What is the normal range for partial pressure of oxygen (PaO2)?

The normal range for partial pressure of oxygen (PaO2) in arterial blood is widely recognized to be between 80 and 100 mmHg. This is important in assessing a person's respiratory function, as it reflects the amount of oxygen dissolved in the blood. Values within this range indicate adequate oxygenation for healthy individuals at sea level and at rest.

The significance of this range is that it helps healthcare providers evaluate how well oxygen is being transported in the body. When PaO2 falls below 80 mmHg, it may signify hypoxemia (low blood oxygen), which could necessitate further evaluation and potential intervention.

Additionally, understanding the normal PaO2 range assists in interpreting arterial blood gas (ABG) test results. Familiarity with these values is crucial in clinical settings, particularly in emergencies where oxygenation status is critical.