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Systems and Methods for Electrolysis Pump Control

  • US 20140088555A1
  • Filed: 09/24/2013
  • Published: 03/27/2014
  • Est. Priority Date: 09/24/2012
  • Status: Abandoned Application
First Claim
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1. A method for controlling a drug-delivery device comprising a drug vial, a plunger movably disposed within the vial, and an electrolysis pump for causing movement of the plunger so as to expel liquid drug from an outlet of the vial, the method comprising:

  • causing generation of gas in an electrolysis pump chamber by supplying a drive current to electrolysis electrodes contained in the chamber;

    continuously measuring (i) a drive current supplied to the electrolysis electrodes, and (ii) a gas pressure in the electrolysis pump chamber;

    based on the measured drive current and the measured gas pressure, computing a volume of electrolysis gas generated in the pump chamber, and inferring at least one of a drug flow rate or a cumulative delivered volume of drug therefrom; and

    controlling the drive current based, at least in part, on the inferred drug flow rate or cumulative delivered volume of drug.

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