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Rome IV Functional Defecation Disorder Calculator (Rao 2016)
x402
Rome IV Functional Defecation Disorder Calculator (Rao 2016) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Evaluates Rome IV criteria for Functional Defecation Disorder (F3) based on caller-supplied test results and history flags, returning a boolean diagnosis indicator and count of met evacuation tests.
Price / call$0.005
Success—
StatusUnknown
How this service works
Rao 2016 Rome IV F3. rome_iv_functional_defecation is true iff FC and/or IBS-C, at least two of three evacuation tests (balloon expulsion, manometry or anal surface EMG, imaging), last-3-months criteria, and 6-month onset. evacuation_tests_met is 0-3. magent does not perform those tests. Not a diagnosis. Not F3a or F3b as separate diagnoses.
Output
Returns rome_iv_functional_defecation (true/false) indicating whether the patient meets Rome IV Functional Defecation Disorder criteria, and evacuation_tests_met (integer 0-3) counting how many of the three evacuation tests were flagged as abnormal. Does not perform tests or take history — all inputs are caller-assigned.
Example use cases
GI clinic post-anorectal workup triage
“My patient with confirmed functional constipation just completed their anorectal workup: balloon expulsion is abnormal, manometry shows abnormal pattern, imaging is normal. Symptoms have been going on for at least 6 months and meet the last-3-months threshold. Do they meet Rome IV F3 criteria?”
IBS-C patient defecation disorder screen
“This IBS with constipation patient had a normal balloon expulsion, abnormal surface EMG, and normal imaging. Criteria were met in the last 3 months and onset was more than 6 months ago. Does their profile satisfy Rome IV functional defecation disorder?”
Teaching case Rome IV F3 rule check
“For a teaching scenario: patient satisfies IBS-C criteria, balloon expulsion is abnormal, imaging shows impaired rectal evacuation, manometry is normal, last-3-months criteria met, onset at least 6 months ago — how many evacuation tests are positive and does the Rome IV F3 rule trigger?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/rome_iv_functional_defecationWhen to prefer
Use this endpoint when you have already assembled caller-coded results from balloon expulsion, manometry/EMG, and imaging tests, along with a prior determination of functional constipation or IBS-C, and need a deterministic Rome IV F3 criterion check. Prefer this over manual Rome IV lookup when integrating into a clinical documentation or decision-support pipeline that already encodes anorectal test results as booleans.
Side effects
- Missing any of the six required boolean query parameters returns a validation error
- Non-boolean values for flag parameters cause a schema rejection
- Network or payment errors (402 if payment not provided) prevent the call from completing
- Caller miscoding test results (e.g. inverting a result) will yield a logically valid but clinically incorrect output
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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