What is the normal range for arterial carbon dioxide pressure (PaCO2)?

The normal range for arterial carbon dioxide pressure (PaCO2) is defined as 35-45 mmHg. This range indicates the appropriate levels of carbon dioxide in the blood, which is crucial for maintaining acid-base balance in the body.

Carbon dioxide is a byproduct of metabolism and is transported in the bloodstream to the lungs, where it is exhaled. Monitoring PaCO2 levels is essential in respiratory care, as deviations from the normal range can indicate issues such as hypoventilation or hyperventilation. High levels (above 45 mmHg) suggest that the body is not effectively removing CO2, possibly leading to respiratory acidosis, while low levels (below 35 mmHg) can indicate excessive ventilation, leading to respiratory alkalosis.

Understanding this range is fundamental for respiratory therapists and healthcare professionals, as it assists in identifying and managing various respiratory conditions.