A syringe apparatus and process for using the same is provided, the syringe apparatus having a barrel, a plunger movable within the barrel, a needle assembly attached to an end of the barrel and having a passageway therethrough, a deformable base positioned within the barrel, flexible supports included...http://www.google.es/patents/US5613952?utm_source=gb-gplus-sharePatente US5613952 - Safety syringe
