Flush syringe having compressible plunger

摘要

An I.V. flush syringe assembly includes a barrel 22 having an inside surface 32 defining a chamber 33 for retaining fluid, an open proximal end 28 and a distal end 30 with a passageway 38 therethrough in fluid communication with the chamber 33. An elongate plunger 24 having a proximal end 50, a distal end 52 and a stopper 54 is slidably positioned in fluid-tight engagement with the inside surface 32 of the barrel 22 for drawing fluid into and out of the chamber by movement of the stopper 54 relative to the barrel 22. The plunger 24 includes anti-reflux structure for minimizing stopper deflection when fluid has been delivered from the chamber 33 and the stopper 54 is being forced against the distal end 30 of the chamber. c~C) -4 (N