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Korabathina 2012 PAPi Calculator
x402
Korabathina 2012 PAPi Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Calculates the Pulmonary Artery Pulsatility Index (PAPi) from PA systolic, PA diastolic, and right atrial pressure, returning the ratio and its ROC band classification
Price / call$0.005
Success—
StatusUnknown
How this service works
Korabathina 2012 pulmonary artery pulsatility index from PA systolic (mm Hg), PA diastolic (mm Hg), and RAP (mm Hg): PAPi = (PAS − PAD) / RAP. Returns papi to two decimals and the paper ROC band (<=0.9 or >0.9) from the unrounded ratio. Equality at 0.9 is <=0.9. RAP 0 is invalid (no RAP=1 substitution). Not a medical device, RV-failure diagnosis, or device threshold.
Output
Returns the PAPi value rounded to two decimal places (calculated as (PA systolic − PA diastolic) / RAP) and the Korabathina 2012 ROC band classification: <=0.9 or >0.9, based on the unrounded ratio. RAP of 0 is rejected as invalid.
Example use cases
Post-LVAD implant hemodynamic review
“I have right heart cath data: PA systolic is 52 mm Hg, PA diastolic is 22 mm Hg, and RAP is 12 mm Hg. Calculate the Korabathina PAPi and tell me if it's above or below the 0.9 ROC cutoff.”
Cardiogenic shock catheterization interpretation
“Can you run the PAPi calculation for PA systolic 38, PA diastolic 18, and right atrial pressure 15 mm Hg? I want the two-decimal result and the ROC band classification.”
Automated hemodynamic report generation
“For each of these cath lab readings, calculate the Korabathina 2012 PAPi: patient A has PA systolic 60, PA diastolic 25, RAP 10; what's the PAPi and band?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/papiWhen to prefer
Use this endpoint when you need a deterministic, formula-faithful implementation of the Korabathina 2012 PAPi calculation with explicit ROC band classification, particularly in automated clinical data pipelines, EHR integrations, or research workflows where reproducibility of the published formula (no RAP=1 substitution, equality at 0.9 maps to <=0.9) is essential. Prefer it over manual calculation to avoid arithmetic errors in critical care or prior-authorization documentation contexts.
Side effects
- RAP value of 0 returns an error (division by zero; no RAP=1 substitution is made)
- PA diastolic >= PA systolic returns an error or nonsensical result
- Values outside valid ranges (PA systolic 10-150, PA diastolic 1-80, RAP 1-40) may be rejected
- Missing required query parameters returns a validation error
- Non-numeric inputs for any parameter cause a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/papi",
"count": 2,
"items": [
{
"band": ">0.9",
"papi": 3,
"formula": "papi",
"citation": {
"id": "korabathina-2012",
"doi": "10.1002/ccd.23309",
"pmid": "21954053",
"title": "The pulmonary artery pulsatility index identifies severe right ventricular dysfunction in acute inferior myocardial infarction.",
"source": "Catheter Cardiovasc Interv. 2012;80(4):593-600",
"authors": "Korabathina R, Heffernan KS, Paruchuri V, et al."
},
"ra_mm_hg": 6,
"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.",
"pa_systolic_mm_hg": 30,
"formula_expression": "papi = (pa_systolic_mm_hg - pa_diastolic_mm_hg) / ra_mm_hg",
"pa_diastolic_mm_hg": 12
},
{
"band": ">0.9",
"papi": 3,
"formula": "papi",
"citation": {
"id": "korabathina-2012",
"doi": "10.1002/ccd.23309",
"pmid": "21954053",
"title": "The pulmonary artery pulsatility index identifies severe right ventricular dysfunction in acute inferior myocardial infarction.",
"source": "Catheter Cardiovasc Interv. 2012;80(4):593-600",
"authors": "Korabathina R, Heffernan KS, Paruchuri V, et al."
},
"ra_mm_hg": 6,
"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.",
"pa_systolic_mm_hg": 30,
"formula_expression": "papi = (pa_systolic_mm_hg - pa_diastolic_mm_hg) / ra_mm_hg",
"pa_diastolic_mm_hg": 12
}
]
}
}Tags
x402
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