WO2001001898A1 - Stoma filter - Google Patents

Stoma filter Download PDF

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Publication number
WO2001001898A1
WO2001001898A1 PCT/DE2000/002045 DE0002045W WO0101898A1 WO 2001001898 A1 WO2001001898 A1 WO 2001001898A1 DE 0002045 W DE0002045 W DE 0002045W WO 0101898 A1 WO0101898 A1 WO 0101898A1
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WO
WIPO (PCT)
Prior art keywords
gas
filter
liquid
impermeable
stoma
Prior art date
Application number
PCT/DE2000/002045
Other languages
German (de)
French (fr)
Inventor
Daniela Wick
Manfred Krull
Original Assignee
Helsa-Werke Helmut Sandler Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Helsa-Werke Helmut Sandler Gmbh & Co. Kg filed Critical Helsa-Werke Helmut Sandler Gmbh & Co. Kg
Publication of WO2001001898A1 publication Critical patent/WO2001001898A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/44—Devices worn by the patient for reception of urine, faeces, catamenial or other discharge; Portable urination aids; Colostomy devices
    • A61F5/441—Devices worn by the patient for reception of urine, faeces, catamenial or other discharge; Portable urination aids; Colostomy devices having venting or deodorant means, e.g. filters ; having antiseptic means, e.g. bacterial barriers

Definitions

  • the invention relates to an ostomy filter made of a porous, gas-permeable filter material which is hermetically sealed between a gas and liquid impermeable film with a gas inlet opening and a gas impermeable film with a gas outlet opening to the environment.
  • Odor filters for ostomy bags have been an integral part of ostomy care systems for many years.
  • the filter devices are firmly attached to the gas outlet opening with the soma bag and enable the collecting container to be vented without the liquid or solid components of the excreted intestinal contents emerging from the bag.
  • the filter also forms a gas passage resistance, so that an internal pressure builds up in the ostomy pouch, which prevents the pouch from collapsing and thus from closing. If the internal pressure of the bag exceeds the gas flow resistance of the stoma filter, the gas flows out of the inside of the bag through the filter to the outside, preventing the bag from inflating too much.
  • Efficient filter media that reliably remove odorous substances from the escaping gases are a prerequisite for the ability of the ostomy pouch to be ventilated, in order to avoid any unpleasant odors in the environment.
  • odor filters consist of a porous, essentially oblong-flat, odor-eliminating filter medium.
  • the filter material consists of an open-pore foam carrier made of polyurethane in which activated carbon powder impregnated with copper salts is fixed by means of a binder.
  • the filter material is inserted between a gas and liquid impermeable wall with a gas inlet opening and a gas and liquid impermeable wall with a gas outlet opening.
  • a long-standing unsolved problem with filters of this type is the hermetically sealed integration of the filter material along its longitudinal edges between the two walls.
  • Transparent films in particular based on PVDC, are used as gas and liquid-impermeable walls, which are welded under light pressure at 100 to 120 ° C. If the contact pressure or the welding temperature on the longitudinal edges of the filter material is too low, it will not be tightly bound between the two foils. Insufficiently sealed welding leads to bypass flows when gas passes through the filter device, which prevents reliable odorant removal in the filter medium. If the contact pressure or temperature is too high when welding the films, this can lead to injuries to the film. The gas can then emerge from the collecting container unfiltered through the holes in the foils which are formed during the welding.
  • the object of the present invention is to provide an ostomy filter of the type described in the introduction, the filter material of which is reliably tightly integrated in the longitudinal edge regions between the gas and liquid-impermeable filter walls.
  • the tight integration of the filter material is achieved according to the invention through the use of a weldable or gluable, gas and liquid impermeable, compressible filter wall material.
  • Closed-cell foams are particularly suitable for this Polyolefin or polyurethane base that can be attached to the filter material on one or both sides instead of the conventional foils.
  • the compressible foam Due to the compressible foam, an increased contact pressure can be used when welding or gluing the filter walls along the longitudinal edges of the filter material. When pressed, the foam adapts its spatial shape to the filter edges and thus optimally seals the filter material.
  • Conventional adhesives preferably based on acrylate, are used to bond foams.
  • the compressible foams are welded above the softening point of the foams, e.g. for polyolefin foams between 90 and 120 ° C or for polyurethanes between 160 and 200 ° C.
  • the thickness of the filter wall materials leads to a further practical advantage of the stoma filter according to the invention.
  • the filter wall lying to the inside of the bag with the gas inlet opening can be structured with a hot stamping die toward the inlet opening, which is not shaped by the entire thickness of the foam. If a semi-permeable gas-permeable but liquid-impermeable membrane is attached via this structure, flow channels are formed between the membrane and the foam. Through these channels, the pressure drop through the membrane in the stoma filter is reduced. This prevents the membrane from resting directly on the filter wall. In return, the lower pressure drop through the semipermeable membrane allows an increased adsorber density in the filter medium. This increases the performance of the stoma filter.
  • a filter material made of an open-pore PUR foam support in which an activated carbon powder impregnated with copper salts is fixed is welded on both sides to two closed-pore 1.1 mm thick foam walls at 110 ° C.
  • the filter material is 36mm long, 6mm wide and 2mm high.
  • the foam walls protrude beyond the edges of the filter material by at least 3 mm to seal the filter walls enable.
  • the tightly welded stoma filter is provided with a gas inlet opening on the inside of the bag.
  • a V-shaped embossing tool is used to emboss a 0.2 to 0.5 mm deep flow channel into the foam wall towards the gas inlet.
  • the semi-permeable membrane based on PUR is attached to the foam wall in such a way that it completely covers the gas inlet opening and the impressed flow channel in a liquid-tight manner.
  • a gas outlet opening is punched into the outer foam wall.

Abstract

The invention relates to a stoma filter in which at least one of its walls that is impervious to gas and liquid is made of a compressible material, especially of a closed-pore foamed material. The compressible material makes it possible to integrate the filter material in a reliably tight manner along the longitudinal edges between the filter walls.

Description

Stomafilter HME
Die Erfindung betrifft einen Stomafilter aus einem porösen, gasdurchlässigen Filtermaterial, das hermetisch dicht zwischen einer gas- und flüssigkeitsundurchlässigen Folie mit einer Gaseinlaßöffnung und einer gasundurchlässigen Folie mit einer Gasaustrittsöffnung zur Umgebung eingebracht ist.The invention relates to an ostomy filter made of a porous, gas-permeable filter material which is hermetically sealed between a gas and liquid impermeable film with a gas inlet opening and a gas impermeable film with a gas outlet opening to the environment.
Geruchsfilter für Stomabeutel sind seit vielen Jahren integrierter Bestandteil der Stomaversorgungssysteme. Die Filtereinrichtungen sind fest mit dem Somabeutel an deren Gasaustrittsöffnung angebracht und ermöglichen eine Entlüftung des Sammelbehälters ohne das flüssige oder feste Bestandteile des ausgeschiedenen Darminhaltes aus dem Beutel austreten. Der Filter bildet weiterhin einen Gasdurchlaßwiderstand, so daß sich im Stomabeutel ein Innendruck aufbaut, der das Zusammenfallen und damit den Verschluß des Beutels verhindert. Übersteigt der Beutelinnendruck den Gasdurchlaßwiderstand des Stomafilters strömt das Gas aus dem Beutelinneren durch den Filter nach außen, ein zu starkes Aufblähen des Beutels wird dadurch verhindert. Voraussetzung für die Entlüftbarkeit des Stomabeutels sind leistungsfähige Filtermedien, die die austretenden Gase zuverlässig von Geruchsstoffen befreien, um eine Geruchsbelästigung der Umgebung zu vermeiden.Odor filters for ostomy bags have been an integral part of ostomy care systems for many years. The filter devices are firmly attached to the gas outlet opening with the soma bag and enable the collecting container to be vented without the liquid or solid components of the excreted intestinal contents emerging from the bag. The filter also forms a gas passage resistance, so that an internal pressure builds up in the ostomy pouch, which prevents the pouch from collapsing and thus from closing. If the internal pressure of the bag exceeds the gas flow resistance of the stoma filter, the gas flows out of the inside of the bag through the filter to the outside, preventing the bag from inflating too much. Efficient filter media that reliably remove odorous substances from the escaping gases are a prerequisite for the ability of the ostomy pouch to be ventilated, in order to avoid any unpleasant odors in the environment.
In der Druckschrift EP 0 235 928 AI werden leistungsfähige, in der Praxix bewährte, Geruchsfilter beschrieben, die aus einem porösen, im wesentlichen länglich- flachen, geruchsbeseitigendem Filtermedium bestehen. Das Filtermaterial besteht aus einem offenporigen Schaumstoffträger aus Polyurethan in dem mit Kupfersalzen imprägniertes Aktivkohlepulver mittels eines Binders fixiert ist. Das Filtermaterial wird zwischen einer gas- und flüssigkeitsundurchlässigen Wand mit einer Gaseinlaßöffnung und einer gas- und flüssigkeitsundurchlässigen Wand mit einer Gasauslaßöffnung eingesetzt.In the publication EP 0 235 928 AI, efficient, proven in the Praxix, odor filters are described, which consist of a porous, essentially oblong-flat, odor-eliminating filter medium. The filter material consists of an open-pore foam carrier made of polyurethane in which activated carbon powder impregnated with copper salts is fixed by means of a binder. The filter material is inserted between a gas and liquid impermeable wall with a gas inlet opening and a gas and liquid impermeable wall with a gas outlet opening.
Ein seit langem ungelöstes Problem bei Filtern dieser Bauart ist die hermetisch dichte Einbindung des Filtermaterials entlang dessen Längskanten zwischen den beiden Wänden. Als gas- und flüssigkeitsundurchlässige Wände werden transparente Folien, insbesondere auf PVDC-Basis eingesetzt, die unter leichtem Druck bei 100 bis 120 °C verschweißt werden. Ist der Anpreßdruck oder die Anschweißtemperatur an den Längskanten des Filtermaterials zu niedrig wird es nicht dicht zwischen den beiden Folien eingebunden. Eine ungenügend dichte Verschweißung führt beim Gasdurchtritt durch die Filtereinrichtung zu Bypass- Strömen, die eine zuverlässige Geruchsstofftilgung im Filtermedium verhindern. Wird beim verschweißen der Folien ein zu hoher Anpreßdruck oder eine zu hohe Temperatur eingesetzt, kann dies zu Verletzungen der Folie führen. Das Gas kann dann aus dem Sammelbehälter unfiltriert durch die, bei der Verschweißung entstandenen Löcher in den Folien, austreten.A long-standing unsolved problem with filters of this type is the hermetically sealed integration of the filter material along its longitudinal edges between the two walls. Transparent films, in particular based on PVDC, are used as gas and liquid-impermeable walls, which are welded under light pressure at 100 to 120 ° C. If the contact pressure or the welding temperature on the longitudinal edges of the filter material is too low, it will not be tightly bound between the two foils. Insufficiently sealed welding leads to bypass flows when gas passes through the filter device, which prevents reliable odorant removal in the filter medium. If the contact pressure or temperature is too high when welding the films, this can lead to injuries to the film. The gas can then emerge from the collecting container unfiltered through the holes in the foils which are formed during the welding.
Aufgabe der vorliegenden Erfindung ist es, einen Stomafilter der Eingangs beschriebenen Art zur Verfügung zu stellen, dessen Filtermaterial in den Längskantenbereichen zuverlässig dicht zwischen den gas- und flüssigkeitsundurchlässigen Filterwänden eingebunden ist.The object of the present invention is to provide an ostomy filter of the type described in the introduction, the filter material of which is reliably tightly integrated in the longitudinal edge regions between the gas and liquid-impermeable filter walls.
Die dichte Einbindung des Filtermaterials wird erfindungsgemäß durch die Verwendung eines verschweiß- oder verklebbaren, gas- und flüssigkeitsundurchlässigen, komprimierbaren Filterwandmaterials erreicht. Insbesondere geeignet sind dafür geschlossenporige Schaumstoffe auf Polyolefin- oder Polyurethan-Basis die ein- oder beidseitig anstatt der herkömmlichen Folien am Filtermaterial angebracht werden.The tight integration of the filter material is achieved according to the invention through the use of a weldable or gluable, gas and liquid impermeable, compressible filter wall material. Closed-cell foams are particularly suitable for this Polyolefin or polyurethane base that can be attached to the filter material on one or both sides instead of the conventional foils.
Durch den komprimierbaren Schaumstoff kann beim verschweißen oder beim verkleben der Filterwände entlang der Längskanten des Filtermaterials ein erhöhter Anpreßdruck verwendet werden. Der Schaumstoff paßt beim Anpressen seine räumliche Gestalt den Filterkanten an und dichtet dadurch das Filtermaterial optimal ab.Due to the compressible foam, an increased contact pressure can be used when welding or gluing the filter walls along the longitudinal edges of the filter material. When pressed, the foam adapts its spatial shape to the filter edges and thus optimally seals the filter material.
Zum Verkleben von Schaumstoffen werden herkömmliche Klebstoffe, bevorzugt auf Acrylat-Basis eingesetzt. Das Verschweißen der komprimierbaren Schaumstoffe erfolgt oberhalb des Erweichungspunktes der Schaumstoffe, z.B. bei Polyolefin-Schaumstoffen zwischen 90 und 120 °C oder bei Polyurethanen zwischen 160 und 200 °C.Conventional adhesives, preferably based on acrylate, are used to bond foams. The compressible foams are welded above the softening point of the foams, e.g. for polyolefin foams between 90 and 120 ° C or for polyurethanes between 160 and 200 ° C.
Um eine ausreichende Dichtheit entlang der Längskanten des Filtermaterials zu erreichen reicht es meist aus, nur für eine Filterwand einen Schaumstoff einzusetzen, für die zweite Filterwand kann dann auf herkömmliche Folien zurückgegriffen werden. Als vorteilhaft hat sich dabei die Verklebungstechnik herausgestellt, da hier die Einbindung des Filtermaterials bei niedrigeren Temperaturen als beim Verschweißen abläuft und darüberhinaus mit einem geeigneten Kleber die unterschiedlichsten Materialen problemlos verklebt werden können. Bei der Verschweißtechnik wird bevorzugt auf Schaumstoffe auf Polyolefin-Basis zurückgegriffen, da hier die Anschweißtemperatur gering ist und damit die Gefahr einer Verletzung der zweiten Filterwand aus einem anderen Material verringert wird. Um eine ausreichende Komprimierbarkeit der Filterwandmaterialien zu gewährleisten ist eine ausreichende Dicke des Materials notwendig. Bei den geschlossenporigen Polyolefm- oder Polyurethan-Schaumstoffen hat sich eine Dicke zwischen 0,5mm und 1,5mm als vorteilhaft erwiesen. Bei sehr dünnen Polyolefin-Schaumstoffwänden werden bevorzugt fluorierte Polyolefin-Schaumstoffe benutzt, da diese eine verbesserte Gasundurchlässigkeit besitzen.In order to achieve a sufficient tightness along the longitudinal edges of the filter material, it is usually sufficient to use a foam for only one filter wall; conventional films can then be used for the second filter wall. Adhesive technology has proven to be advantageous, since the filter material is incorporated at lower temperatures than when welding, and a wide range of materials can also be easily glued using a suitable adhesive. In the welding technique, preference is given to using polyolefin-based foams, since the welding temperature is low here and the risk of injury to the second filter wall made of another material is thus reduced. A sufficient thickness of the material is necessary to ensure sufficient compressibility of the filter wall materials. In the case of closed-pore polyolefin or polyurethane foams, a thickness between 0.5 mm and 1.5 mm has proven to be advantageous. In the case of very thin polyolefin foam walls, fluorinated polyolefin foams are preferably used, since these have improved gas impermeability.
Die Dicke der Filterwandmaterialien führt zu einm weiteren praktischen Vorteil der erfindungsgemäßen Stomafilter. Die zum Beutelinneren liegende Filterwand mit der Gaseinlaßöffnung kann zur Einlaßöffnung hin mit einem heißen Prägestempel eine Strukturierung erhalten, die nicht durch die gesamte Dicke des Schaumstoffes geprägt wird. Wird über diese Struktur eine semipermeable gasdurchlässige aber flüssigkeitsundurchlässige Membran befestigt bilden sich Strömungskanäle zwischen der Membran und dem Schaumstoff. Durch diese Kanäle wird der Druckabfall durch die Membran im Stomafilter erniedrigt. Ein Aufliegen der Membran direkt an der Filterwand wird verhindert. Der niedrigere Druckabfall durch die semipermeable Membran erlaubt im Gegenzug eine erhöhte Adsorberdichte im Filtermedium. Die Leistungsfähigkeit der Stomafilter wird dadurch erhöht.The thickness of the filter wall materials leads to a further practical advantage of the stoma filter according to the invention. The filter wall lying to the inside of the bag with the gas inlet opening can be structured with a hot stamping die toward the inlet opening, which is not shaped by the entire thickness of the foam. If a semi-permeable gas-permeable but liquid-impermeable membrane is attached via this structure, flow channels are formed between the membrane and the foam. Through these channels, the pressure drop through the membrane in the stoma filter is reduced. This prevents the membrane from resting directly on the filter wall. In return, the lower pressure drop through the semipermeable membrane allows an increased adsorber density in the filter medium. This increases the performance of the stoma filter.
In einem bevorzugten Ausführungsbeispiel wird ein Filtermaterial aus einem offenporigen PUR-Schaumstoffträger in dem ein mit Kupfersalzen imprägniertes Aktivkohlepulver fixiert ist, beidseitig mit zwei geschlossenporigen 1,1mm dicken Schaumstoffwänden bei 110 °C verschweißt. Das Filtermaterial ist 36mm lang, 6mm breit und 2mm hoch. Die Schaumstoffwände ragen über die Kanten des Filtermaterials um mindestens 3 mm hinaus, um die Verschweißung der Filterwände zu ermöglichen. Der dicht verschweißte Stomafilter wird auf der Beutelinnenseite mit einer Gaseinlaßöffnung versehen. Mit einem V- förmigen Prägewerkzeug wird ein 0,2 bis 0,5mm tiefer Strömungskanal zum Gaseinlaß hin in die Schaumstoffwand eingeprägt. Die semipermeable Membran auf PUR-Basis wird an der Schaumstoffwand derart befestigt, daß sie die Gaseinlaßöffnung und den eingeprägten Strömungskanal vollständig flüssigkeitsdicht bedeckt. Letztlich wird an der außen liegenden Schaumstoffwand eine Gasauslaßöffnung eingestanzt. In a preferred embodiment, a filter material made of an open-pore PUR foam support in which an activated carbon powder impregnated with copper salts is fixed is welded on both sides to two closed-pore 1.1 mm thick foam walls at 110 ° C. The filter material is 36mm long, 6mm wide and 2mm high. The foam walls protrude beyond the edges of the filter material by at least 3 mm to seal the filter walls enable. The tightly welded stoma filter is provided with a gas inlet opening on the inside of the bag. A V-shaped embossing tool is used to emboss a 0.2 to 0.5 mm deep flow channel into the foam wall towards the gas inlet. The semi-permeable membrane based on PUR is attached to the foam wall in such a way that it completely covers the gas inlet opening and the impressed flow channel in a liquid-tight manner. Ultimately, a gas outlet opening is punched into the outer foam wall.

Claims

Patentansprüche :Claims:
Anspruch 1 : Stomafilter aus einem porösen, gasdurchlässigen Filtermaterial das zwischen einer gas- und flüssigkeitsundurchlässigen Schicht mit einer Gaseinlaßöffnung und einer gas- und flüssigkeitsundurchlässigen Schicht mit einer Gasauslaßöffnung hermetisch dicht eingebracht ist, dadurch gekennzeichnet, daß mindestens eine der gas- und flüssigkeitsundurchlässigen Schichten gemäß dem Oberbegriff aus einem komprimierbaren Material besteht.Claim 1: Stoma filter made of a porous, gas-permeable filter material which is hermetically sealed between a gas- and liquid-impermeable layer with a gas inlet opening and a gas- and liquid-impermeable layer with a gas outlet opening, characterized in that at least one of the gas- and liquid-impermeable layers according to the The generic term consists of a compressible material.
Anspruch 2: Stomafilter nach Anspruch 1 dadurch gekennzeichnet, daß das gas- und flüssigkeitsundurchlässige komprimierbare Material aus einem geschlossenporigen Schaumstoff, vorzugsweise auf Polyolefm- oder Polyurethanbasis besteht.Claim 2: Stoma filter according to Claim 1, characterized in that the gas- and liquid-impermeable compressible material consists of a closed-pore foam, preferably based on polyolefin or polyurethane.
Anspruch 3 : Stomafilter nach einem der vorherigen Ansprüche dadurch gekennzeichnet, daß über dem gas- und flüssigkeitsundurchlässigen komprimierbaren Material eine gasdurchlässige aber flüssigkeitsundurchlässige Membran angebracht ist.Claim 3: Stoma filter according to one of the preceding claims, characterized in that a gas-permeable but liquid-impermeable membrane is attached over the gas- and liquid-impermeable compressible material.
Anspruch 4: Stomafilter nach einem der vorherigen Ansprüche dadurch gekennzeichnet, daß das gas- und flüssigkeitsundurchlässige Material zur Gaseinlaßöffnung gerichtete Vertiefungen oder Kanäle besitzt. Claim 4: Stoma filter according to one of the preceding claims, characterized in that the gas- and liquid-impermeable material has depressions or channels directed towards the gas inlet opening.
PCT/DE2000/002045 1999-07-02 2000-06-30 Stoma filter WO2001001898A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999130620 DE19930620A1 (en) 1999-07-02 1999-07-02 Ostomy filter
DE19930620.6 1999-07-02

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Publication Number Publication Date
WO2001001898A1 true WO2001001898A1 (en) 2001-01-11

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10226503B4 (en) * 2001-07-26 2004-02-19 Helsa-Werke Helmut Sandler Gmbh & Co. Kg filter means

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE2700372A1 (en) * 1976-01-06 1977-07-14 Coloplast Int As DE-GASING DEVICE FOR FISTULAS AND OTHER BODY OPENINGS
EP0235928A1 (en) * 1986-01-31 1987-09-09 Coloplast A/S Deodorizing filters for ostomy equipment
US4723951A (en) * 1985-07-15 1988-02-09 Craig Medical Products Ltd. Gas filter arrangement for ostomy or ileostomy bags
US5085652A (en) * 1989-06-16 1992-02-04 E. R. Squibb & Sons Pouch with mounting member for removable adhesive filter
GB2247172A (en) * 1990-08-22 1992-02-26 Squibb & Sons Inc Ileostomy bag filter protection arrangement
GB2276324A (en) * 1993-03-08 1994-09-28 Welland Medical Ltd Flatus filter
EP0865778A1 (en) * 1997-03-17 1998-09-23 Bristol-Myers Squibb Company Hygiene and medical products

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Publication number Priority date Publication date Assignee Title
US4411659A (en) * 1982-03-16 1983-10-25 Hollister Incorporated Drainable collection pouch and filter assembly therefor
GB2302028B (en) * 1996-08-29 1997-08-27 Bristol Myers Squibb Co Production of filter elements
DE19750545A1 (en) * 1997-11-14 1999-05-20 Klaus Smolik Colostomy bag with odour-absorption filter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2700372A1 (en) * 1976-01-06 1977-07-14 Coloplast Int As DE-GASING DEVICE FOR FISTULAS AND OTHER BODY OPENINGS
US4723951A (en) * 1985-07-15 1988-02-09 Craig Medical Products Ltd. Gas filter arrangement for ostomy or ileostomy bags
EP0235928A1 (en) * 1986-01-31 1987-09-09 Coloplast A/S Deodorizing filters for ostomy equipment
US5085652A (en) * 1989-06-16 1992-02-04 E. R. Squibb & Sons Pouch with mounting member for removable adhesive filter
GB2247172A (en) * 1990-08-22 1992-02-26 Squibb & Sons Inc Ileostomy bag filter protection arrangement
GB2276324A (en) * 1993-03-08 1994-09-28 Welland Medical Ltd Flatus filter
EP0865778A1 (en) * 1997-03-17 1998-09-23 Bristol-Myers Squibb Company Hygiene and medical products

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