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Hemodialysis device

  • US 4,683,053 A
  • Filed: 05/07/1985
  • Issued: 07/28/1987
  • Est. Priority Date: 05/08/1984
  • Status: Expired due to Fees
First Claim
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1. A hemodialysis apparatus comprising:

  • a dialyzer having a membrane, a first chamber, and a second chamber separated from said first chamber by said membrane, said first chamber for coupling into a dialyzing liquid path, and said second chamber for coupling into a blood path;

    a dialyzing liquid source;

    a suction pump disposed in the dialyzing liquid path downstream from the dialyzer for controlling transmembrane pressure in the dialyzer;

    a restrictor means disposed in the dialyzing liquid path upstream of the dialyzer;

    a changeover valve having a first outlet, a second outlet, and an inlet coupled to receive dialyzing liquid downstream from said suction pump;

    a discharge port coupled to said first outlet;

    volume-measuring means for measuring volume of ultrafiltrate liquid;

    means for determining the transmembrane pressure in the dialyzer;

    control means, said control means being coupled at least to the transmembrane pressure determining means for controlling the suction pump in response to transmembrane pressure; and

    a return line coupled to said second outlet of said first changeover valve and connected to the dialyzing liquid source for returning the dialyzing liquid to the dialyzing liquid source in a closed circuit.

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