Patent ID: 7713244

Claim:
A prefilled syringe configured for the parenteral injection of a semi-solid formulation, comprising: a longitudinally continuous hollow element forming a reservoir, prefilled with a semi-solid preparation to be injected; a piston having a convex tip for pressing against the semi-solid preparation to be injected; a needle at one end of said hollow element, said needle having a supporting base, said semi-solid preparation being between said convex tip and said supporting base of said needle, said supporting base directly contacting an entirety of one end face of said hollow element, so that when the piston comes into direct contact with said base of said needle, an entire dose contained in said reservoir is injected; and a casing which houses said hollow element and provides mechanical resistance of the syringe, said hollow element and said needle being held fastened to each other at said base of said needle by said casing, wherein said casing forms a peripheral shell surrounding an external surface of said hollow element so that an internal surface of said casing directly contacts said external surface of said hollow element along an entirety of said external surface, and wherein said casing axially forces said hollow element directly against said base of said needle and strengthens said hollow element against radial pressures generated by said axial forces and generated by the ejection of said semi-solid formulation.