Foreign body aspiration in supine position causes which of the following parts of the lung commonly to be affected –
**Core Concept**
Foreign body aspiration can lead to lung injury, and the position of the patient at the time of aspiration affects which part of the lung is most commonly affected. In the supine position, the posterior segments of the upper lobes are more prone to aspiration due to gravity.
**Why the Correct Answer is Right**
When a patient is in the supine position, the foreign body is more likely to settle in the posterior segments of the upper lobes, specifically the apical and posterior segments of the right upper lobe, and the superior segment of the left upper lobe. This is because these areas are higher in the thoracic cavity and are more dependent due to gravity. As a result, the posterior segments of the upper lobes are commonly affected in cases of foreign body aspiration in the supine position.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the middle lobe is not typically affected in foreign body aspiration in the supine position. The middle lobe is more prone to collapse and infection due to its smaller size and lower position in the thoracic cavity.
**Option B:** This option is incorrect because the lower lobes are less likely to be affected in foreign body aspiration in the supine position. The lower lobes are higher in the thoracic cavity when the patient is supine, making it less likely for foreign bodies to settle in these areas.
**Option C:** This option is incorrect because the lingula is a part of the left lower lobe and is not typically affected in foreign body aspiration in the supine position.
**Clinical Pearl / High-Yield Fact**
When evaluating a patient with a suspected foreign body aspiration, it's essential to consider the patient's position at the time of aspiration, as this can affect which part of the lung is most commonly affected.
**Correct Answer:** C.