THERE IS DISCLOSED A CATHETER ASSEMBLY (200) COMPRISING: A CATHETER HUB (14) COMPRISING A HOUSING COMPRISING AN EXTERIOR SURFACE (20) AND AN INTERIOR SURFACE (22) DEFINING A CAVITY (24)； A CATHETER TUBE (12) ATTACHED TO THE CATHETER HUB (14) AND EXTENDING DISTALLY OF THE CATHETER HUB (14)； A NEEDLE HUB (18) COMPRISING A HOUSING； A NEEDLE (16) HAVING A NEEDLE TIP (72) ATTACHED TO THE NEEDLE HUB (18) AND PROJECTING DISTALLY OF THE NEEDLE HUB (18) AND INTO THE CATHETER TUBE (12)； A VALVE (46) FOR LIMITING BLOOD BACKFLOW POSITIONED IN THE INTERIOR CAVITY (24) OF THE CATHETER HUB (14)； A VALVE OPENER (48) FOR OPENING THE VALVE (46) POSITIONED PROXIMALLY OF THE VALVE (46)； AND A PASSIVE OR SELF-ACTIVATING DEVICE FOR COVERING THE NEEDLE (16), COMPRISING: A THIRD HOUSING (204)； A TIP PROTECTOR (202) ACCOMMODATED WITHIN THE THIRD HOUSING (204) FOR BLOCKING THE NEEDLE TIP (72)； AND AN ARM (210) EXTENDING FROM THE THIRD HOUSING (204) TO ENGAGE THE CATHETER HUB (14). (FIG. 13)
