Flush syringe having anti-reflux features

Details Flush syringe having anti-reflux features Flush syringe having anti-reflux features

A - Human Necessities

61

M

A61M 5/31 (2006.01)

Patent

CA 2539813

An IN. flush syringe assembly includes a barrel having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end including a distal wall with an elongate tip extending distally therefrom having a passageway therethrough in fluid communication with the chamber. A plunger (24) having an elongate body portion and a stopper (54) slidably positioned in fluid-tight engagement with the inside surface of the barrel is provided. Anti-reflux structure (35) in said barrel is provided for controlling stopper deflection when fluid has been delivered from the chamber and the stopper is in contact with structure on the distal wall.

L'invention concerne un ensemble seringue IV à affleurement, qui comprend un cylindre dont une surface intérieure délimite une chambre de retention du liquide; une extrémité proximale ouverte, et une extrémité distale présentant une paroi distale prolongée distalement d'une pointe allongée qui comporte un conduit traversant communiquant librement avec la chambre. L'ensemble seringue comprend un piston (24) présentant une partie de corps allongée et une butée (54) coulissante en contact étanche avec la surface intérieure du cylindre. Une structure antiretour (35) est ménagée dans le cylindre pour réguler la déflexion de la butée lorsque le liquide est évacué de la chambre et que la butée est en contact avec la structure placée sur la paroi distale.

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