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Peritoneal dialysis machine with dual voltage heater circuit and method of operation

  • US 20080058712A1
  • Filed: 08/31/2006
  • Published: 03/06/2008
  • Est. Priority Date: 08/31/2006
  • Status: Abandoned Application
First Claim
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1. A portable peritoneal dialysis machine, comprisinga source of PD solution,a patient line for passing PD solution to and from the patient'"'"'s abdominal cavity,a controller for delivering a predetermined quantity of PD solution to the patient'"'"'s abdomen via the patient line,a heater for heating the PD solution before delivering it to the patient, the heater including at least two heating elements electrically connected in series via a center tap,a voltage detection circuit connected to an incoming power line for sensing whether the line voltage is 220 VAC or 110 VAC and producing an output indicative of line voltage,a switch circuit responsive to the voltage detection circuit output for applying 220 VAC across the heating elements in series or 110 VAC via the center tap through the elements in parallel, whereby approximately the same wattage is automatically produced by the heater under either 220 VAC or 110 VAC so that the PD solution is heated at approximately the same rate under either voltage.

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