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Prefilter for an Ostomy Bag

  • US 20100256581A1
  • Filed: 12/16/2008
  • Published: 10/07/2010
  • Est. Priority Date: 12/20/2007
  • Status: Abandoned Application
First Claim
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1. An ostomy appliance of the kind comprisinga collecting bag for waste materialat least one opening through which waste material may enter the collecting bagat least one filter allowing gas to exit the collecting bag, andat least one pressure sensitive gas permeable barrier-filter positioned between the at least one opening and the at least one filter, where the barrier-filter in its closed state blocks the passage of semi-solid waste and in its open state maintains an open passage for semi solid waste,where an increase in pressure inside the collecting bag exceeding a predefined first gas pressure limit triggers the transition of the barrier-filter from its closed state to its open state.

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