What is considered a normal range for end-tidal CO2 (ETCO2)?

The normal range for end-tidal carbon dioxide (ETCO2) is typically considered to be between 35-45 mmHg. This range is significant because it provides information about a patient's ventilation and overall respiratory function. Maintaining ETCO2 levels within this range is essential for adequate gas exchange in the lungs. If the levels are below 35 mmHg, it may indicate hyperventilation or inadequate carbon dioxide retention, while levels above 45 mmHg may suggest hypoventilation or an inability to effectively exhale carbon dioxide.

Understanding the importance of ETCO2 monitoring is crucial for assessing a patient's respiratory status, especially in trauma cases where changes in ventilation can occur rapidly. The selected range reflects optimal metabolic and respiratory balance, which is necessary for maintaining homeostasis in the body.