Safety blood collection needle assembly

A dual blunting safety assembly comprising:

• a) a needle holder;
• and
• b) a needle assembly in engagement with said needle holder, said needle assembly comprising:
• i) a hub assembly having a first external cannula with an intravenous puncture tip extending from a first end, a second external cannula with an external blunt tip extending from a second opposing end, and an internal lumen extending through said hub assembly from said intravenous puncture tip to said external blunt tip, and
• ii) an internal cannula extending concentrically within said internal lumen of said hub assembly, said internal cannula having an internal blunt tip at a first end, a non-patient puncture tip at a second end, and an internal lumen extending from said internal blunt tip to said non-patient puncture tip, said internal cannula adapted for axial displacement within said internal lumen of said hub assembly between a first retracted position in which said blunt tip of said internal cannula is positioned within said internal lumen of said first external cannula and said non-patient puncture tip extends beyond said blunt tip of said second external cannula and a second activated position in which said blunt tip of said internal cannula extends beyond said intravenous puncture tip of said first external cannula and said non-patient puncture tip is positioned within said second external cannula.

A dual blunting safety assembly comprising:

• a) a needle assembly comprising:
• i) a hub assembly having opposed first and second ends and an internal lumen extending therethrough;
• ii) a first external cannula extending from a first end of said hub assembly, said first external cannula having an intravenous puncture tip and an internal lumen in fluid communication with said internal lumen of said hub assembly;
• iii) a second external cannula extending from a second end of said hub assembly, said second external cannula having a blunt tip and an internal lumen in fluid communication with said internal lumen of said hub assembly;
• and
• iv) an internal cannula disposed concentrically within said hub assembly, said internal cannula having a blunt tip at a first end adjacent said intravenous puncture tip of said first external cannula, a non-patient puncture tip at a second end adjacent said blunt tip of said second external cannula, and an internal lumen extending from said blunt tip to said non-patient puncture tip;
• and
• b) a needle holder having a first end for receiving said non-patient puncture tip of said internal cannula and said blunt tip of said second external cannula, said needle holder including a mechanism for axially displacing said internal cannula within said internal lumens of said hub assembly and said first and second external cannulas from a first retracted position in which said blunt tip of said internal cannula is positioned within said internal lumen of said first external cannula and said non-patient puncture tip extends beyond said blunt tip of said second external cannula and a second activated position in which said blunt tip of said internal cannula extends beyond said intravenous puncture tip of said first external cannula and said non-patient puncture tip is positioned within said second external cannula.