What is considered a normal arterial oxygen tension (PaO2) at sea level?

The range of 75 to 100 mmHg is recognized as the normal arterial oxygen tension (PaO2) at sea level. This range signifies the partial pressure of oxygen in arterial blood that is necessary for adequate oxygen delivery to tissues.

At sea level, a PaO2 below this range would indicate hypoxemia, or low oxygen levels, which could lead to significant physiological consequences and may require medical intervention. Conversely, significantly higher values could suggest conditions such as hyperoxia, which can also pose risks, particularly in certain clinical scenarios.

Understanding the normal range of arterial oxygen tension is crucial for healthcare professionals, especially in the context of assessing and managing patients with respiratory or cardiovascular conditions. Maintaining this balance is vital for optimal cellular function and overall health.