Pump with plural flow lines
First Claim
1. Apparatus for pumping fluid through plural flow lines comprisinga pump having an inlet and an outlet for transporting said fluid therethrough,first and second flow lines that are selectively connectable to said pump inlet via a first valve, andthird and fourth flow lines that are selectively connectable to said outlet via a second valve,said first and third lines being inflow and outflow lines, respectively,said second and fourth lines being connected to a fluid flow transfer device.whereby said pump can be used to selectively pump fluid through different flow paths.
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Accused Products
Abstract
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.
55 Citations
21 Claims
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1. Apparatus for pumping fluid through plural flow lines comprising
a pump having an inlet and an outlet for transporting said fluid therethrough, first and second flow lines that are selectively connectable to said pump inlet via a first valve, and third and fourth flow lines that are selectively connectable to said outlet via a second valve, said first and third lines being inflow and outflow lines, respectively, said second and fourth lines being connected to a fluid flow transfer device. whereby said pump can be used to selectively pump fluid through different flow paths.
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6. Apparatus for pumping fluid through plural flow lines, said apparatus being a single needle dialysis system, comprising
a pump having an inlet and an outlet for transporting said fluid therethrough, first and second flow lines that are selectively connectable to said pump inlet via a first valve, third and fourth flow lines that are selectively connectable to said outlet via a second valve, a needle connected to said first and said third flow lines, and a dialyzer connected to said second and fourth flow lines, whereby said pump can be used to selectively pump fluid through different flow paths.
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10. A method of pumping fluid through plural flow lines comprising
providing a pump having an inlet and an outlet for transporting fluid therethrough, first and second flow lines that are selectively connectable to said pump inlet via a first valve, and third and fourth flow lines that are selectively connectable to said outlet via a second valve, said first and third lines being inflow and outflow lines, respectively, said second and fourth lines being connected to a fluid flow transfer device, switching said first valve to connect one of said first and second flow lines to said inlet and to disconnect the other, switching said second valve to connect one of said third and fourth flow lines to said outlet and to disconnect the other, and pumping fluid through said pump.
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12. A method of pumping fluid through plural flow lines comprising
providing a pump having an inlet and an outlet for transporting fluid therethrough, first and second flow lines that are selectively connectable to said pump inlet via a first valve, and third and fourth flow lines that are selectively connectable to said outlet via a second valve, switching said first valve to connect one of said first and second flow lines to said inlet and to disconnect the other, switching said second valve to connect one of said third and fourth flow lines to said outlet and to disconnect the other, and pumping fluid through said pump, wherein said first and third lines are connected to remove blood from and return blood to a patient, said second and fourth lines are connected to a fluid flow transfer device, and one of said plurality of phases is a draw phase in which said first line is connected to said inlet, said fourth line is connected to said outlet, and untreated blood is pumped from said first line to said fourth line, thereby drawing blood from a patient.
Specification