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Automatically Operating Injection Device and Method for Determining An Injection Occlusion

  • US 20100245104A1
  • Filed: 04/21/2010
  • Published: 09/30/2010
  • Est. Priority Date: 10/22/2007
  • Status: Active Grant
First Claim
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1. An injection device for automatically injecting a medicament into a human, the injection device comprising an injection unit, a measurement unit, a first memory, a second memory, a switching unit, an evaluation unit, and an occlusion alarm unit, wherein:

  • the injection unit is coupleable to the human to deliver automatically a plurality of injections of the medicament into the human, wherein the plurality of injections are each delivered according to an injection time period;

    the measurement unit is mechanically coupled to the injection unit and measures an injection force, at the injection time period, for each of the plurality of injections;

    the first memory is electrically coupled to the measurement unit and stores a value of the injection force for each of the plurality of injections measured by the measurement unit, thereby forming a series of force measurements;

    the switching unit is electrically coupled to the first memory and the second memory such that the switching unit reads the series of force measurements from the first memory, generates a plurality of evaluation forces based on an evaluation time period, and writes the plurality of evaluation forces to the second memory;

    the evaluation unit is electrically coupled to the second memory and determines whether to provide an occlusion alarm signal either based on an evaluation of the plurality of evaluation forces or if one or more of the series of force measurements exceeds a force threshold; and

    the occlusion alarm unit which receives the occlusion alarm signal such that the occlusion alarm unit provides an injection occlusion alarm based on the occlusion alarm signal.

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