https://experts.umn.edu/en/publications/emergency-twist-drill-trephination/
Emergency twist drill trephination - Experts@Minnesota
twist drillemergencyexpertsminnesota
https://my.clevelandclinic.org/health/procedures/nail-trephination
Trephination Procedure
Nail trephination is a quick procedure that drains blood from a bruised nail (subungual hematoma). This relieves pressure and pain under your nail.
procedure