What is the normal range for PaCO2?

The normal range for arterial carbon dioxide pressure (PaCO2) is typically 35-45 mmHg. This range is critical in assessing a patient's respiratory function and metabolic status. When the PaCO2 is within this range, it indicates that the body is effectively eliminating carbon dioxide, which is a byproduct of metabolism, and maintaining adequate acid-base balance. Values below this range may suggest hyperventilation or conditions causing excessive elimination of CO2, while higher values may indicate hypoventilation or respiratory conditions leading to carbon dioxide retention. Understanding the normal PaCO2 range is essential in critical care for evaluating a patient’s ventilation status and guiding appropriate treatment interventions.