What is considered an acceptable range for PO2?

The range of 80 - 100 mmHg for partial pressure of oxygen (PO2) is considered the acceptable reference range for healthy adults at sea level. Maintaining PO2 within this range is critical as it indicates adequate oxygenation and reveals how effectively oxygen is being transported in the bloodstream.

A PO2 lower than 80 mmHg can signify hypoxemia, which may require medical attention depending on the patient's overall clinical picture. Conversely, sustained PO2 levels significantly higher than 100 mmHg can lead to oxygen toxicity, particularly in certain therapeutic contexts.

Other options suggest ranges that either fall short of providing adequate oxygenation or exceed the levels typically tolerated without risk of toxicity, highlighting the importance of adhering to the established norm. Thus, the range 80 - 100 mmHg is recognized as an optimal target for assessing oxygen adequacy in clinical practice.