Certified Registered Nurse Anesthetist (CRNA) Practice Exam

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Study for the Certified Registered Nurse Anesthetist (CRNA) Exam. Practice with flashcards, multiple-choice questions, hints, and explanations. Prepare effectively to succeed on your exam!

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During a surgical procedure, what is the primary reason to monitor end-tidal carbon dioxide levels?

To evaluate blood glucose levels
To assess ventilation and confirm tube placement
To monitor blood pressure
To evaluate oxygen saturation

The correct answer is: To assess ventilation and confirm tube placement

Monitoring end-tidal carbon dioxide (ETCO2) levels is crucial during a surgical procedure primarily to assess ventilation and confirm tube placement. ETCO2 provides real-time feedback on the effectiveness of ventilation; an increase in ETCO2 can indicate hypoventilation, while a decrease may suggest hyperventilation or even malfunctioning equipment. Additionally, confirming tube placement is vital, particularly in intubated patients. By measuring ETCO2, clinicians can determine whether the endotracheal tube is properly positioned in the trachea rather than the esophagus. If the tube is placed correctly, CO2 will be detected in the exhaled air, ensuring that the patient is receiving adequate ventilation. The other options, while important in their own right, do not directly relate to the role of ETCO2 monitoring. Blood glucose levels, blood pressure, and oxygen saturation are monitored using different methods and are not assessed through end-tidal carbon dioxide levels.