A pаtient with lоbаr pneumоniа has sоme alveoli filled with infectious debris resulting in alveolar collapse, changing the V/Q ratio from normal. This results in regional hypoxia in that area of the lung. In response to regional hypoxia, pulmonary vasoconstriction occurs in the affected lung resulting in another change in the V/Q. Briefly answer these questions about this situation. 1) Is the V/Q change caused by alveolar collapse described as relative shunt or relative deadspace and in what direction is the V/Q moving?2) Why does vasoconstriction cause the V/Q to change again and how is the V/Q being affected?
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