A set of safety IV catheter, comprising: a needle (16)； a tubular catheter (24)； a mount (26) secured to catheter proximal end of the tubular catheter (24)； a mount (12) attached to the proximal needle end of the needle (16)； the needle comprising a tip (18) needle and a needle body which is inside the tubular catheter (24) when in a ready position, being movable needle (16) from the ready position, wherein the tip ( 18) of the needle is outside the frame (26) of the catheter, to a retracted position in which the locking tip (18) of the needle is within the interior of the frame (26) of the catheter； and a needle shield spring clip (96) which is releasably connected to the inside of the frame (26) of the catheter in the ready position and which covers and blocks the needle tip in the retracted position lock, comprising protection spring clip needle (96) a rear wall (106, 168) with upper and lower ends that contact both with the inner wall of the frame (26) of the catheter, wherein the rear wall (106, 168) includes a opening (58, 170) through which passes the needle body and an arm (98, 50) extending distally from the rear wall (106, 168) and whose distal end extends to a distal arm (112 , 152) which in turn terminates in a curved lip (114, 154), wherein the needle body through the needle shield spring clip (96) and applies a radial outward force on the arm (98, 150 ) by engagement with a flange (114, 154), in order to push the distal end of the b razo (98, 150) in engagement with the inner wall of the frame (28) of catheter prepared to securely hold the needle shield spring clip in the catheter hub position, wherein the distal arm (112 , 52) covers and blocks the tip (18) of the needle in the retracted position lock, and wherein in the retracted position locking the spring clip (96) is held in the needle (16) and will be separated from the frame (26) when the needle catheter is removed completely.Un conjunto de catéter IV de seguridad, que comprende: una aguja (16)；
