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Method and apparatus for detecting occlusions in an ambulatory infusion pump

  • US 8,681,010 B2
  • Filed: 10/05/2011
  • Issued: 03/25/2014
  • Est. Priority Date: 10/29/1998
  • Status: Expired due to Term
First Claim
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1. A method of detecting an occlusion in an infusion pump having a drive mechanism that includes a motor and one or more drive train components coupled to a reservoir for delivering fluid from the reservoir through a fluid path into a body of a user, the method comprising:

  • taking a series of measurements of a parameter associated with the motor or one of the drive train components;

    filtering the series of measurements to remove the highest measurement and the lowest measurement;

    calculating a weighted average of the remaining measurements in the series of measurements;

    comparing the weighted average to a maximum threshold value; and

    determining whether an occlusion has occurred in the fluid path of the infusion pump by determining whether the weighted average is greater than the maximum threshold value.

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