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Apparatus and method for the detection of air in fluid delivery systems

  • US 4,981,467 A
  • Filed: 02/27/1990
  • Issued: 01/01/1991
  • Est. Priority Date: 02/27/1990
  • Status: Expired due to Term
First Claim
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1. An infusion device, comprising:

  • infusion pump means for delivering a liquid through an infusion conduit from a separate source of the liquid into a patient;

    bubble detector means for detecting the presence of an air bubble in the infusion conduit; and

    control means responsive to the bubble detector means for determining if the size of the air bubble is unacceptable;

    which control means is configured to determine if during the time the air bubble is detected it advances a distance indicative of the unacceptable size.

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