Latest / WhiteBoard Medicine - Emergency And Critical Care
#299 Pulmonary Shunt Physiology Explained: Hypoxemia, V/Q Mismatch, and Oxygen Response
Pulmonary shunt is an important physiologic mechanism of hypoxemia and respiratory failure. In this episode, we review what a pulmonary shunt is, how shunt physiology affects oxygenation, how it differs from V/Q mismatch and dead space ventilation, and why shunt physiology often responds poorly to supplemental oxygen. Topics covered include: • What pulmonary shunt means • Normal ventilation and perfusion relationships • Right-to-left shunt physiology • Intrapulmonary versus intracardiac shunt • How pulmonary shunt causes hypoxemia • Why shunt responds poorly to supplemental oxygen •…
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