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NBME 20 Answers
A 19-year-old man who is a college student is ...
Actually when a fractured rib puncture lung then it cause sc emphysema.
Crepitus is used to describe bone-on-bone grinding. Subcutaneous crepitus is very specific sound referencing air finding its way into the skin which you can hear but also feel by rubbing your hand over the affected area. The addition of subcutaneous lets you know we are specifically talking about air in the skin.