Patent ID: 8012133

Claim:
System for injecting a fluid through or into the human skin, optionally by needle-free injection or by injection with a needle, comprising (i) an injection device comprising an ampoule with an ampoule body forming a chamber for receiving the fluid to be injected; an ampoule piston which is axially movable and sealingly guided in the chamber; an outlet of the ampoule located at a distant end of the ampoule for the fluid to be injected, wherein the outlet of the ampoule is in direct fluid communication with the chamber of the ampoule, wherein the ampoule is rounded in the region of the outlet of the ampoule and the rounded region of the ampoule forms a skin contact surface for the needle-less injection through or into the human skin; and at least one first coupling element of a coupling device which is arranged at the distal end of the ampoule on the ampoule body and configured for sealingly and reversibly attaching a needle attachment, and (ii) a needle attachment with a cannula part comprising a needle; and an adapter part proximally connected to the cannula part, wherein the adapter part has at least one second coupling element of the coupling device, the coupling device configured for sealing and reversible attachment on the ampoule of the injection device, wherein the needle attachment is constructed in two parts, wherein the needle attachment can be reversibly disassembled into the cannula part and the adapter part.