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Methods and apparatuses for detecting occlusions in an ambulatory infusion pump

  • US 8,864,739 B2
  • Filed: 01/17/2014
  • Issued: 10/21/2014
  • Est. Priority Date: 10/29/1998
  • Status: Expired due to Term
First Claim
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1. An infusion pump for infusing fluid from a 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 infusion pump comprising:

  • a housing;

    a motor contained within the housing;

    one or more drive train components coupled to the motor within the housing and configured to move in response to the motor to deliver fluid from the reservoir through a fluid path into the body of the user;

    a sensor that periodically measures the value of a parameter associated with the motor or one of the drive train components during delivery of a single one of said one or more separate pulses of infusion fluid to obtain a series of measurements; and

    a processor contained within the housing, wherein the processor determines a peak value of the series of measurements, selects a second value later in time than the peak value within the series of measurements, calculates a difference between the peak value and the second value, and declares an occlusion has occurred if the difference exceeds a threshold value.

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