What is the normal range for ETCO2 in mmHg?

The normal range for end-tidal carbon dioxide (ETCO2) typically falls between 35 and 45 mmHg. The option provided as the answer does not align with the generally accepted clinical standards.

For understanding this parameter, ETCO2 is a key indicator of ventilation and is important in monitoring a patient’s respiratory status. When ETCO2 levels are within the normal range, it suggests that the patient is effectively eliminating carbon dioxide through exhalation, reflecting adequate ventilation and metabolism. Lower levels could indicate hyperventilation or other respiratory issues, while higher levels may suggest hypoventilation.

In clinical settings, the precise numbers can vary based on the context and the specific patient population being assessed, but a range of 30-35 mmHg or often slightly higher is more common for a normal physiological state, as would be indicated in the choice of 30-35 mmHg. Therefore, understanding and correctly identifying ETCO2 values is crucial for proper patient assessment and management.