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Water purification using reverse osmosis device for formulation of medical solution

  • US 5,951,863 A
  • Filed: 06/20/1994
  • Issued: 09/14/1999
  • Est. Priority Date: 08/20/1990
  • Status: Expired due to Fees
First Claim
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1. Hemodialysis system for treating a patient comprising:

  • a. reverse osmosis device for purifying water from a source and having;

    1. input means for coupling to the source of water;

    2. first reverse osmosis means being in spiral flow fluid communication with said input means for purification of at least a first portion of the water from the source, said first reverse osmosis means constructed and arranged to provide at least a first reverse osmosis multilayer assembly spirally rolled about a first axis so as to provide a generally spiral flow path for the water from the source; and

    3. second reverse osmosis means being in spiral flow fluid communication with said first reverse osmosis means to receive the purified first portion of water for further purification of at least a second portion of the water, said second reverse osmosis means constructed and arranged to provide at least a second reverse osmosis multilayer assembly spirally rolled about a second axis so as to provide a generally spiral flow path for at least some of the purified portion of water from the first reverse osmosis means; and

    b. means for supplying a predetermined amount of drug;

    c. means for mixing the purified second portion of the water with the drug to provide a dialysate solution; and

    d. means for delivering the dialysate solution to a hemodialyzer.

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