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    MEDICAL INFUSION SYSTEM AND METHOD OF OPERATION
    5.
    发明专利
    MEDICAL INFUSION SYSTEM AND METHOD OF OPERATION 未知

    公开(公告)号：CA1148824A

    公开(公告)日：1983-06-28

    申请号：CA371814

    申请日：1981-02-26

    Applicant: ANDROS INC

    Inventor： JASSAWALLA JAL S ,  CHEN HERBERT

    IPC: A61M1/00 ,  A61M5/142 ,  F04B43/00 ,  F04B43/08 ,  A61M5/14

    Abstract: MEDICAL INFUSION SYSTEM AND METHOD OF OPERATION A medical infusion system is described emploting a pump and cassette combination for conducting fluid or semi-solids from an upstream portion to a downstream portion of the system. The cassette includes a rigid enclosure defining a pumping cavity and has a window with a diaphragm spanning the window. The diaphragm is engaged by an actuator on the pump for varying the volume of the pumping cavity, Restrictors at the upstream and downstrem portions close off and open, respectively, the flow into and out of the pumping cavity in a sequence related to the actuator movement such that the pumping cavity alternately is filled and substantially emptied. To minimize the detrimental effects of air in the pumping cavity: 1) the actuator is operated to substantially increase the volume of the pumping cavity prior to opening of the upstream portion; and 2) the actuator is operated to reduce the volume of the pumping cavity to a residual volume of less than about 0.07 ml subsequent to closing of the upstream portion and opening of the downstream portion.

    MEDICAL INFUSION SYSTEM
    6.
    发明专利
    MEDICAL INFUSION SYSTEM 未知

    公开(公告)号：CA1148431A

    公开(公告)日：1983-06-21

    申请号：CA371831

    申请日：1981-02-26

    Applicant: ANDROS INC

    Inventor： JASSAWALLA JAL S ,  CHEN HERBERT

    IPC: A61M1/00 ,  A61M5/142 ,  F04B43/00 ,  A61M5/14

    Abstract: MEDICAL INFUSION SYSTEM A medical infusion system is described employing a pump and cassette combination for conducting fluid or semisolids from an upstream portion to a downstream portion of the system. The cassette includes a rigid enclosure defining a pumping chamber and has a window with a diaphragm spanning the window. The diaphragm is engaged by means on the pump for varying the volume of the pumping chamber. The configuration of the cassette is such that the outlet for the pumping chamber is located at the top of the pumping cavity and the internal configuration of the cavity causes gas bubbles to migrate to the outlet opening. A passage communicates between the outlet opening and a location proximate to the lower portion of the cassette.

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