Advanced Patient Assessment Practice Exam

What is the normal value of PaO2 in the adult patient?

1. 60 - 70 mm Hg

2. 50 - 60 mm Hg

3. 80 - 100 mm Hg

4. 70 - 80 mm Hg

The correct answer is: 80 - 100 mm Hg

The normal value for arterial oxygen partial pressure (PaO2) in an adult patient typically ranges from 80 to 100 mm Hg. This range indicates adequate oxygenation of the blood, which is crucial for ensuring that tissues throughout the body receive enough oxygen for metabolism and function. Maintaining PaO2 levels within this normal range is vital for physiological processes and can reflect the efficiency of the respiratory system in delivering oxygen to the bloodstream. Levels below this range may suggest hypoxemia, which can be caused by various conditions such as respiratory diseases or issues with ventilation. Conversely, levels above the normative range often indicate hyperoxia, which can also be detrimental. Other ranges provided in the choices do not represent the normal physiological values for PaO2 in adults. These other options fall outside the expected range, indicating either mild to significant hypoxemia or conditions that typically do not align with optimal respiratory health.