Ostomy Bag

• US 20070276346A1
• Filed: 12/23/2004
• Published: 11/29/2007
• Est. Priority Date: 12/30/2003
• Status: Active Grant

• Current Assignee: Coloplast A/S
• Original Assignee: Coloplast A/S
• Inventors: Olsen, Hans, Kristensen, Morgens, Worsoe, Bjarne, Nielsen, Per, Poulsen, Lars
• Granted Patent: US 7,789,866 B2
• Time in Patent Office: Days
• US Class Current: 604/333
• CPC Class Codes: A61F 5/441 having venting or deodorant means, e.g. filters ; having antiseptic means, e.g. bacterial barriers

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. The constrictions may be provided as a single, monolithic element, such as an extruded element.

Claims

1. An ostomy appliance comprising a collecting bag and a gas filtering assembly positioned in a gas path from an interior of the collecting bag to the surroundings, the gas filtering assembly comprising, in the flow direction of the gas from the interior to the surroundings, a pre-filter and a gas filter, wherein the pre-filter comprises a gas entrance and a gas exit and, there between, a gas channel having two opposed, at least 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.

2. An appliance according to claim 1, wherein the gas channel is oblong.

3. An appliance according to claim 1, wherein at least one of the constrictions comprises a rib extending along one of the opposed surfaces.

4. An appliance according to claim 3, wherein the rib extends along the direction of flow in the gas channel.

5. An appliance according to claim 3, wherein the rib extends across the direction of flow in the gas channel.

6. An appliance according to claim 1, wherein at least one constriction has a cross section having, at one side thereof, a concave part adapted to receive solid or liquid material.

7. An appliance according to claim 1, wherein the constrictions are provided only at a predetermined area of the opposed surfaces.

8. An appliance according to claim 1, wherein the constrictions in the gas channel have different lengths, the longer constrictions being positioned closer to the entrance than the constrictions of shorter lengths.

9. An appliance according to claim 1, wherein the constrictions are provided as a monolithic element.

10. An appliance according to claim 9, wherein one of the opposed surfaces is defined by a part of a wall of the bag, and wherein the monolithic element forms the other of the opposed surfaces and further comprises means for engaging or attaching to the part of the wall so as to define the gas channel.

11. An appliance according to claim 9, wherein the monolithic element is at least substantially flat having two main sides, and having one or more constrictions on each of the two main sides.