Method for dialysis
First Claim
1. In the hemodialysis of blood by circulation of a dialysis solution in molecular exchange relation with blood to reduce the osmolality of the blood, the improvement comprising:
- initiating the hemodialysis with a dialysis solution having an osmolality of the order of the osmolality of the patient'"'"'s blood; and
thereafter varying the osmolality of the dialysis solution as a function of time to achieve the desired osmolality for the patient'"'"'s condition.
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Abstract
A method and apparatus for the hemodialysis of the blood of kidney failure patients. The concentration of the dialysis solution is initially selected so that the solution osmolality approximates the osmolality of the patient'"'"'s blood. The dialysis solution concentration is then reduced linearly as a function of time as the dialysis is carried out. The conductivity of the dialysis solution is measured and compared with high and low limit references. If the conductivity is outside the limits, an alarm is given and the concentration of the dialysis solution is held constant. A timer controls a proportional pumping means to reduce the concentration of the dialysis solution and concurrently reduces the conductivity reference limits for the alarm.
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Citations
6 Claims
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1. In the hemodialysis of blood by circulation of a dialysis solution in molecular exchange relation with blood to reduce the osmolality of the blood, the improvement comprising:
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initiating the hemodialysis with a dialysis solution having an osmolality of the order of the osmolality of the patient'"'"'s blood; and thereafter varying the osmolality of the dialysis solution as a function of time to achieve the desired osmolality for the patient'"'"'s condition. - View Dependent Claims (2, 3, 4)
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5. In the hemodialysis of blood by circulation of a dialysis solution in molecular exchange relation with blood to reduce the osmolality of the blood, the improvement comprising:
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mixing a concentrated dialysis solution with water for circulation of the dialysis solution mixture through a dialyzer; establishing an initial concentration of said dialysis solution mixture having an osmolality of the order of the osmolality of the patient'"'"'s blood; reducing the concentration of the dialysis solution mixture as a function of time; measuring the conductivity of the dialysis solution mixture; establishing initial upper and lower conductivity limits; reducing said upper and lower conductivity limits as a function of time; comparing the dialysis solution mixture conductivity with said upper and lower conductivity limits; and initiating an alarm if the dialysis solution mixture conductivity is below the lower limit or above the upper limit. - View Dependent Claims (6)
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Specification