{"uid":"cap_uvxBoPldVNWrpWMmi8nj3","slug":"duke-criteria-calculator-durack-1994-infective-endocarditis-8318ad24","name":"Duke Criteria Calculator (Durack 1994) — Infective Endocarditis","description":"Durack 1994 original Duke criteria for infective endocarditis. Definite if pathologic_definite or clinical_definite (2 major, or 1 major plus 3 minor, or 5 minor); else rejected if any rejected flag; else possible. Suggestive echo and suggestive micro are not double-counted with the matching major. Caller assigns flags. magent does not examine the patient, read an echocardiogram, or interpret cultures. Not Li 2000 modified Duke. Not ISCVID 2023. Not a diagnosis.","url":"https://api.magentlab.com/api/calc/duke","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":["pathologic_definite","major_typical_blood_culture","major_positive_echo","minor_predisposition","minor_fever","minor_vascular_phenomena","minor_immunologic_phenomena","minor_suggestive_echo","minor_suggestive_micro","rejected_firm_alternate_diagnosis","rejected_resolved_le_4_days_antibiotics","rejected_no_pathology_le_4_days_antibiotics"],"properties":{"minor_fever":{"type":"boolean","description":"Fever ≥38.0 C (Durack 1994 minor). true or false as assigned by the caller. magent does not measure temperature."},"major_positive_echo":{"type":"boolean","description":"Positive echocardiogram for IE: oscillating mass or vegetation, abscess, new partial dehiscence of a prosthetic valve, or new valvular regurgitation (Durack 1994 major). true or false as assigned by the caller. magent does not read an echocardiogram."},"pathologic_definite":{"type":"boolean","description":"Microorganisms demonstrated by culture or histology in a vegetation, embolus, or intracardiac abscess, or pathologic lesions (vegetation or abscess) confirmed by histology showing active endocarditis (Durack 1994 pathologic definite). true or false as assigned by the caller. magent does not examine tissue."},"minor_predisposition":{"type":"boolean","description":"Predisposing heart condition or intravenous drug use (Durack 1994 minor). true or false as assigned by the caller. magent does not take a history."},"minor_suggestive_echo":{"type":"boolean","description":"Echocardiogram consistent with IE but not meeting the major echo definition (Durack 1994 minor). true or false as assigned by the caller. Not counted in minor_count when major_positive_echo is true. magent does not read an echocardiogram."},"minor_suggestive_micro":{"type":"boolean","description":"Microbiologic evidence not meeting the major culture definition (Durack 1994 minor). true or false as assigned by the caller. Not counted in minor_count when major_typical_blood_culture is true. magent does not interpret cultures."},"minor_vascular_phenomena":{"type":"boolean","description":"Vascular phenomena (Durack 1994 minor): major arterial emboli, septic pulmonary infarcts, mycotic aneurysm, intracranial hemorrhage, conjunctival hemorrhages, or Janeway lesions, as assigned by the caller. magent does not examine the patient."},"major_typical_blood_culture":{"type":"boolean","description":"Typical microorganism from two separate blood cultures, or persistently positive blood cultures, as assigned by the caller (Durack 1994 major typical blood culture). true or false. magent does not interpret cultures."},"minor_immunologic_phenomena":{"type":"boolean","description":"Immunologic phenomena (Durack 1994 minor): glomerulonephritis, Osler nodes, Roth spots, or rheumatoid factor, as assigned by the caller. magent does not examine the patient."},"rejected_firm_alternate_diagnosis":{"type":"boolean","description":"Firm alternate diagnosis explaining evidence of IE (Durack 1994 rejected). true or false as assigned by the caller. Classification is rejected only when definite does not hold."},"rejected_resolved_le_4_days_antibiotics":{"type":"boolean","description":"Manifestations of IE resolved with antibiotic therapy for 4 days or less (Durack 1994 rejected). true or false as assigned by the caller."},"rejected_no_pathology_le_4_days_antibiotics":{"type":"boolean","description":"No pathologic evidence of IE at surgery or autopsy after antibiotic therapy for 4 days or less (Durack 1994 rejected). true or false as assigned by the caller. magent does not examine tissue."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"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_MS5kgSuT0hDWVyI0hc8S5","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 original Durack 1994 Duke criteria classification (Definite, Possible, or Rejected) for infective endocarditis from caller-supplied boolean flags for pathologic, major, and minor criteria.","exampleAgentPrompt":"Apply the original Durack 1994 Duke criteria for this endocarditis workup: pathologic_definite is false, major_typical_blood_culture is true, major_positive_echo is true, minor_predisposition is true, minor_fever is true, minor_vascular_phenomena is false, minor_immunologic_phenomena is false, minor_suggestive_echo is false, minor_suggestive_micro is false, rejected_firm_alternate_diagnosis is false, rejected_resolved_le_4_days_antibiotics is false, rejected_no_pathology_le_4_days_antibiotics is false — is this patient Definite, Possible, or Rejected?","exampleUseCases":[{"title":"Definite IE classification for ICU patient","prompt":"I have an ICU patient with two positive blood cultures for a typical IE organism and an echo showing a vegetation — pathologic_definite false, major_typical_blood_culture true, major_positive_echo true, all minor flags false, all rejection flags false. Run the original Durack 1994 Duke criteria and tell me if this is Definite IE."},{"title":"Rejected IE workup after short antibiotic course","prompt":"For this patient: pathologic_definite false, both major flags false, minor_predisposition true, minor_fever true, minor_vascular_phenomena false, minor_immunologic_phenomena false, minor_suggestive_echo false, minor_suggestive_micro false, rejected_firm_alternate_diagnosis false, rejected_resolved_le_4_days_antibiotics true, rejected_no_pathology_le_4_days_antibiotics false — apply the 1994 Duke criteria and tell me if the diagnosis is rejected."},{"title":"Possible IE classification with mixed minor criteria","prompt":"Patient has a predisposing heart condition, fever above 38°C, and vascular phenomena but no major criteria met and no rejection criteria — pathologic_definite false, major_typical_blood_culture false, major_positive_echo false, minor_predisposition true, minor_fever true, minor_vascular_phenomena true, minor_immunologic_phenomena false, minor_suggestive_echo false, minor_suggestive_micro false, all rejection flags false. What does the original Durack 1994 Duke classification say?"}],"resultDescription":"Returns a Duke criteria classification of Definite (pathologic or clinical), Possible, or Rejected, along with the specific rule path used (e.g. 2 major criteria met, or 1 major + 3 minor, or 5 minor for clinical definite). Clarifies that suggestive echo and suggestive micro minor criteria are not double-counted against matching major criteria. Does not provide a diagnosis.","failureModes":["Missing required boolean query parameters returns a validation error","Passing non-boolean values for flag parameters causes a schema rejection","Network or payment failure (402 x402 payment required if USDC not provided)","All flags false returns a valid Possible or Rejected result but may indicate misconfigured input"],"whenToPreferThis":"Use this endpoint when you need a precise, rule-faithful implementation of the original Durack 1994 Duke criteria — not the Li 2000 modified Duke criteria and not the ISCVID 2023 criteria. Ideal when a clinical decision support pipeline has already interpreted clinical findings into boolean flags and needs a stateless, deterministic classification without LLM hallucination risk. Choose this over a general medical AI if you need reproducible, auditable scoring logic with explicit handling of the no-double-counting rule for suggestive echo and micro.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:08:36.496Z","isFirstParty":false}