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Monitoring the operating health of a force sensor in a fluid infusion device

  • US 8,628,510 B2
  • Filed: 12/22/2010
  • Issued: 01/14/2014
  • Est. Priority Date: 12/22/2010
  • Status: Active Grant
First Claim
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1. A method of operating a fluid infusion device comprising a drive motor assembly and a force sensor associated with the drive motor assembly, the method comprising:

  • determining a measure of actuation force imparted to the force sensor during a fluid delivery action of the drive motor assembly, where the drive motor assembly regulates delivery of fluid by the fluid infusion device;

    comparing the measure of actuation force against a range of valid values that represents normally expected measures of actuation forces; and

    when the measure of actuation force is outside the range of valid values, detecting that an occlusion is present in a fluid flow path and initiating corrective action for the fluid infusion device,wherein initiating the corrective action includes;

    adjusting a threshold value of the range of valid values for the actuation force; and

    allowing the fluid infusion device to continue fluid delivery for a set number of fluid delivery actions.

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