Ostomy bag with multi-stage filter

Details Ostomy bag with multi-stage filter Ostomy bag with multi-stage filter

1995-02-01

1997-07-01

Polutta, Mark O.

Surgery

Means and methods for collecting body fluids or waste material

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

604338, A61F 544

Patent

active

056432348

ABSTRACT:
The ostomy bag includes a multi-stage filter system that provides contamination protection for a deodorizing filter in the system. The multi-stage filter system also includes protection elements that are impassable to semi-liquid waste material but permit passage of gaseous waste. The protection elements are located such that gaseous waste must pass through the protection elements before it passes through the deodorizing filter. In one embodiment of the invention, the protection elements include a fluid and gas-impermeable cover layer with fluid bypass ports. The fluid and gas-impermeable cover layer is followed by a barrier filter that restricts passage of semi-liquid waste material. The barrier filter is followed by a liquid-impermeable membrane that prevents passage of liquid. The liquid-impermeable membrane is followed by a moisture-absorbent pad that is adjacent the deodorizing filter. The moisture-absorbent pad absorbs moisture condensate that may progress as vapor through the liquid-impermeable membrane. Thus semi-liquid waste cannot contact the deodorizing filter, since it cannot bypass the protection elements to reach the deodorizing filter.

REFERENCES:
patent: 4957522 (1990-09-01), Bressell
patent: 5074851 (1991-12-01), Pless et al.
patent: 5250042 (1993-10-01), Torgalker et al.
patent: 5306264 (1994-04-01), Ferguson et al.
patent: 5352316 (1994-10-01), Steer
patent: 5370638 (1994-12-01), Rekeyes
patent: 5417678 (1995-05-01), Baumann et al.
patent: 5468235 (1995-11-01), La Gro

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