Respiratory Physiology & Mechanical Ventilation Principles

Q:1 A 4-year-old with severe pneumonia is intubated. Despite FiO₂ 1.0 and adequate ventilation (PaCO₂ 40 mmHg), PaO₂ remains 55 mmHg. Chest X-ray shows bilateral consolidation. What is the primary mechanism of hypoxemia? A. Alveolar hypoventilationB. Diffusion limitationC. Intrapulmonary shuntD. Increased dead spaceE. Low inspired oxygen fraction Answer: CExplanation:Refractory hypoxemia despite high FiO₂ indicates shunt … Read more