Share 'Medical knowledge?'

Now some of you may ask why would we need medical knowledge when we are killing zombies? so I'll answer, what happens if you slip with you sword and you cut off a hand or stab your self? or you fall and break something? how would you fix it? I am not asking for a brain surgeon to tell me but just a normal person to see if they know what to do, but anyone in the medical field is welcome to post th…