Patent ID: 9115709
Filing Date: 2015-08-25
Classification: A61M,F04B,G01M,G05D

Abstract:
1. An apparatus for pumping fluid comprising: a housing enclosing a pump drive assembly for actuating at least one pump on a removable fluid pumping cassette, when the pumping cassette is installed in the housing; a door connected to the housing for enclosing the installed cassette in the housing upon closure of the door; the pump drive assembly comprising a mating block configured for operative association with the installed cassette; the mating block configured to permit a sealing engagement with the installed cassette upon closure of the door; wherein the door includes a movable compression plate configured to move toward the cassette and exert a compressive force on the installed cassette against the mating block when the door is in a closed position; and wherein the door further comprises an expandable bladder adjacent the compression plate and configured to be pressurized against the compression plate to generate a compressive force on the installed cassette; and further comprising a controller configured to control expansion of the bladder and to receive a signal from one or more sensors to detect whether the door is in a closed position.