The esophageal detector device indicates correct tracheal placement when the bulb

The esophageal detector device indicates correct tracheal placement when the bulb

• A. Inflates due to air from the lung
• B. Remains collapsed
• C. Shows a rapid color change
• D. Produces a audible click

Answer: (A)

The device works by using air from the lungs to fill the bulb. If the endotracheal tube is in the trachea, releasing the bulb allows alveolar air to be transmitted up the tube and inflate the bulb, indicating tracheal placement. If the tube is in the esophagus, there’s no airway link to the lungs, so the bulb remains collapsed. That inflation from the lung air is why inflation is the best indicator of correct placement. The other cues (like a color change or a click) aren’t how this device signals position. Real-world use also pairs this with other methods such as capnography and auscultation for confirmation.

The device works by using air from the lungs to fill the bulb. If the endotracheal tube is in the trachea, releasing the bulb allows alveolar air to be transmitted up the tube and inflate the bulb, indicating tracheal placement. If the tube is in the esophagus, there’s no airway link to the lungs, so the bulb remains collapsed. That inflation from the lung air is why inflation is the best indicator of correct placement. The other cues (like a color change or a click) aren’t how this device signals position. Real-world use also pairs this with other methods such as capnography and auscultation for confirmation.