# Gross Allowable Blood Loss Calculator (Dilution-Corrected) > 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. ## Facts - Endpoint: GET https://api.magentlab.com/api/calc/allowable_blood_loss - Price: $0.005/call - Payment: x402 - Status: unknown - Last checked: 2026-09-15 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/gross-allowable-blood-loss-calculator-dilution-corrected-d246318a - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ea5qIaFST5GQcBVqzEcZH Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability gross-allowable-blood-loss-calculator-dilution-corrected-d246318a ``` Example prompt: Calculate the dilution-corrected allowable blood loss for a patient with an estimated blood volume of 4500 mL, an initial hematocrit of 42%, and a target hematocrit of 24%. ## When to prefer this 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. ## Known failure modes - 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 ## 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. ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method" ], "properties": { "type": { "type": "string", "const": "http" }, "method": { "enum": [ "GET", "HEAD", "DELETE" ], "type": "string" }, "headers": { "type": "object", "additionalProperties": { "type": "string" } }, "queryParams": { "type": "object", "required": [ "estimated_blood_volume_ml", "hct_initial_percent", "hct_target_percent" ], "properties": { "hct_target_percent": { "type": "number", "description": "Target hematocrit as a percent (10-70). Must be strictly less than hct_initial_percent." }, "hct_initial_percent": { "type": "number", "description": "Initial hematocrit as a percent (10-70)." }, "estimated_blood_volume_ml": { "type": "number", "description": "Caller-supplied estimated blood volume in mL (50-15000). Required. magent does not compute Nadler EBV." } } } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object" } } } } } ``` ## Response schema (JSON Schema) ```json { "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 } ] } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gross-allowable-blood-loss-calculator-dilution-corrected-d246318a/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from api.magentlab.com](https://www.zero.xyz/host/api.magentlab.com/llms.txt)