Actually, there is an easier way to do this and it dates back to the middle ages and was used extensively to treat gangrene and aid bleeding well into the 19th century (its now used by some S@M folks for home entertainment purposes as well

) Its called "candling". Basically it requires a a small round piece of leather or cardboard, a votive or tea candle and a short round drink glass. You light the candle, place it on the pad and cover it with the glass. The candle exhausts the O2 and forms a vacum. This raises the covered skin in a bump and draws the blood to the surface. The medieval docs would take the glass off quickly and then apply a leech or use a lancet to bleed the patient, or just do it to bring fresh blood to the wounded area.. (I neither know nor want to know what the kinky folks do).
FQ13