Absorption atelectasis can occur rapidly when patients are b…
Absorption atelectasis can occur rapidly when patients are breathing 100% O2. This occurs because the gas pressure gradient between the obstructed alveoli and the mixed venous blood (pulmonary artery) is extremely large, causing rapid oxygen diffusion. In this specific scenario (breathing 100% O2 in an obstructed alveoli), what is the approximate total gas pressure listed for the pulmonary artery?