Patent ID: 8894618

Claim:
A safety syringe for injecting a patient with fluidic medication in a sterile manner, the syringe comprising: a plunger assembly having a piston and a shaft; a syringe body, the syringe body having a proximal portion and a distal portion, the piston and shaft partially disposed within the syringe body, the piston being traversable between a retracted position and a forward position within the syringe body, the piston and syringe body defining a sterile variable fluid chamber, the sterile variable fluid chamber disposed on a distal side of the piston with sterile gas disposed therein; a barrier attached to a distal portion of the syringe body and located distally from the variable fluid chamber, the barrier configured, before a needle is attached to the syringe, to prevent air transfer between an external environment and the sterile variable fluid chamber and to maintain sterility of the variable fluid chamber; and a detached needle assembly, having a needle end and a syringe end without a needle, attachable at the syringe end to the distal portion of the syringe body and operative when attached at the syringe end to the distal portion of the syringe body to puncture the barrier to allow fluidic medication to flow into or out of the sterile variable fluid chamber through the needle assembly.