JBL Airway Practice Test 2026 - Free JBL Airway Practice Questions and Study Guide

Proper confirmation of endotracheal tube placement is essential to ensure effective ventilation and oxygenation. Utilizing capnography or observing end-tidal CO2 levels provides immediate and reliable evidence of correct placement. When the endotracheal tube is positioned correctly in the trachea, it allows exhaled carbon dioxide (CO2) from the lungs to be detected, indicating that air is indeed moving in and out of the lungs through the tube. A positive reading on capnography or the presence of end-tidal CO2 confirms that the tube is not in the esophagus, which would not produce CO2.

Other methods, such as checking vital signs or listening to heart sounds, do not directly provide information about the tube's position in the airway. Visual inspection of the tube also does not guarantee proper placement, as it is possible for the tube to be misplaced while still appearing in the correct location from an external viewpoint. Therefore, the use of capnography is the most accurate and immediate method to confirm that an endotracheal tube has been correctly placed for effective airway management.