Peseshkef: the first special-purpose surgical instrument.

The Peseshkef, a prehistoric flint knife in the shape of a fish tail, was used in Egypt to cut the umbilical cord at birth, circa 5000 BC. This was the first special-purpose surgical instrument. Because of the importance of rebirth in the Egyptian religion, a stylized knife with magical properties became part of the equipment for the "opening of the mouth" ceremony to permit a mummy to partake of nourishment in the afterlife. It also became the emblem of the birth goddess, Meskhenet.