Which of the following indicate severely impaired oxygenation requiring high FiO₂s and positive end expiratory pressure?
1) PaO₂-PaO₂ greater than 350 mm Hg on 100% O₂
2) VC less than 10 ml/kg
3) PaO₂/FiO₂ less than 200
4) PaCO₂ greater than 45 mm Hg

Question

Quizplus · Accepted Answer

Option 1 indicates severe hypoxemia with the requirement for high FiO₂s, but the value given for PaO₂-PaO₂ is not physiologically possible. Option 2 indicates severe lung dysfunction with low lung volumes. Option 3 indicates severe hypoxemia with PaO₂/FiO₂ ratio less than 200. Option 4 indicates severe hypercapnia. Therefore, options 1 and 4 are incorrect, and options 2 and 3 are the correct choices for severely impaired oxygenation requiring high FiO₂s and positive end-expiratory pressure.

Which of the Following Indicate Severely Impaired Oxygenation Requiring High