Method and apparatus for occlusion monitoring using pressure waveform analysis
First Claim
1. A method of monitoring for occlusion of a conduit in a flow circuit, said flow circuit comprising a first conduit having a flow therethrough, a fluid supply, a second conduit extending between said fluid supply and a first location on said first conduit at which said first and second conduits are fluidly connected, and a pump disposed between said first location and said fluid supply and interfacing with said second conduit, said method comprising the steps of:
- pumping a fluid from said fluid supply through said second conduit and into said first conduit using said pump;
monitoring a pressure in said first conduit at a second location; and
monitoring for an occlusion of any portion of said second conduit disposed between said fluid supply and said pump using said monitoring a pressure step.
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Accused Products
Abstract
A method and apparatus for occlusion monitoring in a flow circuit using pressure waveform analysis. The flow circuit includes a first conduit and a second conduit which fluidly interconnects a fluid supply with the first conduit. A pump is disposed in an intermediate portion of the second conduit. Monitoring of the pressure in the first conduit is used to identify any occlusions in that portion of the second conduit which is disposed between the pump and the fluid supply.
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Citations
40 Claims
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1. A method of monitoring for occlusion of a conduit in a flow circuit, said flow circuit comprising a first conduit having a flow therethrough, a fluid supply, a second conduit extending between said fluid supply and a first location on said first conduit at which said first and second conduits are fluidly connected, and a pump disposed between said first location and said fluid supply and interfacing with said second conduit, said method comprising the steps of:
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pumping a fluid from said fluid supply through said second conduit and into said first conduit using said pump; monitoring a pressure in said first conduit at a second location; and monitoring for an occlusion of any portion of said second conduit disposed between said fluid supply and said pump using said monitoring a pressure step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of monitoring for occlusion of a conduit in an extracorporeal blood processing system, said blood processing system comprising a blood supply, a blood processing device, a blood inlet conduit extending between said blood supply and said blood processing device, a blood inlet pump disposed between said blood supply and said blood processing device and interfacing with said blood inlet conduit at a first location, an anticoagulant supply, an anticoagulant conduit extending between said anticoagulant supply and a second location on said blood inlet conduit at which said blood inlet conduit and said anticoagulant conduit are fluidly connected, and an anticoagulant pump disposed between said second location and said anticoagulant supply and interfacing with said anticoagulant conduit, said method comprising the steps of:
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pumping blood from said blood supply to said blood processing device through said blood inlet conduit using said blood inlet pump; pumping anticoagulant from said anticoagulant supply through said anticoagulant conduit and into said blood inlet conduit using said anticoagulant pump; monitoring a pressure in said blood inlet conduit at a third location; and monitoring for an occlusion of any portion of said anticoagulant conduit located between said anticoagulant supply and said anticoagulant pump using said monitoring a pressure step. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A flow circuit, comprising:
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a first conduit; a fluid supply; a second conduit extending between said fluid supply and a first location on said first conduit at which said first and second conduits are fluidly connected; a pump disposed between said first location on said first conduit and said fluid supply and interfacing with said second conduit; a pressure sensing device interfacing with said first conduit at a second location; and means for monitoring for an occlusion of any portion of said second conduit disposed between said fluid supply and said pump, said means for monitoring comprising said pressure sensing device. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification