Non-vented vial access syringe
AssigneeCareFusion 303, Inc.
InventorsGeorge Michel MANSOUR, Tyler Devin PANIAN
Life of this patent
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Abstract
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.
Claims21
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;
- and
- a 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;
- and
- a gas passage extending from a proximal end of the tip to the distal end of the post.
A pre-filled syringe containing a prefill volume of a medical fluid, the 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;
- and
- a balloon disposed over the center tube and sealingly fixed to at least one of the center tube and the plunger tube, wherein the balloon and the at least one of the center tube and the plunger tube form a gas volume containing a gas;
- 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;
- and
- a gas passage extending from a proximal end of the tip to the distal end of the post,
- wherein the plunger is partially inserted into the barrel so as to form a liquid volume that contains the prefill amount of the medical fluid, and
- wherein the balloon is able to further expand such that the gas volume increases by at least the prefill volume so as to be able to accept gas displaced from a sealed vial when the prefill volume of medical liquid is injected into the vial.
A syringe for extracting a dose volume of a medical fluid from a sealed vial, the 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;
- and
- a balloon disposed over the center tube and sealingly fixed to the proximal end of the plunger tube, wherein the balloon and the plunger tube form a gas volume having a minimum gas capacity;
- 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;
- and
- a gas passage extending from a proximal end of the tip to the distal end of the post,
- wherein the syringe is fully inserted into the barrel such that a liquid volume formed between the plunger and barrel is approximately zero and the gas volume contains a quantity of gas that is greater than or equal to a maximum liquid capacity of the liquid volume plus the minimum gas capacity.
Dependencies are inferred from the claim text.