Ambulatory infusion system with spring-pressurized reservoir
First Claim
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1. An ambulatory infusion system, comprising:
- a flexible liquid container for retaining a liquid for administration to a patient, said container including a flow port through which liquid is administered; and
means for pressurizing said liquid container comprising a pair of cooperating platen means between inner surfaces of which said liquid container is removably positionable, and means for biasing said platen means toward each other for effecting pressurization of liquid in said container,each of said platen means including opening means configured for removably cooperating with an associated opening means which effects separation of said platen means away from each other to facilitate replacement of said liquid container between said platen means, andremovable spacer means positionable to maintain said platen means in spaced apart relationship prior to use of said infusion system, said spacer means being removable for effecting pressurization of liquid in said container by said biasing means acting on said platen means.
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Abstract
An ambulatory infusion system includes a spring-pressurized reservoir to facilitate portable use of the system. The system includes a liquid-filled flexible container, and a pair of opposed platens between which the flexible container is removably positionable. Energy-storing, clip-like biasing springs act against the platens to urge them toward each other, thereby effecting pressurization of the liquid within the container. A tubing set of the system preferably includes a non-adjustable flow restrictor, which may be sized for relatively low flow rates to permit the system to be used for catheter patency maintenance.
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Citations
12 Claims
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1. An ambulatory infusion system, comprising:
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a flexible liquid container for retaining a liquid for administration to a patient, said container including a flow port through which liquid is administered; and means for pressurizing said liquid container comprising a pair of cooperating platen means between inner surfaces of which said liquid container is removably positionable, and means for biasing said platen means toward each other for effecting pressurization of liquid in said container, each of said platen means including opening means configured for removably cooperating with an associated opening means which effects separation of said platen means away from each other to facilitate replacement of said liquid container between said platen means, and removable spacer means positionable to maintain said platen means in spaced apart relationship prior to use of said infusion system, said spacer means being removable for effecting pressurization of liquid in said container by said biasing means acting on said platen means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An ambulatory infusion system, comprising:
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a flexible liquid container for retaining a liquid for administration to a patient, said container including a flow port through which liquid is administered; a tubing set connectable in fluid communication with the flow port of said liquid container through which liquid is administered to a patient through an associated catheter; and means for pressurizing said liquid container for effecting flow of liquid through said flow port and said tubing set, said pressurizing means comprising a pair of cooperating platen means arranged in generally parallel spaced apart relationship, with said liquid container removably positionable between inner surfaces thereof, said pressurizing means further comprising biasing spring means arranged to act against outer surfaces of said platen means for biasing said platen means toward each other to effect pressurization of liquid in said container, each of said platen means including opening mans configured for slidably, removably cooperating with an associated opening apparatus, whereby said apparatus acts on the opening means to effect separation of said platen means away from each other in opposition to said biasing spring means to facilitate replacement of said liquid container between said platen means, and removable spacer means positionable to maintain said platen means in spaced apart relationship prior to use of said infusion system, said spacer means being removable for effecting pressurization of the liquid in said container by said biasing means acting on said platen means. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification