Telescoping needle shield with blood exposure prevention

A catheter system comprising:

• a catheter assembly comprising a catheter adapter and a catheter extending distally from the catheter adapter;
• and
• a needle shield device that is selectively coupled to the catheter assembly, the needle shield device comprising:
• a needle assembly that includes a needle hub, a needle grip disposed around the needle hub and an introducer needle extending distally from the needle hub;
• and
• a needle housing to which the needle assembly is slidably coupled such that, when the needle assembly is slid from a distal position to a proximal position relative to the needle housing, a distal tip of the introducer needle is retracted into the needle housing;
• wherein the needle housing comprises:
• an elongated body having a straight slot that extends from a proximal end of the elongated body to a distal end of the elongated body;
• and
• an inner sleeve that is positioned within the elongated body and configured to rotate within the elongated body, the inner sleeve including a curved slot that extends from a proximal end of the inner sleeve to a distal end of the inner sleeve;
• wherein the needle grip includes a protuberance that extends inwardly through the straight slot of the elongated body and the curved slot of the inner sleeve such that, as the needle assembly is slid from the distal position to the proximal position, the protuberance slides within the straight slot and the curved slot to thereby cause the inner sleeve to rotate relative to the elongated body, the rotation of the inner sleeve relative to the elongated body causing the inner sleeve to cover the straight slot at a distal end of the elongated body.