Which of the following measures are useful indicators in assessing the adequacy of a patient's oxygenation?
1) PaO₂-PaO₂
2) PaO₂-to-FiO₂ ratio
3) V_D/V_T
4) Pulmonary shunt

Question

Quizplus · Accepted Answer

1) PaO₂-PaO₂ is a measure of the difference between the partial pressure of oxygen in arterial blood and the partial pressure of oxygen in alveolar gas. This difference is normally around 10 mmHg. A decrease in PaO₂-PaO₂ may indicate inadequate oxygenation.2) PaO₂-to-FiO₂ ratio is a measure of the ratio of the partial pressure of oxygen in arterial blood to the fraction of inspired oxygen. This ratio is normally around 400. A decrease in the PaO₂-to-FiO₂ ratio may indicate inadequate oxygenation.

Which of the Following Measures Are Useful Indicators in Assessing