Dialysis solution mixing system
First Claim
1. A blending system for preparation of dialysis solution from water and dry chemicals comprising:
- (a) a dialysis solution tank;
(b) diluent means for supplying water into said tank;
(c) slurry means for conveying liquid from said tank to a source of dry chemicals, said slurry means including a chamber defining means for directing water onto said chemicals within said source container;
(d) said chamber defining means being constructed and arranged such that water is forced through a plurality of perforations in a plate forming the bottom of said chamber defining means so as to form a slurry of chemicals therebelow;
(e) suction means for conveying said slurry from said source to said dialysis solution tank including a hollow tubular pickup tube and a suction source;
(f) dialysis solution tank mixing means for mixing said chemicals within said tank; and
(g) delivery means for delivering mixed dialysis solution from said tank to a dispensing station.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and process for preparation of dialysis solution from dry chemicals and water on a large scale batch basis. The required amount of water is metered into a dialysis solution tank. Water from the tank is pumped into a spray head which is positioned above a shipping drum containing predetermined amounts of chemicals. Water rains down on the chemicals dissolving and/or entraining the same and the resulting slurry is returned to the dialysate tank as a slurry by means of a pickup wand and suction source. The liquid and chemicals in the dialysis solution tank are continually cycled until all the chemicals in the drum have been removed. Typically, an additional drum containing other kinds of chemicals is then added to the dialysis solution tank in the same manner. Circulation of the solution is continued within the tank until a fully uniform solution results. Dialysis solution in the tank is then filtered and checked for conductivity prior to its direct use in hemodialysis or dilution in a conventional proportioning system.
59 Citations
25 Claims
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1. A blending system for preparation of dialysis solution from water and dry chemicals comprising:
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(a) a dialysis solution tank; (b) diluent means for supplying water into said tank; (c) slurry means for conveying liquid from said tank to a source of dry chemicals, said slurry means including a chamber defining means for directing water onto said chemicals within said source container; (d) said chamber defining means being constructed and arranged such that water is forced through a plurality of perforations in a plate forming the bottom of said chamber defining means so as to form a slurry of chemicals therebelow; (e) suction means for conveying said slurry from said source to said dialysis solution tank including a hollow tubular pickup tube and a suction source; (f) dialysis solution tank mixing means for mixing said chemicals within said tank; and (g) delivery means for delivering mixed dialysis solution from said tank to a dispensing station. - View Dependent Claims (2, 3, 4, 5)
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6. A blending system for preparation of hemodialysis solution from a diluent of water and from dry chemicals comprising:
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(a) a dialysis solution tank; (b) diluent means for supplying water into said tank; (c) level sensing means within said tank for determining when said tank is charged with diluent and for controlling the flow of diluent into said tank; (d) delivery means for conveying liquid within said tank to a source of a predetermined quantity of dry chemicals having the amount of chemicals required to make up the hemodialysis solution; (e) said delivery means including solubilizing means to direct said diluent onto said dry chemicals so as to form a slurry of chemicals and diluent; (f) level sensing means for controlling the introduction of diluent into said source of dry chemicals; (g) pickup wand means for conveying said slurry and diluent from said chemical source to said dialysis solution tank; (h) dialysis solution tank mixing means for receiving and mixing said chemicals within said tank from said pickup wand means; and (i) dialysis solution delivery means for delivering mixed dialysis solution from said dialysis solution tank for dialysis including filters, pressure sensors, monitors for determining the concentration of said dialysis solution and valves controlled by outputs of said sensors and monitors.
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7. A system for preparing dialysis solution from diluent water and dry chemicals comprising:
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(a) a dialysis solution tank; (b) diluent means for supplying water into said tank; (c) a source of dry chemicals; (d) delivery means for conveying diluent within said tank to said source of chemicals;
said delivery means including a spray head means for directing a spray of diluent into said source of dry chemicals so as to cause the chemicals to dissolve and form a slurry;(e) pickup wand means for conveying said slurry within said chemical source to said dialysis solution tank; (f) dialysis solution tank mixing means for receiving said slurry from said pickup wand means and for mixing same within said tank; and (g) dialysis solution delivery means for delivering mixed dialysis solution from said dialysis solution tank for use in dialysis.
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8. A system for preparation of hemodialysis solution from water and chemicals comprising:
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(a) a dialysis solution tank including a water inlet and drain outlet; (b) diluent means for supplying water into said tank through said water inlet; (c) delivery means for conveying water within said tank through said drain outlet and into a container of dialysis solution chemicals so as to solubilize and entrain said chemicals in a slurry; (d) wand means for conveying said slurry within said container into said dialysis solution tank; (e) dialysis solution tank mixing means for mixing said slurried chemicals within said dialysis solution tank; and (f) dialysis solution delivery means for delivering mixed dialysis solution from said dialysis solution tank for use in dialysis. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for preparing hemodialysis solution from a diluent of water and from dry chemicals comprising:
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(a) metering diluent into a dialysis solution tank; (b) conveying said diluent from said tank onto a source of a predetermined quantity of dry chemicals having the amount of chemicals required to make up the hemodialysis solution; (c) conveying the solubilized and dispersed chemicals from said source to said dialysis solution tank; (d) mixing said diluent and chemicals within said dialysis solution tank; (e) continuing said conveying of diluent which now contains chemicals from said tank to said chemical source and said slurried chemicals to said dialysis solution tank until all of said chemicals have been conveyed to said tank; and (f) mixing said chemicals within said tank until a uniform concentration is obtained therewithin.
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19. A method for preparing hemodialysis solution from a diluent of water and from dry chemicals comprising:
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(a) filling a dialysis solution tank with a predetermined amount of water; (b) conveying said water from said tank into a predetermined quantity of dry chemicals within a container on top of said chemicals; (c) conveying the solutilized and dispersed chemicals within said container to said dialysis solution tank continuously during the conveyance of water and water containing chemicals to said container; (d) discontinuing said conveyance of water and water containing chemicals to said container when all the chemicals within said container has been removed; and (e) mixing said chemicals within said dialysate tank until a uniform chemical concentration is achieved. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification