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METHODS AND APPARATUSES FOR DETECTING OCCLUSIONS IN AN AMBULATORY INFUSION PUMP

  • US 20120215199A1
  • Filed: 04/18/2012
  • Published: 08/23/2012
  • Est. Priority Date: 10/29/1998
  • Status: Active Grant
First Claim
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1. A method of detecting an occlusion in an infusion pump having a reservoir and a drive mechanism that includes a motor and one or more drive train components for infusing fluid from the reservoir into a body of a user, the method comprising:

  • during delivery of a current pulse of infusion fluid, periodically measuring the amount of force that is applied to a drive train component to obtain a series of measurements;

    determining a peak value of the series of measurements;

    selecting a second value within the series of measurements later than the peak value;

    calculating a difference between the peak value and the second value; and

    declaring an occlusion has occurred if the difference exceeds a threshold value.

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