What end-tidal carbon dioxide (ETCO2) value confirms adequate ventilation in an intubated patient in respiratory arrest?

The correct answer is aligned with the physiological norms for end-tidal carbon dioxide (ETCO2) in a patient who is being monitored for adequate ventilation after intubation. In a healthy individual, the typical range of ETCO2 is approximately 35-45 mmHg. This range indicates effective ventilation and proper function of the respiratory system as carbon dioxide is being adequately exhaled from the lungs.

In the context of an intubated patient in respiratory arrest, achieving a value within this range suggests that the ventilation provided—whether through bag-mask ventilation or mechanical ventilation—is sufficient to effectively eliminate CO2, which is crucial for maintaining acid-base balance and preventing respiratory acidosis.

Values outside this range can indicate inadequate ventilation; for instance, lower ETCO2 values may suggest hypoventilation or ineffective breaths that are not clearing CO2 effectively, while significantly higher values can suggest hypoventilation or respiratory failure, requiring prompt adjustments in care. Therefore, aiming for an ETCO2 of 35-45 mmHg is critical in confirming that the ventilation provided is adequate in an intubated patient.