What is the normal PaO2 range in arterial blood?

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Prepare for the AACN Essentials of Critical Care Nursing Test. Study with multiple choice questions and thorough explanations. Ace your test effortlessly!

Multiple Choice

What is the normal PaO2 range in arterial blood?

Explanation:
PaO2 measures the amount of oxygen dissolved in arterial blood and reflects how well oxygen moves from the lungs into the blood. In a healthy person at sea level, the normal range is about 75–100 mmHg. This level indicates adequate oxygenation; values below this suggest hypoxemia, with more critical levels typically defined around 60 mmHg or lower. The figure 90–110 mmHg is higher than the usual resting baseline and is not considered a typical reference range. Remember, PaO2 is about dissolved oxygen, while SpO2SaO2 describe how saturated hemoglobin is with oxygen. A PaO2 in the 80s generally corresponds to a normal SpO2 of roughly 95–100%.

PaO2 measures the amount of oxygen dissolved in arterial blood and reflects how well oxygen moves from the lungs into the blood. In a healthy person at sea level, the normal range is about 75–100 mmHg. This level indicates adequate oxygenation; values below this suggest hypoxemia, with more critical levels typically defined around 60 mmHg or lower. The figure 90–110 mmHg is higher than the usual resting baseline and is not considered a typical reference range. Remember, PaO2 is about dissolved oxygen, while SpO2SaO2 describe how saturated hemoglobin is with oxygen. A PaO2 in the 80s generally corresponds to a normal SpO2 of roughly 95–100%.

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