EFINITION igh-pressure injection injuries occur when equipment apable of achieving pressures sufficient to breach the uman skin injects its contents into the human body, ost commonly into the hand. The pressure required to penetrate intact human skin is commonly cited at 7 bar (7 10 N/m) or 100 psi. A careful review of that eference provides no source or justification for the umber. Nevertheless, oddly, it is cited by multiple uthors.