pH AND BUFFER MANAGEMENT SYSTEM FOR HEMODIALYSIS SYSTEMS
First Claim
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1. A system for infusing a buffer into a dialysate, comprising:
- a dialysate flow loop for circulating a dialysate through a dialyzer, wherein acid or base equivalents are added to the dialysate during operation of the dialysate flow loop;
a urea sensor that measures or allows for the calculation of urea content of the dialysate in at least one portion of the dialysate flow loop;
an infusate system configured to add a bicarbonate buffer component or unbuffered sodium bicarbonate to the dialysate; and
a controller for controlling an amount of the bicarbonate buffer component or unbuffered sodium bicarbonate for addition to the dialysate to generate a predetermined total bicarbonate buffer concentration in the dialysate entering the dialyzer.
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Abstract
Systems and methods for managing the pH of a dialysate fluid during hemodialysis therapy. The systems and methods adjust dialysate pH and buffer concentration to generate a predetermined total bicarbonate buffer concentration in a dialysate entering a dialyzer.
103 Citations
33 Claims
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1. A system for infusing a buffer into a dialysate, comprising:
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a dialysate flow loop for circulating a dialysate through a dialyzer, wherein acid or base equivalents are added to the dialysate during operation of the dialysate flow loop; a urea sensor that measures or allows for the calculation of urea content of the dialysate in at least one portion of the dialysate flow loop; an infusate system configured to add a bicarbonate buffer component or unbuffered sodium bicarbonate to the dialysate; and a controller for controlling an amount of the bicarbonate buffer component or unbuffered sodium bicarbonate for addition to the dialysate to generate a predetermined total bicarbonate buffer concentration in the dialysate entering the dialyzer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 18, 19, 20, 21, 22, 23, 26, 27, 28, 29)
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13. A system for modifying a pH of a dialysate, comprising:
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a dialysate flow loop for circulating a dialysate through a dialyzer, wherein acid or base equivalents are added to the dialysate during operation of the dialysate flow loop; a pH-buffer management system for adding or generating a pH-buffer modifying solution to the dialysate, wherein the pH-buffer management solution has a different pH from the dialysate; and a controller for calculating an amount of the pH-buffer modifying solution for addition to the dialysate to adjust the dialysate to be of a predetermined pH and bicarbonate buffer concentration. - View Dependent Claims (14, 15, 16, 17, 24, 25, 30, 31, 32, 33)
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Specification