Coupling between a telescoping needle shield and a catheter adapter

A catheter system, comprising:

• a catheter adapter, comprising a distal end, a proximal end, and an internal wall forming a lumen extending through the distal end of the catheter adapter and the proximal end of the catheter adapter;
• and
• a needle shield device coupled to the catheter adapter, the needle shield device comprising:
• a needle housing, comprising:
• an elongated body having a distal end, a proximal end, and a slot disposed between the distal end of the elongated body and the proximal end of the elongated body;
• and
• a nose portion coupled to the distal end of the elongated body and extending into the lumen of the catheter adapter;
• a needle assembly slideably coupled to the needle housing, comprising:
• an introducer needle comprising a sharp distal tip and a proximal end;
• a needle grip;
• and
• a needle hub having a protuberance, wherein the proximal end of the introducer needle is secured within the needle hub, wherein the protuberance is coupled to the needle grip, wherein the protuberance slideably fits within the slot, wherein the needle assembly is moveable between a distal position and a proximal position with respect to the needle housing, wherein in response to movement of the needle assembly to the proximal position, the sharp distal tip is disposed within the needle housing,
• wherein the needle shield device comprises a flexible arm coupled to the proximal end of the catheter adapter.

A needle shield device, comprising:

• a needle housing configured to couple to a proximal end of a catheter adapter, the needle housing comprising:
• an elongated body having a distal end, a proximal end, and a slot disposed between the distal end of the elongated body and the proximal end of the elongated body;
• and
• a nose portion coupled to the distal end of the elongated body, wherein the nose portion comprises a plate and an extension extending distally from the plate, wherein the extension comprises a plurality of protrusions, wherein each of the plurality of protrusions are configured to contact an internal wall of the catheter adapter;
• a needle assembly slideably coupled to the needle housing, comprising:
• an introducer needle comprising a sharp distal tip and a proximal end;
• a needle grip;
• and
• a needle hub having a protuberance, wherein the proximal end of the introducer needle is secured within the needle hub, wherein the protuberance is coupled to the needle grip, wherein the protuberance slideably fits within the slot, wherein the needle assembly is moveable between a distal position and a proximal position with respect to the needle housing, wherein in response to movement of the needle assembly to the proximal position, the sharp distal tip is disposed within the needle housing.