×

Method of controlling an implantable medical device with optimized pump drive

  • US 20060047367A1
  • Filed: 10/27/2005
  • Published: 03/02/2006
  • Est. Priority Date: 04/22/2002
  • Status: Abandoned Application
First Claim
Patent Images

1. A method for reducing energy consumption in an implantable infusion device having a stepper motor driving an infusion pump and powered by a power source having a power source voltage, said stepper motor being driven by drive pulses, comprising:

  • receiving an instruction to infuse a therapeutic substance;

    measuring said power source voltage;

    calculating a duty cycle of said drive pulses for delivery within a substantially fixed drive interval to operate said stepper motor;

    increasing said duty cycle of said drive pulses within said substantially fixed drive interval to operate said stepper motor as said power source voltage decreases; and

    infusing said therapeutic substance when said stepper motor operates said infusion pump to meter said therapeutic substance.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×