Ottawa COPD Risk Scale calculator

Ottawa COPD Risk Scale: 0 — Low risk (score 0; ~2.2% serious adverse events). Interpretation: Low risk (score 0; ~2.2% serious adverse events) What to do: Interpret only within the cited source population and criteria; use alongside complete clinical assessment. Inputs: History of coronary artery bypass graft surgery (+1): false; History of intervention for peripheral vascular disease (+1): false; History of intubation for respiratory distress (+2): false; Heart rate 110 beats per minute or more on emergency department arrival (+2): false; Acute ischemic changes on ECG (+2): false; Pulmonary congestion on chest x-ray (+1): false; Hemoglobin under 100 grams per liter (+3): false; Urea 12 millimoles per liter or more (+1): false; Serum carbon dioxide 35 millimoles per liter or more (+1): false; Post-treatment oxygen saturation under 90% or heart rate 120 beats per minute or more (+2): false Source: Stiell IG et al. Clinical characteristics associated with adverse events in patients with exacerbation of COPD: a prospective cohort study. CMAJ. DOI: 10.1503/cmaj.130968. PMID: 24549125. Scope: Ottawa COPD Risk Scale sums ten weighted predictors (history of CABG +1, PVD intervention +1, prior intubation for respiratory distress +2, ED-arrival heart rate ≥110/min +2, acute ischemic ECG changes +2, pulmonary congestion on chest x-ray +1, hemoglobin <100 g/L +3, urea ≥12 mmol/L +1, serum CO2 ≥35 mmol/L +1, post-treatment desaturation <90% or heart rate ≥120/min +2; range 0–16) to estimate 30-day risk of serious adverse events after an ED visit for COPD exacerbation. (2014)