Patent ID: 7682342

Claim:
An I.V. flush syringe assembly comprising: a syringe barrel having an elongated body defining a chamber for retaining fluid, an open proximal end, a distal end and a frusto-conically shaped tip extending from said distal end having a tip passageway therethrough in fluid communication with said chamber, said chamber having an inside diameter of at least 13.5 mm (0.53 inch), said chamber having a distal end defined by a distal wall through which said passageway passes, the length of said chamber being no more than 57 mm (2.25 inches); a stopper in fluid-tight engagement inside said barrel; an elongated rigid plunger rod defining a longitudinal axis and extending proximally from said stopper through said open proximal end of said barrel, a flange at a proximal end of said plunger rod; a tip cap releasably connected to said tip for sealing said passageway; and flush solution in said chamber in an amount less than 10 ml, wherein the fluid pressure in the flush solution injected through said passageway is less than 40 psi when a ten pound force is applied to the plunger rod.