Comparison of nail bed repair versus nail trephination for subungual hematomas in children.

Fifty-three fingers in 52 children were divided into 2 groups, operative and nonoperative, after fingernail crush injury. Criteria for inclusion into the study were an intact nail and nail margin with subungual hematoma and no previous nail abnormality. The length of the follow-up period averaged longer than 2 years for each group. Twenty-six fingers in 26 children were treated by nail removal, exploration, and repair of nail bed lacerations (operative group). Twenty-seven fingers in 26 children were treated by evacuation of hematoma by nail trephination without nail removal in 11 fingers and by observation in the other 16 fingers (nonoperative group). In the operative group, transient abnormalities (nail depression or hypertrophy), which resolved by 4 months, occurred in 3 patients. In the group treated by simple decompression, there were no complications except for 1 transient nail depression at 3 months. The average cost to the operative group was $1,263 compared with $283 to the trephination group. Although formal nail bed reconstruction has been advocated for hematomas larger than 25%, we found no notable difference in outcome between the 2 groups regardless of hematoma size, presence of fracture, injury mechanism, or age. Charges, however, were 4 times greater for the operative group. Based on the results of this study, we do not feel that nail removal and nail bed exploration is indicated or justified for children with subungual hematoma and an intact nail and nail margin.