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VENTED DRUG RESERVOIR UNIT

  • US 20110160670A1
  • Filed: 03/11/2011
  • Published: 06/30/2011
  • Est. Priority Date: 10/17/2005
  • Status: Active Grant
First Claim
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1. A method of preventing condensate on an interior window portion contained in a housing in a reservoir unit for an insulin pump device, wherein the window allows a user to inspect the drug contained in the reservoir, the method comprising the steps of:

  • placing the reservoir unit in a refrigerator and allowing it to reach a first stable condition having a first temperature and humidity;

    removing the reservoir unit from the refrigerator and placing it in an environment with a second temperature and humidity, wherein the second temperature is higher than the first temperature;

    venting an interior portion of housing to the ambient air;

    wherein the venting allows an 80% pressure equalization between the interior of the housing and the exterior at a pressure differential of 350 mBar in less than 60 minutes and wherein the venting allows ambient aqueous vapour to pass from the exterior to the interior of the reservoir unit; and

    preventing visible water condensation from forming on the interior surface of the window portion.

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