Venting/filter assembly, bag incorporating same and method of venting flatus gasses
First Claim
1. A filter assembly for an ostomy bag having a gas venting aperture for venting gases from the interior of such bag, said filter assembly comprising a filter pad and a gas permeable barrier membrane extending over a first interior-facing surface of said filter pad for preventing liquid and solid waste from contacting said filter pad;
- said barrier membrane comprising an unlaminated microporous film of ultra high molecular weight polyethylene having a porosity allowing passage through said membrane of gas-carried particles having a maximum dimension smaller than 0.45 micrometers.
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Accused Products
Abstract
A bag for receiving waste discharge from a human body, and the venting/filter assembly for such a bag, are disclosed. The combination includes a filter for deodorizing gas vented through an aperture in one wall of the bag and a gas-permeable barrier membrane disposed between the filter and the interior of the bag so that all gas exiting the bag flows through the membrane. The barrier membrane comprises an unlaminated microporous film of ultra high molecular weight polyethylene impermeable to waste liquids and solids and having a porosity capable of blocking the passage of bacteria and, preferably, at least some viruses. A method of so venting flatus gasses while preventing the escape of microorganisms is also disclosed.
20 Citations
4 Claims
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1. A filter assembly for an ostomy bag having a gas venting aperture for venting gases from the interior of such bag, said filter assembly comprising a filter pad and a gas permeable barrier membrane extending over a first interior-facing surface of said filter pad for preventing liquid and solid waste from contacting said filter pad;
- said barrier membrane comprising an unlaminated microporous film of ultra high molecular weight polyethylene having a porosity allowing passage through said membrane of gas-carried particles having a maximum dimension smaller than 0.45 micrometers.
- View Dependent Claims (2, 3, 4)
Specification