What is an acceptable ETCO2 value indicating adequate ventilation?

An ETCO2 (end-tidal carbon dioxide) value of 35 to 45 mmHg is considered reflective of adequate ventilation. This range indicates that there is a proper balance between carbon dioxide production and elimination in the body. When this value is maintained, it suggests that the patient is effectively ventilating and that the respiratory exchange is adequate, which is crucial for maintaining proper acid-base balance and preventing respiratory acidosis or alkalosis.

Values below 35 mmHg can indicate hyperventilation, where too much carbon dioxide is being expelled, potentially leading to respiratory alkalosis. Conversely, values above 45 mmHg can signify hypoventilation, where carbon dioxide is building up in the body, leading to respiratory acidosis. Therefore, the 35 to 45 mmHg range is the gold standard for healthy, adequate ventilatory function in patients.