Patent ID: 9072840
Filing Date: 2015-07-07
Classification: A61M

Abstract:
1. A syringe plunger comprising: a) a proximal portion having an elongate cavity therein, a distal end, and a cutting element positioned at the distal end, wherein the cutting element comprises a body portion having a proximal end, a distal end, a side wall therebetween defining a longitudinal axis and a passageway therethrough, the distal end including a cutting edge and a plurality of raised distally projecting tapered cutting teeth each having a distal tip and distally converging edges, at least one tooth edge having a sharp side wall for cutting a stopper on a distal end of a hollow distal portion of the plunger, wherein the cutting teeth are separated by curved concave cutting edges running along the distal end of the body portion; b) a hollow distal portion of the plunger having the proximal portion inserted therein, wherein the distal portion is releasably connected to the proximal portion and capable of telescopic motion with respect to the proximal portion upon release of the releasable connection; and c) the stopper on the distal end of the hollow distal portion which seals the distal end of the distal portion, wherein the stopper is made of an elastomeric or thermoplastic material.