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Syringe pump rapid occlusion detection system

  • US 8,900,213 B2
  • Filed: 06/07/2012
  • Issued: 12/02/2014
  • Est. Priority Date: 11/04/2003
  • Status: Active Grant
First Claim
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1. A method of automatically detecting an occlusion in a downstream fluid line of a medical pumping system, the downstream fluid line being configured to carry fluid under pressure between a fluid source and a patient, the method comprising:

  • operating the medical pumping system to carry fluid under pressure in the downstream fluid line over a series of intervals having a first interval, a last interval, and a plurality of intervals therebetween;

    determining, for each of the first interval, the last interval, and at least one of the plurality of intervals therebetween (“

    middle interval”

    ), a relationship between an instantaneous pressure indicative of force in the downstream fluid line at an end of the interval and an instantaneous pressure indicative of force in the downstream fluid line at a beginning of the interval; and

    providing an indication that an occlusion exists if (a) for each of the first interval, the last interval, and the middle interval the determined relationship departs from an expected relationship and (b) for at least a second one of the plurality of intervals (“

    intermediate interval”

    ) either (i) said relationship is not determined or (ii) said relationship is determined, but said determined relationship of the intermediate interval does not depart from the expected relationship.

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