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Systems and methods to address air, leaks and occlusions in an insulin pump system

  • US 8,608,699 B2
  • Filed: 03/23/2010
  • Issued: 12/17/2013
  • Est. Priority Date: 03/31/2009
  • Status: Active Grant
First Claim
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1. A method for determining the presence of air in a cartridge or infusion tube set comprising:

  • inserting a cartridge into a pump, at least one of the cartridge and an infusion tube set being sealed;

    moving a cartridge plunger a predetermined distance into the cartridge at a first time;

    measuring a first pressure in the at least one of the cartridge and the infusion tube set while the cartridge plunger is moved the predetermined distance; and

    determining the at least one of the cartridge and an infusion tube set contains some amount of air if the pressure measurement is less than a specified pressure,wherein moving the cartridge plunger the predetermined distance includes gradually moving the plunger over a period of time until the predetermined plunger position is reached, and measuring the first pressure in the cartridge and the infusion set tube includes measuring a pressure rate of change in the at least one of cartridge and the infusion tube set over the period of time.

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