An ostomy bag

Details An ostomy bag An ostomy bag

A - Human Necessities

61

F

A61F 5/441 (2006.01)

Patent

CA 2551655

An ostomy bag (10) with a filter assembly having a gas filter (18) and a pre- filter (14) for preventing or delaying solid/semisolid matter and liquid from reaching the gas filter (18). The pre-filter (14) is at least substantially flat and comprises a number of constrictions (28), such as ribs extending along and between two inner surface parts (24, 26) of the channel (22). These constrictions/ribs (28) 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 (28) may be provided as a single, monolithic element, such as an extruded element.

La présente invention a trait à une poche de stomie comportant un ensemble de filtre comprenant un filtre bactérien et un préfiltre pour empêcher ou retarder l'arrivée de matière solide/semi-solide et de liquide au niveau du filtre bactérien. Le préfiltre est au moins sensiblement plat et comporte une pluralité d'étranglements, tels que des nervures s'étendant le long et entre deux parties de surface du canal. Ces étranglements/nervures forment des passages plus étroits et plus larges où le gaz peut traverser plus rapidement un passage étroit et où les passages plus larges ont tendance à recevoir et à retenir le liquide, la matière solide et la matière semi-solide. Les étranglements peuvent être prévus sous la forme d'un élément monolithique unique, tel qu'un élément extrudé.

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