Definition and classification 1. Definition Failure of gas exchange due to inadequate function of respiratory system 2. Classification Hypoxemia: lung edema, low FIO2, lung fibrosis Hypercarbia: excess of CO2 production Combination of hypoxemia and hypercarbia: COPD Type L, Il, Ill, IV respiratory failureDefinition and classification 1. Definition: Failure of gas exchange due to inadequate function of respiratory system 2. Classification Hypoxemia: lung edema, low FIO2, lung fibrosis Hypercarbia: excess of CO2 production Combination of hypoxemia and hypercarbia: COPD Type I, II, III, IV respiratory failure