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Method and apparatus for detecting occlusions in an ambulatory infusion pump

  • US 8,062,257 B2
  • Filed: 05/06/2010
  • Issued: 11/22/2011
  • 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, theinfusion pump comprising:

  • a housing;

    a drive mechanism including a motor and one or more drive components contained within the housing and operatively coupled to the reservoir to deliver fluid from the reservoir through a fluid path into the body of the user;

    one or more electronic components to take a series of measurements of a parameter associated with the motor or one of the drive train components; and

    a controller contained within the housing, wherein the controller filters the series of measurements to remove the highest measurement and the lowest measurement, calculates a weighted average of the remaining measurements in the series of measurements, compares the weighted average to a maximum threshold value, and determines 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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