Iv catheter with integral extension set and a spring powered needle safety

Abstract

Catheter and needle assemblies with spring-powered retractable needles are described. The assemblies can include a hollow handle, a grip portion, a catheter hub with a catheter, and a needle. The needle can have a first position in which the needle is slidably disposed within the catheter and a second position in which the needle is slidably removed from the catheter and retracted at least in part into the hollow handle. The grip portion can include a trigger portion that activates a spring to move the needle from the first position into the second position. In the second position, a sharp distal point of the needle is shielded by the grip portion to prevent accidental needle sticks.

1 . A catheter and needle assembly comprising:
 a hollow handle coupled to a grip portion, the hollow handle and grip portion comprising an elongate cavity;   a catheter hub comprising:
 a catheter; 
 a septum; and 
 a fluid junction in fluid communication with an extension tubing; and 
   an elongate needle mounted on a needle carriage,   wherein the needle carriage is slidably disposed within the elongate cavity, and   wherein the elongate needle comprises a first position in which the elongate needle is slidably disposed within the catheter and a second position in which the elongate needle is slidably removed from the catheter and retracted at least in part into the hollow handle.   
     
     
         2 . The assembly of  claim 1 , wherein the grip portion comprises a trigger portion configured to activate a spring to slidably drive the needle carriage along the elongate cavity to move the elongate needle from the first position into the second position. 
     
     
         3 . The assembly of  claim 1 , wherein the septum is configured to be traversed by the elongate needle when the elongate needle is in the first position and configured to form a fluid-tight seal when the elongate needle is slidably removed from the septum as the elongate needle moves to the second position. 
     
     
         4 . The assembly of  claim 1 , wherein the needle carriage comprises a carriage extension configured to detachably couple with a proximal fitting of the catheter hub when the elongate needle is in the first position. 
     
     
         5 . The assembly of  claim 1 , wherein the needle carriage comprises a needle carriage cavity in fluid communication with an open bore of the elongate needle. 
     
     
         6 . The assembly of  claim 1 , wherein the needle carriage comprises a neck configured to engage a trigger tab to maintain the elongate needle in the first position. 
     
     
         7 . The assembly of  claim 6 , wherein depressing a trigger button slides the trigger tab to disengage the neck to retract the elongate needle to the second position. 
     
     
         8 . The assembly of  claim 1 , wherein a sharp distal point of the elongate needle is shielded by the grip portion when the elongate needle is in the second position.