Pumping cassette
First Claim
Patent Images
1. A pump cassette comprising:
- a housing having a top plate forming a first face of the housing, a bottom plate forming an opposing second face of the housing, and a midplate positioned between the top plate and the bottom plate,the housing comprising;
a main flow path fluidly connected to at least one fluid inlet line and at least one fluid outlet line;
at least one reciprocating pressure displacement membrane pump within said housing, said pump being arranged to pump a first fluid from said fluid inlet line to said fluid outlet line via the main flow path;
a fluid port communicating through the first face of the housing with a second flow path in the housing; and
at least one metering pump, said metering pump being arranged to pump a second fluid through the fluid port to the second flow path, whereinsaid second flow path is in fluid communication with said fluid outlet line.
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Abstract
A pump cassette is disclosed. The pump cassette includes a housing having at least, one fluid inlet line and at least one fluid outlet line. The cassette also includes at least one reciprocating pressure displacement membrane pump within the housing. The pressure pump pumps a fluid from the fluid inlet line to the fluid outlet line. A hollow spike is also included on the housing as well as at least one metering pump The metering pump is fluidly connected to the hollow spike on the housing and to a metering pump fluid line. The metering pump fluid line is fluidly connected to the fluid outlet line.
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Citations
22 Claims
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1. A pump cassette comprising:
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a housing having a top plate forming a first face of the housing, a bottom plate forming an opposing second face of the housing, and a midplate positioned between the top plate and the bottom plate, the housing comprising; a main flow path fluidly connected to at least one fluid inlet line and at least one fluid outlet line; at least one reciprocating pressure displacement membrane pump within said housing, said pump being arranged to pump a first fluid from said fluid inlet line to said fluid outlet line via the main flow path; a fluid port communicating through the first face of the housing with a second flow path in the housing; and at least one metering pump, said metering pump being arranged to pump a second fluid through the fluid port to the second flow path, wherein said second flow path is in fluid communication with said fluid outlet line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 19)
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11. A pump cassette comprising:
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a housing having a top plate forming a first face of the housing, a bottom plate forming an opposing second face of the housing, and a midplate positioned between the top plate and the bottom plate, the housing comprising; a main flow path fluidly connected to at least one fluid inlet line and at least one fluid outlet line; at least one reciprocating pressure displacement membrane pump within said housing, said pump being arranged to pump a first fluid from said fluid inlet line to said fluid outlet line via the main flow path; a second flow path within said housing, said second flow path being in fluid communication with the first flow path and comprising; a metering membrane pump; a second fluid inlet line for pumping a volume of a second fluid into said fluid outlet line, said second fluid inlet line entering the housing through the first face of said housing; a fluid port in fluid communication of said second fluid into with said second fluid inlet line; and an air vent to in fluid communication with said second fluid inlet line, wherein said metering membrane pump is configured to infuse a quantity of a second liquid via the fluid port into the main flow path. - View Dependent Claims (12, 17, 20)
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13. A blood pump cassette comprising:
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a cassette housing having a top plate forming a first face of the housing, a bottom plate forming an opposing second face of the housing, and a midplate positioned between the top plate and the bottom plate, the housing comprising at least one blood inlet line for pumping blood from a patient and one blood outlet line for pumping blood to a dialyzer; at least two reciprocating pressure displacement membrane pumps within said housing, said pumps being arranged to pump blood from a patient to the dialyzer; at least two valves, said valves comprising; a valve housing; and a membrane, said membrane dividing said valve housing into two chambers, an actuation chamber and a liquid chamber, said actuation chamber having at least one port and said liquid chamber having at least two ports, and wherein said liquid chamber comprises a substantially smooth surface; and a heparin administering system within the cassette housing comprising; a membrane-based pump; a heparin inlet line for pumping a volume of heparin into the blood outlet line; a fluid port through the first face of the cassette housing for fluid communication of between a source of heparin and said heparin inlet line; and an air vent and filter fluidly connected to said heparin inlet line. - View Dependent Claims (14, 15, 18, 21, 22)
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Specification