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Occlusion detection system and method

  • US 9,024,768 B2
  • Filed: 07/16/2012
  • Issued: 05/05/2015
  • Est. Priority Date: 10/10/2008
  • Status: Active Grant
First Claim
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1. A method for an infusion pump assembly, the method comprising:

  • monitoring a displacement of one or more displaceable mechanical components included within the infusion pump assembly and comparing the displacement to an expected displacement to determine if the one or more displaceable mechanical components were displaced the expected displacement in response to delivery of one or more of a first dose of an infusible fluid and a second dose of the infusible fluid;

    if the one or more displaceable mechanical components were not displaced the expected displacement in response to delivery of one or more of the first dose of the infusible fluid and the second dose of the infusible fluid, initiating an alarm sequence on the infusion pump assembly;

    determining a first rate-of-change for the first dose based on the displacement during the first dose;

    determining a second rate-of-change for the second dose based on the displacement during the second dose;

    determining an average rate-of-change reading for the first dose and the second dose based on the first and second rates-of-change;

    comparing the average rate-of-change reading to a threshold rate-of-change reading to determine if the average rate-of-change reading exceeds the threshold rate-of-change reading; and

    if the average rate-of-change reading exceeds the threshold rate-of-change reading, initiating the alarm sequence on the infusion pump assembly.

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