Solution pumping system including disposable pump cassette
First Claim
1. A method of compounding a liquid admixture using a pump cassette having a plurality of liquid inlets joined in fluid communication with a liquid outlet via a liquid flow path, and positive displacement pump means for pumping liquid from a selected one of said inlets to said outlet, said method comprising the steps of:
- providing an admixture container;
providing liquid tubing means for joining said liquid outlet and an upstreammost one of said liquid inlets in fluid communication with said admixture container;
compounding a liquid admixture in said admixture container by operating said pump means to pump at least one source solution from a downstream one of said liquid inlets through said liquid outlet and into said admixture container; and
selective recirculating said liquid admixture through said pump cassette.
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Accused Products
Abstract
An apparatus and method are disclosed for effecting compounding of parenteral admixture solutions, and recirculation with the admixture solution being formed. The apparatus includes a pump cassette configured for operative association with a pump driver, whereby one or more selected source solutions are delivered through the pump cassette to an associated admixture container. After pumping of each source solution, the present method contemplates that the admixture being formed is recirculated through the pump cassette, thereby diluting any source solution in the cassette and associated tubing. In this manner, the possible mixture of incompatible source solutions, resulting in formation of precipitate, is desirably avoided.
41 Citations
9 Claims
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1. A method of compounding a liquid admixture using a pump cassette having a plurality of liquid inlets joined in fluid communication with a liquid outlet via a liquid flow path, and positive displacement pump means for pumping liquid from a selected one of said inlets to said outlet, said method comprising the steps of:
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providing an admixture container; providing liquid tubing means for joining said liquid outlet and an upstreammost one of said liquid inlets in fluid communication with said admixture container; compounding a liquid admixture in said admixture container by operating said pump means to pump at least one source solution from a downstream one of said liquid inlets through said liquid outlet and into said admixture container; and selective recirculating said liquid admixture through said pump cassette. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for compounding an admixture solution, comprising:
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a pump cassette including a plurality of liquid inlets, a liquid outlet, a liquid flow path joining said inlets and said outlet in fluid communication, and positive displacement pump means for pumping liquid from a selected one of said inlets to said outlet; an admixture container for receiving at least one source solution from said pump cassette for forming an admixture solution; and recirculation means comprising means for joining said outlet and an upstreammost one of said inlets in fluid communication with said admixture container, whereby said pump means is selectively operable to alternately;
draw said admixture from said container and into said recirculation means for flow into said one inlet; and
pump liquid from said cassette through said recirculation means for flow into said admixture container. - View Dependent Claims (8, 9)
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Specification