Cobe Laboratories, Inc.

Lawrence L Leppert

Frank Corbin, Iii

Donn D Lobdell

George J Eilers

Keith J Manica

Steven H Johnson

Douglas P Miller

Lori A Truitt

Blood from a patient is treated extracorporeally by any selected one of a plurality of predetermined treatments. Each of the treatments involves the flow of blood from the patient into a primary chamber of a filtration unit, past a semipermeable membrane located in the filtration unit which separates the primary chamber from a secondary chamber of the filtration unit, out the filtration unit and back to the patient. A replacement fluid is selectively and controllably added to the blood, as required for the selected treatment. A secondary fluid is controllably and selectively introduced into the secondary chamber of the filtration unit for controllably collecting material passing across the semipermeable membrane from the blood or for supplying material to pass across the semipermeable membrane into the blood as required for the selected treatment. Materials are removed from the secondary chamber and collected in accordance with the selected treatment. Upon selection of one of the plurality of extracorporeal blood treatments available, the rates of blood flow, fluid flow and fluid collection during the extracorporeal treatment are automatically determined, established and monitored in accordance with the selected treatment. An apparatus which automatically performs and monitors the selected treatment is also described.

Technique for extracorporeal treatment of blood

Blood from a patient is treated extracorporeally by any selected one of a plurality of predetermined treatments. Each of the treatments involves the flow of blood from the patient into a primary chamber of a filtration unit, past a semipermeable membrane located in the filtration unit which separates the primary chamber from a secondary chamber of the filtration unit, out the filtration unit and back to the patient. A replacement fluid is selectively and controllably added to the blood, as required for the selected treatment. A secondary fluid is controllably and selectively introduced into the secondary chamber of the filtration unit for controllably collecting material passing across the semipermeable membrane from the blood or for supplying material to pass across the semipermeable membrane into the blood as required for the selected treatment. Materials are removed from the secondary chamber and collected in accordance with the selected treatment. Blood leaks into the secondary chamber are automatically detected and the rates of blood and fluid flow automatically adjusted in response thereto. An apparatus which automatically performs and monitors the selected treatment is also described.

Apparatus for pumping fluid through plural flow lines comprising a pump having an inlet and an outlet for transporting the fluid therethrough, first and second flow lines that are selectively connectable to the pump inlet via a first valve, and third and fourth flow lines that are selectively connectable to the outlet via a second valve, whereby the pump can be used to selectively pump fluid through different flow paths.

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Littleton, CO, United States of America

Lawrence L Leppert