Nail bed injury detected by ultrasonography.

A 46-year-old man presented to the emergency department after being injured with a press machine from his left hand 30 minutes before admission. Subungual hematoma was diagnosed in his index finger, although the nail plate was intact. Emergency physicians could identify nail bed injury with bedside ultrasonography examination. This noninvasive, inexpensive, and repeatable diagnostic modality could preserve patients from a complex, invasive nail removal procedure.