Patent ID: 8491537
Filing Date: 2013-07-23
Classification: A61M

Abstract:
1. A flush syringe assembly comprising: a barrel including a side wall having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end including a distal wall with a tip extending distally therefrom having a passageway therethrough in fluid communication with said chamber, the barrel comprising a first pulsing element on the inside surface; a plunger rod disposed within the barrel and comprising a distal end, a proximal end, a plunger rod body extending from the distal end to the proximal end and a second pulsing element that engages with the first pulsing element to provide an engagement force that causes pulsatile movement of the plunger rod as it moves within the barrel in the distal direction; a thumb press slidably attached to the proximal end of the plunger rod; a pulse control element disposed between the thumb press and the proximal end of the plunger rod; and a stopper disposed at the distal end of the plunger rod to form a fluid-tight seal with the inside surface of the barrel, wherein the thumb press comprises a locking element that engages with the first pulsing element to lock the thumb press at least partially within the barrel when the stopper is in contact with the distal wall of the barrel and causes the pulse control element to exert a force on the plunger rod in a distal direction.