Partial pressure of oxygen (PaO2)

Partial pressure of oxygen (PaO2) measures the amount of oxygen dissolved in the blood's arterial plasma, reflecting how effectively oxygen moves from the lungs into the bloodstream. It’s expressed in millimeters of mercury (mmHg). PaO2 indicates how well oxygen is being transferred and available for tissues to use. Higher PaO2 values generally mean better oxygenation, while lower levels can signal issues like lung problems or impaired oxygen exchange. It’s an important indicator for assessing respiratory function and ensuring the body's tissues receive enough oxygen to operate properly.