What effect would upper airway obstruction have on ventilation-perfusion ratio,PaO₂ and PACO₂?
A) The V/Q ratio and PAO₂ will decrease and PACO₂ will increase
B) The V/Q ratio and PACO₂ will decrease and PaO₂ will increase
C) The V/Q ratio and PACO₂ will increase and PAO₂ will decrease
D) The V/Q ratio and PAO₂ will increase and PACO₂ will decrease

Question

Quizplus · Accepted Answer

Upper airway obstruction can lead to a decrease in air flow into the alveoli, resulting in a decrease in V/Q ratio. The decrease in ventilation will cause a buildup of CO₂ in the blood, resulting in an increase in PACO₂. Additionally, the decrease in oxygenation due to the obstruction will result in a decrease in PAO₂.

What Effect Would Upper Airway Obstruction Have on Ventilation-Perfusion Ratio,PaO₂