Ostomy bag filter with interactive surfaces
AssigneeColoplast A/S
InventorBjarne Worsoee
Life of this patent
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Abstract
An ostomy bag with a filter assembly having a gas filter and a pre-filter for preventing or delaying solid/semisolid matter and liquid from reaching the gas filter. The pre-filter is at least substantially flat and comprises a number of constrictions, such as ribs extending along and between two inner surface parts of the channel. These constrictions/ribs form narrower and wider passages where the gas may more quickly pass a narrow passage and where the wider passages tend to receive and hold the liquid, solid matter and semisolid matter. At least a part of one of the surfaces may comprise an interactive agent adapted to interact with the fluid passing through the gas channel.
Claims9
A pre-filter for a gas filtering assembly for an ostomy appliance, the pre-filter comprising
- a gas entrance,
- a gas exit, and
- a gas channel defined between the gas entrance and the gas exit, the gas channel having two opposed, substantially liquid impermeable surfaces defining there between a number of constrictions each having a predetermined, largest width, wherein the distance between the two opposed surfaces, at the constriction(s), is significantly smaller than the largest width of the constriction,
- wherein at least a part of one of the substantially liquid impermeable surfaces comprises an interactive agent adapted to interact with the fluid passing through the gas channel.
Dependencies are inferred from the claim text.