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Detecting empty medical pump reservoir

  • US 8,246,573 B2
  • Filed: 04/27/2010
  • Issued: 08/21/2012
  • Est. Priority Date: 04/27/2010
  • Status: Active Grant
First Claim
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1. A medical device system comprising:

  • a reservoir configured to store a therapeutic fluid;

    a medical pump configured to deliver the therapeutic fluid from the reservoir to a patient, the medical pump comprising an actuation mechanism configured to be energized to provide a pump stroke;

    a sensor configured to detect a property associated with the energy required to energize the actuation mechanism;

    a processor configured to determine when the property associated with the energy required to energize the actuation mechanism indicates the reservoir is empty or near empty; and

    wherein the property associated with the energy required to energize the actuation mechanism comprises at least one of a shape of a current waveform through the actuation mechanism when providing for a pump stroke, an energy supplied to the actuation mechanism in order to produce a pump stroke, and a voltage change across the actuation mechanism during a pump stroke.

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