What is the normal range for PaCO2 in mmHg?

The normal range for PaCO2, which represents the partial pressure of carbon dioxide in arterial blood, is 35-45 mmHg. This range reflects the body's ability to regulate carbon dioxide as a product of metabolism and its elimination through respiration. Maintaining PaCO2 within this range is crucial for acid-base balance, as deviations can indicate respiratory or metabolic issues. Values below 35 mmHg suggest hyperventilation or respiratory alkalosis, while values above 45 mmHg indicate hypoventilation or respiratory acidosis. Therefore, understanding this range is essential for assessing a patient’s ventilation status and metabolic processes in critical care scenarios.