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Method and apparatus for determining the quantity of oremic toxins removed by a hemodialysis treatment

  • US 5,725,773 A
  • Filed: 11/09/1995
  • Issued: 03/10/1998
  • Est. Priority Date: 11/12/1994
  • Status: Expired due to Term
First Claim
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1. A hemodialysis device for carrying out a dialysis treatment using a dialyzer, collecting a portion of used dialysis fluid as a fluid sample during said treatment, and carrying out a recirculating disinfection cycle separately from said dialysis treatment by circulating a disinfecting medium through a disinfection recirculation conduit branch,said device including a fresh fluid conduit with a fluid inlet arrangement at its upstream end, a used fluid conduit with a fluid outlet at its downstream end, and a fluid sampling and recirculating apparatus connected to said fluid outlet,wherein said fresh fluid conduit and said used fluid conduit are arranged and adapted to have a dialyzer connected therebetween during said dialysis .treatment with said fresh fluid conduit upstream from the dialyzer and said used fluid conduit downstream from the dialyzer,wherein said fluid sampling and recirculating apparatus comprises a drain conduit, a sampling and recirculating conduit with a first plug-in connector member at a downstream end thereof, a switching valve arrangement connected to said fluid outlet and selectively connecting said fluid outlet for fluid flow to said drain conduit or to said sampling and recirculating conduit in exclusive alternating succession, a control unit connected for control signal transmission to said valve arrangement, and a fluid sample receiving container with a second plug-in connector member adapted to be connectable with said first plug-in connector member to collect in said container said portion of said used dialysis fluid as said fluid sample during said dialysis treatment, andwherein said fluid inlet arrangement includes a third plug-in connector member adapted to be connectable with said first plug-in connector member to circulate said disinfecting medium through a recirculation conduit branch, which is formed by a combination of at least said valve arrangement, said sampling and recirculating conduit including said first plug-in connector member, and said fluid inlet arrangement including said third plug-in connector member.

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