Causes of Hypoxemia- Differential Diagnosis Algorithm Ventilation/perfusion Mismatch • Airway Disease (Asthma, COPD) • Vascular (PE*) • Parenchymal Disease Diffusion Limitation • Interstitial lung disease • Pulmonary Arterial Hypertension Intracardiac Right to Left Shunt • Ventricular Septal Defect ** • Atrial Septal Defect Pulmonary Right to Left Shunt • Arteriovenous Malformation • Severe Pneumonia • Atelectasis Central Hypoventilation • Drugs* • Coma • Hypothyroidism Peripheral Hypoventilation • Obesity Hypoventilation Syndrome • Neuromascular Weakness • Pleural Abnormalities • Chest Wall Abnormalities #Hypoxemia #Hypoxia #Differential #Diagnosis #Algorithm #Causes #Pulmonary
