injuries poisoning
How To Do Nail Trephination
Contraindications to Nail Trephination
Avulsion of the nail from the nail bed, splitting of the nail, or extension of a laceration from the nail bed to the skin: These injuries require nail removal. More than 1 to 2 days since injury: By this time, blood within a subungual hematoma will likely have clotted and trephination will not be effective. 