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Question
A neck ultrasound is performed during endotracheal intubation. What is labeled "A", what is labeled "B" and what's the diagnosis?

Answer
Answer:
A: Trachea
B: Esophagus
This is an esophageal intubation! Take out the tube and try again. Check out this podcast for more on the technique from my good friends at the ultrasound podcast
Here's a summary:

References
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