{"uid":"cap_ea5qIaFST5GQcBVqzEcZH","slug":"gross-allowable-blood-loss-calculator-dilution-corrected-d246318a","name":"Gross Allowable Blood Loss Calculator (Dilution-Corrected)","description":"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.","url":"https://api.magentlab.com/api/calc/allowable_blood_loss","method":"GET","headers":{},"bodySchema":{"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"}}}}},"responseSchema":{"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}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ifnf0qmHcMVhhY6KXdwbQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the Gross 1983 dilution-corrected allowable blood loss given caller-supplied estimated blood volume and initial versus target hematocrit values.","exampleAgentPrompt":"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%.","exampleUseCases":[{"title":"Preoperative anesthesia planning","prompt":"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?"},{"title":"Pediatric surgical blood loss threshold","prompt":"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."},{"title":"Intraoperative transfusion trigger review","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:18:00.621Z","isFirstParty":false}