While assessing a patient who was involved in a serious car crash and hit his steering wheel, the respiratory therapist observes that a section of his left anterior chest wall sinks inward during inspiration. What is the most likely cause?
a. Pulmonary fibrosis
b. Flail chest
c. Pneumothorax
d. Cardiac tamponade
B
A flail segment of a flail chest would move inward during inspiration, opposite of normal chest wall movement.
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