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Methods and apparatuses for detecting occlusions in an ambulatory infusion pump

  • US 9,107,999 B2
  • Filed: 09/17/2014
  • Issued: 08/18/2015
  • Est. Priority Date: 10/29/1998
  • Status: Expired due to Fees
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 through delivery of one or more separate pulses of infusion fluid, wherein consecutive pulses of infusion fluid are separated by a period of time during which no fluid is infused into the user'"'"'s body, the method comprising:

  • during delivery of a single one of said one or more separate pulses of infusion fluid, periodically measuring the value of a parameter associated with the motor or one of the drive train components 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 in time 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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