Multi-liquid medicament delivery system with reflex valves
First Claim
1. A multi-liquid medicament delivery system, comprising:
- a syringe vessel having a wall and an injection port formed through the wall, the injection port being configured for engaging a needleless IV fitting;
a syringe plunger slidably disposed in the syringe vessel;
a barrier plunger slidably disposed in the syringe vessel between the syringe plunger and the injection port, the barrier plunger including a channel; and
valve means for blocking the channel of the barrier plunger, the valve means having an open configuration, wherein fluid communication through the channel is permitted, and a closed configuration, wherein no fluid communication through the channel is permitted.
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Accused Products
Abstract
A syringe for sequentially injecting a plurality of liquids into an intravenous (IV) infusion component that has a connector fitting includes a syringe vessel having a preferably needleless injection port that is engageable with the connector fitting of the IV component. A syringe plunger is slidably disposed in the syringe vessel, and at least one barrier plunger is slidably disposed in the syringe vessel between the injection port and the syringe plunger. The barrier plunger is formed with a pathway for fluid communication therethrough, and a valve is positioned in the pathway of the barrier plunger to block fluid communication through the pathway. A nipple extends inwardly from the injection port for opening the valve of the barrier plunger when the barrier plunger is urged against the nipple. A first liquid is disposed in the syringe vessel between the barrier plunger and the injection port and a second liquid is disposed in the syringe vessel between the two plungers. The syringe plunger can be advanced against the second liquid toward the injection port, thereby urging the barrier plunger against the first liquid to expel the first liquid through the injection port. As the syringe plunger is advanced further into the vessel, the barrier plunger is urged against the nipple of the injection port to open the valve, thereby establishing a pathway for fluid communication through the channel of the barrier plunger for expelling the second liquid through the injection port.
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Citations
20 Claims
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1. A multi-liquid medicament delivery system, comprising:
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a syringe vessel having a wall and an injection port formed through the wall, the injection port being configured for engaging a needleless IV fitting; a syringe plunger slidably disposed in the syringe vessel; a barrier plunger slidably disposed in the syringe vessel between the syringe plunger and the injection port, the barrier plunger including a channel; and valve means for blocking the channel of the barrier plunger, the valve means having an open configuration, wherein fluid communication through the channel is permitted, and a closed configuration, wherein no fluid communication through the channel is permitted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A syringe for sequentially injecting a plurality of liquids into an intravenous (IV) infusion component having a needleless connector fitting, comprising:
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a syringe vessel having an injection port engageable with the connector fitting of the IV component; a syringe plunger slidably disposed in the syringe vessel; a barrier plunger slidably disposed in the syringe vessel between the injection port and the syringe plunger, the barrier plunger being formed with a pathway for fluid communication through the barrier plunger; a valve positioned in the pathway of the barrier plunger to block fluid communication therethrough; and a nipple extending inwardly from the injection port for opening the valve of the barrier plunger when the barrier plunger is urged against the nipple. - View Dependent Claims (15, 16, 17, 18)
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19. A system for holding a plurality of liquids and sequentially expelling the liquids from the system into a needleless connector fitting, comprising:
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a syringe vessel having an injection port engageable with the connector fitting, the vessel holding a first liquid and a second liquid; a barrier plunger slidably disposed in the syringe vessel between the two liquids, the barrier plunger being formed with a pathway for fluid communication through the barrier plunger; a valve positioned in the pathway of the barrier plunger to block fluid communication therethrough; and a nipple extending inwardly from the injection port for opening the valve of the barrier plunger when the barrier plunger is urged against the nipple. - View Dependent Claims (20)
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Specification