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Kaplan 1990 Estimated Plasma Volume for Therapeutic Plasma Exchange
x402
Kaplan 1990 Estimated Plasma Volume for Therapeutic Plasma Exchange 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 estimated plasma volume (EPV) in liters and milliliters using the Kaplan 1990 formula for therapeutic plasma exchange planning.
Price / call$0.005
Success—
StatusUnknown
How this service works
Kaplan 1990 estimated plasma volume for therapeutic plasma exchange: epv_l = 0.065 * weight_kg * (1 - hematocrit_percent/100). Returns one plasma volume in liters and milliliters. Hematocrit is a percent (10-70), not a 0-1 fraction. Deterministic published arithmetic with citation. Not an apheresis order, Nadler blood volume, Ganzoni iron deficit, or a 1.5-PV / removal-percent table.
Output
Returns the estimated plasma volume (EPV) calculated as 0.065 × weight_kg × (1 − hematocrit_percent/100), expressed in both liters and milliliters, with citation to Kaplan 1990.
Example use cases
Pre-procedure TPE volume planning
“My patient weighs 165 pounds and has a hematocrit of 42% — can you calculate their estimated plasma volume in liters using the Kaplan 1990 method before we start therapeutic plasma exchange?”
Hematologist double-checking EPV math
“I need to verify the plasma volume for a 55 kg patient with a hematocrit of 35% using the Kaplan formula — what does the EPV come out to in liters and milliliters?”
Apheresis nurse quick bedside check
“Before this TPE session, can you quickly compute the one-plasma-volume estimate for an 88 kg patient whose hematocrit is 30%?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/tpeWhen to prefer
Use this endpoint when you need the Kaplan 1990 formula specifically for one estimated plasma volume in therapeutic plasma exchange planning, given patient weight and hematocrit. Prefer this over general blood volume calculators (e.g., Nadler) when the clinical need is TPE procedure dosing rather than total blood volume estimation, iron deficit (Ganzoni), or platelet-replacement tables.
Side effects
- Missing hematocrit_percent returns a validation error (it is required)
- Hematocrit value outside the accepted range of 10–70 percent returns an error
- Neither weight_kg nor weight_lb provided causes a missing parameter error
- Non-numeric inputs for weight or hematocrit cause a type validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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