Ostomy appliance

Abstract

An ostomy appliance 1 comprises an inner wall 2 and an outer wall 3 that define a cavity for containing a stomal output. The cavity comprises a burstable container, 9 such as a bubble of bubble wrap.

Description

Technical Field The present disclosure relates to an ostomy appliance for managing effluent from a stoma; to a kit comprising an ostomy appliance and a container of lubricant therefor, and to methods of lubricating ostomy appliances. Background of the disclosure There are many forms of ostomy appliance which try to provide a secure, comfortable fit for ostomates. Most ostomy appliances comprise a pouch formed of (at least) two walls of film material, which define a cavity for receiving stomal output. In this specification, th term “stomal output” refers to any gases or fluids or solids produced by an ostomate that may be secreted from the stoma or that exit the stoma. The stomal output may comprise stomal gas, stomal liquid and stomal solids. Ostomy appliances are commonly configured as closed appliances or open appliances. In this specification a “closed appliance” refers to an appliance where it is not intended that stomal output is drained from the cavity. Thus, a closed appliance may typically be configured as a one-use, disposable and non-reusable appliance. In this specification an “open appliance” refers to an appliance where it is intended that stomal output is drained from the cavity. Thus, an open appliance may be configured as a reusable appliance, such that it can be reused and emptied multiple times whilst attached to the body, although this is not essential. In an open appliance the stomal output may be drained intermittently as instigated by an action of the ostomate or may be drained intermittently or continuously due to the cavity being fluidly connected to a drain, for example a night drain line. One problem affecting both open and closed appliances is the phenomenon of “pancaking” where the stool sticks to the inside of the pouch and causes problems like skin irritation or filter clogging. One particular concern is build up of stool around the stoma, that can compromise the seal. One approach to address this problem is to apply lubricant to the inside of the pouch. Various lubricants are readily available, for example, the Esenta (RTM) lubricating deodorant available from ConvaTec Ltd of Deeside, UK; the Brava (RTM) lubricating deodorant available from the Coloplast Group (of Denmark); and the Adapt lubricating deodorant available from Holister Inc. of Illinois, USA. An exemplary composition (for the Holister Adapt lubricant) is purified water, propylene glycol, poloxamer 188 nf, n-ethyl-n-soya morpholinium ethosulfate, hydroxyethylcellulose, octoxynol-9, phenoxyethanol, methylparaben, ethylparaben, butylparaben, propylparaben, isobutylparaben, sodium hydroxide. These lubricants are generally available either in bottles, or in individual sachets and are typically introduced into the ostomy appliance through its stomal inlet then manipulated through the walls of the pouch to spread the lubricant around the cavity. Summary of the disclosure In this specification, the term “stoma” refers to an opening in the body. Generally, the stoma is a surgical opening in the torso of the body. In some instances, the term “stoma” also refers to internal tissue, organs or portions thereof that are exposed by the opening. By way of non-limiting example, internal tissue may be selected from colon, ileum, small intestine, large intestine, jejunum, and duodenum, and combinations thereof. The internal tissue may be an end or a loop of a small or large intestine. In this specification, the term “ostomate” refers to a subject that may have use of the ostomy appliance disclosed herein. While ostomate usually refers to a subject with a surgical opening, as used herein, “ostomate” may refer to a subject who has a stoma, regardless of whether the stoma was created by surgery or other means. The term “user” may refer to an ostomate, or to another person assisting the ostomate, for example, with emptying of th stomal output from the cavity. In this specification, the ostomy appliances disclosed herein may, for example, be used for managing a stoma created by an esophagostomy, a gastrostomy, a cholecystostomy, a choledochostomy, a cecostomy, a colostomy, a duodenostomy, an ileostomy, a jejunostomy, an appendicostomy, a tracheostomy, a urostomy, a nephrostomy, an ureterostomy, or a vesicostomy. The ostomy appliances disclosed herein may be used with additional devices including, but not limited to, a shunt, a catheter, a plug or a fecal management system. Beneficially, the ostomy appliances of the present disclosure may permit an ostomate to increase the period of use of each ostomy appliance compared to prior art appliances. This may be achieved, for example, by reducing the possibility of pancaking and the consequent need to dispose of an ostomy appliance before it is full. Additionally or alternatively, this may also be achieved by improving means for draining the cavity of stomal output reliably and hygienically so as to increase an ostomate’s confidence in reusing the ostomy appliance compared to some prior art appliances. Since the ostomate may be inclined to use each ostomy appliance of the present disclosure for longer, the total number of ostomy appliances used by the ostomate in a given time period may be reduced. This may produce an environmental benefit in reducing the amount of environmental waste produced. In this specification locations and orientations of features may be described with reference to the ostomy appliance being “in use”. Such terms refer to the intended orientation of the ostomy appliance when it is adhered to a body of an ostomate with the ostomate in a standing position, irrespective of whether the ostomy appliance is currently performing such a use or the actual position of the ostomate. The terms “upper” and “lower” and related terms refer to the relative position of a part or portion of the ostomy appliance when orientated as it would be in use. For example, a section of the ostomy appliance may be referred to as an “upper” section of the ostomy appliance. In such an example, said section will be intended to be the uppermost section (in the vertical direction) of the ostomy appliance when attached to the body of a standing ostomate. However, the reader skilled in the art will appreciate that before attachment to the ostomate said section may not always be the uppermost section and in addition when attached the section may not always be the uppermost section if the ostomate adopts a non-standing position, for example lying down. In this specification the terms “inner” and “outer” refer to the relative position of a part or portion of the ostomy appliance with reference to the body of an ostomate when the ostomy appliance is attached to the body. “Inner” refers to a position relatively closer to the body of the ostomate than a comparative position that is “outer”. “Outer” refers to a position relatively further away from the body of the ostomate than a comparative position that is “inner”. Ostomy appliances are commonly attached to the body by means of an ostomy wafer which includes an adhesive layer or layers. The ostomy wafer typically has an opening for the stoma sometimes referred to as a starter hole which may be cut to a required size by a user before attachment. The ostomy wafer typically comprises an adhesive layer on a body-facing side for adhering the ostomy wafer to the body of the ostomate. Typically, a release liner covers a body-facing side of the ostomy wafer that is removed by the user prior to fitting to the skin. In this specification, the term “ostomy wafer” may be used interchangeably with the term “wafer”. In this specification, the term “ostomy wafer” includes ostomy wafers for a “two-piece appliance” and for a “one-piece appliance”. In this specification a “two-piece appliance” refers to an appliance where the ostomy wafer forms part of a separate body fitment component that is attached by a releasable coupling to a pouch appliance. A two-piece appliance permits the body fitment component to be separated from the pouch appliance without damage, so that at least one of the parts continues to be functionally usable. For example, the body fitment component may remain in place on the body of the ostomate. In this specification a “one-piece appliance” refers to an appliance where the ostomy wafer is permanently attached to the appliance, to the extent that the ostomy wafer cannot easily be separated without risk of damaging the appliance. A one-piece appliance is intended to be used as an integral unit. In a broad aspect, the invention provides an ostomy appliance. The ostomy appliance may comprise an inner wall and an outer wall. The ostomy appliance may comprise a cavity for containing a stomal output. The inner wall and the outer wall may define the cavity. The cavity may comprise a container. The container may be rupturable. The container may be burstable. The container may contain a lubricant. In one aspect the present disclosure provides an ostomy appliance comprising an inner wall and an outer wall that define a cavity for containing a stomal output; wherein the cavity comprises a burstable container, the burstable container containing a lubricant. As compared to the known approaches for lubricating the cavity of an ostomy appliance, providing a container containing the lubricant within the cavity is more convenient than providing a separate bottle or sachet of lubricant. As the container is burstable, it can be burst in-situ within the cavity, reducing the prospect of a user spilling lubricant on their hands (which would obviously make subsequent handling of the ostomy appliance, and its attachment to the body, more difficult). The lubricant may be a lubricating deodorant. The lubricant may be a liquid. The container may further contain a gas, such as air or nitrogen, such that when squeezed, the burst is a more satisfyingly explosive “pop". The container may be configured to burst when squeezed through the walls of the ostomy appliance. The ostomy appliance may be provided with indicia overlying the location of the container to indicate where to squeeze. Alternatively / additionally, at least one wall may be transparent such that the container can be seen through the transparent wall. The outer wall may be transparent, while the inner wall may be opaque and / or covered with a comfort layer which would conceal the container. The outer wall could of course also be provided with a comfort layer, with an opening in the comfort layer to allow the container to be seen. Arrangements of comfort layers with openings are well known in the art, to allow users to inspect the contents of the cavity. The container may be configured to resist bursting when squeezed at a force of 1N or less; the container may be configured to resist bursting when squeezed at a force of 5N or less; the container may be configured to resist bursting when squeezed at a force of 10N or less; the container may be configured to resist bursting when squeezed at a force of 15N or less; the container may be configured to resist bursting when squeezed at a force of 25N or less; the container may be configured to resist bursting when squeezed at a force of 35N or less; the container may be configured to resist bursting when squeezed at a force of 40N or less; the container may be configured to resist bursting when squeezed at a force of 50N or less. Appropriate selection of a force which the container will withstand can avoid accidental bursting during manufacture, or in transit. The container may be configured to burst when squeezed with a force of 10N or more; the container may be configured to burst when squeezed with a force of 15N container may be configured to burst when squeezed with a force of 20N container may be configured to burst when squeezed with a force of 25N container may be configured to burst when squeezed with a force of 30N container may be configured to burst when squeezed with a force of 40N or more; the or more; the or more; the or more; the or more; the container may be configured to burst when squeezed with a force of 50N or more; the container may be configured to burst when squeezed with a force of 100N or more; the container may be configured to burst when squeezed with a force of 150N or more; the container may be configured to burst when squeezed with a force of 200N or more. Appropriate selection of a force at which the container will burst, allows for bursting under suitable conditions. For example, a 2008 study (Ziv E, Patish H, Dvir Z. Grip and pinch strength in healthy subjects and patients with primary osteoarthritis of the hand: a reproducibility study. Open Orthop J. 2008 May 9;2:86-90. Doi: 10.2174 / 1874325000802010086. PMID: 19478930; PMCID: PMC2687110.) comparing the pinch strength of women with primary osteoarthritis and healthy women revealed a low for two point pinch strength of 2.3 kg force (approximately 23N) for women with primary osteoarthritis, suggesting that most, if not all users should be able to apply a bursting force of at least 20N with just a finger and thumb. The same study had a maximum pinch strength (key pinch) for healthy subjects of 4.9 (approximately 48N), suggesting that any more than 50N would be hard to achieve with the digits, but could be achieved with a grip (where even the lowest score was 15 kg force (approximately 150N)). Of course, higher forces could be achieved using other means, and in one embodiment a high bursting force (e.g. 150N, 200N, 500N or more) could be selected (and as such, the container could be configured to resist bursting when squeezed at a force of 150N or less; 200N or less, or 500N or less) and the container could be burst prior to sale. For example, during a manufacturing process, a burstable container could be introduced into the cavity, then the container could be burst during manufacture and allowed to flow through the cavity, e.g. by capillary action, such that the user need not manipulate the pouch to spread the lubricant through the cavity. Preferably, the container is a burstable capsule, configured to burst in response to squeezing alone. For example, in one preferred embodiment the burstable capsule may be a bubble of bubble wrap. In another embodiment, the burstable capsule could be of the type well known in the field of liquid washing detergents. For example, the capsule could be a water-soluble container as described in WO2004 / 005156 A1, with one or more discrete chambers for containing product, but where the product is lubricant, rather than a detergent composition. A water soluble chamber may be advantageous as it would automatically dissolve when contacted by liquid stomal output. In another embodiment, the container may be a snap-to-burst dispensing package. For example the snap to burst dispensing package may include a plastic backing having a first elastic limit and a shear modulus sufficient to maintain the package in a substantially flat configuration; a first score extending at least partially into the first side of the plastic backing; a coating formed on a second side of the plastic backing having a second elastic limit that is greater than the first elastic limit; a pouch formed on the second side of the plastic backing that is adapted to carry the contents of the package. Flexure of the plastic backing by a first amount is sufficient to cause the plastic backing to exceed the first elastic limit and break along the first score while flexure to a folded position is insufficient to cause the coating to exceed the second elastic limit. Such products are described in more detail in US2010065582A1 (Tapemark Company) and sold under the Snap and Snapplicator trademarks. The burstable container may be of any shape, but particularly preferred is a generally cylindrical shape, for example a cylinder with a domed top. Preferably a generally cylindrical shape with a greater base diameter than height. Such a shape may be recognised as a “button”. As such, a user will be more likely to recognise that the “button” should be pressed to burst the container and release the lubricant. The burstable container may contain at least 0.1ml, 0.2ml, 0.25 ml, 0.5ml, 1ml, 2ml, 3ml, 4ml of 5ml of lubricant. The burstable container may contain no more than 10ml, 8ml, 5ml, 4ml, 3ml, 2ml, 1ml, 0.75ml, 0.5ml or 0.3ml. Naturally, provided the amount of lubricant is effective, the smaller the better, to reduce the space occupied in the cavity. One preferred range is 0.2ml to 0.3ml. This can be accommodated by a small bubble of bubble wrap, typically having a height of about 4mm, a base diameter of about 10mm, and therefore a volume of about 0.31ml. Another preferred range is 3ml to 4ml. This can be accommodated by a large bubble of bubble wrap, which typically has a height of about 9mm, a base diameter of about 25mm and therefore a volume of about 4.4ml. A further optional range is 5ml to 8ml. Such a quantity can be accommodated by an extra large bubble of bubble wrap, which typically has a height of about 12mm and a base diameter of about 30mm and therefore a volume of about 8.5ml. The appliance may contain a plurality of burstable containers containing lubricant. For example, the appliance may contain 2, 3, 4, 5, 6, 7, 8, 9, 10 or more burstable containers. The appliance may comprise an assembly of burstable containers containing lubricant For example, the appliance may comprise an array of containers containing lubricant. In this embodiment it is particularly advantageous if the burstable container is a bubble of bubble wrap. In such an arrangement, the cavity may contain a section of bubble wrap comprising multiple bubbles, each filled with lubricant. Of course, where the appliance contains a plurality of burstable containers containing lubricant, at least one, more than one, or each of the burstable containers containing lubricant may have the features (such as size, structure, type, arrangement in relation to indicia etc.) described above in relation to the container of lubricant. The (or more than one, or each) container may be affixed to the inner wall or the outer wall. Indeed, provision of one or more containers on each of the inner wall and the outer wall is also possible. For example, the (or more than one, or each) container may be glued or welded to the inner wall or the outer wall. Fixing the position of the container will aid bursting of it as it will not move around in the cavity when squeezed. In an alternative, the container may be formed integrally with the inner wall or the outer wall of the container. For example, the container may comprise a first wall and a second wall defining a chamber containing the lubricant and a first wall may be provided by a part of the inner or outer wall. This could be achieved for example by attaching (e.g welding) a recessed second wall to the inner or outer wall, such that the chamber is defined by the recessed portion of the second wall and the first wall, and introducing a lubricant into the chamber (then optionally sealing the chamber, e.g. by heat sealing or gluing). The integral container could of course be formed in the inner / outer wall prior to the joining of the inner wall to the outer wall. The (or more than one, or each) container may be arranged at any location in the cavity. For example, in the top half, or the bottom half (or indeed half-way), to the left hand side, or the right hand side, or alternatively centrally. The ostomy device may be a closed appliance (without a drain). The ostomy appliance may be an open appliance (with a drain). The inner wall and the outer wall may be joined together by a single continuous edge seal. The ostomy appliance may be a closed appliance and the single continuous edge seal may form a closed peripheral seal. The single continuous edge seal may thus define the shape of the cavity. Alternatively, the ostomy appliance may be an open appliance and the single continuous edge seal may extend from a left-hand edge of a drain aperture to a right-hand edge of a drain aperture. The single continuous edge seal may thereby define both the shape of the cavity and the shape of the drain with which the cavity communicates. The single continuous edge seal maybe a weld, optionally a weld having a width of 3mm to 5mm, optionally of 4mm. Preferably, where the ostomy appliance is a closed appliance, the appliance comprises only one burstable container containing lubricant. On the other hand, where the ostomy appliance is an open appliance, the appliance preferably comprises a plurality of containers. This will allow the cavity to be lubricated once, before use, by bursting a first one of the plurality of containers, then, after draining, to lubricate the cavity again by bursting a second one of the plurality of containers (and so on) before its next use. Notably, in addition to avoiding pancaking, lubrication between use of an open appliance will improve the draining of the cavity, leaving less stomal output attached to the surface of the cavity, or in the drain, reducing odour and allowing for more uses per appliance. Obviously the more burstable containers are included in the appliance, the longer it can be used. However, the number of containers must be balanced against the volume in the cavity that they will occupy, and the knock-on effects in terms of bulkiness of the appliance. The inner wall and the outer wall may be formed from flexible sheet material. Optionally, the flexible sheet material of the inner wall and / or the outer wall may comprise a single layer or a laminate of a plurality of layers. Optionally, the flexible sheet material of the inner wall and / or the outer wall may comprise polyvinylidene chloride (PVDC) and / or ethylenevinyl acetate (EVA). Optionally, the inner wall and / or the outer wall may have a thickness of 50 to 150 micrometres, optionally 75 to 100 micrometres. The ostomy appliance may further comprise either an ostomy wafer that comprises a stomal inlet and is arranged in register with an inlet of the inner wall, or a releasable coupling that is located in register with an inlet of the inner wall and that is configured for coupling with a body fitment component comprising an ostomy wafer. The ostomy wafer may be configured for a one-piece appliance or a two-piece appliance. The ostomy wafer may extend through the wafer aperture of the inner comfort layer. The ostomy wafer may have a general oval or diamond shape. The ostomy appliance may further comprise at least one comfort layer overlying at least one of the inner wall and the outer wall. The ostomy appliance may comprise an inner comfort layer and / or an outer comfort layer. The outer comfort layer may comprise a first part and a second part which may be joined to the outer wall so that the first part partially overlaps the second part in an overlap region. The first part and the second part may be separable from each other in the overlap region to form a window opening for viewing the cavity. The overlap region may be angled to extend horizontally when the ostomy appliance is in use. The first part and the second part of the outer comfort layer may be configured to slide over each other in the overlap region to accommodate expansion of the underlying outer wall. The first part and the second part may be joined to each other at a first end and at a second end of the overlap region. The first part and the second part may be welded to each other at the first end and at the second end of the overlap region, optionally as part of a peripheral weld of the ostomy appliance. Optionally, external edges of the one or more parts of the outer comfort layer are shaped and sized to be in register with the outer wall. The (or more than one, or each) burstable container may be arranged in the overlap region. As such, when the first and second parts are separated, the (or more than one, or each) burstable container will be readily seen. The inner comfort layer may comprise a single part or multiple parts. Optionally, the inner comfort layer may cover only a portion of the inner wall. However, preferably the inner comfort layer covers all of the inner wall (except for the inlet for receiving the stomal output into the cavity). Optionally, the inner comfort layer may be shaped and sized to be in register with the inner wall. Optionally, the inner comfort layer may be provided with a wafer aperture that is in register with the inlet of the inner wall to permit fluid connection of the inlet of the inner wall to an ostomy wafer. The at least one comfort layer may be formed from a flexible sheet material. The material of the flexible sheet material may comprise one or more of polyester, nylon, viscose, polyurethane, polyethylene, polypropylene, polyvinylidene chloride (PVDC) and ethylenevinyl acetate (EVA). The at least one fabric layer may comprise a woven or a non-woven textile layer. The fabric layer may comprise polyester, nylon, viscose, polyethylene or polypropylene. The cavity may be a single volume or may be sub-divided into two or more volumes. For example, the two or more volumes may be separated by partitions, wall members, filter elements, etc. The cavity may be provided with a gas vent for venting of stomal gases from the cavity. The ostomy appliance may be provided with an odour filter for reducing the release of unwanted odours from the cavity. The ostomy appliance may comprise a separation wall for filtering gases and / or liquids from solid matter contained in the stomal output. For example, the inner wall may comprise a stomal inlet and the outer wall comprise a gas vent; and the separation wall may be provided between the inner and outer walls forming separate first and second chambers and comprising a liquid and gas permeable separation filter; wherein, in use: the first chamber is arranged to receive stomal output directed into the ostomy appliance via the stomal inlet; the separation filter is arranged to communicate, from the stomal output in the first chamber, stomal liquid and stomal gas to the second chamber; and the gas vent is arranged to allow the stomal gas to migrate from the second chamber to outside of the ostomy appliance. The (or more than one, or each) container may be provided in the first chamber. In another example, the inner wall may comprise a stomal inlet for receiving stomal output and the outer wall may comprise a gas vent; the separation wall may comprise a liquid and gas permeable separation filter; and the ostomy appliance comprises a stomal output flow path for directing stomal output from the stomal inlet to the first chamber, a liquid flow path for directing stomal liquid from the stomal output in the first chamber to the second chamber via the separation filter and a gas flow path for stomal gas to migrate from the stomal output in the first chamber to the gas vent via the separation filter and second chamber. In use stomal output may be received through the stomal inlet and communicated to the first chamber. The separation filter may filter stomal gas and stomal liquid from the stomal output and communicate the stomal gas and stomal liquid to the second chamber. The gas vent may release the stomal gas from the second chamber. According to another broad aspect of the invention there is provided a container of lubricant for introduction into and lubrication of a cavity of an ostomy appliance. In any aspect or embodiment, the ostomy appliance and / or the container of lubricant may have any of the features described in relation to the aspects of the invention above. In particular, the container may be rupturable. More specifically the container may be burstable. Accordingly, one embodiment of the invention provides a burstable container of lubricant for lubrication of a cavity of an ostomy appliance; the burstable container of lubricant being suitable for insertion into a cavity of an ostomy appliance. In a particularly preferred embodiment, there is provided a burstable capsule of lubricant for lubricating a cavity of an ostomy appliance, the burstable capsule being suitable for introduction into a cavity of an ostomy appliance; wherein the capsule is a bubble of bubble wrap. In use bursting the bubble releases lubricant into the cavity. The container may be small enough to introduce into a cavity of an ostomy appliance through a stomal inlet or starter hole. For example, the container may have a maximum width of no more than 20mm and a maximum depth of no more than 20mm. The container may be sized to allow it to be introduced through a hole of 20mm diameter, this is a typical diameter for the starter hole of an ostomy wafer, which forms the stomal inlet of a one-piece appliance. In another particularly preferred embodiment there is provided an assembly of burstable capsules of lubricant for lubricating a cavity of an ostomy appliance; the assembly being suitable for introduction into a cavity of an ostomy appliance. The assembly may be formed by an array of bubble wrap containing the lubricant. In use, bursting each capsule releases lubricant into the cavity. The assembly may be small enough to introduce into a cavity of an ostomy appliance through a drain aperture. For example, the assembly may have a maximum width of no more than 30mm and a maximum depth of no more than 15mm. The assembly may be sized to allow it to be introduced through a drain aperture formed by two opposing layers of film, having an opening therebetween of 40mm wide, this is a typical width for drain of an open appliance. Of course, separation of the layers of film reduces the width, whilst increasing the depth of the aperture / channel through which the assembly is to be introduced. The invention also provides a kit, the kit comprising an ostomy appliance and a container of lubricant for lubrication of a cavity of the ostomy appliance, the container being suitable for insertion into the ostomy appliance. Again, of course, the ostomy appliance and / or the container may include any of the optional features described in relation to any of the other aspects of the invention. The present disclosure also provides a method of manufacturing an ostomy appliance comprising providing a container of lubricant in a cavity of an ostomy appliance. Again, of course, the ostomy appliance and / or the container may include any of the optional features described in relation to any of the other aspects of the invention. The present disclosure also provides a method of lubricating the cavity of an ostomy appliance, the method comprising bursting a container of lubricant inside the cavity of the ostomy appliance. Again, of course, the ostomy appliance and / or the container may be as defined in any of the aspects above, optionally including any optional features. In one embodiment the method further comprises the step of attaching an ostomy wafer of a one-piece appliance as described herein over the stoma. In another embodiment the method further comprises attaching an ostomy wafer of a body fitment component of a two-piece appliance as described herein over the stoma; and attaching a pouch appliance as described herein to the body fitment component. The pouch appliance may be attached to the body fitment component before or after the ostomy wafer has been attached over the stoma. Brief description of the drawings One or more embodiments of the disclosure will now be described, by way of example only, with reference to the accompanying drawings in which: Figure 1 is a front view of an embodiment of an ostomy appliance according to the present disclosure; Figure 2 is a cross-sectional side view of the ostomy appliance of Figure 1; Figure 3 is a rear view of the ostomy appliance of Figure 1; Figure 4 is a cross sectional side view of another embodiment of an ostomy appliance according to the present disclosure; Figure 5 is an exploded perspective view of the ostomy appliance of Figure 4; Figure 6 is a cross-sectional side view of an embodiment of a kit of parts according to the present disclosure; Figure 7 is a cross-sectional side view of another embodiment of a kit of parts according to the present disclosure; Detailed description of the disclosure In the following description, the equivalent reference numerals are used in different embodiments to denote equivalent or similar features. Unless defined otherwise, all technical and scientific terms used in this specification have the same meaning as is commonly understood by the reader skilled in the art to which the claimed subject matter belongs. It is to be understood that the foregoing summary of the disclosure and the following examples are exemplary and explanatory only and are not restrictive of any subject matter claimed. The following description is directed to embodiments of the disclosure. The description of the embodiments is not meant to include all the possible embodiments of the disclosure that are claimed in the appended claims. Many modifications, improvements and equivalents which are not explicitly recited in the following embodiments may fall within the scope of the appended claims. Features described as part of one embodiment may be combined with features of one or more other embodiments unless the context clearly requires otherwise. In this specification, the use of the singular includes the plural unless the context clearly dictates otherwise. In this application, the use of “or” means “and / or” unless stated otherwise. Furthermore, use of the term “including” as well as other forms, such as “include”, “includes,” and “included,” is not limiting. As used herein, ranges and amounts can be expressed as “about” a particular value or range. About also includes the exact amount. For example, “about 5 mm” means “about 5 mm” and also “5 mm.” Generally, the term “about” includes an amount that would be expected to be within experimental error. The term “about” includes values that are within 5% less to 5% greater of the value provided. For example, “about 30mm” means “between 28.5mm and 31.5mm.” A first example embodiment of an ostomy appliance 1 according to the present disclosure is shown in Figures 1 to 3. This example is a closed appliance. As shown in Figures 1 to 3, the ostomy appliance 1 may generally comprise an inner wall 2, an outer wall 3, a separation wall 4, an inner comfort layer 5, an outer comfort layer 6 and an ostomy wafer 7. One or more of the separation wall 4, the inner comfort layer 5 and the outer comfort layer 6 may be omitted from the ostomy appliance if desired. For example, in some implementations an outer comfort layer 6 may not be required - for example when the ostomy appliance is to be used in a hospital or nursing home setting wherein easy observation of the contents of the cavity is desired. For example, in some implementations a separation wall 4 may not be required. The ostomy appliance 1 of this example is a one-piece appliance wherein the ostomy wafer 7 is permanently attached to the ostomy appliance 1, to the extent that the ostomy wafer 7 cannot easily be separated without risk of damaging the ostomy appliance 1. However, the teachings of this disclosure may also be applied, with suitable alteration where necessary, to a two-piece appliance. For example, where the ostomy appliance 1 is a two-piece appliance the inner wall 2, the outer wall 3, the separation wall 4, the inner comfort layer 5 and the outer comfort layer 6 may together form a pouch appliance that in use may be coupled to a body fitment component that comprises the ostomy wafer 7. The inner wall 2 and the outer wall 3 define a cavity for containing a stomal output. The inner wall 2 and the outer wall 3 may be joined together to define the cavity. The inner wall 2 and the outer wall 3 may be formed of flexible sheet material. The flexible sheet material of the inner wall 2 and the outer wall 3 may be formed of polyurethane, polyethylene (PE), polyvinylidene chloride (PVDC) and / or ethylene-vinyl acetate (EVA). The flexible sheet material may have a thickness of 50 to 150 micrometres, preferably 75 to 100 micrometres. As seen in Figure 1, the ostomy appliance 1 has an upper section 10, a lower section 11 and a waisted section 12 that is located between the upper section 10 and the lower section 11. The inner wall 2 may be provided with an inlet in the form of an aperture that is cut out of the inner wall 2. The inlet may be located within the upper section 10 of the ostomy appliance 1 in register with the ostomy wafer 7 that is joined thereto and that comprises a stomal inlet 20 or “starter hole” (of approximately 20mm diameter in this embodiment). The inner wall 2 and outer wall 3 may be joined together around their peripheral edges by use of welding, adhesive or equivalent means. The inner wall 2 and the outer wall 3 may be joined together by a single continuous edge seal 8. Welding is a preferred method of joining the inner wall 2 and the outer wall 3. The single continuous edge seal 8 may extend around a full perimeter of the inner wall 2 and the outer wall 3 to create a fluid-tight seal there between. Thus, the single continuous edge seal 8 may form a closed peripheral seal which may be a closed loop. As shown in Figure 3, the inner comfort layer 5 may overlie the inner wall 2 and the outer comfort layer 6 may overlie the outer wall 3. The inner comfort layer 5 and the outer comfort layer 6 may be formed of a flexible sheet material. The flexible sheet material may comprise a fabric layer. The fabric layer may be a textile layer. The textile layer may be a woven or a non-woven textile layer. Examples of suitable materials include one or more of polyester, nylon, viscose, polyethylene and polypropylene. The inner comfort layer 5 and the outer comfort layer 6 may comprise at least one fabric layer and at least one film layer. The at least one fabric layer may comprise a non-woven textile layer but is preferably a woven textile layer. The woven textile layer may comprise one or more of polyester, nylon, viscose, polyethylene and polypropylene. The film layer may comprise one or more of polyurethane, polyethylene (PE), polyvinylidene chloride (PVDC) and ethylene-vinyl acetate (EVA).The at least one film layer may be laminated to the at least one fabric layer, and optionally may be laminated to the at least one fabric layer over an entire area of the inner comfort layer 5 and the outer comfort layer 6. The inner comfort layer 5 may overlie the inner wall 2. The inner comfort layer 5 may cover only a portion of the inner wall 2. However, it is preferred that the inner comfort layer 5 covers all of the inner wall 2 (except for the ostomy wafer 7). The inner wall 2 and the inner comfort layer 5 may be joined together around their peripheral edges by use of welding, adhesive or equivalent means. A peripheral weld may extend around the perimeter of the inner wall 2 and the inner comfort layer 5. The peripheral weld that joins the inner wall 2 with the inner comfort layer 5 may be the whole or a portion of the peripheral weld that joins the inner wall 2 and the outer wall 3. The outer comfort layer 6 may overlie at least a portion of the outer wall 3. The outer wall 3 and the outer comfort layer 6 may be joined together around their peripheral edges by use of welding, adhesive or equivalent means. A peripheral weld may extend around the perimeter of the outer wall 3 and the outer comfort layer 6. The peripheral weld that joins the outer wall 3 with the outer comfort layer 6 may be the whole or a portion of the peripheral weld 8 that joins the inner wall 2 and the outer wall 3. In some embodiments, the peripheral weld 8 may be one weld that joins together the inner comfort layer 5, the inner wall 2, the outer wall 3 and the outer comfort layer 6 (and the separation wall 4 if present). The outer comfort layer 6 may comprise multiple parts. The external shape and dimensions of the multiple parts when taken together may be the same as that of the outer wall 3. For example, the outer comfort layer 6 may comprise an upper part 6a and a lower part 6b which may be joined to the outer wall 3 so that the upper part 6a partially overlaps the lower part 6b in an overlap region 115 as shown in Figure 3. The upper part 6a and the lower part 6b may be separable from each other in the overlap region 115 to form a window opening for viewing the cavity. The overlap region 115 may extend horizontally when the ostomy appliance 1 is in use. The ostomy wafer 7 may be located in register with the inlet of the inner wall 2. The ostomy wafer 7 may extend through the wafer aperture of the inner comfort layer 5. The ostomy wafer 7 may comprise an adhesive and a release liner 31. The ostomy wafer 7 may be mounted to the inner wall 2 by a suitable means, for example, by use of adhesive. The ostomy wafer 7 may have a generally circular shape. Alternatively the ostomy wafer 7 may have a general oval or diamond shape, wherein a width, side-to-side, of the ostomy wafer is greater than the height, top-to-bottom. The ostomy appliance 1 may be provided with a gas vent for venting of stomal gases from the cavity. The ostomy appliance 1 may comprise a gas vent filter 24, which may be an odour filter, for example a charcoal or activated carbon filter, for reducing the release of unwanted odours from the cavity. As can be understood from Figures 2 and 3, the gas vent filter 24 may form a part of the gas vent, which may comprise at least one gas vent aperture 27 located in the outer wall 3. The gas vent filter 24 may be covered by a filter cap and the gas vent filter 24 and / or filter cap may be located on the outer wall 3 over the at least one gas vent aperture 27. The at least one gas vent aperture 27 may permit the passage of gas from the cavity towards an exterior of the ostomy appliance through the gas vent filter 24 and filter cap (if present). The gas vent may be located, in use, in the upper half or more preferably upper quarter of the ostomy appliance 1. In particular, the centre of the at least one gas vent aperture 27 may be located, in use, above the centre of the stomal inlet 20. The term “above” is intended to mean that the at least one gas vent aperture 27 is located in use uppermost of the stomal inlet 20 along a line parallel to the inner and outer walls 2, 3 when in a flat configuration. As shown in Figure 3, the separation wall 4 may be located between the inner wall 2 and the outer wall 3. The separation wall 4 may comprise a separation filter 100 for filtering stomal gases and / or stomal liquids from stomal solids contained in the stomal output. The separation filter 100 may thus prevent stomal solids from contacting the gas vent and clogging or otherwise impairing the functionality of the gas vent filter 24. The cavity of the ostomy appliance 1 may be sub-divided into two volumes by the separation wall 4 to form first and second chambers 101, 102 as best illustrated in Figure 2. The first chamber 101 may extend between the separation wall 4 and the inner wall 2 and the second chamber 102 may extend between the separation wall 4 and the outer wall 3. The first and second chambers 101, 102 may have substantially the same volume or they may have different volumes. The first chamber 102 may have a larger volume than the second chamber 101. The separation wall 4 may be joined to the inner wall 2 and outer wall 3 at or adjacent to a part or the whole of their peripheral edges, preferably by use of welding, adhesive or equivalent means. Welding is a preferred method of joining and the peripheral weld that joins the inner wall 2, outer wall 3 and separation wall 4 may be the whole or a portion of the peripheral weld 8 that joins the inner wall 2 and the outer wall 3. As shown in Figures 1 and 2, the peripheral weld 8 may extend around a full perimeter of the inner wall 2, outer wall 3 and separation wall 4 to create a fluid-tight seal there between. Therefore, the joining of the separation wall 4 with the inner and outer walls 2, 3 may be such that the first and second chambers 101, 102 are sealed from one another other than via the separation filter 100. The separation wall 4 may comprise a flexible sheet material, which may be formed of polyurethane, polyethylene (PE), polyvinylidene chloride (PVDC) and / or ethylene-vinyl acetate (EVA). The flexible sheet material of the separation wall 4 may have a thickness of 50 to 150 micrometres, preferably 75 to 100 micrometres. The separation wall 4 may comprise a hydrophobic and / or oleophobic coating applied to the flexible sheet material and / or the flexible sheet material may be hydrophobic and / or oleophobic. Arranged within the cavity is a container 9 containing lubricant for lubricating the cavity. The container of this embodiment is burstable and the lubricant is a lubricating deodorant of the type available from ConvaTec Limited of Deeside under the Esenta (RTM) brand. In this particular embodiment, the container is a bubble of bubble wrap, which is glued in place to the inner wall 2, and visible through the window formed by separation of the two parts of the comfort layer 6. The container 9 may be arranged in use in the lower half and preferably the lower third of the ostomy appliance, for example, in the illustrated embodiment it is arranged centrally and approximately a quarter of the height of the ostomy appliance. Optionally, indicia, not shown, are provided on one or each of the comfort layers 5, 6 to indicate to a user where pressure should be applied to burst the container 9. In one example of this embodiment the bubble has a diameter of 10mm and a height of 4mm and contains 0.25ml of lubricant. In another example of this embodiment, the bubble has a diameter of 25mm and a height of 9mm and contains 4ml of lubricant. In yet another example of this embodiment, the bubble has a diameter of 30mm and a height of 12mm and contains 7.5ml of lubricant. In another non-illustrated embodiment, the bubble is attached by other means, such as welding, to the inner wall 2. In yet other non-illustrated embodiments, the bubble is attached instead to the outer wall 3. Being a bubble of bubble wrap, the burstable container 9 is generally a button-shaped cylinder, with a flat bottom, and a domed top. In other embodiments, not illustrated, the bubble is formed integrally with the inner wall 2 or outer wall 3. In this case, the flat bottom of the bubble is formed by the inner wall or outer wall, whilst the cylindrical sidewall and domed top are formed by another piece of film having a recess which defines a chamber containing the lubricant when the film material is welded to the wall 2, 3. In one embodiment, a bubble wrap may be selected that bursts when subjected to a force of 30N, such a container is configured to resist bursting when squeezed (through the walls of the appliance) at a lower pressure and configured to burst when squeezed with a force of 30N or more. In another embodiment, a bubble wrap may be selected that bursts when subjected to a force of 40N, such a container is configured to resist bursting when squeezed (through the walls of the appliance) at a lower pressure and configured to burst when squeezed with a force of 40N or more. Both of these options should be easily burst by ostomates or other users, even if they have low manual dexterity, because if they find it too difficult to pinch, they can use a grip to squeeze, rather than a pinch, And obviously those skilled in the art will have no difficulty in selecting alternative bursting forces. In yet another non-illustrated embodiment, instead of a bubble, the container 9 is a watersoluble burstable container as described in WO2004 / 005156 A1, but with one or more discrete chambers for containing the lubricating deodorant as described. In yet another non-illustrated embodiment, the container 9 is a snap-to-burst dispensing package of the type described in more detail in US2010065582A1, containing lubricating deodorant In further non-illustrated embodiments, the containers contain both lubricant and a gas (e.g. nitrogen or air), so that the bursting is a more explosive “pop”, than just with a lubricant. The pouch of the ostomy appliance 1 is formed in a conventional manner, as will be well known by those skilled in the art (or could even be purchased, readily). To manufacture the burstable container 9, a single bubble is isolated from a sheet of bubble wrap (taking care not to inadvertently cut, puncture or burst the bubble; some or all the air is withdrawn from the bubble using an empty syringe / needle and a syringe is used to inject an appropriate quantity of lubricant formulation into the bubble (for example 2.5ml for a small bubble, 4ml for a large bubble, or 7.5ml for an extra large bubble. The bubble can optionally be closed, e.g. by dabbing glue on over the hole formed by the syringe, to prevent inadvertent leakage. In use, a user locates the container 9 in the ostomy appliance 1, via the indica (not shown), by looking through the window, or by feel, and squeezes the container 9 until the bubble bursts. The lubricant can then flow (e.g. by capillary action) through the cavity to coat the inside surfaces of the inner wall 2 and outer wall 3 with lubricant. The user can then apply the ostomy appliance over their stoma in the usual way and the lubricant will act to improve flow of stomal output in the cavity, reducing the likelihood of pancaking. A second embodiment of an ostomy appliance 1 according to the present disclosure is shown in Figures 4 and 5. Like reference numerals have been used for like features. Only those features that differ in this embodiment compared to the previous embodiment will be described in detail in the following description. For features that are common to one or more embodiments, reference should be made to the description as a whole. The ostomy appliance 1 of this embodiment is an open appliance. Compared to the first example embodiment, the lower section 11 is shaped differently so as to accommodate a drain. The lower section 11 may comprise a drain aperture 40. The drain aperture 40 may be an unsealed portion of the perimeter of the ostomy appliance 1, e.g. a region of the perimeter of the inner wall 2 and outer wall 3 which are not sealed to each other. A drain portion 41 may define an elongate drain passage that extends from the cavity of the ostomy appliance 1 to the drain aperture 40 located at a lower end of the drain portion 41 as shown in Figure 7. The drain portion 41 may be integral with a remainder of the lower section of the ostomy appliance. In particular, the inner wall 2 and the outer wall 3 may each be a single piece of material that includes the upper section 10, the waisted section 12 and lower section 11 (including the drain portion 41) as most clearly shown in the exploded view of Figure 5. As in the above example embodiments, an inner comfort layer 5 and an outer comfort layer 6 may be provided. However, as most clearly shown in Figure 5, the inner comfort layer 5 and outer comfort layer 6 may not cover the drain portion 41 of the inner wall 2 and the outer wall 3. Communication between the cavity and the elongate drain passage may be via a drain inlet 200 that may be defined as the point of transition between the cavity and the drain portion 41. The drain inlet 200 may function to allow passage of stomal output from the cavity into the drain portion 41 when the drain portion 41 is in an extended configuration, e.g. an unrolled configuration as shown. The drain aperture 40 may to allow outflow of the stomal output from the drain portion 41 when the drain portion 41 is in the extended configuration. The drain portion 41 may be moved between an extended configuration, in which the drain aperture 40 is open, and a rolled-up configuration, in which the drain aperture 40 is closed off to hinder or prevent outflow of the stomal output. For example, the drain portion 41 may be configured to be folded or otherwise turned up on itself (e.g. rolled up) to close off the drain aperture 40. The ostomy appliance 1 may be provided, by way of example, with features to assist in the folding or rolling-up of the drain portion 41 as will be described below. In some embodiments, the drain portion 41 may be folded into a plurality of segments having approximately equal segment lengths and separated by folds. The drain portion 41 may therefore be successively folded one or more times such that the segments overlie each other. The drain portion 41 may be configured to be folded to form a plurality of folds across the width of the drain portion 41 to inhibit and preferably prevent passage of stomal output out of the drain aperture 40. For example, the segments and fold lines may have appropriate lengths and locations respectively such that the drain portion 41 can be folded or rolled repeatedly in the same sense, folding forwards and upwards towards an upper end of the drain portion 41 with each fold. The folds may be generally perpendicular to an elongate axis of the drain portion 41 and extend across the whole width of the drain portion 41 to close off the drain passage at each fold location. In some embodiments, one or more pursing strips 209, 210 may be provided on the drain portion 41. The pursing strips 209, 210 may function to both provide localised rigidity to the drain portion 41 and also to define the locations and orientations of the segments and folds of the drain portion 41. The pursing strips 209, 210 may comprise strips of material attached drain portion 41. The pursing strips 209, 210 may be formed from a material, preferably a flexible material, having a higher rigidity than the material of the drain portion 41 and having some resilience such that once attached to the drain portion 41 the pursing strips 209, 210 can each be squeezed laterally to arch the pursing strip (and therefore the attached material of the drain portion 41) and thereby open the elongate drain passage. The pursing strips 209, 210 may be formed from polystyrene. A first pursing strip 209 may be attached to the inner wall 2 of the drain portion 41 and may be attached at a distal end of the inner wall 2 at or adjacent the drain aperture 40. A second pursing strip 210 may be attached to the outer wall 3 of the drain portion 41. As shown in Figure 9, a longitudinal gap may be provided between an upper edge of the first pursing strip 209 and a lower edge of the second pursing strip 210. The longitudinal gap may define the location of a first fold of the drain portion 41. Each of the pursing strips 209, 210 may extend the same distance along a length of the drain portion 41. A first fastening element 215a may be arranged on the inner wall 2. A second fastening element 215b may be arranged on, or depend from, the outer wall 3. The first closure element 215a and the second closure element 215b may comprise any suitable fastener elements, for example hook-and-loop type fastener elements. The first fastening element 215a may be located on the drain portion 41 upwards of the location of the second pursing strip 210 as shown in Figure 9. A longitudinal gap may be provided between an upper edge of the second pursing strip 210 and a lower edge of the first fastening element 215a. The longitudinal gap may define the location of a second fold of the drain portion 41. The second fastening element 215b may be provided on a flap 203 that is itself mounted or affixed to the outer wall 3. The flap 203 may comprise a first flange 203a and a second flange 203b. The second flange 203b may extend from the first flange 203a, the first flange 203a and the second flange 203b may be one integral piece and may meet at a fold line such that the second flange 203b is rotatable about the fold line. The first flange 203a may be attached to the outer wall 3 while the second flange 203b hangs free of the outer wall 3. The attachment of the first flange 203a may be formed using an adhesive or by welding. The second fastening element 215b may be located on the second flange 203b. The flap 203 may be formed from a flexible sheet material. The flexible sheet material may be more rigid than the flexible sheet material of the inner wall 2 and outer wall 3. The flap 203 may be located on the drain portion 41 upwards of the location of the first fastening element 215a as shown in Figure 9. A longitudinal gap may be provided between an upper edge of the first fastening element 215a and a lower edge of the flap 203. The longitudinal gap may define the location of a third fold of the drain portion 41. Rolling-up of the drain portion 41 may be carried out as follows. First, the user or ostomate may fold the distal end of the drain portion 41 outwards and upwards about the first fold line to locate the first pursing strip 209 over the second pursing strip 210. Secondly, the drain portion 41 and the pursing strips 209, 210 may be folded again, in the same sense -outwards and upwards, about the second fold line and then the third fold line such that the folded and stacked first pursing strip 209, second pursing strip 210 and first fastening element 215a are located to overlie the first flange 203a of the flap 203 with the first fastening element 215a being exposed. Finally the second flange 203b of the flap 203 can be folded down to secure together the first fastening element 215a and the second fastening element 215b. The drain portion 41 can be unrolled by reversing the above procedure. Optionally, the ostomy appliance 1 may be provided with a pocket 6c, as shown in Figure 10. The pocket 6c may be formed from the same type of material as the outer comfort layer 6. The pocket 6c may be shaped and sized to cover a lower portion of the lower part 6b of the outer comfort layer 6. The lateral edges and lower edge of the pocket 6c may be joined to the outer comfort layer 6, for example by welding. The upper edge of the pocket 6c is left unsealed to form an upper mouth of the pocket 6c. When the drain portion 41 is in the rolled-up configuration the length of the ostomy appliance 1 may be reduced by folding the lower section 11 outwards and upwards and tucking the distal end of the ostomy appliance 1 into the upper mouth of the pocket 6c. This may be particularly appropriate when the ostomy appliance 1 is empty or only contains a small volume of stomal output. As the cavity is filled the ostomate may untuck the lower section 11 from the pocket 6c. It will be appreciated that the configuration of the drain portion 41 of this example is provided merely as one example of a drain. Other configurations of drain may be used for an open appliance according to the present disclosure. Another distinction between the ostomy appliance of the second embodiment and that of the first embodiment is that no separation wall is provided in the second embodiment. A further, important, difference is that whereas the first embodiment comprises just one burstable container 9 filled with lubricant, the ostomy appliance of the second embodiment includes an assembly 13 which is made up of an array of burstable containers 9. In this embodiment, the array is an array of six bubbles of bubble wrap, each filled with lubricant in exactly the same manner as the first embodiment. Of course, those skilled in the art will appreciate that by including an array of containers, a first container can be burst prior to attaching the appliance (to lubricate the cavity initially), then, after draining (which will be more effective on account of the lubricant), another container can be burst, re-lubricating the cavity of the ostomy appliance 1, without the need to remove it. Obviously this process of draining, then re-lubricating can be carried out as many times as the array of containers allows, i.e. with 6 burstable containers, after initial lubrication, the cavity can be re-lubricated five further times. Naturally, in other embodiments, different numbers of burstable containers can be arranged in the array. Moreover, multiple separate burstable containers 9 could be provided in the cavity, although that would be less convenient than an array. In a third embodiment, shown in figure 6, there is provided a kit of parts comprising an ostomy appliance 1 according to the first embodiment, but with a separate burstable container 9 of lubricant (which other than not being attached in the cavity is otherwise identical to that of the first embodiment). The burstable container 9 of lubricant is configured to be smaller than the stomal inlet 20, in order that a user can introduce the container into the cavity through the stomal inlet, then burst it within, prior to use. A fourth embodiment is shown in figure 6, here a kit of parts is made up of the drainable ostomy appliance 1 according to the second embodiment, but with a separate array 13 of burstable containers 9 of lubricant (which other than not being attached in the cavity is otherwise identical to that of the first embodiment). The array 13 of burstable containers 9 of lubricant is configured to be smaller than the drain aperture 40, in order that a user can introduce the array into the cavity through the drain aperture, then burst the containers within, as discussed above. It is to be understood that at least some of the figures and descriptions of the disclosure have been simplified to focus on elements that are relevant for a clear understanding of the disclosure, while eliminating, for purposes of clarity, other elements that the reader skilled in the art will appreciate may also be required. Because such elements are well known to the reader skilled in the art, and because they do not necessarily facilitate a better understanding of the disclosure, a description of such elements is not provided herein.

Claims

1. An ostomy appliance comprising an inner wall and an outer wall that define a cavity for containing a stomal output; wherein the cavity comprises a burstable container, the burstable container containing a lubricant.

2. An ostomy appliance according to claim 1 wherein the lubricant is a lubricating deodorant.

3. An ostomy appliance according to claim 1 or 2 wherein the container is configured to burst when squeezed through the walls of the ostomy appliance.

4. An ostomy appliance according to claim 3 which is provided with indicia overlying the location of the container to indicate where to squeeze.

5. An ostomy appliance according to claim 3 or 4 wherein at least one wall is transparent such that the container can be seen through the transparent wall.

6. An ostomy appliance according to any preceding claim wherein the container is configured to resist bursting when squeezed at a force of 20N or less.

7. An ostomy appliance according to any of claims 1 to 5 wherein the container is configured to resist bursting when squeezed at a force of 40N or less.

8. An ostomy appliance according to any of claims 1 to 6 wherein the container is configured to burst when squeezed with a force of 30N or more.

9. An ostomy appliance according to any of claims 1 to 7 wherein the container is configured to burst when squeezed with a force of 50N or more.

10. An ostomy appliance according to any preceding claim wherein the container is a burstable capsule, configured to burst in response to squeezing alone.

11. An ostomy appliance according to claim 10 wherein the burstable capsule is a bubble of bubble wrap.

12. An ostomy appliance according to any preceding claim wherein the burstable container is a generally cylindrical shape with a greater base diameter than height.

13. An ostomy appliance according to any preceding claim wherein the burstable container contains between 0.2ml and 0.3ml of lubricant.

14. An ostomy appliance according to any preceding claim wherein the burstable container contains between 3ml and 4ml of lubricant.

15. An ostomy appliance according to any preceding claim wherein the container is affixed to the inner wall or the outer wall.

16. An ostomy appliance according to any of claims 1 to 14 wherein the container is formed integrally with the inner wall or the outer wall of the container.

17. An ostomy appliance according to any preceding claim which is a closed appliance, the appliance and comprises only one burstable container containing lubricant.

18. An ostomy appliance according to any of claims 1 to 16 which is an open appliance and comprises a plurality of burstable containers of lubricant.

19. An ostomy appliance according to claim 18 comprising an array of burstable containers containing lubricant.

20. An ostomy appliance according to claim 19 wherein each burstable container is a bubble of bubble wrap.

21. A burstable capsule of lubricant for lubricating a cavity of an ostomy appliance, the burstable capsule being suitable for introduction into a cavity of an ostomy appliance; wherein the capsule is a bubble of bubble wrap.

22. A burstable capsule according to claim 21 having a maximum width of no more than 20mm and a maximum depth of no more than 20mm, to allow it to be introduced through a stomal inlet of 20mm diameter.

23. An assembly of burstable capsules of lubricant for lubricating a cavity of an ostomy appliance; the assembly being suitable for introduction into a cavity of an ostomy appliance; wherein the assembly is formed by an array of bubble wrap containing 5 the lubricant.

24. An assembly according to claim 23 which has a maximum width of no more than 30mm and a maximum depth of no more than 15mm.10 25. A kit comprising an ostomy appliance and a container of lubricant for lubrication of acavity of the ostomy appliance, the container being suitable for insertion into the ostomy appliance.30

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