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Rome IV functional abdominal bloating

Rome IV Bloating

Apply the Mearin 2016 Rome IV C4 functional abdominal bloating/distension criteria and return whether the published C4 box holds (rome_iv_bloating).

LIVE $0.005 USDC GET /api/calc/rome_iv_bloating

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

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

What it computes

Apply the Mearin 2016 Rome IV C4 functional abdominal bloating/distension criteria and return whether the published C4 box holds (rome_iv_bloating).

When to use

When an agent already has the three caller-assigned Rome IV C4 flags as in Mearin 2016 and needs whether the published functional abdominal bloating/distension box holds. magent does not examine the patient.

When not to use

Not a medical device.
Not a diagnosis. magent does not diagnose functional abdominal bloating or distension.
The caller assigns the three flags. magent does not examine the patient.
This tool is adult Rome IV C4 functional abdominal bloating/distension only. Not child, not IBS, not functional constipation, not functional diarrhea, and not PDS or functional dyspepsia as a substitute.

Formula

rome_iv_bloating iff criteria_last_3_months_onset_6_months and recurrent_bloating_or_distension_ge_1_day_week_predominant and insufficient_criteria_for_ibs_fc_diarrhea_pds (Mearin 2016 Rome IV C4 functional abdominal bloating/distension)

Citation

Title: Bowel Disorders
Authors: Mearin F, Lacy BE, Chang L, Chey WD, Lembo AJ, Simren M, Spiller RC
Source: Gastroenterology. 2016;150(6):1393-1407
DOI: 10.1053/j.gastro.2016.02.031

Worked example

Timing, predominant bloating or distension, and not another disorder

Given: criteria_last_3_months_onset_6_months=trueinsufficient_criteria_for_ibs_fc_diarrhea_pds=truerecurrent_bloating_or_distension_ge_1_day_week_predominant=true

Criteria fulfilled for the last 3 months with onset at least 6 months prior is true
Recurrent bloating or distension ≥1 day/week that predominates over other symptoms is true
Insufficient criteria for IBS, functional constipation, functional diarrhea, or PDS is true
rome_iv_bloating is true

Timing and predominant bloating with another disorder's criteria met

Given: criteria_last_3_months_onset_6_months=trueinsufficient_criteria_for_ibs_fc_diarrhea_pds=falserecurrent_bloating_or_distension_ge_1_day_week_predominant=true

Timing and recurrent bloating or distension that predominates hold
Insufficient criteria for IBS, functional constipation, functional diarrhea, or PDS is false
rome_iv_bloating is false

Also searched as

Rome IV functional bloating
Rome IV C4
Mearin 2016 bloating
functional abdominal bloating
functional abdominal distension
Rome IV bloating
adult functional bloating
bloating Rome IV
Mearin C4 bloating

Try

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

/api/calc/rome_iv_bloating?criteria_last_3_months_onset_6_months=true&recurrent_bloating_or_distension_ge_1_day_week_predominant=true&insufficient_criteria_for_ibs_fc_diarrhea_pds=true

Full URL: https://api.magentlab.com/api/calc/rome_iv_bloating?criteria_last_3_months_onset_6_months=true&recurrent_bloating_or_distension_ge_1_day_week_predominant=true&insufficient_criteria_for_ibs_fc_diarrhea_pds=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_bloating?criteria_last_3_months_onset_6_months=true&recurrent_bloating_or_distension_ge_1_day_week_predominant=true&insufficient_criteria_for_ibs_fc_diarrhea_pds=true"

Parameters

Name	Type	Required	Description
`criteria_last_3_months_onset_6_months`	boolean	required	Criteria fulfilled for the last 3 months with symptom onset at least 6 months prior to diagnosis, as assigned (Mearin 2016 C4). true or false as assigned by the caller. magent does not take a history.
`recurrent_bloating_or_distension_ge_1_day_week_predominant`	boolean	required	Recurrent bloating or visible distension, on average at least 1 day per week, that predominates over other bowel symptoms (Mearin 2016 C4). true or false as assigned by the caller. magent does not examine the patient.
`insufficient_criteria_for_ibs_fc_diarrhea_pds`	boolean	required	Insufficient criteria for IBS, functional constipation, functional diarrhea, or postprandial distress syndrome, as assigned by the caller (Mearin 2016 C4). true or false. magent does not apply those other boxes.

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_bloating 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": [
    {
      "criteria_last_3_months_onset_6_months": "true",
      "insufficient_criteria_for_ibs_fc_diarrhea_pds": "true",
      "recurrent_bloating_or_distension_ge_1_day_week_predominant": "true"
    },
    {
      "criteria_last_3_months_onset_6_months": "true",
      "insufficient_criteria_for_ibs_fc_diarrhea_pds": "true",
      "recurrent_bloating_or_distension_ge_1_day_week_predominant": "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_bloating",
  "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": "Mearin F, Lacy BE, Chang L, Chey WD, Lembo AJ, Simren M, Spiller RC",
        "doi": "10.1053/j.gastro.2016.02.031",
        "id": "mearin-2016",
        "pmid": "27144627",
        "source": "Gastroenterology. 2016;150(6):1393-1407",
        "title": "Bowel Disorders"
      },
      "formula": "rome_iv_bloating",
      "formula_expression": "rome_iv_bloating iff criteria_last_3_months_onset_6_months and recurrent_bloating_or_distension_ge_1_day_week_predominant and insufficient_criteria_for_ibs_fc_diarrhea_pds (Mearin 2016 Rome IV C4 functional abdominal bloating/distension)",
      "criteria": [
        {
          "factor": "criteria_last_3_months_onset_6_months",
          "met": true
        },
        {
          "factor": "recurrent_bloating_or_distension_ge_1_day_week_predominant",
          "met": true
        },
        {
          "factor": "insufficient_criteria_for_ibs_fc_diarrhea_pds",
          "met": true
        }
      ],
      "rome_iv_bloating": 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": "Mearin F, Lacy BE, Chang L, Chey WD, Lembo AJ, Simren M, Spiller RC",
        "doi": "10.1053/j.gastro.2016.02.031",
        "id": "mearin-2016",
        "pmid": "27144627",
        "source": "Gastroenterology. 2016;150(6):1393-1407",
        "title": "Bowel Disorders"
      },
      "formula": "rome_iv_bloating",
      "formula_expression": "rome_iv_bloating iff criteria_last_3_months_onset_6_months and recurrent_bloating_or_distension_ge_1_day_week_predominant and insufficient_criteria_for_ibs_fc_diarrhea_pds (Mearin 2016 Rome IV C4 functional abdominal bloating/distension)",
      "criteria": [
        {
          "factor": "criteria_last_3_months_onset_6_months",
          "met": true
        },
        {
          "factor": "recurrent_bloating_or_distension_ge_1_day_week_predominant",
          "met": true
        },
        {
          "factor": "insufficient_criteria_for_ibs_fc_diarrhea_pds",
          "met": true
        }
      ],
      "rome_iv_bloating": true
    }
  ]
}

Response

Field	Type	Description
`formula`	string	rome_iv_bloating
`formula_expression`	string	Mearin 2016 Rome IV C4: last 3 months with 6-month onset, recurrent bloating or distension ≥1 day/week that predominates, and insufficient IBS, functional constipation, functional diarrhea, or PDS criteria
`rome_iv_bloating`	boolean	true only when timing, recurrent bloating or distension ≥1 day/week that predominates, and insufficient criteria for IBS, functional constipation, functional diarrhea, or PDS all hold. Not a diagnosis.
`criteria`	array	Per-factor rows with factor and met for the three C4 flags
`citation`	object	Mearin 2016 Gastroenterology citation
`disclaimer`	string	Not-a-device notice

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": "Mearin F, Lacy BE, Chang L, Chey WD, Lembo AJ, Simren M, Spiller RC",
    "doi": "10.1053/j.gastro.2016.02.031",
    "id": "mearin-2016",
    "pmid": "27144627",
    "source": "Gastroenterology. 2016;150(6):1393-1407",
    "title": "Bowel Disorders"
  },
  "formula": "rome_iv_bloating",
  "formula_expression": "rome_iv_bloating iff criteria_last_3_months_onset_6_months and recurrent_bloating_or_distension_ge_1_day_week_predominant and insufficient_criteria_for_ibs_fc_diarrhea_pds (Mearin 2016 Rome IV C4 functional abdominal bloating/distension)",
  "criteria": [
    {
      "factor": "criteria_last_3_months_onset_6_months",
      "met": true
    },
    {
      "factor": "recurrent_bloating_or_distension_ge_1_day_week_predominant",
      "met": true
    },
    {
      "factor": "insufficient_criteria_for_ibs_fc_diarrhea_pds",
      "met": true
    }
  ],
  "rome_iv_bloating": true
}

Client errors (HTTP 400)

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

HTTP	Code	When
400	`invalid_flag`	boolean clinical flags must be true or false Returned before settlement; you are not charged.
400	`invalid_items`	POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400	`invalid_item_count`	items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400	`invalid_item`	each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

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).
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 Diarrhea — Apply the Mearin 2016 Rome IV C3 functional diarrhea criteria and return whether the published C3 box holds (rome_iv_diarrhea).

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.