Patent ID: 8784376

Claim:
A syringe assembly comprising: a barrel including a cylindrical sidewall having an interior surface with a first cross-sectional width defining a chamber for retaining fluid, an open proximal end and a distal end including a distal wall having an opening therethrough in fluid communication with said chamber; an elongate plunger rod including a proximal end with a detachable thumb press, a distal end, a main body extending between the proximal and distal end, and a frangible element disposed at the proximal end of the plunger rod inside the thumb press, the frangible element comprising a plurality of break point connections inside the thumb press, the plunger rod being distally and proximally movable within the chamber, the distal end including a stopper slidably positioned in fluid-tight engagement with the inside surface of the barrel for drawing fluid into and driving fluid out of the chamber by movement of the stopper relative to the barrel; and a locking element disposed on one or more of the barrel and plunger rod.