{"slug":"api-magentlab-com-api-calc-ohfrs-bf7f20","title":"Ottawa Heart Failure Risk Scale (OHFRS; Stiell 2013 derivation)","host":"api.magentlab.com","method":"POST","resource":"https://api.magentlab.com/api/calc/ohfrs","category":"other","description":"Ottawa Heart Failure Risk Scale (OHFRS; Stiell 2013 derivation). Ten caller-assigned flags (stroke/TIA 1, intubation 2, arrival HR >=110 2, arrival SaO2 <90% 1, walk-test HR >=110 or unable 1, new ischemic ECG 2, urea >=12 mmol/L 1, CO2 >=35 mmol/L 2, troponin at MI level 2, NT-proBNP >=5000 ng/L 1)","price_listed":0.005,"price_asked":0.007,"state":"overcharges","state_label":"Asked 1.4x its listed price for its own example","checks_7d":1,"answered_7d":1,"latency_ms_median":467,"reported_calls_30d":0,"reported_payers_30d":0,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"items":[{"co2_ge_35_mmol_l":false,"history_stroke_or_tia":false,"hr_arrival_ge_110":false,"intubation_respiratory_distress":false,"new_ischemic_ecg":false,"ntprobnp_ge_5000":false,"sao2_lt_90_arrival":false,"troponin_mi_level":false,"urea_ge_12_mmol_l":false,"walk_test_hr_ge_110_or_unable":false},{"co2_ge_35_mmol_l":false,"history_stroke_or_tia":false,"hr_arrival_ge_110":false,"intubation_respiratory_distress":false,"new_ischemic_ecg":false,"ntprobnp_ge_5000":false,"sao2_lt_90_arrival":false,"troponin_mi_level":false,"urea_ge_12_mmol_l":false,"walk_test_hr_ge_110_or_unable":false}]},"method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"additionalProperties":false,"properties":{"items":{"items":{"properties":{"co2_ge_35_mmol_l":{"description":"Serum CO2 >=35 mmol/L as assigned by the caller after applying the Stiell 2013 cutoff (2 points if true). true or false. magent does not assay CO2.","type":"boolean"},"history_stroke_or_tia":{"description":"History of stroke or TIA as assigned by the caller (Stiell 2013; 1 point if true). true or false. magent does not take the history.","type":"boolean"},"hr_arrival_ge_110":{"description":"Heart rate on ED arrival >=110 as assigned by the caller after applying the Stiell 2013 cutoff (2 points if true). true or false. magent does not measure heart rate.","type":"boolean"},"intubation_respiratory_distress":{"description":"Intubation for respiratory distress as assigned by the caller (Stiell 2013; 2 points if true). true or false.","type":"boolean"},"new_ischemic_ecg":{"description":"New ischemic ECG changes as assigned by the caller (Stiell 2013 derivation; 2 points if true). true or false. magent does not interpret the ECG.","type":"boolean"},"ntprobnp_ge_5000":{"description":"NT-proBNP >=5000 ng/L as assigned by the caller after applying the Stiell 2013 cutoff (1 point if true). true or false. magent does not assay NT-proBNP.","type":"boolean"},"sao2_lt_90_arrival":{"description":"Oxygen saturation <90% on ED arrival as assigned by the caller after applying the Stiell 2013 cutoff (1 point if true). true or false. magent does not measure saturation.","type":"boolean"},"troponin_mi_level":{"description":"Troponin I or T elevated to MI level as assigned by the caller (Stiell 2013; 2 points if true). true or false. magent does not assay troponin.","type":"boolean"},"urea_ge_12_mmol_l":{"description":"Urea >=12 mmol/L as assigned by the caller after applying the Stiell 2013 cutoff (1 point if true). true or false. magent does not assay urea.","type":"boolean"},"walk_test_hr_ge_110_or_unable":{"description":"Heart rate >=110 during the 3-minute walk test, or unable to perform the walk test, as assigned by the caller after ED intervention (Stiell 2013; 1 point if true). true or false. magent does not walk the patient.","type":"boolean"}},"required":["history_stroke_or_tia","intubation_respiratory_distress","hr_arrival_ge_110","sao2_lt_90_arrival","walk_test_hr_ge_110_or_unable","new_ischemic_ecg","urea_ge_12_mmol_l","co2_ge_35_mmol_l","troponin_mi_level","ntprobnp_ge_5000"],"type":"object"},"maxItems":25,"minItems":1,"type":"array"}},"required":["items"],"type":"object"},"headers":{"additionalProperties":{"type":"string"},"type":"object"},"method":{"const":"POST","type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-28","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.007,"price_match":false,"latency_ms":467,"error":null}],"description_full":"Ottawa Heart Failure Risk Scale (OHFRS; Stiell 2013 derivation). Ten caller-assigned flags (stroke/TIA 1, intubation 2, arrival HR >=110 2, arrival SaO2 <90% 1, walk-test HR >=110 or unable 1, new ischemic ECG 2, urea >=12 mmol/L 1, CO2 >=35 mmol/L 2, troponin at MI level 2, NT-proBNP >=5000 ng/L 1); integer points, max 15. Derivation SAE risk 2.8% to 89.0%. Not a medical device, not a disposition or discharge order, not EHMRG. magent does not walk the patient or read the ECG.","last_updated":"2026-09-28T14:47:54.478Z","schemes":["exact"]}