A NEEDLE APPARATUS

摘要

A needle apparatus has a thin walled catheter enclosing a tubular needle having a sharp point, the catheter and the needle being relatively moveable longitudinally a short distance, from a first position where the needle projects from the catheter and to a second position at which the sharp point is located within the catheter. The needle remains in the fluid pathway of the needle apparatus at all times. The needle apparatus is arranged to pierce tissue when the catheter and the needle are in the first position.