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Fluid circuits, systems, and processes for extracorporeal blood processing

  • US 7,214,312 B2
  • Filed: 08/27/2003
  • Issued: 05/08/2007
  • Est. Priority Date: 07/12/2001
  • Status: Expired due to Term
First Claim
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1. A fluid circuit for a blood treatment system, comprising;

  • a blood filter or dialyzer with a blood circuit and a replacement fluid container with a replacement fluid circuit connected to said blood circuit for diluting blood;

    said blood circuit communicating with a blood side of said blood filter or dialyzer and having at least one patient access port connected to said replacement fluid container to define a recirculating path;

    a port on a non-blood side of said filter or dialyzer connectable to a source of replacement fluid;

    said recirculating path being entirely hermetically isolated from an outside of said fluid circuit except by a flow path through a membrane of said filter or dialyzer from said non-blood side to said blood side such that replacement fluid may be added to said replacement fluid container through said filter or dialyzer membrane and stored therein and a flow through said recirculating path may be established without making any connections or disconnections breaking said hermetic seal.

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