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PERITONEAL DIALYSIS MACHINE

  • US 20090281484A1
  • Filed: 07/21/2009
  • Published: 11/12/2009
  • Est. Priority Date: 10/28/2003
  • Status: Active Grant
First Claim
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1. A peritoneal dialysis machine comprising:

  • a housing;

    a mechanically actuated piston head extending from a pump actuator housed by the housing, the mechanically actuated piston head positioned to extend towards and away from a fluid pumping cassette, the fluid pumping cassette coupled operably to the housing such that a flexible membrane of the fluid pumping cassette faces the piston head;

    a pressure sensor positioned by the housing adjacent to the mechanically actuated piston head so as to sense a pressure of a medical fluid moved by the mechanically actuated piston head within the fluid pumping cassette; and

    a vacuum chamber formed about the mechanically actuated piston head, the vacuum chamber holding a vacuum that sucks the flexible membrane of the fluid pumping cassette onto the mechanically actuated piston head as the mechanically actuated piston head extends away from the fluid pumping cassette.

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