A syringe assembly comprisng: a syringe comprising a syringe barrel having a proximal end and distal end, said distal end including an outlet opening; and a slidable flange positioned about the syringe barrel, said slidable flange comprising a flange member having a first end and a second end, an aperture extending through said flange member, said aperture configured for placement of the flange member about the syringe barrel, such that said first end of said flange member is positioned adjacent to a proximal end of the syringe barrel and said second end of said flange member extends toward a distal end of said syringe barrel in a pre-use position and wherein said aperture allows the second end of said flange member to slide along the length of the syringe barrel toward the proximal end thereof upon the application of a force thereto; and a locking member provided at the proximal end of the syringe barrel for locking the flange member into place to create a flange extending in a perpendicular direction with respect to the syringe barrel, wherein the locking of at least the sidewall portions of the flange member (2309 in place causes the first end and second end to extend in opposite directions in a perpendicular direction with respect to the syringe barrel to create the flange in a ready-to-use position, and wherein the locking member comprises an undercut portion at the proximal end of the syringe barrel, characterized in that: the flange member comprises an elongated member defined by sidewall portions connecting a first end and a second end and the aperture extending through the flange member is oval in shape, wherein a minor axis of the oval aperture provides points of contact for interference fit with walls of the syringe barrel. a syringe comprising a syringe barrel having a proximal end and distal end, said distal end including an outlet opening; and a slidable flange positioned about the syringe barrel, said slidable flange comprising a flange member having a first end and a second end, an aperture extending through said flange member, said aperture configured for placement of the flange member about the syringe barrel, such that said first end of said flange member is positioned adjacent to a proximal end of the syringe barrel and said second end of said flange member extends toward a distal end of said syringe barrel in a pre-use position and wherein said aperture allows the second end of said flange member to slide along the length of the syringe barrel toward the proximal end thereof upon the application of a force thereto; and a locking member provided at the proximal end of the syringe barrel for locking the flange member into place to create a flange extending in a perpendicular direction with respect to the syringe barrel, wherein the locking of at least the sidewall portions of the flange member (2309 in place causes the first end and second end to extend in opposite directions in a perpendicular direction with respect to the syringe barrel to create the flange in a ready-to-use position, and wherein the locking member comprises an undercut portion at the proximal end of the syringe barrel, characterized in that: the flange member comprises an elongated member defined by sidewall portions connecting a first end and a second end and the aperture extending through the flange member is oval in shape, wherein a minor axis of the oval aperture provides points of contact for interference fit with walls of the syringe barrel. the flange member comprises an elongated member defined by sidewall portions connecting a first end and a second end and the aperture extending through the flange member is oval in shape, wherein a minor axis of the oval aperture provides points of contact for interference fit with walls of the syringe barrel.