Patent ID: 9084851
Filing Date: 2015-07-21
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 and having a passageway therethrough in fluid communication with the chamber, the barrel comprising a first pulsing element on the inside surface of the barrel adjacent the open proximal end; a plunger rod disposed within the barrel, the plunger rod 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, the thumb press comprising a locking element; 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 locking element 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.