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Magent Oxygenation Index Calculator
x402
Magent Oxygenation Index 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).
Computes the Oxygenation Index (OI) from FiO2, mean airway pressure, and PaO2 using the standard deterministic formula: FiO2 × MAP × 100 / PaO2
Price / call$0.005
Success—
StatusUnknown
How this service works
Oxygenation index from FiO2 as a fraction (0.21–1.0), mean airway pressure in cm H2O, and PaO2: FiO2 × MAP × 100 / PaO2. Deterministic published arithmetic with citation; not a diagnosis or an ECMO-initiation protocol.
Output
Returns the computed Oxygenation Index (OI) as a numeric value derived from the formula FiO2 × MAP × 100 / PaO2, along with the published citation for the formula. The response is purely arithmetic — no clinical diagnosis or treatment recommendation is included.
Example use cases
ICU respiratory failure severity triage
“My ICU patient is on FiO2 0.80, mean airway pressure 24 cm H2O, and their PaO2 is 55 mmHg — what's their oxygenation index?”
Neonatal ECMO threshold screening
“Can you compute the oxygenation index for a neonate with FiO2 1.0, MAP of 18 cm H2O, and PaO2 of 40 mmHg? I need to know how close we are to typical ECMO thresholds.”
Trending OI over time in ARDS
“Calculate the oxygenation index now versus earlier: current values are FiO2 0.50, MAP 16 cm H2O, PaO2 80 mmHg — I want to track whether this ARDS patient is improving.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/oxygenation_indexWhen to prefer
Use this endpoint when you need a fast, deterministic, citation-backed Oxygenation Index calculation with defined input ranges and clear formula provenance, particularly in clinical decision-support workflows for ventilated or critically ill patients. Prefer it over manual computation or general-purpose math tools when auditability of the formula source matters or when integrating into a larger ICU monitoring pipeline.
Side effects
- FiO2 provided as a percentage (e.g. 60) instead of a fraction (0.60) — result will be 100× too high
- PaO2 or MAP out of accepted range (PaO2 20–700 mmHg, MAP 4–45 cm H2O) — validation error returned
- Missing required query parameter (fio2, mean_airway_pressure_cm_h2o, or pao2_mm_hg) — HTTP 400 or schema error
- Non-numeric values passed for numeric fields — parsing error
- Confusing mean airway pressure (ventilator) with mean arterial blood pressure — produces a clinically meaningless result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/oxygenation_index",
"count": 2,
"items": [
{
"fio2": 0.5,
"formula": "oxygenation_index",
"citation": {
"id": "ortiz-bartlett-1987",
"doi": "10.1016/S0031-3955(16)36180-7",
"title": "Extracorporeal membrane oxygenation in pediatric respiratory failure",
"source": "Pediatr Clin North Am. 1987;34(1):39-46",
"authors": "Ortiz RM, Cilley RE, Bartlett RH"
},
"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.",
"pao2_mm_hg": 80,
"oxygenation_index": 7.5,
"formula_expression": "oxygenation_index = fio2 * mean_airway_pressure_cm_h2o * 100 / pao2_mm_hg",
"mean_airway_pressure_cm_h2o": 12
},
{
"fio2": 0.5,
"formula": "oxygenation_index",
"citation": {
"id": "ortiz-bartlett-1987",
"doi": "10.1016/S0031-3955(16)36180-7",
"title": "Extracorporeal membrane oxygenation in pediatric respiratory failure",
"source": "Pediatr Clin North Am. 1987;34(1):39-46",
"authors": "Ortiz RM, Cilley RE, Bartlett RH"
},
"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.",
"pao2_mm_hg": 80,
"oxygenation_index": 7.5,
"formula_expression": "oxygenation_index = fio2 * mean_airway_pressure_cm_h2o * 100 / pao2_mm_hg",
"mean_airway_pressure_cm_h2o": 12
}
]
}
}Tags
x402
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