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Rome IV rumination syndrome

Rome IV rumination

Apply the Stanghellini 2016 Rome IV rumination syndrome (B4) diagnostic criteria and return whether the published rumination box holds (rome_iv_rumination).

LIVE $0.005 USDC GET /api/calc/rome_iv_rumination

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

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

What it computes

Apply the Stanghellini 2016 Rome IV rumination syndrome (B4) diagnostic criteria and return whether the published rumination box holds (rome_iv_rumination).

When to use

When an agent already has the four caller-assigned Stanghellini 2016 Rome IV rumination syndrome flags and needs whether the published rumination box holds. magent does not observe regurgitation.

When not to use

Not a medical device.
Not a diagnosis. magent does not diagnose rumination syndrome.
The caller assigns the four flags. magent does not observe regurgitation.
This tool is Stanghellini 2016 Rome IV rumination syndrome (B4) only. Supportive remarks (effortless regurgitation, not preceded by nausea, recognizable food, ceases when acidic) are copy-only and are not parsed. Not cannabinoid hyperemesis syndrome (CHS). Not cyclic vomiting syndrome (CVS). Not GERD.

Formula

rome_iv_rumination iff persistent_or_recurrent_regurgitation_of_recently_ingested_food and regurgitation_not_preceded_by_retching and fulfilled_last_3_months and onset_at_least_6_months (Stanghellini 2016 Rome IV rumination syndrome)

Citation

Title: Gastroduodenal Disorders
Authors: Stanghellini V, Chan FKL, Hasler WL, Malagelada JR, Suzuki H, Tack J, Talley NJ
Source: Gastroenterology. 2016;150(6):1380-1392
DOI: 10.1053/j.gastro.2016.02.011

Worked example

All four required flags

Given: fulfilled_last_3_months=trueonset_at_least_6_months=truepersistent_or_recurrent_regurgitation_of_recently_ingested_food=trueregurgitation_not_preceded_by_retching=true

Persistent or recurrent regurgitation of recently ingested food with subsequent spitting or remastication and swallowing is true
Regurgitation is not preceded by retching
Criteria fulfilled for the last 3 months and onset at least 6 months prior are true
rome_iv_rumination is true

Three required flags without 6-month onset

Given: fulfilled_last_3_months=trueonset_at_least_6_months=falsepersistent_or_recurrent_regurgitation_of_recently_ingested_food=trueregurgitation_not_preceded_by_retching=true

Three required flags hold
Onset at least 6 months prior is false
rome_iv_rumination is false

Also searched as

Rome IV rumination
Rome IV rumination syndrome
Stanghellini 2016 rumination
rumination syndrome Rome IV
Rome IV B4 rumination
gastroduodenal rumination
rumination diagnostic criteria
Rome IV regurgitation of food

Try

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

/api/calc/rome_iv_rumination?persistent_or_recurrent_regurgitation_of_recently_ingested_food=true&regurgitation_not_preceded_by_retching=true&fulfilled_last_3_months=true&onset_at_least_6_months=true

Full URL: https://api.magentlab.com/api/calc/rome_iv_rumination?persistent_or_recurrent_regurgitation_of_recently_ingested_food=true&regurgitation_not_preceded_by_retching=true&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_rumination?persistent_or_recurrent_regurgitation_of_recently_ingested_food=true&regurgitation_not_preceded_by_retching=true&fulfilled_last_3_months=true&onset_at_least_6_months=true"

Parameters

Name	Type	Required	Description
`persistent_or_recurrent_regurgitation_of_recently_ingested_food`	boolean	required	Persistent or recurrent regurgitation of recently ingested food into the mouth with subsequent spitting or remastication and swallowing (Stanghellini 2016 Rome IV rumination syndrome B4). true or false as assigned by the caller. magent does not observe regurgitation.
`regurgitation_not_preceded_by_retching`	boolean	required	Regurgitation is not preceded by retching (Stanghellini 2016). true or false as assigned by the caller. magent does not observe regurgitation.
`fulfilled_last_3_months`	boolean	required	Criteria fulfilled for the last 3 months, as assigned (Stanghellini 2016). true or false as assigned by the caller. magent does not take a history.
`onset_at_least_6_months`	boolean	required	Symptom onset at least 6 months prior to diagnosis, as assigned (Stanghellini 2016). true or false as assigned by the caller. magent does not take a history.

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_rumination 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": [
    {
      "fulfilled_last_3_months": "true",
      "onset_at_least_6_months": "true",
      "persistent_or_recurrent_regurgitation_of_recently_ingested_food": "true",
      "regurgitation_not_preceded_by_retching": "true"
    },
    {
      "fulfilled_last_3_months": "true",
      "onset_at_least_6_months": "true",
      "persistent_or_recurrent_regurgitation_of_recently_ingested_food": "true",
      "regurgitation_not_preceded_by_retching": "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_rumination",
  "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": "Stanghellini V, Chan FKL, Hasler WL, Malagelada JR, Suzuki H, Tack J, Talley NJ",
        "doi": "10.1053/j.gastro.2016.02.011",
        "id": "stanghellini-2016",
        "pmid": "27147122",
        "source": "Gastroenterology. 2016;150(6):1380-1392",
        "title": "Gastroduodenal Disorders"
      },
      "formula": "rome_iv_rumination",
      "formula_expression": "rome_iv_rumination iff persistent_or_recurrent_regurgitation_of_recently_ingested_food and regurgitation_not_preceded_by_retching and fulfilled_last_3_months and onset_at_least_6_months (Stanghellini 2016 Rome IV rumination syndrome)",
      "criteria": [
        {
          "factor": "persistent_or_recurrent_regurgitation_of_recently_ingested_food",
          "met": true
        },
        {
          "factor": "regurgitation_not_preceded_by_retching",
          "met": true
        },
        {
          "factor": "fulfilled_last_3_months",
          "met": true
        },
        {
          "factor": "onset_at_least_6_months",
          "met": true
        }
      ],
      "rome_iv_rumination": 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": "Stanghellini V, Chan FKL, Hasler WL, Malagelada JR, Suzuki H, Tack J, Talley NJ",
        "doi": "10.1053/j.gastro.2016.02.011",
        "id": "stanghellini-2016",
        "pmid": "27147122",
        "source": "Gastroenterology. 2016;150(6):1380-1392",
        "title": "Gastroduodenal Disorders"
      },
      "formula": "rome_iv_rumination",
      "formula_expression": "rome_iv_rumination iff persistent_or_recurrent_regurgitation_of_recently_ingested_food and regurgitation_not_preceded_by_retching and fulfilled_last_3_months and onset_at_least_6_months (Stanghellini 2016 Rome IV rumination syndrome)",
      "criteria": [
        {
          "factor": "persistent_or_recurrent_regurgitation_of_recently_ingested_food",
          "met": true
        },
        {
          "factor": "regurgitation_not_preceded_by_retching",
          "met": true
        },
        {
          "factor": "fulfilled_last_3_months",
          "met": true
        },
        {
          "factor": "onset_at_least_6_months",
          "met": true
        }
      ],
      "rome_iv_rumination": true
    }
  ]
}

Response

Field	Type	Description
`formula`	string	rome_iv_rumination
`formula_expression`	string	Stanghellini 2016 Rome IV rumination syndrome B4: persistent or recurrent regurgitation of recently ingested food with subsequent spitting or remastication and swallowing, regurgitation not preceded by retching, last-3-months criteria, and 6-month onset
`rome_iv_rumination`	boolean	true only when all four required flags hold. Not a diagnosis.
`criteria`	array	Per-factor rows with factor and met for the four required flags
`citation`	object	Stanghellini 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": "Stanghellini V, Chan FKL, Hasler WL, Malagelada JR, Suzuki H, Tack J, Talley NJ",
    "doi": "10.1053/j.gastro.2016.02.011",
    "id": "stanghellini-2016",
    "pmid": "27147122",
    "source": "Gastroenterology. 2016;150(6):1380-1392",
    "title": "Gastroduodenal Disorders"
  },
  "formula": "rome_iv_rumination",
  "formula_expression": "rome_iv_rumination iff persistent_or_recurrent_regurgitation_of_recently_ingested_food and regurgitation_not_preceded_by_retching and fulfilled_last_3_months and onset_at_least_6_months (Stanghellini 2016 Rome IV rumination syndrome)",
  "criteria": [
    {
      "factor": "persistent_or_recurrent_regurgitation_of_recently_ingested_food",
      "met": true
    },
    {
      "factor": "regurgitation_not_preceded_by_retching",
      "met": true
    },
    {
      "factor": "fulfilled_last_3_months",
      "met": true
    },
    {
      "factor": "onset_at_least_6_months",
      "met": true
    }
  ],
  "rome_iv_rumination": true
}

Client errors (HTTP 400)

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

HTTP	Code	When
400	`invalid_rome_iv_rumination`	Rome IV rumination needs the Stanghellini 2016 gastroduodenal rumination flags. Returned before settlement; you are not charged.
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 CHS — Apply the Stanghellini 2016 Rome IV cannabinoid hyperemesis syndrome diagnostic criteria and return whether the published CHS box holds (rome_iv_chs) plus the supportive pathologic_bathing flag.
Rome IV CVS — Apply the Stanghellini 2016 Rome IV adult cyclic vomiting syndrome B3b diagnostic criteria and return whether the published CVS box holds (rome_iv_cvs) plus the supportive migraine_history flag.

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.