SINGLE-USE SYRINGE ALLOWING ASPIRATION

摘要

A syringe (10) comprises a barrel (12) having an open first end (16) and a second end (18) having an opening (20) for passage of fluid therethrough. Furthermore, the syringe comprises a plunger (14) adapted to be slidably received in the first end and which has a shaft (24), and a head (26) for sliding and sealing engagement with an internal wall of the barrel. In addition, at least one locking member (30) engages the barrel and the shaft, having at least one first tine (32) for selectively engaging the plunger and at least one second tine (34) for selectively engaging an internal wall of the barrel. At least one locking member is adapted to restrict outward movement of the plunger relative to the barrel, but has sufficient flexibility to allow limited outward movement of the plunger relative to the barrel, subsequent to inward movement of the plunger following outward movement of the plunger relative to the barrel.