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PORTABLE APPARATUS FOR PERITONEAL DIALYSIS THERAPY

  • US 20100222735A1
  • Filed: 02/19/2010
  • Published: 09/02/2010
  • Est. Priority Date: 02/28/2005
  • Status: Abandoned Application
First Claim
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1. A peritoneal dialysis system, comprising:

  • a removable cassette defining first and second flexible pump chambers and first and second pressure sensing areas that are fluidly connected to the first and second pump chambers, respectively; and

    a peritoneal dialysis machine, comprisinga holding mechanism configured to secure the cassette within a cassette compartment of the peritoneal dialysis machine;

    first and second stepper motors connected to first and second piston heads, respectively, the first and second stepper motors being configured in a manner such that the first and second piston heads can be moved relative to the cassette to force peritoneal dialysis fluid out of and draw peritoneal dialysis fluid into the first and second pump chambers, respectively, during operation of the peritoneal dialysis system;

    first and second pressure sensors positioned to align with and to contact the first and second pressure sensing areas, respectively, of the cassette when the cassette is secured within the cassette compartment and the holding mechanism is activated; and

    a control unit connected to the first and second pressure sensors and adapted to change the operation of the peritoneal dialysis machine in response to changes in pressure sensed by the pressure sensors,wherein the first and second pressure sensors and the first and second pressure sensing areas are arranged so that the first pressure sensor measures a pressure of fluid in a first fluid passage between the first pump chamber and a patient during operation of the peritoneal dialysis system, and the second pressure sensor measures a pressure of fluid in a fluid passage between the second pump chamber and the patient during operation of the peritoneal dialysis system.

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