Pre-filter for an ostomy bag

Details Pre-filter for an ostomy bag Pre-filter for an ostomy bag

2011-08-30

2011-08-30

Hand, Melanie J (Department: 3761)

Surgery

Means and methods for collecting body fluids or waste material

Receptacle attached to or inserted within body to receive...

C604S331000, C604S332000, C604S334000, C604S335000, C604S336000, C604S337000, C604S338000, C604S339000, C604S341000, C604S359000, C604S360000

Reexamination Certificate

active

08007482

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 the constrictions may be provided in a random pattern.

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