Where would a shelled peanut aspirated by an adult be most likely to lodge?
A. Anterior pharynx
B. Posterior pharynx
C. Left mainstem bronchus
D. Right mainstem bronchus
D
Aspiration involves the presence of a substance or object beyond the pharynx in the respiratory passages. Most aspirated objects the size of a peanut would move beyond the wide trachea and lodge in one of the two mainstem bronchi. The right bronchus is more vertical than the left and is also wider. More than 90% of small aspirated objects lodge in the right mainstem bronchus.
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