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Occlusion sensing for an infusion pump

  • US 9,717,849 B2
  • Filed: 10/20/2016
  • Issued: 08/01/2017
  • Est. Priority Date: 05/21/2007
  • Status: Active Grant
First Claim
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1. A method for detecting an occlusion in an infusion pump system, the method comprising:

  • delivering fluid through a flow path, the flow path being in fluid communication with a flexible membrane such that pressure within the flow path above a threshold pressure causes the flexible membrane to expand, wherein the flexible membrane is positioned adjacent a light transmissive member such that the expansion of the flexible membrane results in the pressing of the flexible membrane against at least a portion of a surface of the light transmissive member;

    directing light through said light transmissive member towards said surface;

    detecting light reflected by said surface, wherein a reduction in light reflected by said surface indicates the possible occurrence of an occlusion.

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