Syringe With Plunger Rod Having a Flexible Portion

摘要

A syringe assembly including a plunger rod having a first end, a second end, and a rod portion extending therebetween, wherein at least a portion of the rod portion is flexible is disclosed. The flexible portion of the rod portion allows a stopper to be moved between a first position and a second position within a syringe barrel while the overall length of the syringe assembly remains the same throughout the movement between the first position and the second position. In another embodiment, a syringe assembly including a restraining member adapted to communicate with the flexible portion of the rod portion such that movement of the first end of the plunger rod in a first direction actuates movement of the second end of the plunger rod in a second direction different than the first direction is disclosed.

主权项

1. A syringe assembly, comprising:
a syringe barrel having a first end, a second end, and a sidewall extending therebetween and defining a chamber having an interior; a stopper slidably disposed within the interior of the chamber of the syringe barrel, the stopper sized relative to the interior of the chamber of the syringe barrel to provide sealing engagement with the sidewall of the syringe barrel; and a plunger rod having a first end, a second end, and a rod portion extending therebetween, wherein at least a portion of the rod portion is flexible, wherein the second end of the plunger rod is engaged with the stopper such that movement of the first end of the plunger rod in a first direction moves the stopper in a second direction between a first position in which the stopper is located a first distance from the first end of the syringe barrel, and a second position in which the stopper is located a second distance from the first end of the syringe barrel, the second direction being different than the first direction and the second distance being different than the first distance, and wherein the overall length of the syringe assembly is the same when the stopper is in the first position and the second position.