{"uid":"cap_YIwMQIFhshDMwVjb4EJiC","slug":"fincke-2004-cardiac-power-output-cpo-calculator-d2d9253e","name":"Fincke 2004 Cardiac Power Output (CPO) Calculator","description":"Fincke 2004 cardiac power output from MAP (mm Hg) and cardiac output (L/min): CPO = MAP × CO / 451. Returns cpo_watts to two decimals and the paper ROC band (<=0.53 or >0.53) from the unrounded value. Equality at 0.53 W is <=0.53. MAP is caller-supplied (Fincke used diastolic + (systolic−diastolic)/3); this tool does not take SBP/DBP or compute cardiac power index. Not a medical device, shock diagnosis, or treatment target.","url":"https://api.magentlab.com/api/calc/cpo","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":["map_mm_hg","cardiac_output_l_min"],"properties":{"map_mm_hg":{"type":"number","description":"Mean arterial pressure in mm Hg (30-180). Fincke 2004 used diastolic + (systolic−diastolic)/3. Callers may send MAP from /api/calc/map; this tool does not take SBP or DBP."},"cardiac_output_l_min":{"type":"number","description":"Cardiac output in L/min (0.5-20). Not indexed to body surface area."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"path":"/api/calc/cpo","count":2,"items":[{"band":">0.53","formula":"cpo","citation":{"id":"fincke-2004","doi":"10.1016/j.jacc.2004.03.060","pmid":"15261929","title":"Cardiac power is the strongest hemodynamic correlate of mortality in cardiogenic shock: a report from the SHOCK trial registry","source":"J Am Coll Cardiol. 2004;44(2):340-348","authors":"Fincke R, Hochman JS, Lowe AM, et al."},"cpo_watts":1,"map_mm_hg":90,"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":"cpo_watts = map_mm_hg * cardiac_output_l_min / 451","cardiac_output_l_min":5},{"band":">0.53","formula":"cpo","citation":{"id":"fincke-2004","doi":"10.1016/j.jacc.2004.03.060","pmid":"15261929","title":"Cardiac power is the strongest hemodynamic correlate of mortality in cardiogenic shock: a report from the SHOCK trial registry","source":"J Am Coll Cardiol. 2004;44(2):340-348","authors":"Fincke R, Hochman JS, Lowe AM, et al."},"cpo_watts":1,"map_mm_hg":90,"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":"cpo_watts = map_mm_hg * cardiac_output_l_min / 451","cardiac_output_l_min":5}]}},"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_ynAuUE_dozaiyY9pCNPiN","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":"Calculates cardiac power output in watts using the Fincke 2004 formula (CPO = MAP × CO / 451) and returns the result with ROC-based risk band classification.","exampleAgentPrompt":"Calculate cardiac power output using the Fincke 2004 formula for a patient with a mean arterial pressure of 75 mm Hg and a cardiac output of 4.2 L/min, and tell me which ROC risk band they fall into.","exampleUseCases":[{"title":"ICU hemodynamic risk stratification","prompt":"My ICU patient has a MAP of 65 mm Hg and a cardiac output of 3.1 L/min — can you compute their cardiac power output using the Fincke 2004 formula and tell me if they're above or below the 0.53-watt threshold?"},{"title":"Cardiology consult documentation","prompt":"For a consult note, I need the Fincke 2004 CPO value for a patient with MAP of 88 mm Hg and cardiac output of 5.8 L/min — give me the watts to two decimal places and the ROC band."},{"title":"Automated hemodynamic monitoring pipeline","prompt":"Every hour I'm pulling MAP and cardiac output from the EMR — can you run the Fincke CPO calculation for MAP 72 mm Hg and CO 3.9 L/min and flag if CPO is in the low-risk or high-risk band?"}],"resultDescription":"Returns cpo_watts (a number rounded to two decimal places representing cardiac power output in watts) and the Fincke 2004 ROC band classification — either '<=0.53' or '>0.53' — derived from the unrounded CPO value. Values exactly equal to 0.53 W are classified as <=0.53.","failureModes":["map_mm_hg outside 30–180 range returns a validation error","cardiac_output_l_min outside 0.5–20 range returns a validation error","missing required query parameters returns a 400-level error","payment not included or insufficient USDC results in x402 payment required response"],"whenToPreferThis":"Choose this endpoint when you need to apply the exact Fincke 2004 CPO formula (MAP × CO / 451) and receive the published ROC-based risk band classification. Prefer this over manual calculation when precision to two decimal places and correct boundary handling (<=0.53 equality case) are required. Use it when MAP has already been computed externally (e.g. from /api/calc/map) since this endpoint does not accept SBP/DBP inputs. Not suitable for computing cardiac power index (body surface area-indexed values) or for diagnostic or treatment decisions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:13:46.598Z","isFirstParty":false}