AU2011333994B2 - A pouch for collecting liquid excretions - Google Patents

Description

A pouch for collecting liquid excretions Background The present invention relates to a pouch for collecting liquid excretions, such as, for example, a urostomy pouch for collecting liquid human waste, said pouch comprising a first and second wail sealed together along their periphery defining an inlet top portion and a bottom portion defining a collection chamber, an inlet opening provided in the top portion of the first wall, and an a nti- reflux film provided In the top portion between said first and second walls.

In order to avoid content from refluxing once it has entered the pouch it is well known to provide a non-return valve in the vicinity of the inlet opening through which urine exits the stoma and enters into the pouch. An example of such arrangement is known from EP 1 749 507 A2.

Other examples of non-return vaive arrangements in urine collection pouches are known from US 4,604,095 and US 4,300,560. The non-return valve arrangement comprises the provision of intermediate film portions which are attached to each other inside the pouch to form a valve arrangement which is arranged such that liquid is prevented from leaking through the valve arrangement and back towards the inlet opening. Typically, a valve flap is sealed to the first wall of the pouch and another valve flap is sealed adjacently to the second outer wall film of the pouch. The vaive flaps may be sealed along their distal lower periphery and a further folded film may be attached to prevent back-flush through the valve. The valve flaps or intermediate walls are also welded to each other at a number of discrete spots linearly arranged across the pouch above the collection chamber where the liquid collects. The anti-reflux valve arrangement in the pouch takes up a certain volume inside and thereby limits useful volume of the pouch. The urine pouches are designed as drainage bags with a drainage portion at the bottom with a drain valve close the drainage portion which compensates for the limited volume of the collection pouch. The provision of a non-return valve film arrangement requires subassemblies during manufacture of the pouch prior to assembling the outer walls of the pouch.

Summary of invention In accordance with one aspect of the disclosure a pouch is provided for collecting liquid excretions from the human body with an a nti -reflux arrangement which is simple in manufacture. In accordance with another aspect of the disclosure a urostomy pouch is provided with increased active volume of the pouch.

The disclosure concerns a pouch for collecting liquid excretions for collecting liquid human waste, said pouch comprising a first and second wall sealed together along their periphery defining an inlet top portion and a bottom portion defining a collection chamber, an inlet opening provided in the top portion of the first wall, and an anti-reflux film provided in the top portion between said first and second walls, wherein the anti-reflux film is sealed along its lower periphery to the first wall by an a nti- reflux seal across the first wall, and wherein a plurality of adhesion areas, such as spot welds, are provided above the anti-reflux seal and wherein a plurality of slits are provided in the anti-reflux film between the anti-reflux seal a d the adhesion areas.

Hereby, a pouch design is provided which is simple in manufacture. According to a preferred embodiment, the anti-reflux seal being an arcuate seal which is substantially concave relative to the inlet opening and preferably essentially concentric with the inlet opening. Accordingly, the spot welds and the slits are provided in an arcuate configuration in a predetermined distance from arcuate seal. Hereby the active volume for collecting the liquid is increased since the sides of the pouch is included in the active volume due to the concave arcuate sealing of the anti-reflux device.

In a preferred embodiment, the slits are provided with a concave shape with the arcuate portion facing towards the bottom of the pouch. It is also advantageous to provide the slits in an arcuate configuration across the pouch since this allows for an inclination of the bag, e.g. if the user is sitting or lying down. When the pouch is filled to some extent, the concave arcuate shape allow for fluid to flow through more of the slits even when the bag is inclined than if the slits were provided in a straight line across the pouch.

In a preferred embodiment, a drainage portion is provided in the bottom portion of the pouch. Accordingly, the first and second walls are formed with a distal bottom portion to form the drainage portion of the pouch. The drainage portion may be provided with a drain valve which can be operated by the user to empty the pouch. Alternatively, the drainage portion may include a narrow distal portion which is provided with closure means for fold-up closure of the pouch.

In a preferred embodiment of a pouch for collecting liquid excretions accordi g to the disclosure, a baffle member is provided In the collection chamber In the bottom portion of the pouch. This baffle member may prefera ly comprise a tubular member which is attached to the first and second walls respectively, preferably by a pair of attachment lines, such as heat weldings. Hereby, the liquid content in the pouch is prevented from sloshing and thereby creating discomfort for the user and the bulking out is also restricted. It is particularly found advantageous that attachment lines are tapered having a wider mutual distance at their lowermost ends than at their uppermost ends and prefera ly also with an inward bend at the distal ends of the attachment lines to reduce the strains and stresses on the wall in the vicinity of the attachments and thereby preventing any disrupting tear in the pouch walls.

In a preferred embodiment of a pouch according to the disclosure, a non-woven comfort layer is provided on outer side of the first wall. Similarly, a non-woven comfort layer is provided on outer side of the second wall. This is advantageous since the pouch hereby has a soft appearance which makes it more comfortable for the user to wear just as the non-woven layer has a noise-reducing effect so that the pouch is less noisy during use.

Brief description of the Drawings

In the following, the invention is described In more detail with reference to the accompanying drawings, in which:

Figure 1 is body side view of a pouch according to a first embodiment of the disclosure; Figure 2 is a horizontal cross-sectional view, taken along lines 2-2 of Figure 1, through the bottom portion of the pouch in fig. 1 ;

Figure 3 is a distal side view of the pouch of fig. 1;

Figure 4 is a detailed vertical cross-sectional view, taken along lines 4-4 of Figure 1, through the top section of the pouch of fig. 1;

Figure 5 is a body side view of a pouch according to a second embodiment of the

disclosure; and

Figure 6 is a detailed vertical cross-sectional view, taken along lines 6-6 of Figure 5, through the top section of the pouch of fig. 5. Detailed description

With reference to figures 1 to 4, a first embodiment of a pouch for collecting liquid excretions according to the disclosure is s own. The pouch comprises a body-side first wall 1 and a distal second wall 2 which are sealed along their periphery 3 to form the pouch. In the top section 20 of the pouch, an inlet opening 4 is provided In the first wall 1. An intermediate anti-reflux film 5 is provided in the top section 20 between the first and second walls 1, 2. The anti-reflux film 5 may be sealed to the first wall 1 at its lower periphery 6 and to the first and second walls 1, 2 at their common periphery. The a nti- reflux film 5 covers the opening 4 and the lower seal 6 is provided a certain distance from the opening 4. The lower seal 6 is preferably provided substantially concentric with the inlet opening 4, i.e. the seal 6 expands across the pouch with a concave shape. A number of adhesion areas, such as spot welds 7, are provided in a similar concave arcuate configuration across the pouch and preferably the spot welds 7 are in the same distance above the anti-reflux seal 6. Between the arcuate seal 6 and the spot welds 7 a plurality of slits 8 are provided in the a nti- reflux film 5. The spot welds 7 seal the anti-reflux film 5 to at least the bodyside first wall 1 (as it is the case in the embodiment of fig. 6), but may also seal to the distal second wall 2 of the pouch as shown in fig. 4. When adhering both pouch walls 1, 2 and the anti-reflux film 5 the pouch bulging is limited when the pouch is filled with liquid.

By this construction, a collection chamber for storing the liquid content entering the pouch through the opening is provided below the anti-reflux seal 6 as well as between the antireflux film 5 and the second wall 2. In the lower section 30 of the pouch a baffle member 9 is provided inside the collection chamber, i.e. between the first and second walls 1, 2 (see fig.

2). At the bottom the pouch may be terminated with a drainage valve 10 which is operable by the user for emptying the liquid collected In the pouch. In the drainage portion at the distal lower end of the pouch a reinforcing tape 14 may preferably be applied to both sides of the pouch. The baffle member 9 may be a tubular structure made up by two sheets of film 92 which are joined together by two longitudinal weldings 93. The tubular structure may be provided with a vertical orientation. The tubular baffle member 9 is attached to the first and second walls 1, 2, respectively. These attachments may be in the form of attachment lines 91 extending in a generally axial direction. Preferably the baffle member 9 is attached to each of the pouch walls 1, 2 by two attachment lines 91 which are generally linear and non-parallel with a wider distance at the lowermost ends than at the uppermost ends. In the embodiments shown in the figures, the two attachment lines 91 on each of the walls 1 and 2 are symmetric around the longitudinal centre line of the pouch and the two pairs of attachments 91, i.e. the two attachment lines 91 joining the baffle member 9 and the first wall 1 and the two attachments 91 joining the baffle member 9 and the second wall 2 are identical in shape and position. The film 92 may be made of a laminate of different thermoplastic material with a higher melting point on the sides facing the inside of the baffle than the sides of film 92 facing the pouch walls to ensure that the welding during manufacture does not go all the way through. In a preferred embodiment, the material used for the film 92 is a laminate of polypropylene on the inside and polyethylene on the outside of the film 92. In this configuration, the polyethylene on the sides of the film 92 facing the inner sides of the pouch walls 1, 2 has a melting point of approx. 110°C whereas the polypropylene on the sides of the baffle film 92 forming the inner surfaces of the baffle member 9 has a melting point of about 130-140°C. In fig.4, a schematic cross-section view of the non-return valve arrangement of the pouch of figs.1-3 is shown. The pouch may be attached to the user via coupling means, such as an adhesive wafer 41 which is welded or otherwise fixed to the pouch by the seal 43. The pouch is made up by the bodyside wall 1 and the distal side wall 2 where between an a nti- reflux film 5 is arranged in the area around the opening 4. On the outer surfaces of the first wall 1 a d the second wall 2, non-woven layers 11, 12, respectively, may be provided for the provision of a comfortable pouch with a soft exterior and which reduces noise from the pouch when the user moves. The comfort layer may be sealed to the first wall 1 around the opening 4 by an annular seal 13. The layers of film, i.e. the exterior comfort layers 11, 12, the first and second walls 1, 2 and the intermediate anti-reflux film 5 are joined together at discrete spot welds 7. The position of the arcuate seal 6 of the anti-reflux film 5 to the first wail 1 relative to the spot welds 7 is also shown in fig.4.

Liquid excretions enter into the pouch through the opening 4 a d into inlet chamber defined by the first wall 1 and the anti-reflux film 5 in the upper section of the pouch. The liquid will then flow between the wall 1 and the anti-reflux film 5 and pass the spot welds 7 towards the anti-reflux seal 6. Here, the liquid will pass through the slits 8 (see fig.1) whereby the liquid enters the collection chamber defined in the lower section of the pouch between the first and second walls 1, 2 and in the upper section of the pouch between the anti-reflux film 5 and second wall 2.

With reference to figures 5 a d 5 a second embodiment of a pouch according to the disclosure is shown. The pouch Is similar in its design as In the previously described embodiment, i.e. with a body-side first wail 1 and a distal second wall 2 which are sealed along their periphery 3 to form the pouch. In the top section of the pouch, an inlet opening 4 is provided in the first wall 1. An intermediate anti-ref!ux film 5 may be provided in the top section between the first and second walls 1, 2. The anti-reflux film 5 may be sealed to the first wail 1 at its lower periphery 6 and to the first and second wa!ls 1, 2 at their common periphery. The a nti -reflux film 5 covers the opening 4 and the lower seal 6 is provided a certain distance from the opening 4. The iower seal 6 is preferably provided substantially concentric with the inlet opening 4, i.e. the seal 6 expands across the pouch with a concave shape. A number of spot welds 7 are provided in a similar concave arcuate configuration across the pouch and preferably the spot weids 7 are in the same distance above the antireflux seal 6. Between the arcuate seal 6 and the spot welds 7 a plurality of slits 8 are provided In the anti-reflux film 5. The spot welds 7 seal the anti-reflux film 5 to the bodyside first wall 1. This is advantageous since the amount of active volume in the collection chamber is increased. However, since this may involve the risk that the pouch bulges when being filled with liquid whereby the pouch may become more visible on the user, the peripheral seal 3 may be provided with inwardly protruding widened heat seal portions 31 to ensure a relative flat configuration of the pouch when being filled during use. The pouch may in this embodiment be attached to the user via mechanical coupling mea ns, such as a coupling ring 42, which is welded or otherwise fixed to the pouch by the seal 43.

The slits 8 in both the shown embodiments a re provided with a n a rcuate profile concave relative to the top of the pouch. Hereby, the sl its 8 a re opened by fluid flowing from the opening 4 towa rds the lower section 30 of the pouch. However, liq uid a lready present in the collection chamber in the lower section 30 will prevent the slits 8 from opening whereby the non-return valve effect is achieved . It is also advantageous to provide the slits 8 in an arcuate configuration across the pouch since this a llows for an i nclination of the pouch, e.g . if the user is sitting or lying down. When the pouch is fil led to some extent, the concave arcuate configuration allows for fl uid to flow through more of the slits 8 even when the bag is inclined tha n if the slits 8 were provided in a straight line across the pouch. Thus, the useful volume when the pouch is i ncli ned is increased .

In relation to the description a bove of the present disclosure a d in the following claims terms l ike top, bottom, horizontal, vertical and the like are used to describe the construction of the pouch for collecting l iquid excretions. These terms are merely to be understood as relative terms a nd used in order to facilitate the expla nation of the pouch construction.

Accordingly, It is realised the pouch can be oriented in different directions without departi ng from the scope of the invention as defi ned in the clai ms and that the directiona l terms are merely to be understood In a relative context.

Claims (24)

Claims

1. A pouch for collecting liquid excretions for collecting liquid human waste, said pouch comprising a first and second wall sealed together along their periphery defining an inlet top portion and a bottom portion defining a collection chamber, an inlet opening provided in the top portion of the first wall, and an anti-reflux film provided in the top portion between said first and second walls, wherein the anti-reflux film is sealed along its lower periphery to the first wall by an anti-reflux seal across the first wall, and wherein a plurality of adhesion areas are provided above the antireflux seal and wherein a plurality of slits are provided in the anti-reflux film between the anti-reflux seal and the adhesion areas.

2. A pouch for collecting liquid excretions according to claim 1, wherein said anti-reflux seal being an arcuate seal which is substantially concave relative to the opening and preferably essentially concentric with the inlet opening.

3. A pouch for collecting liquid excretions according to claim 1 or 2, wherein the adhesion areas are provided in an arcuate configuration.

4. A pouch for collecting liquid excretions according to any of the preceding claims, wherein the slits are provided with a concave shape with the arcuate portion facing towards the bottom of the pouch.

5. A pouch for collecting liquid excretions according to any of the preceding claims, wherein a drainage portion is provided in the bottom portion of the pouch.

6. A pouch for collecting liquid excretions according to any of the preceding claims, wherein a baffle member is provided in the collection chamber in the bottom portion of the pouch.

7. A pouch for collecting liquid excretions according to claim 1, wherein said baffle member comprises a tubular member which is attached to the first and second walls respectively by a pair of attachment lines.

8. A pouch for collecting liquid excretions according to claim 7, wherein said attachment lines are heat weldings.

9. A pouch for collecting liquid excretions according to claim 7 or 8, wherein said attachment lines are tapered having a wider mutual distance at their lowermost ends than at their uppermost ends.

10. A pouch for collecting liquid excretions according to any of claims 7 to 9, wherein said tubular baffle member is made of two sheets of thermoplastic film which are sealed together.

11. A pouch for collecting liquid excretions according to claim 10, wherein the two sheets of thermoplastic film of the tubular baffle member is a laminate of different materials, such as polypropylene on the inside of the tubular baffle member and polyethylene on the outside of the baffle member, whereby the baffle sheets have a lower melting point on the sides facing the pouch walls than the melting point of the sides facing each other.

12. A pouch for collecting liquid excretions according to any of the preceding claims, wherein the adhesion areas are spot welds.

13. A method of manufacturing a pouch for collecting liquid excretions, comprising the steps of: providing a first wall of the pouch, providing an inlet opening in the top portion of said first wall, providing an anti-reflux film and sealing said film to the first wall at least along an arcuate lower section in such a manner that the anti-reflux film covers the top portion including the inlet opening of the first wall, providing a second wall which is substantially congruent in form and sealing said second wall along its periphery to the first wall in such a manner that the antireflux film is sandwiched between the first and second walls.

14. A method according to claim 13, wherein the anti-reflux film is provided with slits provided with a concave shape relative to the opening of the pouch with the arcuate portion facing towards the bottom of the pouch.

15. A method according to claim 13 or 14, whereby adhesion areas are provided in an arcuate profile between the slits and the arcuate seal adhering at least the anti-reflux film and the first wall.

16. A method according to claim 15, whereby the adhesion areas are spot weldings.

17. A method according to any of claims 13 to 17, wherein the pouch is provided with a drainage portion with a drainage valve in the distal end thereof.

18. A method according to any of claims 13 to 17, wherein a baffle member is provided in the collection chamber in the bottom portion of the pouch.

19. A method according to claim 18, wherein said baffle member comprises a tubular member which is attached to the first and second walls respectively by a pair of attachment lines, such as heat weldings.

20. A method according to claim 18, wherein said attachment lines are tapered having a wider mutual distance at their lowermost ends than at their uppermost ends.

21. A method according to any of claims 18 to 11, wherein said tubular baffle member is made of two sheets of thermoplastic film which are sealed together.

22. A method according to any of claims 16 to 22, wherein non-woven comfort layer is provided on outer side of the first wall before sealing to the anti-reflux film on the inner side of the first wall.

23. A method according to any of claims 16 to 23, wherein non-woven comfort layer is provided on outer side of the second wall before or simultaneous with sealing the second wall to the first wall and to the anti-reflux film.

24. A method according to any of claims 16 to 24, wherein said anti-reflux seal being an arcuate seal which is substantially concave relative to the opening and preferably essentially concentric with the inlet opening.