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Gross Allowable Blood Loss Calculator (Dilution-Corrected)
x402
Gross Allowable Blood Loss Calculator (Dilution-Corrected) 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 Gross 1983 dilution-corrected allowable blood loss given caller-supplied estimated blood volume and initial versus target hematocrit values.
Price / call$0.005
Success—
StatusUnknown
How this service works
Gross 1983 dilution-corrected allowable blood loss from caller-supplied estimated blood volume and initial versus target hematocrit. Deterministic published arithmetic with citation. Not a transfusion trigger or order. Does not compute Nadler EBV; does not use the uncorrected EBV*(Hi-Hf)/Hi form.
Output
Returns the dilution-corrected allowable blood loss in mL computed using the Gross 1983 formula, along with a citation to the source publication. Does not include a Nadler EBV computation or use the uncorrected EBV*(Hi-Hf)/Hi form.
Example use cases
Preoperative anesthesia planning
“My patient going into a major spinal surgery has an estimated blood volume of 5200 mL, a starting hematocrit of 38%, and we want to keep them above 21% — what is the maximum allowable blood loss before we'd need to transfuse?”
Pediatric surgical blood loss threshold
“For a pediatric patient with an estimated blood volume of 800 mL, initial hematocrit of 36%, and a target hematocrit of 28%, use the Gross dilution-corrected formula to tell me the allowable blood loss in mL.”
Intraoperative transfusion trigger review
“We have an adult patient with EBV of 3800 mL, hematocrit currently at 40%, and the clinical team wants to avoid dropping below 30% — what does the Gross 1983 formula give for the allowable blood loss?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/allowable_blood_lossWhen to prefer
Use this endpoint when you need a deterministic, citation-backed Gross 1983 dilution-corrected allowable blood loss calculation and you already have a caller-supplied estimated blood volume (the endpoint does not compute Nadler EBV). Prefer this over manual calculation or general-purpose LLM math when auditability, formula fidelity, and a published citation are required. Do not use this as a transfusion trigger or clinical order.
Side effects
- hct_target_percent >= hct_initial_percent — target must be strictly less than initial
- estimated_blood_volume_ml outside 50–15000 mL range returns validation error
- hct_initial_percent or hct_target_percent outside 10–70% range returns validation error
- Missing required query parameters returns 400 error
- Payment not provided or insufficient USDC returns 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/allowable_blood_loss",
"count": 2,
"items": [
{
"abl_ml": 1428.6,
"formula": "gross_1983",
"citation": {
"id": "gross-1983",
"doi": "10.1097/00000542-198303000-00016",
"title": "Estimating allowable blood loss: corrected for dilution",
"source": "Anesthesiology. 1983;58(3):277-280",
"authors": "Gross JB"
},
"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.",
"formula_expression": "abl_ml = estimated_blood_volume_ml * (hct_initial_percent - hct_target_percent) / ((hct_initial_percent + hct_target_percent) / 2)",
"hct_target_percent": 30,
"hct_initial_percent": 40,
"estimated_blood_volume_ml": 5000
},
{
"abl_ml": 1428.6,
"formula": "gross_1983",
"citation": {
"id": "gross-1983",
"doi": "10.1097/00000542-198303000-00016",
"title": "Estimating allowable blood loss: corrected for dilution",
"source": "Anesthesiology. 1983;58(3):277-280",
"authors": "Gross JB"
},
"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.",
"formula_expression": "abl_ml = estimated_blood_volume_ml * (hct_initial_percent - hct_target_percent) / ((hct_initial_percent + hct_target_percent) / 2)",
"hct_target_percent": 30,
"hct_initial_percent": 40,
"estimated_blood_volume_ml": 5000
}
]
}
}Tags
x402
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