Patent ID: 7998120
Filing Date: 2011-08-16
Classification: A61M,B29C,B29K,B29L

Abstract:
1. A prefilled syringe comprising: a shoulder portion provided with a luer tip arranged to be connected to an injection needle at a tip thereof; a barrel closed by the shoulder portion and having an open proximal end; and a gasket inserted adjacent to the open proximal end of the barrel in a fluid-tight manner while being freely slidable, a medication being contained inside the barrel, wherein the barrel has a multilayer structure in which an innermost layer and an outermost layer are both made of a polyolefin resin, and an intermediate layer is sandwiched by the innermost layer and the outermost layer and the intermediate layer is composed of at least one layer made of a resin excelling in an oxygen and/or water vapor barrier property, and further wherein the intermediate layer is formed up to a vicinity of a surface of the tip of the luer tip, and is not formed in a direction of the proximal end of the barrel from a proximal end of an initial insertion position of the gasket inserted in the barrel.