CA2113131C - Ostomy bag with multi-stage filter - Google Patents
Ostomy bag with multi-stage filter Download PDFInfo
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- CA2113131C CA2113131C CA002113131A CA2113131A CA2113131C CA 2113131 C CA2113131 C CA 2113131C CA 002113131 A CA002113131 A CA 002113131A CA 2113131 A CA2113131 A CA 2113131A CA 2113131 C CA2113131 C CA 2113131C
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- Prior art keywords
- filter
- waste
- ostomy bag
- protection
- bag
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Classifications
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- 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
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 a gas transmissible protection filter that is impassible to semi-liquid waste material. The protection filter is located in the ostomy bag to precede the deodorizing filter such that gaseous waste must pass through the protection filter before it passes through the deodorizing filter. In one embodiment of the invention wherein the ostomy bag has a single chamber, the protection filter is a two layer structure with different pore counts that overlay the deodorizing filter. In another embodiment of the invention wherein the ostomy bag has dual chambers, the protection filter, without overlaying the deodorizing filter, is disposed across the flow path of gaseous waste to the deodorizing filter such that any gaseous waste that reaches the deodorizing filter must flow through the protection filter. Thus semi-liquid waste material cannot contact the deodorizing filter since it cannot bypass the protection filter to reach the deodorizing filter.
Description
r~
' 21 ~. 31 ~ ~_ ' oe~ "~~s~~'~h~~I ~'Tv~u Hl~CEO~tOO~iD OF ~ g'xVEII~TeI/
Thin invention is di.rect,'~d to ostomy bags and more particularly to an ostomy bag with a navel multi-stage filter that re*ists contact contamination by semi-liquid waste collected in the bag.
Gases emitted from the stoma into an ostomy bag and gases that issue fxom waste material confined in the bag are u$ually evacuated through a deodorizing filter. A gas outlet is thus provided i,a~ the ostomy bag, normally adjacent the deodorizing filter to ensure that the outward flow of gas pass~s through th~ filter.
%st ostomy bags can generally be worn a few days before the deodorizing capability of tho filter begins to 15~ lose :ffeetiveness. The exhausted filter can then be replaced if the bag has provision for replaceable filters as is ostoay bags of U.S. Patent. 5,085,652. If therQ is no provision for filter replacement as in the ostomy bag of U.S.
Patent 5,o74,a51, tho entire bag is disposed of and replaced when the filter is no longer an effective deodorizer.
If the deodorizing filter is inadvertently Conta8~i17ated by contact with waste material that accumulates in the bag, it may be desirable to replace the disposable bag immediately. Waste material contact with a deodorizing filter can occur as a result of physical activity by the 21231~~. . ' . w.
waarar that shifts'the contents of the bag toward the deodorizing filter, especially if such waste material is of a liquid or sami..liquid consistency.
Contact of the deodorizing riltgr with semi-liquid wastw material will oltan slog the filter, thereby prevert~g adec~uats daodorization and avr~cuation of warts gas. Whenever a filter is contaminated~by contact with semi-liquid waste material and such contamination iaapadas the punction of the filter, the filter or bag should ba replaced am soon as possible. The need for accelerated repiaceaent o!
deodorising filters and/or ostomy bags because of contact contamination by waste is usually an inconvenience to the wearer.
Filter contamination Eton contact with semi-liquid waste also commonly occurs when an individual is asleep or reclining because the ostomy bag is in a relatively horizontal orientation. In such instances, gas pressure may build up in the bag because of the lowered rate of gas evacuation due to filter clog. Pressure release can thus occur through an undesirable brea% in the bag ssa~ at the atone. a! the leak or seal break is not detected, it can result in th~ soiling o! an individuals garments.
~t is thus desirable to provide an ostomy bag with a mufti-stags filter system that prevents Semi-liquid waste Zs material lroa~ contaminahing a deodorizing element but does a 21~.3~~~_ not inhibit evacuation of gaseous.wasta through the deodorising element.
O~~~S X11 ,~9~ O! ~ TTffV
Among the several objects of the invention may be noted the provision of a novel ostomy bag, a novel ostomy bag with a protective device for a deodorizing element which prevents semi-liquid waste material from contaminating the deodorizing element while permitting gaseous waste matexial to pass through the deodorizing element, a novel ostomy bag with a novel mufti-stage filter system for gas deodorizing that enables a deodorizing element to resist contact contax~ination by semi-liquid waste material, a novel ostomy bag having dual chambers with one chamber containing a stoma engagement opening and the other chamber containing a gas deodorizing filter, a novel ostomy bag which has a semi-liquid waste collection chamber aced a gas outlet chamber with protection against semi-liquid waste reaching a gas deodorizing filter therein, and a novel method of preventing contamination or a gas deodorizing rilter.
other objects and features of the invention will be in part apparent and in paxt pointed out hereinafter.
In accordance with the invention, the mufti-stage filter includes a gas transmissive protection device for a deodorising element that is impassible to semi-liquid waste 23 material. Tho gas transmissive protection device precedes ~~~~~s~~.
the deodorizing element oT filter such that gaseous waste must pass through the protection device bGgore it passes through the filter.
In one embodiment of the invention, the mufti-stage filter includes a deodorization filter intended to remove odor, a microporous protection film intended to protect the deodorising filter from liquids, an open cell foam barrier to protect the miaroporous film from semi-solid fluids and liquids, and a plastic fluid-impermeable film cover with qas passages that substantially encases the other stages of the mufti-stage filter. The film cover is intended to protect the other stages from the bulk of the somi-solid liquids and allow gas to pass through the gas passages. Thug, the fluid- , impermeable film cover is bonded along a discontinuous bond line, wfth the discontinuities providing access paths for gas to flow through the succeeding stages to the deodorizing filter for eventual evacuation from the ostomy bag.
In another eabodiment of the invention the ostomy bag is a dual chalaber structure with one chamber provided 2o with a waste inlet opening to receive somi-liquid waste and gasQOUS waste. The other chamber is provided with a gas outlet and a mufti-stage lifter having a deodorizing element.
Thai ehanbers era eomwnicable, through a communication port or opening, !or exabyla.
z3 7! mufti-stage filter that is gas transmissible but 21~3~.~~.
impassible to semi-liguid and semi-solid fluid waste is provided in the gas outlet chamber. The mufti-stage filter includes an open cell loam barrier placed across the gas outlet chamber, preferably across the communication opening and the gas outlet chamber. The loam barrier does not overlay the deodorizing filter but is at a different level so as to precede the deodorising filter relative to the flow Path of gaseous waste through the deodorizing filter. Thus gaseous waste must pass through the foam barrier before it passes through the deodorising filter.
The mufti-stage filter further includes a microporous protection film surrounding thn deodorizing slomsnt or filter.
In either embodiment the mufti-stage pilter is impassible to semi-liquid waste material but permits gaseous waste to pass through. Thus the deodorizing filter is protnatnd from being contacted by semi-liquid waste material.
The dsadorizing filter, by avoiding clogging contact with semi-liquid waste material can opexate for its rated life and 2o thsasby enable Chs,ostomy bag to be used !or a normal duration period before filter replacement or bag replacement is required.
The invention accordingly compzises the constructions and method hereinafter described, the scope of the invention being indicated in the claims.
~i~PTIO$ 01 T~ O sllT~t3g rn the accompanying drawings, FTG. 1 is a simplified schematic plan view of one side of an ostomy bag incorporating one embodiment of the frrverrtiona FIG.. x is a simplified schematic plan view o! the r~vsrsr side thereofi FIG. 3 is an enlarged fragmentary, exploded perspective view thereof:
. FIG. 4 is~a section view taken on the line a-s of FIG. It FIG. 5 is a partly broken enlarged fragmentary plan view thereof:
FIG. 6 is a section view taken on the line 6-6 of FIG. 5;
FIG. 7 is a simplified schematic plan view of one side o! another embodiment of tire invention:
FIG. 8 la a si~lified scp~ematic plan view of the rev.rsa side thereoft F7C~i. 9 is a section view taken on the line 9-9 of FIG. 7t and, 1~IG. i0 is an ~nlarged fragmentary section of FIG. 9.
Corresponding reference characters indicate corresponding parts throughout the several views of the zs drawings.
s An ostomy bag incorporating one embodiment of the invention is generally indicated by the reference number 10 in rig. 1. The ostony bag is formed of a suitable known thermoplastic material that is gas impermeable, flexible and expandable.
The back 10 includes a front wall 12 that faces axay from the abdomen, and a rear wall 14 that confronts the abdomen, joined together by a peripheral thermoweld 16. The walls 1Z and i4 are approximately 40 to 10o microns thick.
The bag 10 further includes a top portion 18, a bottom portion x0 with a reclosable open end 22, and opposite side portions 2a and 26. 7~ reusable clamp (not shown) is provided at they bottom portion 20 to open and close the open end 22.
A stoma engagement opening 28 is formed in the rear wall i4 nsaser the tap portion 18 of the bag to than the bottom portion 20. The stoma engagement opening 28 is bordered by a known flexible plastic coupling flange 30 in the fare of a ring joined to an outside surface 32 of the rear arall 14 in any suitable known manner. The coupling tlanga 30 interlocks with a known interlocking ring flange (not shorn) that is provided around the stoma.
An S-shaped gas evacuation slit 36 (Fig. 3) is farmed in the (rant wall portion 12 of the bag 10 near the top and aids edges 18 and a4, offset from the stoma engagement opening 28.
A generally circular deodorizing filter 4U of the type sold under the designation Freudenberg code 9347 by F~reudenberg Industrial of west Yorkshire, England, is provided at an insides surface 42 of the front wall 12 in substantial alignment With the gas evacuation slit 3s. The filter 4o includes a filtration layer 44 (gig. s) formed of polyurethane foam containing activated carbon sandwiched between cover layers 46 and 48. The cover layer 46 is gas permeable and formed of micro-fine nonwoven material with a layer of bot melt adhesive, whereas the cover layer 48 is gas semi-permeable microporous film. Preferably the filter is approximately 24.4 mm. ~ 1 mm. in diameter and 2 to 3 mm.
thick.
The filter 40 is joined to the inside surface 42 of the front wall 12 at a peripheral gas impermeable bonding none 50 (Figs, s and 6) of the cover layer 4s. Heat is applied to the hot-melt adhesive layer at the bonding zone 50 to pxovide a bond width of approximately 8.6 mm. Thus a central circular unbonded area 52 of approximately 7.1 mm, in diametex is defined in the gas permeable cover layer 46 within the confines of the bonding zone so. The unbonded area Sa confronts the evacuation alit 36 in the front wall 12.
Fince the cover layer 48 of the filter 40 is gas 2s samipermeable, gas can only enter the filter 40 at a ~~~~~ei~
p~ripheral edge 58 of the filter 40 (Figs. 5 and 6), ~ porous film 6o formed of ethylene vinyl acetate and provided with a plurality of microporous holes 62 (p~,~.
~) approximately 45 mmt. in diameter, is also joined to the fx~nt wall 1z of the bag at the inside surface 4z along a p8ripheral bonding zone 64 (Figs. 5 and 6) that encircles the filter 40.
A protection filter 70, preferably farmed of open cell PplY~ethane foam of the type made by Foamex under the 0 commercial names protectaire-Z is sandwiched between the porous film 60 and a fluid imperm~able film wafer 72 formed of polyethyleris. The protective filter 70 can be of one pore size such as 40 pores per inch, or the filtat can be a dual layer arrangement with two pore sizes. The stacked arrangement is preferred and includes a layer 71 adjacent the porous film 60 and having approximately 45 pores per inch with a pore diameter of approximately 45 mm. The filter 70 also includes a layer 73 adjacent xhe layer 71 approximately 3.2 mm, thic7~ and having approximately 30 pores per inch with z0 a pora diameter of approximately 45 mm.
Ths fluid impermeable film wafer 72 is joined to the inside surface 43 of the front wall 12 at a discontinuous pariphsral bonding zone 76 that encircles the porous film 60.
Profsrably six equally spaced discontinuities 78 are provided ~1~3~~~~.
in the bonding gone 76 and are approximately 50 mm, in extent.
In operation of the ostomy bag 10, the coupling flange 30 is engaged with a ring-shaped mating coupling flange (not shown) provided around the stoma. The coupling flange engaga~aent loans a substantially leak-tight seal between the bag 10 and the ~ttomm, The apes end 22 of the bottom portion 2o is clamped shut in leak-tight fashion using any suitable known releasable clamp (not shown).
Semi-liquid and gaseous waste material (not shown) are thus allowed to enter a collection chamber 90 (Fig. 6) defined between the front arid rear walls 12 and 14 of the bag 10. The semi-liquid waste and ga8aous waste accumulate in the collection chamber 90 with the gaseous waste being evacuated through t~s deodorising filter 40 and the gas outlet 36.
Before the waste gas reaches the deodorising filter 4o and the gage outlet 36, it must pass through the discontinuities 78 in the bonding acne 74 of the film wafer 72. l1 peripheral edge 80 of the film warier 72 is left unbonded as most clearly shown in Fig. ~, to provide a path for the waste gas to enter the discontinuities 78, as !or example, slang a path indicated by the arrow e2.
As most clearly shown in Fig. 5, the protection filter 70 ist in the path of the discontinuities 78. The lo 21~3~ ~1.
filter 70 will thus block the passage o! semi-liquid Waste material because the filter 70 provides a tortuous path of decreasing pore size that cannot be negotiated toy the semi-liquid waste. The filter also causes bubbles of fluid to 8 form by surface tension. The bubbles of fluid cling to the foam and interrupt the flow of the semi-liquid waste. Body motion by the user results in an ongoing breaking and reforming o! the surface tension bubbles which provides a path for the gas to travel. The semi-liquid waste does not clog the film wafer 72 because of the size and number of the discontinuities 78.
The waste gas thus passes through the protective filter 70 and through the pores 62 of the porous protection film 60 .into an annular peripheral space 84 in the direction indicated by the arrows 92 in Fig. 6. Since a circular portion of the porous proteotion film 60 bounded by the peripheral space 84 is blocked by the gas impermeable cover layer 48 of the filter 40, the waste gas is directed toward the periphery 58 of the filter 4o in the direction indicated by the arrow 92.
Gas =low is than dirocted into the filtration layer 44 asp indicated by the arrows 94 in Fig. 6, toward the central unbonded area 52 between the filter 40 and the front wall 12. The gas outlet slit 36, which aligns with the unbonded area 52, provides an evacuation point for the waste 2~.~.~1~1.
gas to exit from the bag to to the out8ide as indicated by the arrow 95. Under this arrangement, the filter 40 is protected by the filter 70 from contact with semi-liquid waste material since the filter 70 is impassable by semi-.
liquid waste but does not impede the flow of gaseous waste.
The mufti-stage filter system thus includes a series of components namely the deodorizing filter 40, the film 60, the filter 70 and the film 72, that provide contamination protection for the deodorizing filter 40. The components worDc together to provide effective deodorization of flatus and extend the life of the deodorization filter 40.
Another embodiment of the ostomy bag is generally ~.ndicated by the reference number loo in Figs. 7-l0.
Referring to Figs. 9 and 10, the ostoay bag l00 includes a pair of adjacent chamber sections 102 and 104 that communicate with each other through a communication port 106.
The chamber sections 102 and 104, which are commonly joined at the top and sides by a peripheral thermoweld 110, have adjacent top portions 112 and 113. Relatively short side portions 11a and 116 of the chamber section 104 overlap rnlativoly long side portions 115 and 117 of the chamber section 102.
The chamber section 102 has a bottom portion 12o with an open end 122 that is normally maintained in a closed position by a removable clamp (not shown). The chamber v section 104 hasp a bottom portion 124 with a permanently sealed Closed end 126. As most clearly shown in Figs. 7 and S. the bottom portion 124 is elevated from the bottom portion 120 since the chamber 9eCtiori 104 is of Shorter extent than the chamber section 102. It will be noted that the bottom portion 124, which is rearwardly disposed in Fig. 8, is shown in solid lin~ because the bag 100 is preferably transparent.
ttafesring to Figs. 9 and lo, the chamber section 102 has $pacad walls 130 and 132 which dofine a waste collection 1o chan~bar 134. The wall 130 is provided with a stoma engagement opening 28 surrounded by a coupling flange 30.
Ttae chamber section 104 includes spaced walls 140 and 142 which define a gas outlet chamber 1~0. The walls 142 and I32, which era adjacent, need not be bonded together is except at the peripheral thermoweld 110. The wall 132 is shorter at the top portion 112 than the wall 130 and the wall 142 is shorter at the top portion 113 than the wall 140 by the same amount as the wall portiqn 132 to provide the communication port 106.
20 An S~shaped gas outlet slit 36 (Pig. 7) is formed in the wall portion 140. A filter 40 is aligned with the gas outlet Slit 36 and backed up by a porous protection film 60 in the same manner ac previously described for the filter 40 of the bag 30.
28 R protective filter 146 formed of the same open cell 2Ii31~1 material as the protective filter 70 having-approximately 40 pores per inch with a pore diameter of approximately 45 mm.
The filter 14s is disposed across the chamber 150 from the wall 140 to the wall 142 near the top portion 113 in the area of the communication port 106. If desir~ad, thg protective filter 146 can be disposed across the communication port 10s so as to cover the port. The protective filter 14s is thus situated to precede the gas deodorizing filter 40 relative to the outl8t flow path of gaseous waste through the deodori2ing filtor 40 such that any gas flow through the communication port 106 mush pass through the protective filter 146 befoze it reaches the deodorizing filter 40. If de~ired. the gaiter 146 can also be tormed as a two layer struct~.~re in the manner described for the !alter 70.
is A plurality of spaced theratowelds 148 (Fags. 1, 9 and 10) between the wall portions 140 and 142, fix the position of the protective filter 146 rolative to the filter 40 such that no portion of the protection filter i4s overlaps the deodorizing filter 40.
In operation of the ostomy bag 100, the coupling flange 30 is engaged with a mating coupling flange (not shown) provided around the stoma to form a substantially leak-tight seal. The open end 122 of the chamber section 102 at the bottom portion 120 is clamped shut in leak-tight fashion using any suitable known releasable clamp (not 2~i~1 ~~
&hown). Semi-liquid and gaseous waste material (not shown) is thus allowed to enter the collection chamber 134 through the stoma enqagem~~t opening 28.
Semi--liquid waste and gaseous waste accumulate in the collection chamber 134 with the gaseous waste flowing into the gas outlet chamber 150 in the direction indicated by the arrow 154 (Pig. 10) for evacuation through the deodorizing filter 40 and the gas outlet 36.
8afore the confined gaseous waste reaches the l0 deodorizing filter 40 and the gas outlet 36, it must pass through the communication port 106 where it encounters the protective filter i46. The gaseous waste flows along a path defined by the arrows 156 and 158 through t'~Q protective filter 146 and through spaces 160 between the thermowelds 148 as indicated by the arrow 162.
The gaseous waste fills the remainder of the chamber 150 below the protective filter 146 as indicated at th~ arrow 163 in Fig. 10. Gaseous waste then passes through the pores 62 of the protection film 60 into an annular peripheral space 84 surrounding the filter 40 and into the peripheral edge 58 of the filter 40 whets the gas enters the filtration layer 44. Gas flows through the filtration layer 44 toward the center of the falter 40 as indicated by the arrows 164 and 165 for exit through the central unbonded area 52 where it is evas;uated to the outside through the gas outlet 36 as 2I~3~?1 indicated at the arrow 16s.
Should semi-liquid waste reach the communication port 106, it is blocked from passing through by the protective filter 146 for the same reasons described with respect to the filter 70. Thus there is no accumulation of aemi-liquid waste material in the filter 146 which would block passage of gaseous waste. The protective filter 145 essentially isolates the filter 40 from semi-liquid waste material and thus protects the filter 40 from contamination by the semi-liquid waste material.
As will be apparent to those skilled in the art, the arrangement of the protective filter 70 over the deodorizing filter 40 in the ostomy bag 10 or the arrangement of the protective filter 146 across the gas outlet chamber 150 and/or communication port 106 of the ostomy bag 100, is also adaptable to most types of ostomy bags including those that do not have bottom openings.
Some advantages of the invention evident from the foregoing description include an ostomy bag with a mufti-ZO stage filter system ttaat provides contamination protection for a deodorizing filter and helps assure against inadvertent premature contamination of the deodorizing filter by semi-liquid waste material accumulated in the bag. A further advantage of the ostomy bag is that the mufti-stage filter system enables the user to engage in activities or body 2~~.31 ~~
postures that may shilt the contents of the bag, without f~ar that such activities will cause contamination of the d~odorizi7ng filter. a furth~r advantage o! the invention is that the ostvmy bag can be reliably worn !or ite normal rated lire heaause the deodorising filter is not likely to be pr:maturely contaminated by ap~pi-liquid waste material.
In view of the above, it will be seen that the several obfocts of the invention are achieved and other advantageous results attained.
, 71s various changes can ba mado fn the above constructions and method without departing rrom the scope of thg invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall b~ interpreted as illustrative and not iri a limiting aen$e.
' 21 ~. 31 ~ ~_ ' oe~ "~~s~~'~h~~I ~'Tv~u Hl~CEO~tOO~iD OF ~ g'xVEII~TeI/
Thin invention is di.rect,'~d to ostomy bags and more particularly to an ostomy bag with a navel multi-stage filter that re*ists contact contamination by semi-liquid waste collected in the bag.
Gases emitted from the stoma into an ostomy bag and gases that issue fxom waste material confined in the bag are u$ually evacuated through a deodorizing filter. A gas outlet is thus provided i,a~ the ostomy bag, normally adjacent the deodorizing filter to ensure that the outward flow of gas pass~s through th~ filter.
%st ostomy bags can generally be worn a few days before the deodorizing capability of tho filter begins to 15~ lose :ffeetiveness. The exhausted filter can then be replaced if the bag has provision for replaceable filters as is ostoay bags of U.S. Patent. 5,085,652. If therQ is no provision for filter replacement as in the ostomy bag of U.S.
Patent 5,o74,a51, tho entire bag is disposed of and replaced when the filter is no longer an effective deodorizer.
If the deodorizing filter is inadvertently Conta8~i17ated by contact with waste material that accumulates in the bag, it may be desirable to replace the disposable bag immediately. Waste material contact with a deodorizing filter can occur as a result of physical activity by the 21231~~. . ' . w.
waarar that shifts'the contents of the bag toward the deodorizing filter, especially if such waste material is of a liquid or sami..liquid consistency.
Contact of the deodorizing riltgr with semi-liquid wastw material will oltan slog the filter, thereby prevert~g adec~uats daodorization and avr~cuation of warts gas. Whenever a filter is contaminated~by contact with semi-liquid waste material and such contamination iaapadas the punction of the filter, the filter or bag should ba replaced am soon as possible. The need for accelerated repiaceaent o!
deodorising filters and/or ostomy bags because of contact contamination by waste is usually an inconvenience to the wearer.
Filter contamination Eton contact with semi-liquid waste also commonly occurs when an individual is asleep or reclining because the ostomy bag is in a relatively horizontal orientation. In such instances, gas pressure may build up in the bag because of the lowered rate of gas evacuation due to filter clog. Pressure release can thus occur through an undesirable brea% in the bag ssa~ at the atone. a! the leak or seal break is not detected, it can result in th~ soiling o! an individuals garments.
~t is thus desirable to provide an ostomy bag with a mufti-stags filter system that prevents Semi-liquid waste Zs material lroa~ contaminahing a deodorizing element but does a 21~.3~~~_ not inhibit evacuation of gaseous.wasta through the deodorising element.
O~~~S X11 ,~9~ O! ~ TTffV
Among the several objects of the invention may be noted the provision of a novel ostomy bag, a novel ostomy bag with a protective device for a deodorizing element which prevents semi-liquid waste material from contaminating the deodorizing element while permitting gaseous waste matexial to pass through the deodorizing element, a novel ostomy bag with a novel mufti-stage filter system for gas deodorizing that enables a deodorizing element to resist contact contax~ination by semi-liquid waste material, a novel ostomy bag having dual chambers with one chamber containing a stoma engagement opening and the other chamber containing a gas deodorizing filter, a novel ostomy bag which has a semi-liquid waste collection chamber aced a gas outlet chamber with protection against semi-liquid waste reaching a gas deodorizing filter therein, and a novel method of preventing contamination or a gas deodorizing rilter.
other objects and features of the invention will be in part apparent and in paxt pointed out hereinafter.
In accordance with the invention, the mufti-stage filter includes a gas transmissive protection device for a deodorising element that is impassible to semi-liquid waste 23 material. Tho gas transmissive protection device precedes ~~~~~s~~.
the deodorizing element oT filter such that gaseous waste must pass through the protection device bGgore it passes through the filter.
In one embodiment of the invention, the mufti-stage filter includes a deodorization filter intended to remove odor, a microporous protection film intended to protect the deodorising filter from liquids, an open cell foam barrier to protect the miaroporous film from semi-solid fluids and liquids, and a plastic fluid-impermeable film cover with qas passages that substantially encases the other stages of the mufti-stage filter. The film cover is intended to protect the other stages from the bulk of the somi-solid liquids and allow gas to pass through the gas passages. Thug, the fluid- , impermeable film cover is bonded along a discontinuous bond line, wfth the discontinuities providing access paths for gas to flow through the succeeding stages to the deodorizing filter for eventual evacuation from the ostomy bag.
In another eabodiment of the invention the ostomy bag is a dual chalaber structure with one chamber provided 2o with a waste inlet opening to receive somi-liquid waste and gasQOUS waste. The other chamber is provided with a gas outlet and a mufti-stage lifter having a deodorizing element.
Thai ehanbers era eomwnicable, through a communication port or opening, !or exabyla.
z3 7! mufti-stage filter that is gas transmissible but 21~3~.~~.
impassible to semi-liguid and semi-solid fluid waste is provided in the gas outlet chamber. The mufti-stage filter includes an open cell loam barrier placed across the gas outlet chamber, preferably across the communication opening and the gas outlet chamber. The loam barrier does not overlay the deodorizing filter but is at a different level so as to precede the deodorising filter relative to the flow Path of gaseous waste through the deodorizing filter. Thus gaseous waste must pass through the foam barrier before it passes through the deodorising filter.
The mufti-stage filter further includes a microporous protection film surrounding thn deodorizing slomsnt or filter.
In either embodiment the mufti-stage pilter is impassible to semi-liquid waste material but permits gaseous waste to pass through. Thus the deodorizing filter is protnatnd from being contacted by semi-liquid waste material.
The dsadorizing filter, by avoiding clogging contact with semi-liquid waste material can opexate for its rated life and 2o thsasby enable Chs,ostomy bag to be used !or a normal duration period before filter replacement or bag replacement is required.
The invention accordingly compzises the constructions and method hereinafter described, the scope of the invention being indicated in the claims.
~i~PTIO$ 01 T~ O sllT~t3g rn the accompanying drawings, FTG. 1 is a simplified schematic plan view of one side of an ostomy bag incorporating one embodiment of the frrverrtiona FIG.. x is a simplified schematic plan view o! the r~vsrsr side thereofi FIG. 3 is an enlarged fragmentary, exploded perspective view thereof:
. FIG. 4 is~a section view taken on the line a-s of FIG. It FIG. 5 is a partly broken enlarged fragmentary plan view thereof:
FIG. 6 is a section view taken on the line 6-6 of FIG. 5;
FIG. 7 is a simplified schematic plan view of one side o! another embodiment of tire invention:
FIG. 8 la a si~lified scp~ematic plan view of the rev.rsa side thereoft F7C~i. 9 is a section view taken on the line 9-9 of FIG. 7t and, 1~IG. i0 is an ~nlarged fragmentary section of FIG. 9.
Corresponding reference characters indicate corresponding parts throughout the several views of the zs drawings.
s An ostomy bag incorporating one embodiment of the invention is generally indicated by the reference number 10 in rig. 1. The ostony bag is formed of a suitable known thermoplastic material that is gas impermeable, flexible and expandable.
The back 10 includes a front wall 12 that faces axay from the abdomen, and a rear wall 14 that confronts the abdomen, joined together by a peripheral thermoweld 16. The walls 1Z and i4 are approximately 40 to 10o microns thick.
The bag 10 further includes a top portion 18, a bottom portion x0 with a reclosable open end 22, and opposite side portions 2a and 26. 7~ reusable clamp (not shown) is provided at they bottom portion 20 to open and close the open end 22.
A stoma engagement opening 28 is formed in the rear wall i4 nsaser the tap portion 18 of the bag to than the bottom portion 20. The stoma engagement opening 28 is bordered by a known flexible plastic coupling flange 30 in the fare of a ring joined to an outside surface 32 of the rear arall 14 in any suitable known manner. The coupling tlanga 30 interlocks with a known interlocking ring flange (not shorn) that is provided around the stoma.
An S-shaped gas evacuation slit 36 (Fig. 3) is farmed in the (rant wall portion 12 of the bag 10 near the top and aids edges 18 and a4, offset from the stoma engagement opening 28.
A generally circular deodorizing filter 4U of the type sold under the designation Freudenberg code 9347 by F~reudenberg Industrial of west Yorkshire, England, is provided at an insides surface 42 of the front wall 12 in substantial alignment With the gas evacuation slit 3s. The filter 4o includes a filtration layer 44 (gig. s) formed of polyurethane foam containing activated carbon sandwiched between cover layers 46 and 48. The cover layer 46 is gas permeable and formed of micro-fine nonwoven material with a layer of bot melt adhesive, whereas the cover layer 48 is gas semi-permeable microporous film. Preferably the filter is approximately 24.4 mm. ~ 1 mm. in diameter and 2 to 3 mm.
thick.
The filter 40 is joined to the inside surface 42 of the front wall 12 at a peripheral gas impermeable bonding none 50 (Figs, s and 6) of the cover layer 4s. Heat is applied to the hot-melt adhesive layer at the bonding zone 50 to pxovide a bond width of approximately 8.6 mm. Thus a central circular unbonded area 52 of approximately 7.1 mm, in diametex is defined in the gas permeable cover layer 46 within the confines of the bonding zone so. The unbonded area Sa confronts the evacuation alit 36 in the front wall 12.
Fince the cover layer 48 of the filter 40 is gas 2s samipermeable, gas can only enter the filter 40 at a ~~~~~ei~
p~ripheral edge 58 of the filter 40 (Figs. 5 and 6), ~ porous film 6o formed of ethylene vinyl acetate and provided with a plurality of microporous holes 62 (p~,~.
~) approximately 45 mmt. in diameter, is also joined to the fx~nt wall 1z of the bag at the inside surface 4z along a p8ripheral bonding zone 64 (Figs. 5 and 6) that encircles the filter 40.
A protection filter 70, preferably farmed of open cell PplY~ethane foam of the type made by Foamex under the 0 commercial names protectaire-Z is sandwiched between the porous film 60 and a fluid imperm~able film wafer 72 formed of polyethyleris. The protective filter 70 can be of one pore size such as 40 pores per inch, or the filtat can be a dual layer arrangement with two pore sizes. The stacked arrangement is preferred and includes a layer 71 adjacent the porous film 60 and having approximately 45 pores per inch with a pore diameter of approximately 45 mm. The filter 70 also includes a layer 73 adjacent xhe layer 71 approximately 3.2 mm, thic7~ and having approximately 30 pores per inch with z0 a pora diameter of approximately 45 mm.
Ths fluid impermeable film wafer 72 is joined to the inside surface 43 of the front wall 12 at a discontinuous pariphsral bonding zone 76 that encircles the porous film 60.
Profsrably six equally spaced discontinuities 78 are provided ~1~3~~~~.
in the bonding gone 76 and are approximately 50 mm, in extent.
In operation of the ostomy bag 10, the coupling flange 30 is engaged with a ring-shaped mating coupling flange (not shown) provided around the stoma. The coupling flange engaga~aent loans a substantially leak-tight seal between the bag 10 and the ~ttomm, The apes end 22 of the bottom portion 2o is clamped shut in leak-tight fashion using any suitable known releasable clamp (not shown).
Semi-liquid and gaseous waste material (not shown) are thus allowed to enter a collection chamber 90 (Fig. 6) defined between the front arid rear walls 12 and 14 of the bag 10. The semi-liquid waste and ga8aous waste accumulate in the collection chamber 90 with the gaseous waste being evacuated through t~s deodorising filter 40 and the gas outlet 36.
Before the waste gas reaches the deodorising filter 4o and the gage outlet 36, it must pass through the discontinuities 78 in the bonding acne 74 of the film wafer 72. l1 peripheral edge 80 of the film warier 72 is left unbonded as most clearly shown in Fig. ~, to provide a path for the waste gas to enter the discontinuities 78, as !or example, slang a path indicated by the arrow e2.
As most clearly shown in Fig. 5, the protection filter 70 ist in the path of the discontinuities 78. The lo 21~3~ ~1.
filter 70 will thus block the passage o! semi-liquid Waste material because the filter 70 provides a tortuous path of decreasing pore size that cannot be negotiated toy the semi-liquid waste. The filter also causes bubbles of fluid to 8 form by surface tension. The bubbles of fluid cling to the foam and interrupt the flow of the semi-liquid waste. Body motion by the user results in an ongoing breaking and reforming o! the surface tension bubbles which provides a path for the gas to travel. The semi-liquid waste does not clog the film wafer 72 because of the size and number of the discontinuities 78.
The waste gas thus passes through the protective filter 70 and through the pores 62 of the porous protection film 60 .into an annular peripheral space 84 in the direction indicated by the arrows 92 in Fig. 6. Since a circular portion of the porous proteotion film 60 bounded by the peripheral space 84 is blocked by the gas impermeable cover layer 48 of the filter 40, the waste gas is directed toward the periphery 58 of the filter 4o in the direction indicated by the arrow 92.
Gas =low is than dirocted into the filtration layer 44 asp indicated by the arrows 94 in Fig. 6, toward the central unbonded area 52 between the filter 40 and the front wall 12. The gas outlet slit 36, which aligns with the unbonded area 52, provides an evacuation point for the waste 2~.~.~1~1.
gas to exit from the bag to to the out8ide as indicated by the arrow 95. Under this arrangement, the filter 40 is protected by the filter 70 from contact with semi-liquid waste material since the filter 70 is impassable by semi-.
liquid waste but does not impede the flow of gaseous waste.
The mufti-stage filter system thus includes a series of components namely the deodorizing filter 40, the film 60, the filter 70 and the film 72, that provide contamination protection for the deodorizing filter 40. The components worDc together to provide effective deodorization of flatus and extend the life of the deodorization filter 40.
Another embodiment of the ostomy bag is generally ~.ndicated by the reference number loo in Figs. 7-l0.
Referring to Figs. 9 and 10, the ostoay bag l00 includes a pair of adjacent chamber sections 102 and 104 that communicate with each other through a communication port 106.
The chamber sections 102 and 104, which are commonly joined at the top and sides by a peripheral thermoweld 110, have adjacent top portions 112 and 113. Relatively short side portions 11a and 116 of the chamber section 104 overlap rnlativoly long side portions 115 and 117 of the chamber section 102.
The chamber section 102 has a bottom portion 12o with an open end 122 that is normally maintained in a closed position by a removable clamp (not shown). The chamber v section 104 hasp a bottom portion 124 with a permanently sealed Closed end 126. As most clearly shown in Figs. 7 and S. the bottom portion 124 is elevated from the bottom portion 120 since the chamber 9eCtiori 104 is of Shorter extent than the chamber section 102. It will be noted that the bottom portion 124, which is rearwardly disposed in Fig. 8, is shown in solid lin~ because the bag 100 is preferably transparent.
ttafesring to Figs. 9 and lo, the chamber section 102 has $pacad walls 130 and 132 which dofine a waste collection 1o chan~bar 134. The wall 130 is provided with a stoma engagement opening 28 surrounded by a coupling flange 30.
Ttae chamber section 104 includes spaced walls 140 and 142 which define a gas outlet chamber 1~0. The walls 142 and I32, which era adjacent, need not be bonded together is except at the peripheral thermoweld 110. The wall 132 is shorter at the top portion 112 than the wall 130 and the wall 142 is shorter at the top portion 113 than the wall 140 by the same amount as the wall portiqn 132 to provide the communication port 106.
20 An S~shaped gas outlet slit 36 (Pig. 7) is formed in the wall portion 140. A filter 40 is aligned with the gas outlet Slit 36 and backed up by a porous protection film 60 in the same manner ac previously described for the filter 40 of the bag 30.
28 R protective filter 146 formed of the same open cell 2Ii31~1 material as the protective filter 70 having-approximately 40 pores per inch with a pore diameter of approximately 45 mm.
The filter 14s is disposed across the chamber 150 from the wall 140 to the wall 142 near the top portion 113 in the area of the communication port 106. If desir~ad, thg protective filter 146 can be disposed across the communication port 10s so as to cover the port. The protective filter 14s is thus situated to precede the gas deodorizing filter 40 relative to the outl8t flow path of gaseous waste through the deodori2ing filtor 40 such that any gas flow through the communication port 106 mush pass through the protective filter 146 befoze it reaches the deodorizing filter 40. If de~ired. the gaiter 146 can also be tormed as a two layer struct~.~re in the manner described for the !alter 70.
is A plurality of spaced theratowelds 148 (Fags. 1, 9 and 10) between the wall portions 140 and 142, fix the position of the protective filter 146 rolative to the filter 40 such that no portion of the protection filter i4s overlaps the deodorizing filter 40.
In operation of the ostomy bag 100, the coupling flange 30 is engaged with a mating coupling flange (not shown) provided around the stoma to form a substantially leak-tight seal. The open end 122 of the chamber section 102 at the bottom portion 120 is clamped shut in leak-tight fashion using any suitable known releasable clamp (not 2~i~1 ~~
&hown). Semi-liquid and gaseous waste material (not shown) is thus allowed to enter the collection chamber 134 through the stoma enqagem~~t opening 28.
Semi--liquid waste and gaseous waste accumulate in the collection chamber 134 with the gaseous waste flowing into the gas outlet chamber 150 in the direction indicated by the arrow 154 (Pig. 10) for evacuation through the deodorizing filter 40 and the gas outlet 36.
8afore the confined gaseous waste reaches the l0 deodorizing filter 40 and the gas outlet 36, it must pass through the communication port 106 where it encounters the protective filter i46. The gaseous waste flows along a path defined by the arrows 156 and 158 through t'~Q protective filter 146 and through spaces 160 between the thermowelds 148 as indicated by the arrow 162.
The gaseous waste fills the remainder of the chamber 150 below the protective filter 146 as indicated at th~ arrow 163 in Fig. 10. Gaseous waste then passes through the pores 62 of the protection film 60 into an annular peripheral space 84 surrounding the filter 40 and into the peripheral edge 58 of the filter 40 whets the gas enters the filtration layer 44. Gas flows through the filtration layer 44 toward the center of the falter 40 as indicated by the arrows 164 and 165 for exit through the central unbonded area 52 where it is evas;uated to the outside through the gas outlet 36 as 2I~3~?1 indicated at the arrow 16s.
Should semi-liquid waste reach the communication port 106, it is blocked from passing through by the protective filter 146 for the same reasons described with respect to the filter 70. Thus there is no accumulation of aemi-liquid waste material in the filter 146 which would block passage of gaseous waste. The protective filter 145 essentially isolates the filter 40 from semi-liquid waste material and thus protects the filter 40 from contamination by the semi-liquid waste material.
As will be apparent to those skilled in the art, the arrangement of the protective filter 70 over the deodorizing filter 40 in the ostomy bag 10 or the arrangement of the protective filter 146 across the gas outlet chamber 150 and/or communication port 106 of the ostomy bag 100, is also adaptable to most types of ostomy bags including those that do not have bottom openings.
Some advantages of the invention evident from the foregoing description include an ostomy bag with a mufti-ZO stage filter system ttaat provides contamination protection for a deodorizing filter and helps assure against inadvertent premature contamination of the deodorizing filter by semi-liquid waste material accumulated in the bag. A further advantage of the ostomy bag is that the mufti-stage filter system enables the user to engage in activities or body 2~~.31 ~~
postures that may shilt the contents of the bag, without f~ar that such activities will cause contamination of the d~odorizi7ng filter. a furth~r advantage o! the invention is that the ostvmy bag can be reliably worn !or ite normal rated lire heaause the deodorising filter is not likely to be pr:maturely contaminated by ap~pi-liquid waste material.
In view of the above, it will be seen that the several obfocts of the invention are achieved and other advantageous results attained.
, 71s various changes can ba mado fn the above constructions and method without departing rrom the scope of thg invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall b~ interpreted as illustrative and not iri a limiting aen$e.
Claims (22)
1. An ostomy bag for holding body waste that passes through a stoma comprising:
a) an envelope (12,14) formed of flexible plastic sheet material defining a waste collection chamber (90,134) for body waste that includes gaseous and semi-liquid waste material, said envelope having interior surface portions and a top end portion;
b) a waste inlet opening (28) formed in said envelope proximate said top end portion, said waste inlet opening being of predetermined size and including means for fitting said opening around a stoma;
c) gas outlet means (36,136) formed in said envelope proximate said top end portion and spaced from said waste inlet opening;
d) a deodorizing filter (44) joined to said envelope in alignment with said gas outlet means for deodorizing gaseous waste material before said gaseous waste material exits from said bag through said gas outlet means; and e) means in said envelope for protecting said deodorizing filter from contact by semi-liquid waste material, and for permitting the flow of gaseous waste, and for obstructing the flow of semi-liquid waste, said protection means comprising a porous protection film (60) preceding the deodorizing filter, characterized in that the protection means further comprises open cell foam material (70,146) preceding the porous protection film such that the gaseous waste must pass through said open cell foam material, and through the porous protection film before it passes through said filter.
a) an envelope (12,14) formed of flexible plastic sheet material defining a waste collection chamber (90,134) for body waste that includes gaseous and semi-liquid waste material, said envelope having interior surface portions and a top end portion;
b) a waste inlet opening (28) formed in said envelope proximate said top end portion, said waste inlet opening being of predetermined size and including means for fitting said opening around a stoma;
c) gas outlet means (36,136) formed in said envelope proximate said top end portion and spaced from said waste inlet opening;
d) a deodorizing filter (44) joined to said envelope in alignment with said gas outlet means for deodorizing gaseous waste material before said gaseous waste material exits from said bag through said gas outlet means; and e) means in said envelope for protecting said deodorizing filter from contact by semi-liquid waste material, and for permitting the flow of gaseous waste, and for obstructing the flow of semi-liquid waste, said protection means comprising a porous protection film (60) preceding the deodorizing filter, characterized in that the protection means further comprises open cell foam material (70,146) preceding the porous protection film such that the gaseous waste must pass through said open cell foam material, and through the porous protection film before it passes through said filter.
2. An ostomy bag according to claim 1, wherein the porous protection film is a microporous sheet (60).
3. An ostomy bag as claimed in claim 1 or 2 wherein said protection means (60,70) overlaps said filter.
4. An ostomy bag as claimed in claim 3 wherein said protection means (60,70) shrouds said filter.
5. An ostomy bag as claimed in claim 1, 2, 3 or 4 wherein a cover layer (80) covers said protection means, said cover layer being of material which is substantially impervious to fluid.
6. An ostomy bag according to claim 5, wherein said cover layer (80) is joined to said envelope by a discontinuous bond (76) to provide fluid entry ports (78) at the bond discontinuities, said fluid entry ports permitting waste gas to bypass the cover layer and pass through said protection means for subsequent passage through said filter.
7. An ostomy bag as claimed in claim 5 or 6 wherein said filter has a fluid impervious face (48) confronting said protection means an a fluid pervious peripheral edge (58) such that gaseous waste passing through said protection means can only enter said filter at said fluid pervious peripheral edge.
8. An ostomy bag as claimed in claim 1 or 2 wherein said foam material (146) is spaced from said filter such that no part of said foam material overlaps said filter.
9. An ostomy bag as claimed in claim 8 wherein said envelope includes a gas outlet chamber (104) adjacent said waste collection chamber (102) and communicable with said waste collection chamber, said waste inlet opening being provided at said waste collection chamber and said filter being provided in said gas outlet chamber, said protection means being provided in one of said chambers.
10. An ostomy bag as claimed in claim 9 wherein said protection means is provided in said gas outlet chamber (104).
11. An ostomy bag as claimed in claim 10 wherein said foam material (146) is disposed between the top end portion of said envelope and said filter such that no part of said foam material (146) overlaps said filer.
12. An ostomy bag as claimed in claim 9 wherein said waste collection chamber (102) and said gas outlet chamber (104) are communicable at the top end portion of said envelope.
13. An ostomy bag as claimed in claim 12 wherein said waste collection chamber (102) and said gas outlet chamber (104) communicate through a communication port in said envelope, said foam material (146) extending across said communication port.
14. An ostomy bag as claimed in claim 9 wherein said gas outlet chamber (104) is of smaller volume than said waste collection chamber (102).
15. An ostomy bag as claimed in any one of claims 1 to 14 wherein said open cell foam material (70,146) includes a first layer having approximately 12 pores per cm (30 pores per inch), and a second adjacent layer having approximately 18 pores per cm (45 pores per inch), arranged such that gaseous waste passes through said first layer before it passes through said second layer.
16. An ostomy bag as claimed in any one of claims 1 to 14 wherein said open cell foam material is a single layer having approximately 16 pores per cm (40 pores per inch).
17. A method of producing an ostomy bag to prevent contamination of a gas deodorizing filter during use of the ostomy bag, comprising:
a) forming a waste gas outlet (36) in a wall of the bag;
b) bonding a waste gas deodorizing filter (44) to the inside of the bag in alignment with the gas outlet;
c) providing a porous protection film (60) that resists passage of semi-liquid waste but permits passage of gas waste, to precede and cover the inlet of the deodorizing filter; and characterized by:
d) providing a gas transmissible protection filter of open cell foam material (70) for obstructing semi-liquid waste and locating the protection filter in the bag to precede the porous protection film such that gaseous waste in the bag must pass through the protection filter (70) and the porous protection film (60) before it enters the deodorizing filter.
a) forming a waste gas outlet (36) in a wall of the bag;
b) bonding a waste gas deodorizing filter (44) to the inside of the bag in alignment with the gas outlet;
c) providing a porous protection film (60) that resists passage of semi-liquid waste but permits passage of gas waste, to precede and cover the inlet of the deodorizing filter; and characterized by:
d) providing a gas transmissible protection filter of open cell foam material (70) for obstructing semi-liquid waste and locating the protection filter in the bag to precede the porous protection film such that gaseous waste in the bag must pass through the protection filter (70) and the porous protection film (60) before it enters the deodorizing filter.
18. The method of claim 17 including covering the deodorizing filter with the protection filter.
19. A method according to claim 17 or 18 wherein the porous protection film is a microporous film.
20. A method according to any one of claims 17, 18 or 19, further comprising providing an impervious cover layer over the protection filter.
21. The method according to any one of claims 17, 18 or 19 including locating the deodorizing filter and the waste inlet opening in separate chamber sections of the bag that communicate with each other through a communication opening and providing the protection filter in one of the chamber sections.
22
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/004,322 US5306264A (en) | 1993-01-14 | 1993-01-14 | Ostomy bag with multi-stage filter |
| US004,322 | 1993-01-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2113131A1 CA2113131A1 (en) | 1994-07-15 |
| CA2113131C true CA2113131C (en) | 2003-05-20 |
Family
ID=21710200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002113131A Expired - Fee Related CA2113131C (en) | 1993-01-14 | 1994-01-10 | Ostomy bag with multi-stage filter |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5306264A (en) |
| EP (2) | EP0607028B1 (en) |
| JP (1) | JP3590084B2 (en) |
| AT (2) | ATE447385T1 (en) |
| AU (1) | AU673557B2 (en) |
| CA (1) | CA2113131C (en) |
| DE (2) | DE69431608T2 (en) |
| DK (2) | DK1269944T3 (en) |
| ES (2) | ES2185642T3 (en) |
| NO (1) | NO940116D0 (en) |
| ZA (1) | ZA94165B (en) |
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| GB2149306B (en) * | 1983-11-11 | 1987-02-18 | Craig Med Prod Ltd | Ostomy bag |
| GB8503749D0 (en) * | 1985-02-14 | 1985-03-20 | Craig Med Prod Ltd | Gas filter |
| DE3608933A1 (en) * | 1986-03-18 | 1987-10-01 | Kroack Geb Duerr | Stoma bag |
| US4911699A (en) * | 1987-03-16 | 1990-03-27 | Marlen Manufacturing & Development Co. | Deodorizing ostomy pouch |
| NZ227995A (en) * | 1988-03-07 | 1991-12-23 | Squibb & Sons Inc | Ostomy bag with filter: intervening wall has scattered holes |
| US5085652A (en) * | 1989-06-16 | 1992-02-04 | E. R. Squibb & Sons | Pouch with mounting member for removable adhesive filter |
| US5250042A (en) * | 1990-02-20 | 1993-10-05 | E. R. Squibb & Sons, Inc. | Ostomy bag with filter combination |
| GB2247172B (en) * | 1990-08-22 | 1994-08-31 | Squibb & Sons Inc | Ileostomy bag |
-
1993
- 1993-01-14 US US08/004,322 patent/US5306264A/en not_active Expired - Lifetime
-
1994
- 1994-01-10 CA CA002113131A patent/CA2113131C/en not_active Expired - Fee Related
- 1994-01-11 ZA ZA94165A patent/ZA94165B/en unknown
- 1994-01-12 DK DK02018188.9T patent/DK1269944T3/en active
- 1994-01-12 EP EP94300197A patent/EP0607028B1/en not_active Expired - Lifetime
- 1994-01-12 DE DE69431608T patent/DE69431608T2/en not_active Expired - Lifetime
- 1994-01-12 DE DE69435248T patent/DE69435248D1/en not_active Expired - Lifetime
- 1994-01-12 ES ES94300197T patent/ES2185642T3/en not_active Expired - Lifetime
- 1994-01-12 AT AT02018188T patent/ATE447385T1/en not_active IP Right Cessation
- 1994-01-12 AT AT94300197T patent/ATE226807T1/en not_active IP Right Cessation
- 1994-01-12 DK DK94300197T patent/DK0607028T3/en active
- 1994-01-12 ES ES02018188T patent/ES2352951T3/en not_active Expired - Lifetime
- 1994-01-12 EP EP02018188A patent/EP1269944B1/en not_active Revoked
- 1994-01-13 NO NO940116A patent/NO940116D0/en unknown
- 1994-01-13 AU AU53149/94A patent/AU673557B2/en not_active Ceased
- 1994-01-14 JP JP00247494A patent/JP3590084B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0607028B1 (en) | 2002-10-30 |
| ES2185642T3 (en) | 2003-05-01 |
| JP3590084B2 (en) | 2004-11-17 |
| US5306264A (en) | 1994-04-26 |
| NO940116D0 (en) | 1994-01-13 |
| ATE226807T1 (en) | 2002-11-15 |
| JPH06277245A (en) | 1994-10-04 |
| AU673557B2 (en) | 1996-11-14 |
| EP0607028A1 (en) | 1994-07-20 |
| CA2113131A1 (en) | 1994-07-15 |
| ATE447385T1 (en) | 2009-11-15 |
| ZA94165B (en) | 1994-07-11 |
| DE69435248D1 (en) | 2009-12-17 |
| EP1269944A2 (en) | 2003-01-02 |
| AU5314994A (en) | 1994-07-21 |
| DK0607028T3 (en) | 2003-02-24 |
| ES2352951T3 (en) | 2011-02-24 |
| EP1269944A3 (en) | 2004-02-18 |
| DE69431608T2 (en) | 2003-06-26 |
| DK1269944T3 (en) | 2011-01-10 |
| EP1269944B1 (en) | 2009-11-04 |
| DE69431608D1 (en) | 2002-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20140110 |
|
| MKLA | Lapsed |
Effective date: 20140110 |