Restrictive Lung Disease USMLE Step 1 Practice Question
A 35-year-old man on mechanical ventilation for pneumonia suddenly develops severe dyspnea and hypotension. Vital signs show BP 85/50, HR 128, RR 32, SpO2 78% on FiO2 1.0. Physical examination reveals absent breath sounds on the left, distended neck veins, and tracheal deviation to the right. Chest X-ray shows leftward mediastinal shift with absent left-sided lung markings. There is no subcutaneous emphysema. Which of the following is the most likely diagnosis?
Answer choices
- ATension pneumothoraxCorrect answer
- BPleural effusion
- CSpontaneous pneumothorax
- DAcute respiratory distress syndrome
- EPulmonary embolism
- FEndobronchial intubation (right mainstem intubation)
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