Investigations
The arterial blood oxygen saturation was 93%. Arterial blood gas
analysis was normal, and blood and urine investigations showed
essentially normal results. Electrocardiography was normal. Suspecting
foreign body aspiration (FBA), a high-resolution computed tomography
(HRCT) of the chest was conducted, which revealed the presence of an
oval, relatively dense object measuring approximately 8 x 7 mm, likely
causing partial obstruction of the bronchus (Figure 1A ).
Additionally, there was partial atelectasis of the left upper lobe, with
the rest of the lungs showing mild emphysematous changes (Figure
1B ).