Surgery – Means and methods for collecting body fluids or waste material – Receptacle attached to or inserted within body to receive...
Reexamination Certificate
2000-01-18
2001-01-09
Weiss, John G. (Department: 3763)
Surgery
Means and methods for collecting body fluids or waste material
Receptacle attached to or inserted within body to receive...
Reexamination Certificate
active
06171288
ABSTRACT:
BACKGROUND TO THE INVENTION
The invention relates to an ostomy bag, and in particular to a vented bag with a gas filter.
Ostomy bags incorporating gas filters are known and examples are described in GB 2 116 433 and EP 0 852 936.
The first of these earlier patent documents, GB 2 116 433, describes an ostomy bag having two outer walls, one intermediate wall and two chambers. The ostomy-receiving opening is provided in one outer wall, a gas vent is provided in the intermediate wall and a gas passage is provided in the second outer wall which is also fitted with a gas filter. The upper portion of the intermediate wall is embossed to help prevent the various walls sticking together and inhibiting gas flow.
The second of these earlier patent documents, EP 0 852 936, describes an ostomy bag having two outer walls, one full and one partial intermediate wall, and two chambers. The partial intermediate wall is located in the upper portion of the second chamber. The ostomy-receiving opening is provided in the first outer wall, gas vent is provided in the full intermediate wall and a gas passage is provided in the other outer wall which is also provided with a gas filter.
One of the problems experienced by users of vented ostomy bags with gas filters is the blocking of the gas filter by solids or liquids. The division of the ostomy bags into two chambers and the provision of complex gas paths through the bags to the filter are attempts to reduce the occurrence of this problem. However, the known products are not completely successful at overcoming the problems described.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an alternative form of ostomy bag with a gas filter which mitigates the above described problems.
According to the present invention there is provided a vented ostomy bag with a gas filter, the bag having a top and a bottom and comprising first and second outer walls sealed around their edges, the first outer wall incorporating a stoma-receiving opening; wherein the bag further comprises first and second intermediate walls also sealed with the first and second outer walls around their edges to provide between the first outer and first intermediate walls a first chamber, between the first and second intermediate walls a second chamber and between the second intermediate and second outer walls a third chamber; a first gas vent being provided in the first intermediate wall between the first and second chambers for the passage of gas there between, a second gas vent being provided in the second intermediate wall between the second and third chambers for the passage of gas there between, and a gas passage being provided from the third chamber out of the bag which passes through the gas filter.
The walls are conveniently formed of thermoplastics material and are sealed at their edges by welding.
Preferably the gas passage is provided through the second intermediate wall, the first intermediate wall and the first outer wall.
The gas filter, the second intermediate wall, the first intermediate wall and first outer wall are conveniently all welded together to provide the gas passage from the third chamber out of the bag.
The gas filter may be provided within the third chamber on the second intermediate wall.
Preferably the gas filter, first gas vent and second gas vent are all provided between the stoma-receiving opening and the top of the bag.
In addition the gas filter, first gas vent and second gas vent are preferably laterally disposed with respect to each other.
Conveniently the gas filter is located substantially centrally of the width of the bag, the first gas vent is laterally disposed to one side of the gas filter and the second gas vent is laterally disposed to the other side of the gas filter.
The first and second gas vents may comprise “S” shaped cuts in the respective intermediate walls.
The portions of one or both of the intermediate walls between the ostomy-receiving opening and the top of the bag may have surfaces which are non-smooth. The non-smooth surface(s) may be formed by embossing of the intermediate wall(s).
REFERENCES:
patent: 4411659 (1983-10-01), Jensen et al.
patent: 5672163 (1997-09-01), Ferreira et al.
patent: 5690623 (1997-11-01), Lenz et al.
patent: 5865819 (1999-02-01), Cisko, Jr. et al.
patent: 0 852 936 (1998-07-01), None
patent: 2 116 433 (1983-09-01), None
patent: 2139501 (1984-11-01), None
patent: 2149306 (1985-06-01), None
patent: 2 265 832 (1993-10-01), None
patent: 2 290 712 (1996-01-01), None
patent: 2311014 (1997-09-01), None
Lam Ann Y.
Marshall O'Toole Gerstein Murray & Borun
Salt & Son Limited
Weiss John G.
LandOfFree
Ostomy bag does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ostomy bag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ostomy bag will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2491002