Non-vented vial access syringe

摘要

A syringe includes a plunger having a plunger tube with proximal and distal ends, a center tube with a center passage that extends within the plunger tube, and a balloon disposed over the center tube and sealingly fixed to at least one of the center tube and the plunger tube. The syringe also includes a barrel having a barrel tube having proximal and distal ends and an interior configured to accept a portion of the plunger, a tip fixedly coupled to the proximal end of the barrel tube, a post fixedly attached to the tip and extending within the barrel tube toward the distal end, the tip configured to partially extend into the center passage of the plunger, and a gas passage extending from a proximal end of the tip to the distal end of the post.

主权项

1. A syringe comprising:
a plunger comprising:
a plunger tube having proximal and distal ends;a center tube coupled to the proximal end of the plunger tube and extending within the plunger tube toward the distal end, the center tube having a center passage; anda balloon disposed over the center tube and sealingly fixed to at least one of the center tube and the plunger tube; and a barrel comprising:
a barrel tube having proximal and distal ends and an interior configured to accept a portion of the plunger;a tip fixedly coupled to the proximal end of the barrel tube;a post fixedly attached to the tip and extending within the barrel tube toward the distal end, the tip configured to partially extend into the center passage of the plunger; anda gas passage extending from a proximal end of the tip to the distal end of the post.