BACKSTOP DEVICE FOR A SYRINGE

摘要

A backstop device to prevent inadvertent withdrawal of a stopper from the open distal end of a syringe barrel. The backstop, mounted to a syringe flange, includes a pair of spaced apart plates located on either side of the flange. Both plates include respective apertures accessible through lead openings formed through the plates. The bottom aperture is formed for snug contact with the syringe barrel, while the upper aperture includes a ridge engageable with the interior of the syringe barrel adjacent the open distal end. The top aperture and ridge together present a smaller passageway than the diameter of the stopper, preventing inadvertent removal thereof. The backstop can be placed on the syringe regardless of the presence or absence of the plunger.