Foreign Body Aspiration

Foreign Body Aspiration


Radiopaque foreign bodies such as coins, marbles, and teeth are visible on standard radiographs. Indirect signs indicating the presence of a nonopaque foreign body include:

  1. Unilateral pulmonary lucency: This results from hyperinflation due to a check-valve obstruction and from reflex oligemia due to hypoventilation.
  2. Mediastinal shift: Air trapping in the affected lung leads to mediastinal shift to the contralateral side in expiration and a return to its normal position in inspiration.
  3. Lobar atelectasis and distal pneumonia develop when bronchial obstruction persists for at least several hours.