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US 4,664,891 AGranted
Dialysis solution preparation from prepackaged dry chemicals
AssigneeRenal Systems, Inc.
InventorsLouis C. Cosentino, Wayne I. Nelson
Life of this patent
Estimating the term…
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AssigneeRenal Systems, Inc.
InventorsLouis C. Cosentino, Wayne I. Nelson
Estimating the term…
A system and process for preparation of dialysis concentrate solution from dry chemicals and water. The source of hemodialysis chemicals for a batch is a drum selectively filled with dry chemicals such that an inner core region therewithin is loaded with chemicals which slurry and dissolve the least readily. The required amount of water is metered into a mix tank. Water is pumped from the tank into a spray head fitted over the selectively filled drum. Water is injected onto the chemicals within the inner core region by the use of a nozzle having a narrow spray angle. The chemicals within the inner core region are preferentially dissolved or slurried before the other chemicals within the drum. The slurried and dissolved chemicals are removed from the drum by a suction wand and are entirely solubilized in the tank. Cycling of fluid continues from the drum to the tank and vice versa until all of the chemicals in the drum have been removed. Circulation of the fluid is continued until a uniform solution results. The dialysis concentrate solution is filtered and checked for conductivity prior to dilution in a conventional proportioning system for ultimate use in hemodialysis.
A prepackaged container of all of the dry chemicals needed to prepare an aqueous solution by introduction of water into said container, the prepackaged container including at least one chemical which when admixed with pure water less readily forms a solubilized mixture and slurry than other chemicals within the container, the prepackaged container consisting of:
A prepackaged container of dry hemodialysis chemicals for use in preparing hemodialysis solution by the addition of water to said container, the prepackaged container comprising:
A prepackaged container of dry hemodialysis chemicals for use in preparing hemodialysis solution by the addition of water to said container, the prepackaged container comprising:
A prepackaged container filled with hemodialysis chemicals for use in preparing hemodialysis solution from a water injection, suction removal system which injects water into said container and suctions the resulting solution out of said container, the prepackaged container comprising:
A prepackaged container filled with hemodialysis chemicals for use in preparing hemodialysis solution employing a water injection dialysis solution mixing system which injects water into said container, the prepackaged container comprising:
A blending system for preparation of hemodialysis solution from water and dry chemicals comprising:
A method for preparing hemodialysis solution from a diluent of water and from dry chemicals comprising:
Dependencies are inferred from the claim text.