During ventilation support via bag-valve-mask, a blood gas is taken. What PaCO2 value indicates adequate ventilations?

The appropriate range for PaCO2 that indicates adequate ventilation is 35 to 45 mmHg. This range reflects the normal physiological balance of carbon dioxide in the bloodstream, suggesting that the body is effectively eliminating carbon dioxide through adequate ventilation. When the PaCO2 level falls within this range, it generally indicates that the individual is receiving sufficient ventilation, allowing for proper gas exchange and avoiding hypercapnia, a condition associated with respiratory inadequacy.

Values below 35 mmHg may indicate hyperventilation or conditions where carbon dioxide is being excessively removed, which can lead to respiratory alkalosis. Conversely, values above 45 mmHg suggest hypoventilation or inadequate ventilation, resulting in a buildup of carbon dioxide and potential respiratory acidosis. Values exceeding 55 mmHg indicate significant hypoventilation, which would necessitate immediate intervention to avoid critical complications. Thus, the correct answer is based on the physiological norm that supports adequate ventilation in a clinical setting.