Patent ID: 7641637
Filing Date: 2010-01-05
Classification: A61B,A61M

Abstract:
1. A controlled volume injection/aspiration device comprising: a syringe having a body for containing a medicament, a needle and a piston slidably disposed in said body along a body centerline; a plunger rack slidably disposed along the body centerline for moving said piston along the body centerline; a manually operated control rod disposed in an operative parallel relationship with said centerline, and slidable therealong, for providing stepwise movement of said plunger rack in a forward direction causing said piston to eject discrete doses of medication from said syringe body through said needle and stepwise movement of said plunger rack in a reverse direction causing said piston to aspirate discrete quantities of fluid into said syringe body through said needle; an injecting pawl, connected to said control rod, for engaging said plunger rack and moving said plunger rack in said stepwise forward direction and disengaging said plunger rack upon movement in said stepwise reverse direction; and a button for sliding the control rod parallel to the body centerline, movement in one direction causing ejection of medicament and movement in an opposite direction causing aspiration of fluid.