| 摘要 |
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 fro m 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). Thes e 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.
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