipation",
          "met": true
        },
        {
          "factor": "abnormal_balloon_expulsion",
          "met": true
        },
        {
          "factor": "abnormal_anorectal_evacuation_pattern_manometry_or_emg",
          "met": true
        },
        {
          "factor": "impaired_rectal_evacuation_by_imaging",
          "met": false
        },
        {
          "factor": "fulfilled_last_3_months",
          "met": true
        },
        {
          "factor": "onset_at_least_6_months",
          "met": true
        },
        {
          "value": 2,
          "factor": "evacuation_tests_ge_2",
          "met": true
        }
      ],
      "evacuation_tests_met": 2,
      "rome_iv_functional_defecation": true
    },
    {
      "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": "Rao SSC, Bharucha AE, Chiarioni G, Felt-Bersma R, Knowles C, Malcolm A, Wald A",
        "doi": "10.1053/j.gastro.2016.02.009",
        "id": "rao-2016",
        "pmid": "27144630",
        "source": "Gastroenterology. 2016;150(6):1430-1442",
        "title": "Anorectal Disorders"
      },
      "formula": "rome_iv_functional_defecation",
      "formula_expression": "rome_iv_functional_defecation iff satisfies_fc_and_or_ibs_with_constipation and evacuation_tests_met >= 2 and fulfilled_last_3_months and onset_at_least_6_months; evacuation_tests_met counts abnormal_balloon_expulsion, abnormal_anorectal_evacuation_pattern_manometry_or_emg, and impaired_rectal_evacuation_by_imaging (Rao 2016 Rome IV F3 functional defecation disorders)",
      "criteria": [
        {
          "factor": "satisfies_fc_and_or_ibs_with_constipation",
          "met": true
        },
        {
          "factor": "abnormal_balloon_expulsion",
          "met": true
        },
        {
          "factor": "abnormal_anorectal_evacuation_pattern_manometry_or_emg",
          "met": true
        },
        {
          "factor": "impaired_rectal_evacuation_by_imaging",
          "met": false
        },
        {
          "factor": "fulfilled_last_3_months",
          "met": true
        },
        {
          "factor": "onset_at_least_6_months",
          "met": true
        },
        {
          "value": 2,
          "factor": "evacuation_tests_ge_2",
          "met": true
        }
      ],
      "evacuation_tests_met": 2,
      "rome_iv_functional_defecation": true
    }
  ]
}

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": "Rao SSC, Bharucha AE, Chiarioni G, Felt-Bersma R, Knowles C, Malcolm A, Wald A",
    "doi": "10.1053/j.gastro.2016.02.009",
    "id": "rao-2016",
    "pmid": "27144630",
    "source": "Gastroenterology. 2016;150(6):1430-1442",
    "title": "Anorectal Disorders"
  },
  "formula": "rome_iv_functional_defecation",
  "formula_expression": "rome_iv_functional_defecation iff satisfies_fc_and_or_ibs_with_constipation and evacuation_tests_met >= 2 and fulfilled_last_3_months and onset_at_least_6_months; evacuation_tests_met counts abnormal_balloon_expulsion, abnormal_anorectal_evacuation_pattern_manometry_or_emg, and impaired_rectal_evacuation_by_imaging (Rao 2016 Rome IV F3 functional defecation disorders)",
  "criteria": [
    {
      "factor": "satisfies_fc_and_or_ibs_with_constipation",
      "met": true
    },
    {
      "factor": "abnormal_balloon_expulsion",
      "met": true
    },
    {
      "factor": "abnormal_anorectal_evacuation_pattern_manometry_or_emg",
      "met": true
    },
    {
      "factor": "impaired_rectal_evacuation_by_imaging",
      "met": false
    },
    {
      "factor": "fulfilled_last_3_months",
      "met": true
    },
    {
      "factor": "onset_at_least_6_months",
      "met": true
    },
    {
      "value": 2,
      "factor": "evacuation_tests_ge_2",
      "met": true
    }
  ],
  "evacuation_tests_met": 2,
  "rome_iv_functional_defecation": true
}

Client errors (HTTP 400)

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

Related tools

• Rome IV FC — Apply the Mearin 2016 Rome IV C2 functional constipation criteria and return symptom_count (0-6) and whether the published C2 box holds (rome_iv_fc).
• Rome IV IBS — Apply the Mearin 2016 Rome IV IBS diagnostic criteria and return supporting_features_met (0-3) and whether the published IBS box holds (rome_iv_ibs).

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.