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Occlusion detection system for an infusion pump

  • US 5,695,473 A
  • Filed: 07/27/1994
  • Issued: 12/09/1997
  • Est. Priority Date: 07/27/1994
  • Status: Expired due to Term
First Claim
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1. An occlusion detection system comprising:

  • a fluid tube;

    an infusion pump, the fluid tube operatively engaged to the infusion pump, the infusion pump having an inlet valve, an expulsor valve and an outlet valve, the valves engaging the tube to force fluid through the tube at a baseline pressure, the valves further operative to create a normal negatively directed transient pressure condition less than the baseline pressure upstream of the pump during un-occluded operation;

    a pressure sensor connected to the fluid tube of the infusion pump for monitoring the negatively directed transient pressure;

    a control module connected to the sensor, the control module including means for detecting an absence of the negatively directed transient pressure in fluid tube; and

    an alarm module for signaling an upstream occlusion when the means for detecting indicates the negatively directed transient pressure condition is absent.

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