Definition Etiology Causes of Hypoxia Inadequate Oxygen Delivery: inadequate minute ventilation or FiO2; mechanical failure, disconnect R-L Shunt: intracardiac shunting V/Q Mismatch: mainstem, pulmonary edema, aspiration, atelectasis, pulmonary embolus Impaired Diffusion: pulmonary edema, pneumonia Note that despite the separate classifications above, most cardiopulmonary pathology contributes to hypoxemia via multiple mechanisms (ex. emphysema causes hypoventilation, diffusion […]