Latest / WhiteBoard Medicine - Emergency And Critical Care
#300 V/Q Mismatch vs Pulmonary Shunt Explained: Key Differences in Hypoxemia
V/Q mismatch and pulmonary shunt are two major physiologic mechanisms of hypoxemia, but they affect oxygenation in different ways. In this episode, we compare ventilation-perfusion mismatch with pulmonary shunt physiology, focusing on how each develops, how they differ clinically, and why their response to supplemental oxygen is different. Topics covered include: • What V/Q mismatch means • What pulmonary shunt means • Ventilation and perfusion basics • Low V/Q physiology • High V/Q physiology • True shunt physiology • How V/Q mismatch causes hypoxemia • How pulmonary shunt causes hypoxemia •…
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