The P/F ratio is calculated by dividing the arterial oxygen tension (PaO₂) by the fraction of inspired oxygen (FiO₂), and multiplying the result by 100. In this case, the P/F ratio is 75.
The P/F ratio, also known as the Oxygenation Index, is a measure of a patient's ability to oxygenate their blood. It is calculated by dividing the arterial oxygen tension (PaO₂) by the fraction of inspired oxygen (FiO₂), and multiplying the result by 100. In this case, the P/F ratio would be calculated as follows:
- PaO₂ = 60 mmHg
- FiO₂ = 0.8
- P/F ratio = (PaO₂ / FiO₂) * 100
- P/F ratio = (60 / 0.8) * 100 = 75
Therefore, the correct answer is C. 75.