Intravenous catheter apparatus, comprising: a catheter hub (12) disposed at a proximal end of a catheter tube (May 10), wherein the catheter hub (12) having an inner surface (14) defining a chamber (16 ) a needle (20) defining an axial direction and having a needle tip (24), the needle (20) extending through the chamber (16) and catheter tube (10) when it is in a ready position for use a needle guard (32) slidably disposed over the needle (20) and received in the chamber (16) when the needle (20) is in the position ready for use, including the needle shield (32) a portion base (34) and first and second arms (36, 38) extending from the base portion (34), wherein the first arm (36) is deflected radially outward by the needle (20) against a restoring force when the needle (20) is in the position ready for use, standing, thus, the needle guard (32) in retaining contact with the catheter hub (12) and means for retaining the needle shield (32) in the chamber (16) while the first arm (36) is in its state deflected, characterized in that the retaining means include a first retaining projection as disc (58) provided on the first arm (36) and a recess retainer (18) formed on the inner surface (14) and adapted to receive the retaining projection (58), wherein the protrusion (58) It presents generally parallel proximal and distal faces (60, 62).Aparato de catéter intravenoso, que comprende: un casquillo de catéter (12) dispuesto en un extremo proximal de un tubo de catéter (5 10), presentando el casquillo de catéter (12) una superficie interior (14) que define una cámara (16) una aguja (20) que define una dirección axial y que presenta una punta de aguja (24), extendiéndose la aguja (20) a través de la cámara (16) y el tubo de catéter (10) cuando se encuentra en una posición lista para utilización un protector de aguja (32) dispuesto de manera deslizante sobre la aguja (20) y recibido en la cámara (16) cuando la aguja (20) se encuentra en la posición lista para utilización, inc
