THE INVENTION RELATES TO A NEEDLE GUARD (26) FOR USE IN A MEDICAL DEVICE, IN PARTICULAR FOR USE IN A CATHETER DEVICE (10), INCLUDING A BASE PORTION (44) HAVING A NEEDLE PASSAGE (56) EXTENDING IN AN AXIAL DIRECTION FROM A PROXIMAL SIDE (58) OF SAID BASE PORTION (44) THROUGH SAID BASE PORTION (44) TO A DISTAL SIDE (60) OF SAID BASE PORTION (44) WHEREIN A NEEDLE SHAFT (28) HAVING A PRINCIPLE OUTER PROFILE CAN BE MOVABLY ARRANGED IN SAID NEEDLE PASSAGE (56)； FIRST AND SECOND ARMS (46, 48) EXTENDING SUBSTANTIALLY IN SAID AXIAL DIRECTION FROM SAID DISTAL SIDE (60) OF SAID BASE PORTION (44), WHEREIN SAID FIRST ARM (46) HAS A DISTAL REGION (62) AND A PROXIMAL REGION (64)； AND A DISTAL WALL (50) TRANSVERSELY ARRANGED AT SAID DISTAL REGION (62) OF SAID FIRST ARM (46). THE INVENTION FURTHER RELATES TO A CATHETER APPARATUS (40) INCLUDING SUCH A NEEDLE GUARD (26) AND A NEEDLE (20). FIG. 5A
