Patent ID: 6905485

Claim:
A medical device comprising: a first needle cannula having proximal and distal ends, at least said distal end being sharp for insertion into a patient; a first needle hub, said first needle cannula being mounted to said first needle hub; a second needle cannula; tubing having at least a first lumen for establishing fluid communication between said first needle cannula and said second needle cannula; an actuatable shield for selectively at least partially encapsulating said distal end of said first needle cannula, said shield being movable relatively to said first needle cannula upon actuation from an initial first position wherein said first needle cannula is at least partially exposed to a second position wherein at least said distal end of said first needle cannula is at least partially encapsulated by said shield; an actuator for actuating said shield, said actuator being engageable at a location spaced from said first needle cannula and said first needle hub to cause actuation of said shield; and, a second lumen in communication with an actuation trigger of said shield, said actuator being at least partially disposed in said second lumen, wherein said actuator includes a fluid column disposed in said second lumen, wherein, compression or displacement of a fluid in said fluid column causes exertion of pressure by said fluid against said actuator trigger, wherein upon reaching a predetermined level of said compression or said displacement, said pressure exerted by said fluid against said actuation trigger activates said trigger, thereby actuating said shield.