Single use syringe for two stroke procedures

摘要

A single use syringe is provided. The syringe includes features that cause the plunger rod to be locked with respect to the syringe barrel upon completion of a two stroke injection procedure, such as a drug reconstitution and injection sequence. The locking device may include barbs for engaging the syringe barrel and relatively long, proximally extending legs. The legs include barbs for engaging the syringe barrel and end portions for engaging the plunger rod. The plunger rod includes a recess defined by converging surfaces, the recess being displaced from the longitudinal axis thereof. The surfaces of the plunger rod define teeth that are engageable with the locking element.