Patent Publication Number: US-2021177642-A1

Title: Accessory device of medical system and related methods for issue identification

Description:
The present disclosure relates to an accessory device of an ostomy system and related methods, e.g. for monitoring an ostomy appliance and/or assisting a user of the ostomy system. The ostomy system comprises an ostomy appliance, an accessory device, and a monitor device. In particular, the present disclosure relates to methods and devices for improved assisting and guiding of a user. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of embodiments and are incorporated into and a part of this specification. The drawings illustrate embodiments and together with the description serve to explain principles of embodiments. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts. 
         FIG. 1  illustrates an exemplary ostomy system, 
         FIG. 2  illustrates an exemplary monitor device of the ostomy system, 
         FIG. 3  is an exploded view of a base plate of an ostomy appliance, 
         FIG. 4  is an exploded view of an exemplary electrode assembly, 
         FIG. 5  is a proximal view of parts of a base plate, 
         FIG. 6  is a distal view of an exemplary electrode configuration, 
         FIG. 7  is a distal view of an exemplary masking element, 
         FIG. 8  is a distal view of an exemplary first adhesive layer, 
         FIG. 9  is a proximal view of the first adhesive layer of  FIG. 8 , 
         FIG. 10  is a distal view of a part of the base plate including monitor interface, 
         FIG. 11  is a distal view of the electrode configuration of  FIG. 6 , 
         FIG. 12  is a distal view of an exemplary electrode configuration, 
         FIG. 13  is a distal view of an exemplary masking element, 
         FIG. 14  is a distal view of an exemplary first adhesive layer, 
         FIG. 15  is a distal view of an exemplary electrode configuration, 
         FIG. 16  is a flow diagram of an exemplary method, 
         FIG. 17  illustrates an exemplary accessory device according to the present disclosure, and 
         FIG. 18  illustrates an exemplary user interface of an accessory device according to the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Various exemplary embodiments and details are described hereinafter, with reference to the figures when relevant. It should be noted that the figures may or may not be drawn to scale and that elements of similar structures or functions are represented by like reference numerals throughout the figures. It should also be noted that the figures are only intended to facilitate the description of the embodiments. They are not intended as an exhaustive description of the invention or as a limitation on the scope of the invention. In addition, an illustrated embodiment needs not have all the aspects or advantages shown. An aspect or an advantage described in conjunction with a particular embodiment is not necessarily limited to that embodiment and can be practiced in any other embodiments even if not so illustrated, or if not so explicitly described. 
     Throughout this disclosure, the words “stoma” and “ostomy” are used to denote a surgically created opening bypassing the intestines or urinary tract system of a person. The words are used interchangeably, and no differentiated meaning is intended. The same applies for any words or phrases derived from these, e.g. “stomal”, “ostomies” etc. Also, the solid and liquid wastes emanating from the stoma may be referred to as both stomal “output,” “waste(s),” and “fluids” interchangeably. A subject having undergone ostomy surgery may be referred to as “ostomist” or “ostomate”—moreover, also as “patient” or “user”. However, in some cases “user” may also relate or refer to a health care professional (HCP), such as a surgeon or an ostomy care nurse or others. In those cases, it will either be explicitly stated, or be implicit from the context that the “user” is not the “patient” him- or herself. 
     In the following, whenever referring to proximal side or surface of a layer, an element, a device or part of a device, the referral is to the skin-facing side or surface, when a user wears the ostomy appliance. Likewise, whenever referring to the distal side or surface of a layer, an element, a device or part of a device, the referral is to the side or surface facing away from the skin, when a user wears the ostomy appliance. In other words, the proximal side or surface is the side or surface closest to the user, when the appliance is fitted on a user and the distal side is the opposite side or surface—the side or surface furthest away from the user in use. 
     The axial direction is defined as the direction of the stoma, when a user wears the appliance. Thus, the axial direction is generally perpendicular to the skin or abdominal surface of the user. 
     The radial direction is defined as perpendicular to the axial direction. In some sentences, the words “inner” and “outer” may be used. These qualifiers should generally be perceived with respect to the radial direction, such that a reference to an “outer” element means that the element is farther away from a centre portion of the ostomy appliance than an element referenced as “inner”. In addition, “innermost” should be interpreted as the portion of a component forming a centre of the component and/or being adjacent to the centre of the component. In analogy, “outermost” should be interpreted as a portion of a component forming an outer edge or outer contour of a component and/or being adjacent to that outer edge or outer contour. 
     The use of the word “substantially” as a qualifier to certain features or effects in this disclosure is intended to simply mean that any deviations are within tolerances that would normally be expected by the skilled person in the relevant field. 
     The use of the word “generally” as a qualifier to certain features or effects in this disclosure is intended to simply mean—for a structural feature: that a majority or major portion of such feature exhibits the characteristic in question, and—for a functional feature or an effect: that a majority of outcomes involving the characteristic provide the effect, but that exceptionally outcomes do no provide the effect. 
     The present disclosure relates to an ostomy system and devices thereof, such as an ostomy appliance, a base plate for an ostomy appliance, a monitor device, and optionally one or more accessory devices. Further, methods related to an accessory device of the ostomy system and accessory devices thereof are disclosed. An accessory device (also referred to as an external device) may be a mobile phone or other handheld device. An accessory device may be a personal electronic device, e.g. a wearable, such as a watch or other wrist-worn electronic device. The ostomy system may comprise a docking station. An accessory device may be a docking station. An accessory device may act as a docking station. The docking station may be configured to electrically and/or mechanically couple the monitor device to the docking station. The docking station may be configured for charging the monitor device and/or configured for transferring data between the monitor device and the docking station, and/or between the accessory device and the docking station and/or between the monitor device and the accessory device via the docking station. The ostomy system may comprise a server device. The server device may be operated and/or controlled by the ostomy appliance manufacturer and/or a service centre. 
     The present disclosure provides an ostomy system and devices thereof, such as an ostomy appliance, a base plate for an ostomy appliance, a monitor device, and optionally one or more accessory devices which either alone or together facilitate reliable determination of the nature, severity and rapidness of moisture propagation in the adhesive material provided for attaching the base plate to the skin surface of a user. Depending on the nature of the pattern of moisture propagation in the adhesive material, the ostomy system and devices thereof enable providing information to the user about the type of failure, and in turn enable providing customized indications to the user of appropriate actions to be made for improving the use of the ostomy appliance without experiencing severe leakage and/or skin damage. 
     The present disclosure provides a method, optionally performed in an accessory device, wherein the accessory device comprises an interface configured to communicate with one or more devices of an ostomy system, the interface comprising a display, wherein the ostomy system comprises a monitor device and/or an ostomy appliance, the ostomy appliance being configured to be placed on a skin surface of a user, wherein the ostomy appliance comprises a base plate, the method comprising: obtaining monitor data from the monitor device, wherein the monitor data is optionally indicative of presence of fluid, such as urine, output, sweat and/or mucus, at a proximal side of a first adhesive layer of the base plate towards the skin surface and/or indicative of a moisture level in a first adhesive layer of the base plate; determining an issue based on the monitor data, wherein the issue is related to the ostomy appliance; identifying, based on the determined issue, a set of candidate actions to the issue from a plurality of possible actions; selecting a set of digital content based on the set of candidate actions; and displaying the set of digital content on the display. 
     Also disclosed is an accessory device, wherein the accessory device forms part of an ostomy system, the accessory device comprising a memory; a processor operatively connected to the memory; and an interface operatively connected to the processor and configured to communicate with one or more devices of the ostomy system, the one or more devices comprising a monitor device and/or an ostomy appliance configured to be placed on a skin surface of a user, the ostomy appliance comprising a base plate, wherein the interface is configured to obtain monitor data from the one or more devices, and wherein the interface comprises a display, wherein the processor is configured to determine an issue based on the monitor data, wherein the issue is related to the ostomy appliance; identify a set of candidate actions from a plurality of possible actions based on the determined issue; select a set of digital content based on the set of candidate actions; and wherein the interface is configured to display the set of digital content on the display. 
     It is an advantage of the present disclosure that an optimum or improved use of an ostomy appliance is provided for. In particular, the present disclosure facilitates that a user is able to improve handling of the ostomy appliance before or during use in turn providing an improved (extended) wear time of the base plate/ostomy appliance and/or a reduced risk of skin damage to the user. 
     The present disclosure provides an efficient, and easy-to-use ostomy system with a high degree of comfort for a user. 
     Further, the present disclosure is useful in aiding to reduce the risk of a user experiencing leakage from an ostomy appliance and/or improving use (less skin irritation and/or increased wear time) of an ostomy appliance by providing a customized training tool with guidance to an improved preparation and/or use of the ostomy appliance. Further, the present disclosure is further useful in helping reduce the risk of skin damage to a user by providing customized and personalized guidance based on monitor data originating from the user. 
     The ostomy appliance comprises a base plate and an ostomy pouch (also referred to as an ostomy bag). The ostomy appliance may be a colostomy appliance, an ileostomy appliance or a urostomy appliance. The ostomy appliance may be a two-part ostomy appliance, i.e. the base plate and the ostomy pouch may be releasably coupled e.g. with a mechanical and/or an adhesive coupling, e.g. to allow that a plurality of ostomy pouches can be utilized (exchanged) with one base plate. Further, a two-part ostomy appliance may facilitate correct application of the base plate to skin, e.g. to an improved user sight of the stomal region. The ostomy appliance may be a one-part ostomy appliance, i.e. the base plate and the ostomy pouch may be fixedly attached to each other. The base plate is configured for coupling to a user&#39;s stoma and/or skin surrounding the stoma, such as a peristomal skin area. The base plate may be planar or curved, such as concave or convex. 
     The ostomy appliance includes a base plate, such as a monolithic, one-piece base plate, e.g. integrated with a sensor assembly part, or a base plate and a separate sensor assembly part, such as a sensor assembly part to be subsequently applied to a base plate. For example, to allow an arbitrary base plate, such as a conventional base plate, to achieve the features as described herein. Features as described with respect to the base plate herein may be provided by a sensor assembly part to be applied to a base plate, e.g. by the user. A sensor assembly part may be adapted to adhere to an ostomy plate. 
     A disclosed method of attaching a base plate to a user&#39;s stoma and/or skin surrounding the stoma, such as the peristomal skin area, may comprise attaching a sensor assembly part to a base plate and attaching the base plate, e.g. together with the attached sensor assembly part, to the user&#39;s stoma and/or skin surrounding the stoma, such as the peristomal skin area. Alternatively, the method of attaching the base plate to the user&#39;s stoma and/or skin surrounding the stoma may comprise attaching the sensor assembly part to the user&#39;s stoma and/or skin surrounding the stoma and attaching the base plate to the user&#39;s stoma and/or skin surrounding the stoma above the attached sensor assembly part. 
     A base plate and/or a sensor assembly part for an ostomy appliance is disclosed, the base plate and/or the sensor assembly part comprising a first adhesive layer with a proximal side configured for attachment of the base plate and/or the sensor assembly part to the skin surface of a user, the first adhesive layer having a stomal opening with a centre point; and a plurality of electrodes including a first leakage electrode, a second leakage electrode, and optionally a third leakage electrode, wherein the plurality of electrodes is configured to detect presence of fluid on the proximal side of the first adhesive layer in a primary sensing zone and/or a secondary sensing zone. The primary sensing zone is arranged in a primary angle space from the centre point of the first adhesive layer and the secondary sensing zone is arranged in a secondary angle space from the centre point of the first adhesive layer. 
     Further, a monitor device for an ostomy system is disclosed, the ostomy system comprising an ostomy appliance with a base plate having a first adhesive layer with a proximal side configured for attachment of the base plate and/or the sensor assembly part to the skin surface of a user, the first adhesive layer having a stomal opening with a centre point, the monitor device comprising a processor; memory; a first interface connected to the processor and the memory, the first interface configured for obtaining ostomy data from the base plate and/or the sensor assembly part coupled to the first interface; and a second interface connected to the processor and configured for transmitting monitor data to one or more accessory devices. The monitor data may be indicative of presence of fluid in the primary sensing zone, e.g. on the proximal side of the base plate and/or the sensor assembly part. The monitor data may be indicative of presence of fluid in the secondary sensing zone, e.g. on the proximal side of the base plate and/or the sensor assembly part. The monitor data may be indicative of presence of fluid in a tertiary sensing zone, e.g. on the proximal side of the base plate and/or the sensor assembly part. The memory of the monitor device may be configured for storing ostomy data. In one or more exemplary methods, the monitor data comprises ostomy data and/or parameter data. For example, the parameter data is derived based on ostomy data. Ostomy data and/or parameter data based on the ostomy data are obtained from electrodes/sensors of the ostomy appliance with e.g. a monitor device or an accessory device. The monitor device may be configured to process the ostomy data and/or parameter data based on the ostomy data to determine monitor data that are transmitted to the accessory device. The monitor data may be indicative of or comprise a moisture pattern type. The monitor data may be indicative of or comprise a wear time of the baseplate. The monitor device may be electrically coupled to the plurality of electrodes of the base plate and/or the sensor assembly part. For example, the monitor device may be couplable, such as releasably couplable, to the plurality of electrodes of the base plate and/or the sensor assembly part. The monitor device may be configured to measure one or more resistances between the plurality of electrodes and detect the leakage of output based on the measured one or more resistances. 
     Also disclosed is an ostomy system comprising an ostomy appliance and a monitor device as described herein. 
     The method comprises obtaining monitor data from the monitor device. The monitor data may be indicative of presence of fluid at a proximal side of a first adhesive layer of the base plate and/or the sensor assembly part towards the skin surface and/or indicative of a moisture level or moisture pattern in a first adhesive layer of the base plate and/or the sensor assembly part. In other words, the monitor data may be indicative of presence of fluid between the base plate and/or the sensor assembly part and the skin surface of the user. The monitor data may comprise ostomy data and/or parameter data. In one or more exemplary methods, obtaining monitor data comprises obtaining data representative of the measurements of the electrical properties at the proximal side of, within and/or at the distal side of the first adhesive layer. In one or more exemplary methods, the ostomy data and/or parameter data are indicative of resistance between any two of a plurality of electrodes, capacitance and/or inductance between any two of a plurality of electrodes and/or any change thereof. In one or more exemplary methods, the ostomy data and/or parameter data are indicative of a change in resistance, capacitance and/or inductance between electrodes. In one or more exemplary methods, the ostomy data and/or parameter data comprises timing information, such as timestamped data or information from which timing is derivable. 
     The method comprises determining an issue based on the monitor data, wherein the issue is related to the ostomy appliance. Determining an issue based on the monitor data may comprise determining one or more, such as a plurality of issues, based on the monitor data. An exemplary issue may be irregularities in the skin surface. An exemplary issue may be inappropriate application, such as insufficient pressure at application and/or inappropriate positioning, of the ostomy appliance. An exemplary issue may be use of a sub-optimal or inappropriate ostomy appliance type (concave, convex, one-part, two-part). An exemplary issue may be inappropriate preparation, such as cleaning and/or drying, of the skin surface. An exemplary issue may be inappropriate preparation of the base plate and/or the sensor assembly part, e.g. resulting from inappropriate or wrong cutting of base plate and/or the sensor assembly part. An exemplary issue may be a deviation from the standard/appropriate use, such as wear time, of the ostomy appliance. An exemplary issue may be change in intake, such as diet and/or medicine. An exemplary issue may be change in medicine. An exemplary issue may be change in physical activity. In the present context an issue may result (or is likely to result) in premature leakage between the base plate and/or the sensor assembly part and the skin of the user. 
     Determining an issue may comprise selecting an issue from a set of candidate issues based on the monitor data. Determining an issue may comprise to obtain an issue, e.g. from a server device. Accordingly, the method may comprise transmitting the monitor data (or parts thereof) to a server device and receiving an issue (or one or more issue parameters) from the server device. 
     In one or more exemplary methods, determining the issue based on the monitor data comprises determining one or more moisture pattern types, e.g. from a set of candidate moisture pattern types, based on the monitor data. A moisture pattern type is indicative of the distribution of fluid on the proximal side of the base plate and/or the sensor assembly part/first adhesive layer. A moisture pattern type may be indicative of the distribution of fluid in the first adhesive layer. An exemplary issue may be change in moisture pattern type compared to previous moisture pattern types. The set of candidate moisture pattern types may comprise a plurality of moisture pattern types, such as at least three different moisture pattern types. Determining an issue may comprise obtaining, e.g. determining and/or retrieving, a default moisture pattern type, comparing the current moisture pattern type with the default moisture pattern type, and optionally setting the issue to change in moisture pattern types if the difference between the current moisture pattern type and the default moisture pattern type satisfies a pattern change criterion. The default moisture pattern type may be based on monitor data for previous base plate and/or sensor assembly part wear cycles of the user. An exemplary issue may be change in wear time of the base plate and/or the sensor assembly part compared to previous wear times for previous base plate and/or sensor assembly part wear cycles. Determining an issue may comprise obtaining, e.g. determining and/or retrieving, a default wear time of base plates and/or sensor assembly parts, comparing the current wear time of the base plate and/or the sensor assembly part with the default wear time, and optionally setting the issue to change in wear time if the difference between the current wear time and the default wear time satisfies a wear time change criterion, e.g. if the difference between current wear time and the default wear time is larger than a wear time change threshold. Determining the issue based on the monitor data may be based on the moisture pattern type and the wear time of the base plate and/or the sensor assembly part. The method may comprise displaying an issue user interface element on the display, wherein the issue user interface element corresponds to or is indicative of the issue. 
     In the method, determining an issue based on the monitor data may comprise determining one or more wear time parameters, e.g. wear time, average wear time, and/or expected wear time, based on the monitor data, and wherein the issue is based on wear time parameter(s) of the one or more wear time parameters. 
     In the method, determining an issue may comprise selecting an issue from a look-up-table in a memory of the accessory device. The look-up table may map one or more moisture pattern types and/or one or more wear time parameters (e.g. wear time, average wear time, expected wear time) to an issue. 
     An exemplary moisture pattern type is a (first) directional moisture pattern type (directional leakage), i.e. a leakage primarily occurs or only occurs (is detected) in one (primary) sensing zone (in primary moisture pattern direction) out of a plurality of sensing zones. An exemplary moisture pattern type is a (second) directional moisture pattern type (directional leakage), i.e. a leakage primarily occurs or only occurs (is detected) in one (secondary) sensing zone (in secondary moisture pattern direction) out of a plurality of sensing zones. An exemplary moisture pattern type is a (third) directional moisture pattern type (directional leakage), i.e. a leakage primarily occurs or only occurs (is detected) in one (tertiary) sensing zone (in tertiary moisture pattern direction) out of a plurality of sensing zones. An exemplary moisture pattern type is a (fourth) directional moisture pattern type (directional leakage), i.e. a leakage primarily occurs or only occurs (is detected) in a subset of, e.g. two, sensing zones out of a plurality of sensing zones. An exemplary moisture pattern type is an omni-directional moisture pattern (omni-directional leakage), i.e. a leakage is distributed circumferentially around the stomal opening, i.e. a leakage occurs in all sensing zones of the base plate and/or the sensor assembly part. In one or more exemplary methods, determining one or more moisture pattern types based on the monitor data comprises identifying a moisture pattern type based on parameter data (of the monitor data). A moisture pattern type may comprise a moisture pattern direction, e.g. a main direction extending from the stomal opening. 
     Determining the issue based on the monitor data may comprise determining a leakage state of the ostomy appliance based on the monitor data. 
     In one or more exemplary methods, determining the issue based on the monitor data comprises generating a set of representative features of the moisture pattern type based on previously determined moisture pattern types (for previous base plates and/or sensor assembly parts); determining whether one or more features of the determined moisture pattern type satisfy a first issue criterion, wherein the first issue criterion is based on the set of representative features; and determining the issue as a first issue in accordance with the one or more features of the determined moisture pattern type satisfying the first issue criterion. 
     In one or more exemplary methods, determining the issue based on the monitor data comprises determining a number of occurrences of the determined moisture pattern type over a time period, such as at least 10 days or at least 10 base plate and/or sensor assembly part wear cycles; determining whether the number of occurrences satisfies a second issue criterion; and determining the issue as a second issue in accordance with the number of occurrences satisfying the second issue criterion. 
     The method comprises identifying, based on the determined issue, a set of candidate actions to the issue from a plurality of possible actions. The plurality of possible actions may comprise an action regarding one or more of: skin preparation, base plate and/or sensor assembly part preparation, base plate and/or sensor assembly part placement, base plate and/or sensor assembly part application, ostomy appliance type, base plate and/or sensor assembly part type, and user guidance. Identifying, based on the determined issue, a set of candidate actions to the issue from a plurality of possible actions may comprise mapping the issue to a set of candidate actions, e.g. with a look-up table in memory of the accessory device. A set of candidate actions to the issue may comprise one or more, such as a plurality of, candidate actions. Identifying, based on the determined issue, a set of candidate actions to the issue from a plurality of possible actions may comprise obtaining the set of candidate actions, e.g. from a server device. Accordingly, the method may comprise transmitting the issue to a server device and/or receiving the set of candidate actions from the server device. 
     A set of candidate actions to one issue, e.g. a first issue, may be different from a set of candidate actions to another issue, such as a second issue. For example, a set of candidate actions to one issue, e.g. a first issue, may have a larger number of candidate actions than a set of candidate actions to another issue, such as a second issue. 
     An exemplary candidate action may be a remedy. An exemplary candidate action may be change of ostomy appliance type. An exemplary candidate action may be to improve application procedure, e.g. application of optimum pressure on base plate or base plate with sensor assembly part and/or position of base plate or base plate with sensor assembly part, avoid mucus on proximal side of base plate and/or sensor assembly part, for the base plate and/or sensor assembly part. An exemplary candidate action may be to suggest use of one or more accessories, such as a sealing paste, sealing tape and/or sealing ring. An exemplary candidate action may be to improve preparation, such as cleaning and drying, of the skin surface. An exemplary candidate action may be to improve preparation, such as cutting, of the base plate and/or the sensor assembly part. The method may comprise displaying a number of candidate action user interface elements on the display, each candidate action user interface element corresponding to a candidate action of the set of candidate actions. An exemplary candidate action may be to contact nurse or professional care taker. An exemplary candidate action may be to evaluate/change intake, such as diet and/or medicine. An exemplary candidate action may be to evaluate/change physical activity, such as way of moving, movement pattern and/or physical techniques to improve wear time. An exemplary candidate action may be to evaluate/change user habits. An exemplary candidate action may be to evaluate/change clothing style, such as belt position and/or low waist/high waist clothing. 
     In one or more exemplary methods, identifying the set of candidate actions from a plurality of possible actions based on the determined issue comprises identifying the set of candidate actions from a plurality of possible actions based on the determined issue and on user data. The user data optionally comprises one or more of ostomate type, skin irregularity parameter, stoma position parameter, health data, nutritional data, medicine intake data, activity data, gender data, and age data. The skin irregularity parameter may be indicative of presence and/or position of scar. The skin irregularity parameter may be indicative of size and/or shape of scar. The stoma position parameter is indicative of the position of the stoma, e.g. above or below belly, distance to belly, and/or which side of the body (left/right). 
     The method comprises selecting, e.g. in response to a user selecting a corresponding candidate action user interface element corresponding to the candidate action, a set of digital content based on the set of candidate actions and/or the selected candidate action; and displaying the set of digital content on the display. Selecting a set of digital content may comprise obtaining, such as generating and/or retrieving from the memory of the accessory device, the set of digital content. Selecting a set of digital content may comprise obtaining the set of digital content from a server device. 
     In one or more exemplary methods, displaying the set of digital content on the display comprises displaying the set of digital content on the display in a first application, wherein the first application is an ostomy user application installed on the accessory device. 
     Displaying the set of digital content on the display may comprise displaying on the display, e.g. on a locked screen, a notification indicative of the set of digital content. In one or more exemplary methods, the method comprises detecting a second user input selecting the notification; and in response to detecting the second user input, opening the ostomy user application. Thereby is ensured that a user can see and react on an issue without unlocking the accessory device. 
     Displaying the set of digital content on the display may comprise displaying on the display one of more user interface elements representative of the digital content. 
     The digital content may comprise media content. The media content may comprise video, images and/or text. The media content may comprise a chatbot. The media content may comprise an animation. The media content may comprise augmented reality. 
     In one or more exemplary methods, the method comprises displaying, on the display, a second user interface element prompting the user to provide feedback on the displayed digital content and/or the identified issue. 
     The base plate and/or the sensor assembly part optionally comprises a plurality of electrodes configured to detect presence of fluid on the proximal side of the first adhesive layer, i.e. between the base plate and/or the sensor assembly part and the skin surface of the user, e.g. in a primary sensing zone and/or a secondary sensing zone. The plurality of electrodes may include a first leakage electrode, a second leakage electrode, and a third leakage electrode. Obtaining the monitor data may comprise obtaining monitor data indicative of detection of fluid on the proximal side in the primary sensing zone and/or the secondary sensing zone. The monitor data, e.g. the ostomy data and/or parameter data, may be indicative of resistance between any two of the plurality of electrodes, capacitance and/or inductance between any two of the plurality of electrodes, and/or any change thereof. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a first issue, if the monitor data or parameters based thereon satisfy a first issue criterion. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a first issue, e.g. if the monitor data are indicative of a moisture pattern type being an omnidirectional moisture pattern and a wear time less than a default or expected wear time. The set of candidate actions to the first issue may comprise a candidate action to improve preparation of the skin surface. The set of candidate actions to the first issue may comprise a candidate action to improve preparation, such as cutting, of the base plate and/or the sensor assembly part. The set of candidate actions to the first issue may comprise a candidate action to improve application procedure for the base plate or base plate with sensor assembly part. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a second issue, if the monitor data or parameters based thereon satisfy a second issue criterion. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a second issue, e.g. indicative of irregularities in the skin surface, if the monitor data are indicative of the same directional moisture pattern type for a number of, e.g. at least 2 or at least three, base plate and/or sensor assembly part wear time cycles. The set of candidate actions to the second issue may comprise a candidate action to suggest use of one or more accessories, such as sealing paste and/or sealing ring. The set of candidate actions to the second issue may comprise a candidate action to improve the application procedure. The set of candidate actions to the second issue may comprise a candidate action to evaluate/change clothing style, such as belt position and/or low waist/high waist clothing. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a third issue, if the monitor data or parameters based thereon satisfy a third issue criterion. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a third issue, e.g. indicative of change, e.g. reduction, of wear time, if the monitor data are indicative of a wear time different from a default, expected or average wear time. The set of candidate actions to the third issue may comprise a candidate action to evaluate/change intake, such as diet and/or medicine. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a fourth issue, if the monitor data or parameters based thereon satisfy a fourth issue criterion. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a fourth issue, e.g. indicative of a change of moisture pattern type, if the monitor data are indicative of a change from omni-directional moistory pattern type to directional moisture pattern type, optionally with a reduced wear time. The set of candidate actions to the fourth issue may comprise a candidate action to improve the application procedure. The set of candidate actions to the fourth issue may comprise a candidate action to contact nurse or professional care taker. The set of candidate actions to the fourth issue may comprise a candidate action to contact nurse or professional care taker. The set of candidate actions to the fourth issue may comprise a candidate action to evaluate/change physical activity, such as way of moving, movement pattern and/or physical techniques. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a fifth issue, if the monitor data or parameters based thereon satisfy a fifth issue criterion. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a fifth issue, if the monitor data are indicative of different directional moisture pattern types for a number of, e.g. at least two or at least three, base plate and/or sensor assembly part wear time cycles. The set of candidate actions to the fifth issue may comprise a candidate action to improve preparation, such as cutting, of the base plate and/or the sensor assembly part. The set of candidate actions to the fifth issue may comprise a candidate action to improve application procedure for the base plate and/or the sensor assembly part. The set of candidate actions to the fifth issue may comprise a candidate action to improve the preparation, such as cleaning and drying, of the skin surface. The set of candidate actions to the fifth issue may comprise a candidate action to evaluate/change physical activity, such as way of moving, movement pattern and/or physical techniques. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a sixth issue, if the monitor data or parameters based thereon satisfy a sixth issue criterion. 
     In one or more exemplary methods, determining an issue may comprise determining the issue as a sixth issue, if the monitor data are indicative of change from directional moisture pattern type to omni-directional moisture pattern type with a reduced wear time. The set of candidate actions to the sixth issue may comprise a candidate action to evaluate/change intake, such as diet and/or medicine. The set of candidate actions to the sixth issue may comprise a candidate action to improve the preparation, such as cleaning and drying, of the skin surface. 
     The base plate and/or the sensor assembly part comprises a first adhesive layer. During use, the first adhesive layer adheres to the user&#39;s skin (peristomal area) and/or to additional seals, such as sealing paste, sealing tape and/or sealing ring. Thus, the first adhesive layer may be configured for attachment of the base plate and/or the sensor assembly part to the skin surface of a user. The first adhesive layer has a stomal opening with a centre point or is at least prepared for forming a stomal opening with a centre point. A base plate and/or sensor assembly part according to the present disclosure enables detection of presence and/or angular position of fluid or output on the proximal side of the first adhesive layer (between a skin surface of the user and the proximal surface of the first adhesive layer). 
     The first adhesive layer may be made of a first composition. The first composition may comprise one or more polyisobutenes and/or styrene-isoprene-styrene. The first composition may comprise one or more hydrocolloids. 
     The first composition may be a pressure sensitive adhesive composition suitable for medical purposes comprising a rubbery elastomeric base and one or more water soluble or water swellable hydrocolloids. The first composition may comprise one or more polybutenes, one or more styrene copolymers, one or more hydrocolloids, or any combination thereof. The combination of the adhesive properties of the polybutenes and the absorbing properties of the hydrocolloids renders the first composition suitable for use in ostomy appliances. The styrene copolymer may for example be a styrene-butadiene-styrene block copolymer or a styrene-isoprene-styrene block copolymer. Preferably, one or more styrene-isoprene-styrene (SIS) block type copolymers are employed. The amount of styrene block-copolymer may be from 5% to 20% of the total adhesive composition. The butene component is suitably a conjugated butadiene polymer selected from polybutadiene, polyisoprene. The polybutenes are preferably present in an amount of from 35-50% of the total adhesive composition. Preferably, the polybutene is polyisobutylene (PIB). Suitable hydrocolloids for incorporation in the first composition are selected from naturally occurring hydrocolloids, semisynthetic hydrocolloids, and synthetic hydrocolloids. The first composition may comprise 20-60% hydrocolloids. A preferred hydrocolloid is carboxymethyl cellulose (CMC). The first composition may optionally contain other components, such as fillers, tackifiers, plasticizers, and other additives. 
     The primary sensing zone of the base plate and/or the sensor assembly part is optionally arranged in a primary angle space from the centre point of the first adhesive layer. The primary angle space may span a primary angle in the range from 45° to 315°, such as in the range from 45° to 135°. The primary angle may depend on the number of angular sensing zones on the base plate and/or the sensor assembly part. For example, the primary angle may be about 180°±15°, e.g. for a base plate and/or sensor assembly part with two or more sensing zones. The primary angle may be about 120°±15°, e.g. for a base plate and/or sensor assembly part with two, three or more sensing zones. The primary angle may be about 90°±15°, e.g. for a base plate and/or sensor assembly part with two, three, four or more sensing zones. 
     The secondary sensing zone is optionally arranged in a secondary angle space from the centre point of the first adhesive layer. The secondary angle space may span a secondary angle in the range from 45° to 315°, such as in the range from 45° to 135°. The secondary angle may depend on the number of angular sensing zones on the base plate and/or the sensor assembly part. For example, the secondary angle may be about 180°±15°, e.g. for a base plate and/or sensor assembly part with two or more sensing zones. The secondary angle may be about 120°±15°, e.g. for a base plate and/or sensor assembly part with two, three or more sensing zones. The secondary angle may be about 90°±15°, e.g. for a base plate and/or sensor assembly part with two, three, four or more sensing zones. 
     The plurality of electrodes may be configured to detect presence of fluid on the proximal side in a tertiary sensing zone, the tertiary sensing zone arranged in a tertiary angle space from the centre point of the first adhesive layer. 
     The tertiary angle space may span a tertiary angle in the range from 45° to 315°, such as in the range from 45° to 180°, for example in the range from 45° to 135°. The tertiary angle may depend on the number of angular sensing zones on the base plate and/or the sensor assembly part. For example, the tertiary angle may be about 180°±15°, e.g. for a base plate and/or sensor assembly part with three or more sensing zones. The tertiary angle may be about 120°±15°, e.g. for a base plate and/or sensor assembly part with three or more sensing zones. The tertiary angle may be about 90°±15°, e.g. for a base plate and/or sensor assembly part with three, four or more sensing zones. 
     The primary sensing zone and the secondary sensing zone may be separate sensing zones, i.e. non-overlapping. The primary sensing zone and the tertiary sensing zone may be separate sensing zones, i.e. non-overlapping. The secondary sensing zone and the tertiary sensing zone may be separate sensing zones, i.e. non-overlapping. 
     The primary sensing zone, the secondary sensing zone, and/or the tertiary sensing zone may cover electrodes embedded in the first adhesive layer as well as leakage electrodes being exposed to the surroundings. Thereby, the propagation or absorption of moisture in the first adhesive layer may be detected in one or more of the sensing zones, thereby providing for the determination of the direction of moisture propagation in the first adhesive layer. Likewise, output propagating between the skin of the wearer and the first adhesive layer may be determined by the exposed leakage electrodes. The leakage electrodes may be exposed by means of sensor point openings as described below. 
     The first leakage electrode may comprise one or more primary first sensing parts arranged in the primary sensing zone. The number of primary first sensing parts may be in the range from 3 to 10, e.g. 4, 5, 6 or 7. The number of primary first sensing parts may depend on the primary angle and/or the radial distance of primary first sensing parts from the centre point. The first leakage electrode may comprise one or more tertiary first sensing parts arranged in the tertiary sensing zone. The number of tertiary first sensing parts may be in the range from 3 to 10, e.g. 4, 5, 6 or 7. The number of tertiary first sensing parts may depend on the tertiary angle and/or the radial distance of tertiary first sensing parts from the centre point. In the present disclosure, a reference to ground electrode (or to fourth electrode part of the ground electrode) is a reference to the first leakage electrode. Thus, throughout the present disclosure the first leakage electrode is also referred to as or denoted ground electrode. In other words, the ground electrode acts as the first leakage electrode. 
     The second leakage electrode may comprise one or more primary second sensing parts arranged in the primary sensing zone. The number of primary second sensing parts may be in the range from 3 to 10, e.g. 4, 5, 6 or 7. The number of primary second sensing parts may depend on the primary angle and/or the radial distance of primary second sensing parts from the centre point. The second leakage electrode comprises one or more secondary second sensing parts arranged in the secondary sensing zone. The number of secondary second sensing parts may be in the range from 3 to 10, e.g. 4, 5, 6 or 7. The number of secondary second sensing parts may depend on the secondary angle and/or the radial distance of secondary second sensing parts from the centre point. In the present disclosure, a reference to fourth electrode is a reference to the second leakage electrode. Thus, throughout the present disclosure the second leakage electrode is also referred to as or denoted fourth electrode. In other words, the fourth electrode acts as the second leakage electrode. 
     The third leakage electrode may comprise one or more secondary third sensing parts arranged in the secondary sensing zone. The number of secondary third sensing parts may be in the range from 3 to 10, e.g. 4, 5, 6 or 7. The number of secondary third sensing parts may depend on the secondary angle and/or the radial distance of secondary third sensing parts from the centre point. The third leakage electrode may comprise one or more tertiary third sensing parts arranged in the tertiary sensing zone. The number of tertiary third sensing parts may be in the range from 3 to 10, e.g. 4, 5, 6 or 7. The number of tertiary third sensing parts may depend on the tertiary angle and/or the radial distance of tertiary third sensing parts from the centre point. In the present disclosure, a reference to fifth electrode is a reference to the third leakage electrode. Thus, throughout the present disclosure the third leakage electrode is also referred to as or denoted fifth electrode. In other words, the fifth electrode acts as the third leakage electrode. 
     Obtaining monitor data may comprise obtaining data representative of detection of fluid on the proximal side (or proximal surface) in the primary sensing zone and/or in the secondary sensing zone. The first adhesive layer may have a stomal opening with a centre point. The primary sensing zone may be arranged in a primary angle space from the centre point of the first adhesive layer and the secondary sensing zone may be arranged in a secondary angle space from the centre point of the first adhesive layer. The primary angle space may span a primary angle in the range from 45° to 315°. The secondary angle space may span a secondary angle in the range from 45° to 315°. The primary sensing zone and the secondary sensing zone may be separate sensing zones, such as non-overlapping sensing zones. The first leakage electrode may comprise one or more primary first sensing parts arranged in the primary sensing zone. The second leakage electrode may comprise one or more primary second sensing parts arranged in the primary sensing zone. The second leakage electrode may comprise one or more secondary second sensing parts arranged in the secondary sensing zone. The third leakage electrode may comprise one or more secondary third sensing parts arranged in the secondary sensing zone. Thereby, the accessory device is able to detect and distinguish between a directional leakage and an omni-directional leakage of fluid on the proximal side of the base plate and/or the sensor assembly part, which may result from different issues. 
     The first adhesive layer may have a plurality of sensor point openings. A sensor point opening of the first adhesive layer is configured to overlap a (sensing) part of a leakage electrode, e.g. to form a sensor point. Sensing parts of the first leakage electrode may be exposed to the proximal side of the first adhesive layer via sensor point openings in the first adhesive layer and/or masking element. Sensing parts of the second leakage electrode may be exposed to the proximal side of the first adhesive layer via sensor point openings in the first adhesive layer and/or masking element. Sensing parts of the third leakage electrode may be exposed to the proximal side of the first adhesive layer via sensor point openings in the first adhesive layer and/or masking element. 
     A distance between two neighbouring sensor point openings may be in the range from 1 mm to 20 mm. 
     A sensor point opening of the first adhesive layer may have a suitable shape and size facilitating access to a leakage electrode from the proximal side of the first adhesive layer. 
     A sensor point opening the first adhesive layer may have a circular or oval shape. A sensor point opening the first adhesive layer may have a shape of a rectangle or square optionally with rounded corners. 
     A minimum extension of a sensor point opening of the first adhesive layer may be at least 0.5 mm, such as at least 1 mm. A sufficiently large minimum extension reduces the risk of the first adhesive layer, due to the materials flow capabilities, closing the sensor point opening or at least partly or fully covering the sensing part of the corresponding leakage electrode. 
     A maximum extension of a sensor point opening of the first adhesive layer may be less than 20 mm. 
     An exemplary sensor point opening of the first adhesive layer may have a minimum extension, e.g. measured radially from the centre point, in the range from 1 mm to 4 mm and/or a maximum extension, e.g. measured circumferentially around the centre point, in the range from 2 mm to 6 mm. 
     The sensor point openings of the first adhesive layer may comprise primary sensor point openings. The number of primary sensor point openings may depend on the primary angle and/or the radial distance of primary sensor point openings from the centre point. In one or more exemplary base plates and/or sensor assembly parts, the number of primary sensor point openings is in the range from 5 to 20, such as in the range from 7 to 15. The primary sensor point openings may comprise one or more primary first sensor point openings and one or more primary second sensor point openings, the primary first sensor point openings configured to overlap (sensing) parts of a leakage electrode and the primary second sensor point openings configured to overlap (sensing) parts of another leakage electrode different from the leakage electrode at least partly overlapped by the primary first sensor point openings. 
     The sensor point openings of the first adhesive layer may comprise secondary sensor point openings. The number of secondary sensor point openings may depend on the secondary angle and/or the radial distance of secondary sensor point openings from the centre point. In one or more exemplary base plates and/or sensor assembly parts, the number of secondary sensor point openings is in the range from 5 to 20, such as in the range from 7 to 15. The secondary sensor point openings may comprise one or more secondary first sensor point openings and one or more secondary second sensor point openings, the secondary first sensor point openings configured to overlap (sensing) parts of an electrode and the secondary second sensor point openings configured to overlap (sensing) parts of another electrode different from the electrode at least partly overlapped by the secondary first sensor point openings. 
     The sensor point openings of the first adhesive layer may comprise tertiary sensor point openings. The number of tertiary sensor point openings may depend on the tertiary angle and/or the radial distance of tertiary sensor point openings from the centre point. In one or more exemplary base plates and/or sensor assembly parts, the number of tertiary sensor point openings is in the range from 5 to 20, such as in the range from 7 to 15. The tertiary sensor point openings may comprise one or more tertiary first sensor point openings and one or more tertiary third sensor point openings, the tertiary first sensor point openings configured to overlap (sensing) parts of a (first) leakage electrode and the tertiary third sensor point openings configured to overlap (sensing) parts of another (third) leakage electrode different from the electrode at least partly overlapped by the tertiary first sensor point openings. 
     The first adhesive layer may have a substantially uniform thickness. The first adhesive layer may have a thickness in the range from 0.1 mm to 1.5 mm, e.g. in the range from 0.2 mm to 1.2 mm, such as 0.8 mm or 1.0 mm. 
     The first adhesive layer may have a primary thickness in a primary part of the first adhesive layer, e.g. in a primary region within a primary radial distance or in a primary radial distance range from the centre point of the stomal opening. The primary thickness may be in the range from 0.2 mm to 1.5 mm, such as about 1.0 mm. The primary radial distance may be in the range from 20 mm to 50 mm, such as in the range from 25 mm to 35 mm, e.g. 30 mm. 
     The first adhesive layer may have a secondary thickness in a secondary part of the first adhesive layer, e.g. in a secondary region outside a secondary radial distance or in a secondary radial distance range from the centre point of the stomal opening. The secondary thickness may be in the range from 0.2 mm to 1.0 mm, such as about 0.5 mm. The secondary radial distance may be in the range from 20 mm to 50 mm, such as in the range from 25 mm to 35 mm, e.g. 30 mm. 
     The base plate and/or the sensor assembly part may comprise a second layer. The second layer may be an adhesive layer. The second layer may have a second radial extension that is larger than a first radial extension of the first adhesive layer at least in a first angular range of the base plate and/or the sensor assembly part. Accordingly, a part of a proximal surface of the second layer may be configured for attachment to the skin surface of a user. The part of a proximal surface of the second layer configured for attachment to the skin surface of a user is also denoted the skin attachment surface of the second adhesive layer. The second layer may have a stomal opening with a centre point. 
     The second adhesive layer may be made of a second composition. The second composition may comprise one or more polyisobutenes and/or styrene-isoprene-styrene. The second composition may comprise one or more hydrocolloids. 
     The second composition may be a pressure sensitive adhesive composition suitable for medical purposes comprising a rubbery elastomeric base and one or more water soluble or water swellable hydrocolloids. The second composition may comprise one or more polybutenes, one or more styrene copolymers, one or more hydrocolloids, or any combination thereof. The combination of the adhesive properties of the polybutenes and the absorbing properties of the hydrocolloids renders the second composition suitable for use in ostomy appliances. The styrene copolymer may for example be a styrene-butadiene-styrene block copolymer or a styrene-isoprene-styrene block copolymer. Preferably, one or more styrene-isoprene-styrene (SIS) block type copolymers are employed. The amount of styrene block-copolymer may be from 5% to 20% of the total adhesive composition. The butene component is suitably a conjugated butadiene polymer selected from polybutadiene, polyisoprene. The polybutenes are preferably present in an amount of from 35-50% of the total adhesive composition. Preferably, the polybutene is polyisobutylene (PIB). Suitable hydrocolloids for incorporation in the second composition are selected from naturally occurring hydrocolloids, semisynthetic hydrocolloids, and synthetic hydrocolloids. The second composition may comprise 20-60% hydrocolloids. A preferred hydrocolloid is carboxymethyl cellulose (CMC). The second composition may optionally contain other components, such as fillers, tackifiers, plasticizers, and other additives. 
     Different ratio of contents may change properties of the first and/or second adhesive layers. The second adhesive layer and the first adhesive layer may have different properties. The second adhesive layer (second composition) and the first adhesive layer (first composition) may have different ratios of polyisobutenes, styrene-isoprene-styrene, and/or hydrocolloids. For example, the second adhesive layer may provide a stronger attachment to the skin compared to attachment to the skin provided by the first adhesive layer. Alternatively, or additionally, the second adhesive layer may be thinner than the first adhesive layer. Alternatively, or additionally, the second adhesive layer may be less water and/or sweat absorbing than the first adhesive layer. Alternatively, or additionally, the second adhesive layer may be less mouldable than the first adhesive layer. The second adhesive layer may provide a second barrier against leakage. 
     The second layer may have a substantially uniform thickness. The second layer may have a thickness in the range from 0.1 mm to 1.5 mm, e.g. in the range from 0.2 mm to 1.0 mm, such as 0.5 mm, 0.6 mm, or 0.7 mm. 
       FIG. 1  illustrates an exemplary ostomy system. The ostomy system  1  comprises an ostomy appliance  2  including a base plate  4 . The base plate  4  is adapted to support an ostomy pouch (not shown). Further, the ostomy system  1  comprises a monitor device  6  and an accessory device  8  (mobile telephone). The monitor device  6  is connectable to the base plate  4  via respective first connectors of the monitor device  6  and base plate  4 . The monitor device  6  is configured for wireless communication with the accessory device  8 . Optionally, the accessory device  8  is configured to communicate with a server device  10  of the ostomy system  1 , e.g. via network  12 . The server device  10  may be operated and/or controlled by the ostomy appliance manufacturer and/or a service centre. Ostomy data or parameter data based on the ostomy data are obtained from electrodes/sensors of the ostomy appliance  2  with the monitor device  6 . The monitor device  6  processes the ostomy data and/or parameter data based on the ostomy data. Based on the processed ostomy data, the monitor device  6  may determine what monitor data that are transmitted to the accessory device  8 . In the illustrated ostomy system, the accessory device  8  is a mobile phone, however the accessory device  8  may be embodied as another handheld device, such as a tablet device, or a wearable, such as a watch or other wrist-worn electronic device. Accordingly, the monitor device  6  is configured to determine monitor data and transmit the monitor data to the accessory device  8 . The base plate  4  comprises a coupling member  14  in the form of a coupling ring  16  for coupling an ostomy pouch (not shown) to the base plate (two-part ostomy appliance). The base plate  4  has a stomal opening  18  with a centre point  19 . The size and/or shape of the stomal opening  18  is typically adjusted by the user or nurse before application of the ostomy appliance to accommodate the user&#39;s stoma. 
     The ostomy system  1  optionally comprises a docking station  20  forming an alternative/additional accessory device of the ostomy system  1 . The docking station  20  comprises a docking monitor interface including a first connector  22  configured for electrically and/or mechanically connecting the monitor device  6  to the docking station  20 . The docking monitor interface may be configured for wirelessly connecting the monitor device to the docking station. The docking station  20  comprises a user interface  24  for receiving user input and/or providing feedback to the user on the operational state of the docking station  20 . The user interface  24  may comprise a touch-screen. The user interface  24  may comprise one or more physical buttons and/or one or more visual indicators, such as light emitting diodes. 
       FIG. 2  is a schematic block diagram of an exemplary monitor device. The monitor device  6  comprises a monitor device housing  100 , a processor  101 , and one or more interfaces, the one or more interfaces including a first interface  102  (appliance interface) and a second interface  104  (accessory interface). The monitor device  6  comprises a memory  106  for storing ostomy data and/or parameter data based on the ostomy data. The memory  106  is connected to the processor  101  and/or the first interface  102 . 
     The first interface  102  is configured as an appliance interface for electrically and/or mechanically connecting the monitor device  6  to the ostomy appliance, e.g. ostomy appliance  2 . The first interface  102  comprises a plurality of terminals for forming electrical connections with respective terminals of the ostomy appliance  2  (base plate  4 ). The first interface  102  comprises a ground terminal  108 , a first terminal  110 , a second terminal  112  and a third terminal  114 . The first interface  102  optionally comprises a fourth terminal  116  and a fifth terminal  118 . The first interface  102  of the monitor device  6  comprises a coupling part  120  for forming a mechanical connection, such as a releasable coupling between the monitor device and the base plate. The coupling part  120  and the terminals  108 ,  110 ,  112 ,  114 ,  116 , and  118  of the first interface  102  form (at least part of) a first connector of the monitor device  6 . 
     The monitor device  6  comprises a power unit  121  for powering the monitor device and active components thereof, i.e. the power unit  121  is connected to the processor  101 , the first interface  102 , the second interface  104 , and memory  106 . The power unit comprises a battery and charging circuitry. The charging circuitry is connected to the battery and terminals of the first interface  102  for charging the battery via terminals of the first interface, e.g. terminals of the first connector. 
     The second interface  104  of monitor device is configured as an accessory interface for connecting the monitor device  6  to one or more accessory devices such as accessory device  8 . The second interface  104  comprises an antenna  122  and a wireless transceiver  124  configured for wireless communication with accessory device(s). Optionally, the second interface  104  comprises a loudspeaker  126  and/or a haptic feedback element  128  for provision of respective audio signal and/or haptic feedback to the user. 
     The monitor device  6  optionally comprises a sensor unit  140  connected to the processor  101 . For example, the sensor unit  140  may comprise a temperature sensor for feeding temperature data to the processor and/or a G-sensor or accelerometer for feeding acceleration data to the processor  101 . Additionally or alternatively, the sensor unit  140  comprises a humidity sensor and/or an acoustic sensor. The sensor unit  140  may comprise alternative and/or additional sensors suitable and/or relevant to an ostomy system as described. 
     The processor  101  is configured to obtain primary leakage parameter data based on the primary leakage ostomy data and obtain secondary leakage parameter data based on the secondary leakage ostomy data, wherein the primary leakage parameter data and the secondary leakage parameter data are indicative of a resistance between electrodes of the primary electrode set and the secondary electrode set, respectively. Further, the processor  101  is configured to detect presence of fluid on the proximal side of the first adhesive layer in a primary sensing zone of the base plate and/or the sensor assembly part based on the primary leakage parameter data, the primary sensing zone arranged in a primary angle space from the centre point of the first adhesive layer and to detect presence of fluid on the proximal side of the first adhesive layer in a secondary sensing zone of the base plate and/or the sensor assembly part based on the secondary leakage parameter data, the secondary sensing zone arranged in a secondary angle space from the centre point of the first adhesive layer. The processor  101  is configured to in accordance with a detection of presence of fluid in the primary sensing zone, transmit a primary leakage monitor signal comprising monitor data indicative of presence of fluid in the primary sensing zone via the second interface; and in accordance with a detection of presence of fluid in the secondary sensing zone, transmit a secondary leakage monitor signal comprising monitor data indicative of presence of fluid in the secondary sensing zone via the second interface. 
     For monitor device  6 , the ostomy data obtained from base plate and/or sensor assembly part may comprise tertiary leakage ostomy data from a tertiary electrode set of the base plate and/or the sensor assembly part, wherein the processor  101  is optionally configured to: obtain tertiary leakage parameter data based on the primary leakage ostomy data; detect presence of fluid on the proximal side of the first adhesive layer in a tertiary sensing zone of the base plate and/or the sensor assembly part based on the tertiary leakage parameter data, the tertiary sensing zone arranged in a tertiary angle space from the centre point of the first adhesive layer; and in accordance with a detection of presence of fluid in the tertiary sensing zone, transmit a tertiary leakage monitor signal comprising monitor data indicative of presence of fluid in the tertiary sensing zone via the second interface. 
     In monitor device  6 , to detect presence of fluid on the proximal side of the first adhesive layer in a primary sensing zone is based on a primary leakage criterion set based on the primary leakage parameter data, wherein fluid is present in the primary sensing zone if the primary leakage criteria set is satisfied, and wherein the primary leakage criteria set is based on a primary leakage threshold value stored in the memory. Further, to detect presence of fluid on the proximal side of the first adhesive layer in a secondary sensing zone is based on a secondary leakage criterion set based on the secondary leakage parameter data, wherein fluid is present in the secondary sensing zone if the secondary leakage criteria set is satisfied, and wherein the secondary leakage criteria set is based on a secondary leakage threshold value stored in the memory. Optionally and if a tertiary sensing zone is implemented, to detect presence of fluid on the proximal side of the first adhesive layer in a tertiary sensing zone is based on a tertiary leakage criteria set based on the tertiary leakage parameter data, wherein fluid is present in the tertiary sensing zone if the tertiary leakage criteria set is satisfied, and wherein the tertiary leakage criteria set is based on a tertiary leakage threshold value stored in the memory. 
       FIG. 3  illustrates an exploded view of an exemplary base plate of an ostomy appliance. The base plate  4  comprises a first adhesive layer  200  with a stomal opening  18 A. During use, a proximal surface of the first adhesive layer  200  adheres to the user&#39;s skin in the peristomal area and/or to additional seals, such as sealing paste, sealing tape and/or sealing ring. The base plate  4  optionally comprises a second adhesive layer  202 , also denoted rim adhesive layer, with a stomal opening  18 B. The base plate  4  comprises a plurality of electrodes arranged in an electrode assembly  204 . The electrode assembly  204  is arranged between the first adhesive layer  200  and the second adhesive layer  202 . The electrode assembly  204  comprises a support layer with stomal opening  18 C and electrodes formed on a proximal surface of the support layer. The base plate  4  comprises a release liner  206  that is peeled off by the user prior to applying the base plate  4  on the skin. The base plate  4  comprises a top layer  208  with a stomal opening  18 D and a coupling ring  209  for coupling an ostomy pouch to the base plate  4 . The top layer  208  is a protective layer protecting the second adhesive layer  202  from external strains and stress during use. 
     The base plate  4  comprises a monitor interface. The monitor interface is configured for electrically and/or mechanically connecting the ostomy appliance (base plate  4 ) to the monitor device. The monitor interface of the base plate comprises a coupling part  210  for forming a mechanical connection, such as a releasable coupling between the monitor device and the base plate. The coupling part  210  is configured to engage with a coupling part of the monitor device for releasably coupling the monitor device to the base plate  4 . Further, the monitor interface of the base plate  4  comprises a plurality of terminal elements respectively forming a plurality of terminals  212  for forming electrical connections with respective terminals of the monitor device. The coupling part  210  and the terminals  212  form a first connector  211  of the base plate  4 . The base plate  4  comprises a first intermediate element  213  on the distal side of the electrode assembly. The first intermediate element  213  is arranged between the terminal elements forming terminals  212  and the first adhesive layer (not shown). The first intermediate element  213  covers the terminal elements forming terminals  212  of the base plate  4  when seen in the axial direction and protects the first adhesive layer from mechanical stress from the terminal elements of the base plate. 
     As previously described, some parts of the illustrated base plate  4 , may be provided as a separate assembly to be applied to an existing base plate, e.g. comprising one or more of the components as described, such as to provide a base plate like the base plate  4  as described. For example, a sensor assembly part  700  may be provided, e.g. comprising the electrode assembly  204 , the first connector  211 , the first intermediate element  213 , the first adhesive layer  200  and the release liner  206 . Additionally, the sensor assembly part  700  may also comprise the second adhesive layer  202  and/or the top layer  208 . It may be envisioned that the user may provide a hole in layers of the base plate whereto the sensor assembly part  700  is to be applied, to allow for the first connector  211  of the sensor assembly part  700  to protrude through layers of the base plate whereto the sensor assembly part  700  is applied. Alternatively, the sensor assembly part  700  may be applied to the base plate such that the first connector  211  is positioned outside the periphery of the base plate. 
       FIG. 4  illustrates an exploded view of an exemplary electrode assembly  204  of a base plate and/or a sensor assembly part. The electrode assembly  204  has a distal side  204 A and a proximal side  204 B. The electrode assembly  204  comprises a support layer  214  with proximal surface  214 B and electrodes  216  arranged on the proximal side of the support layer  214  and including a ground electrode, a first electrode, a second electrode, a third electrode, a fourth electrode, and a fifth electrode, wherein each electrode has a respective connection part  217  for connecting the electrodes  216  to respective terminal elements of the monitor interface. The electrodes  216  are positioned and/or formed on a proximal side  214 B of the support layer  214 . Further, electrode assembly  204  comprises a masking element  218  with proximal surface  218 B and configured to insulate electrode parts of electrodes  216  from the first adhesive layer of the base plate and/or the sensor assembly part. The masking element  218  covers or overlap with parts of the electrodes  216  when seen in the axial direction. 
       FIG. 5  is a proximal view of proximal surfaces of base plate parts of the base plate and/or the sensor assembly part without the first adhesive layer and the release liner. The base plate  4  and/or the sensor assembly part  700  comprises a first intermediate element  213  on the proximal side of the electrode assembly, i.e. between the electrode assembly  204  and the first adhesive layer (not shown). The first intermediate element  213  covers the terminal elements of the base plate  4  when seen in the axial direction and protects the first adhesive layer from mechanical stress from the terminal elements of the base plate and/or the sensor assembly part. 
       FIG. 6  is a distal view of an exemplary electrode configuration  220  of electrodes  216  of the electrode assembly  204 . The electrode assembly  204 , such as the electrode configuration  220  of the electrode assembly  204  comprises a ground electrode  222 , a first electrode  224 , a second electrode  226 , a third electrode  228 , a fourth electrode  230 , and a fifth electrode  232 . The ground electrode  222  comprises a ground connection part  222 A and the first electrode  224  comprises a first connection part  224 A. The second electrode  226  comprises a second connection part  226 A and the third electrode  228  comprises a third connection part  228 A. The fourth electrode  230  comprises a fourth connection part  230 A and the fifth electrode  232  comprise a fifth connection part  232 A. 
     The fourth electrode (second leakage electrode)  230  comprises fourth sensing parts  230 B. The fifth electrode (third leakage electrode)  232  comprises fifth sensing parts  232 B. 
     The ground electrode  222  comprises a first electrode part  234  for forming a ground or reference for the first electrode  224 . The ground electrode  222  comprises a second electrode part  236  for forming a ground or reference for the second electrode  226 . The ground electrode  222  comprises a third electrode part  238  for forming a ground or reference for the third electrode  228 . The masking element  218  is arranged proximal to the electrodes  222 ,  224 ,  226 ,  228  covering and insulating parts of the electrodes from the first adhesive and forming respective conductor parts of the electrodes  222 ,  224 ,  226 ,  228 . The parts of the electrodes  222 ,  224 ,  226 ,  228  not covered by the masking element  219  contacts the first adhesive layer and form sensing parts  224 B,  226 B,  228 B of electrodes  224 ,  226 ,  228 , respectively. Further, the electrode parts  234 ,  236 ,  238  form sensing parts of the ground electrode  222 . 
     The first sensing part  224 B extends circularly at least 330 degrees around the stomal opening at a first radial distance R 1  from the centre point  19 , see also  FIG. 11 . The first radial distance R 1  is 14 mm. The first electrode part  234  is arranged on the inside of the first sensing part (i.e. closer to the centre point) and extends circularly at least 330 degrees around the stomal opening at a first ground distance RG 1  from the first sensing part (radially from the centre point). The first ground distance RG 1  is about 1 mm. 
     The second sensing part  226 B extends circularly at least 330 degrees around the stomal opening at a second radial distance R 2  from the centre point  19 , see also  FIG. 11 . The second radial distance R 2  is 18 mm. The second electrode part  236  is arranged on the inside of the second sensing part  226 B (i.e. closer to the centre point) and extends circularly at least 330 degrees around the stomal opening at a second ground distance RG 2  from the second sensing part  226 B (radially from the centre point). The second ground distance RG 2  is about 1 mm. 
     The third sensing part  228 B extends circularly at least 330 degrees around the stomal opening at a third radial distance R 3  from the centre point  19 , see also  FIG. 11 . The third radial distance R 3  is about 26 mm. The third electrode part  238  is arranged on the inside of the third sensing part  228 B (i.e. closer to the centre point) and extends circularly at least 330 degrees around the stomal opening at a third ground distance RG 3  from the third sensing part  228 B (radially from the centre point). The third ground distance RG 3  is about 1 mm. 
     The ground electrode  222  comprises a fourth electrode part  240  for forming a ground or reference for the fourth electrode  230  and the fifth electrode  232 . The fourth electrode part  240  of the ground electrode forms the first leakage electrode. The fourth electrode part  240  of the ground electrode  222  extends at least 300 degrees around the stomal opening and comprises ground sensing parts  222 B. The fourth sensing parts  230 B, fifth sensing parts  232 B, and ground sensing parts of the fourth electrode part  240  are circularly distributed around the centre point  19  at a leakage radius from the centre point. The fourth sensing parts  230 B, fifth sensing parts  232 B, and ground sensing parts of the fourth electrode part may have a radial extension larger than 1.0 mm, such as in the range from 1.5 mm to 3.0 mm, e.g. about 2.0 mm. The fourth sensing parts  230 B, fifth sensing parts  232 B, and ground sensing parts of the fourth electrode part  240  may have a circumferential extension (perpendicular to the radial extension) larger than 1.0 mm, such as in the range from 2.5 mm to 5.0 mm, e.g. about 3.5 mm. In one or more exemplary base plates and/or sensor assembly parts, the electrodes  224 ,  226 ,  228  and electrode parts  234 ,  236 ,  238  may be omitted from the electrode configuration/electrode assembly. 
       FIG. 7  is a distal view of an exemplary masking element. The masking element  218  optionally has a plurality of terminal openings including six terminal openings. The plurality of terminal openings comprises a ground terminal opening  242 , a first terminal opening  244 , a second terminal opening  246 , a third terminal opening  248 , a fourth terminal opening  250 , and a fifth terminal opening  252 . The terminal openings  242 ,  244 ,  246 ,  248 ,  250 ,  252  of the masking element  218  are configured to overlap and/or be aligned with respective connection parts  222 A,  224 A,  226 A,  228 A,  230 A,  232 A of the electrodes of the electrode assembly. 
     The masking element  218  has a plurality of sensor point openings. The sensor point openings comprise primary sensor point openings shown within dotted line  254 , each primary sensor point opening configured to overlap a part of the ground electrode (first leakage electrode)  222  and/or a part of the fourth electrode (second leakage electrode)  230 . The primary sensor point openings  254  comprise, in the illustrated exemplary masking element, five primary sensor point openings  254 A each configured to overlap a respective sensing part of the ground electrode (first leakage electrode)  222 . The primary sensor point openings  254  comprise, in the illustrated exemplary masking element, four primary sensor point openings  254 B each configured to overlap a respective sensing part of the fourth electrode (second leakage electrode)  230 . The sensor point openings comprise secondary sensor point openings shown within dotted line  256 , each second sensor point opening configured to overlap a part of the fourth electrode (second leakage electrode)  230  and/or a part of the fifth electrode (third leakage electrode)  232 . The secondary sensor point openings  256  comprise, in the illustrated exemplary masking element, five secondary sensor point openings  256 A each configured to overlap a respective sensing part of the fifth electrode (third leakage electrode)  232 . The secondary sensor point openings  256  comprise, in the illustrated exemplary masking element, four secondary sensor point openings  256 B each configured to overlap a respective sensing part of the fourth electrode (second leakage electrode)  230 . The sensor point openings comprise tertiary sensor point openings shown within dotted line  258 , each tertiary sensor opening configured to overlap a part of the fifth electrode (third leakage electrode)  232  and/or a part of the ground electrode (first leakage electrode)  222 . The tertiary sensor point openings  258  comprise, in the illustrated exemplary masking element, five tertiary sensor point openings  258 A each configured to overlap a respective sensing part of the fifth electrode (third leakage electrode)  232 . The tertiary sensor point openings  258  comprise, in the illustrated exemplary masking element, four tertiary sensor point openings  258 B each configured to overlap a respective sensing part of the ground electrode (first leakage electrode)  222 . The sensor point openings  254 A,  254 B,  256 A,  256 B,  258 A,  258 B, are circularly arranged at a leakage radius of about 30 mm from the centre point  19 . 
       FIG. 8  is a distal view of an exemplary first adhesive layer. The first adhesive layer  200  has a plurality of sensor point openings. The sensor point openings of the first adhesive layer comprise primary sensor point openings shown within dotted line  260 , each primary sensor point opening configured to overlap a part of the ground electrode  222  and/or a part of the fourth electrode  230  of the electrode assembly. The primary sensor point openings comprise, in the illustrated exemplary first adhesive layer, five primary sensor point openings  260 A each configured to overlap a respective sensing part of the ground electrode  222 . The primary sensor point openings comprise, in the illustrated exemplary first adhesive layer, four primary sensor point openings  260 B each configured to overlap a respective sensing part of the fourth electrode  230 . The sensor point openings of the first adhesive layer comprise secondary sensor point openings shown within dotted line  262 , each second sensor point opening configured to overlap a part of the fourth electrode  230  and/or a part of the fifth electrode  232  of the electrode assembly. The secondary sensor point openings comprise, in the illustrated exemplary first adhesive layer, five secondary sensor point openings  262 A each configured to overlap a respective sensing part of the fifth electrode  232 . The secondary sensor point openings comprise, in the illustrated exemplary first adhesive layer, four secondary sensor point openings  262 B each configured to overlap a respective sensing part of the fourth electrode  230 . The sensor point openings of the first adhesive layer comprise tertiary sensor point openings shown within dotted line  264 , each tertiary sensor opening configured to overlap a part of the fifth electrode  232  and/or a part of the ground electrode  222  of the electrode assembly. The tertiary sensor point openings comprise, in the illustrated exemplary first adhesive layer, five tertiary sensor point openings  264 A each configured to overlap a respective sensing part of the fifth electrode  232 . The tertiary sensor point openings comprise, in the illustrated exemplary first adhesive layer, four tertiary sensor point openings  264 B each configured to overlap a respective sensing part of the ground electrode  222 . 
       FIG. 9  is a proximal view of the first adhesive layer of  FIG. 8 . The sensor point openings  260 A,  260 B,  262 A,  262 B,  264 A,  264 B, are circularly arranged at a leakage radius of about 30 mm from the centre point. 
       FIG. 10  is a more detailed distal view of a part of the base plate  4  and/or the sensor assembly part  700 . The base plate  4  and/or the sensor assembly part  700  comprises a monitor interface. The monitor interface comprises the first connector  211 . The first connector  211  comprises coupling part  210  configured to releasably couple the monitor device to the base plate and/or the sensor assembly part and thus forming a releasable coupling. The first connector  211  of the monitor interface comprises a plurality of terminals formed by respective terminal elements for forming respective electrical connections with respective terminals of the monitor device. 
     The plurality of terminals of the first connector  211  of the monitor interface comprises a ground terminal element  282  forming a ground terminal  282 A, a first terminal element  284  forming a first terminal  284 , a second terminal element  286  forming a second terminal  286 A, and optionally a third terminal element  288  forming a third terminal  288 A. The monitor interface optionally comprises a fourth terminal element  290  forming a fourth terminal  290 A and/or a fifth terminal element  292  forming a fifth terminal  292 A. The terminal elements  282 ,  284 ,  286 ,  288 ,  290 ,  292  contact respective connection parts  222 A,  224 A,  226 A,  228 A,  230   a ,  232 A of electrodes  222 ,  224 ,  226 ,  228 ,  230 ,  232 . 
     The position of the first connector on the base plate and/or the sensor assembly part, the number of terminals and the position of the terminals in the coupling part may be adapted to the electrode configuration used in the electrode assembly of the base plate and/or the sensor assembly part. For example, a first connector for a base plate and/or a sensor assembly part with the electrode configuration  220 A shown in  FIG. 11  comprises four terminals respectively connected to connection parts  222 A,  224 A,  226 A,  228 A of the electrodes, and a first connector for a base plate and/or a sensor assembly part with the electrode configuration  220 B shown in  FIG. 12  comprises three terminals respectively connected to connection parts  222 A,  224 A,  226 A of the electrodes. 
       FIG. 11  is a distal view of the exemplary electrode configuration  220  of  FIG. 6  for a base plate and/or a sensor assembly part. The electrode configuration  220  comprises a first leakage electrode  222 , second leakage electrode  230 , and third leakage electrode  232 . The leakage electrodes  222 ,  230 ,  232  are configured to detect presence of fluid on the proximal side of the first adhesive layer in three angular sensing zones, primary sensing zone  400 , secondary sensing zone  402 , and tertiary sensing zone  404 . The primary sensing zone  400  is arranged in a primary angle space between a first direction  406  and a second direction  408  from the centre point  19 , wherein the primary angle space spans a primary angle V 1  of 120°. The secondary sensing zone  402  is arranged in a secondary angle space between the second direction  408  and a third direction  410  from the centre point  19 , wherein the secondary angle space spans a secondary angle V 2  of 120°. The tertiary sensing zone  404  is arranged in a tertiary angle space between the third direction  410  and the first direction  406  from the centre point  19 , wherein the tertiary angle space spans a tertiary angle V 3  of 120°. 
     The first leakage electrode  222  comprises five primary sensing parts  222 D arranged in the primary sensing zone  400 , and four tertiary sensing parts  222 E arranged in the tertiary sensing zone  404 . Each primary sensing part  222 D is aligned with a respective primary sensor point opening  254 A of the masking element  218  (see  FIG. 7 ). Further, each primary sensing part  222 D is aligned with a respective primary sensor point opening  260 A of the first adhesive layer  200  (see  FIG. 8 ). Each tertiary sensing part  222 E of the first leakage electrode  222  is aligned with a respective tertiary sensor point opening  258 B of the masking element  218  (see  FIG. 7 ). Further, each tertiary first sensing part  222 E is aligned with a respective tertiary sensor point opening  264 B of the first adhesive layer  200  (see  FIG. 8 ). 
     The second leakage electrode  230  comprises four primary sensing parts  230 D arranged in the primary sensing zone  400 , and four secondary sensing parts  230 E arranged in the secondary sensing zone  402 . Each primary sensing part  230 D is aligned with a respective primary sensor point opening  254 B of the masking element  218  (see  FIG. 7 ). Further, each primary sensing part  230 D is aligned with a respective primary sensor point opening  260 B of the first adhesive layer  200  (see  FIG. 8 ). Each secondary sensing part  230 E is aligned with a respective secondary sensor point opening  256 B of the masking element  218  (see  FIG. 7 ). Further, each secondary sensing part  230 E is aligned with a respective secondary sensor point opening  262 B of the first adhesive layer  200  (see  FIG. 8 ). 
     The third leakage electrode  232  comprises five secondary sensing parts  232 D arranged in the secondary sensing zone  402 , and five tertiary sensing parts  232 E arranged in the tertiary sensing zone  404 . Each secondary sensing part  232 D is aligned with a respective secondary sensor point opening  256 A of the masking element  218  (see  FIG. 7 ). Further, each secondary sensing part  232 D is aligned with a respective secondary sensor point opening  262 A of the first adhesive layer  200  (see  FIG. 8 ). Each tertiary sensing part  232 E is aligned with a respective tertiary sensor point opening  258 A of the masking element  218  (see  FIG. 7 ). Further, each tertiary sensing part  232 E is aligned with a respective tertiary sensor point opening  264 A of the first adhesive layer  200  (see  FIG. 8 ). 
     The sensing parts  222 D,  222 E,  230 D,  230 E,  232 D,  232 E are circularly arranged at a leakage radius RL of about 30 mm from the centre point. 
       FIG. 12  is a distal view of an exemplary electrode configuration  220 A for a base plate and/or a sensor assembly part. The electrode configuration  220  comprises a first leakage electrode  222 , second leakage electrode  230 , and third leakage electrode  232 . The leakage electrodes  222 ,  230 ,  232  are configured to detect presence of fluid on the proximal side of the first adhesive layer in two angular sensing zones, primary sensing zone  400  and secondary sensing zone  402 . The primary sensing zone  400  is arranged in a primary angle space between a first direction  406  and a second direction  408  from the centre point  19 , wherein the primary angle space spans a primary angle V 1  of about 185°. The secondary sensing zone  402  is arranged in a secondary angle space between the second direction  408  and the first direction  406  from the centre point  19 , wherein the secondary angle space spans a secondary angle V 2  of about 175°. 
     The first leakage electrode  222  comprises primary sensing parts  222 D arranged in the primary sensing zone  400 , and secondary sensing parts  222 F arranged in the secondary sensing zone  402 . The second leakage electrode  230  comprises primary sensing parts  230 D arranged in the primary sensing zone  400 . The third leakage electrode  232  comprises secondary sensing parts  232 D arranged in the secondary sensing zone  402 . Each primary sensing part  222 D,  230 D is aligned with a respective primary sensor point opening of the masking element  219  (see  FIG. 13 ) and with a respective primary sensor point opening of the first adhesive layer  201  (see  FIG. 14 ). The sensing parts  222 D,  222 F,  230 D, and  232 D are circularly arranged at a leakage radius RL of about 30 mm from the centre point. 
       FIG. 13  is a distal view of masking layer  219  for electrode configuration  220 A in  FIG. 12 . The masking layer  219  comprises primary sensor point openings  254  in the primary angle space and secondary sensor point openings  256  in the secondary angle space. 
       FIG. 14  is a distal view of first adhesive layer  201  for electrode configuration  220 A in  FIG. 12  implementing a base plate and/or a sensor assembly part with two sensing zones arranged in separate angle spaces. The first adhesive layer  201  comprises primary sensor point openings  260  in the primary angle space and secondary sensor point openings  262  arranged in the secondary angle space. 
       FIG. 15  is a distal view of an exemplary electrode configuration  220 B for a base plate and/or a sensor assembly part. The electrode configuration  220 B comprises first leakage electrode  222 , second leakage electrode  230 , third leakage electrode  232 , fourth leakage electrode  412 , and fifth leakage electrode  414 . The leakage electrodes  222 ,  230 ,  232 ,  412 ,  414  are configured to detect presence of fluid on the proximal side of the first adhesive layer in four angular sensing zones  400 ,  402 ,  404 ,  416 . The primary sensing zone  400  is arranged in a primary angle space spanning a primary angle V 1  of about 85°. The secondary sensing zone  402  is arranged in a secondary angle space spanning a secondary angle V 2  of about 95°. The tertiary sensing zone  404  is arranged in a tertiary angle space spanning a tertiary angle V 3  of about 95°. The quaternary sensing zone  416  is arranged in a quaternary angle space spanning a quaternary angle V 4  of about 85°. 
     While exemplary base plates and/or sensor assembly parts with two, three and four sensing zones have been described in more detail, the base plate and/or the sensor assembly part may comprise one or a larger number of sensing zones, such as five, six, seven, eight or more sensing zones. 
       FIG. 16  is a flow diagram of an exemplary method according to the present disclosure. The method  1000  is performed or at least partly performed in an accessory device, e.g. accessory device  8 , wherein the accessory device comprises an interface configured to communicate with one or more devices of an ostomy system, e.g. ostomy system  1 , the interface comprising a display, wherein the ostomy system comprises a monitor device, e.g. monitor device  6 , and/or an ostomy appliance, e.g. ostomy appliance  2 , the ostomy appliance being configured to be placed on a skin surface of a user, wherein the ostomy appliance comprises a base plate and/or a sensor assembly part, the method  1000  comprising obtaining  1002  monitor data from the monitor device, wherein the monitor data is indicative of presence of fluid at a proximal side of a first adhesive layer of the base plate and/or the sensor assembly part towards the skin surface; determining  1004  an issue based on the monitor data, wherein the issue is related to the ostomy appliance; identifying  1006 , based on the determined issue, a set of candidate actions to the issue from a plurality of possible actions; selecting  1008  a set of digital content based on the set of candidate actions; and displaying  1010  the set of digital content on the display. In the method  1000 , the base plate and/or the sensor assembly part optionally comprises a plurality of electrodes configured to detect presence of fluid on the proximal side in a primary sensing zone, a secondary sensing zone and optionally a tertiary sensing zone, the plurality of electrodes including a first leakage electrode, a second leakage electrode, and a third leakage electrode, and wherein obtaining the monitor data may comprise obtaining monitor data indicative of detection of fluid on the proximal side in the primary sensing zone, the secondary sensing zone and optionally the tertiary sensing zone. 
     The monitor data comprises ostomy data and/or parameter data based on ostomy data, wherein the ostomy data and/or parameter data is optionally indicative of resistance between any two of the plurality of electrodes, capacitance and/or inductance between any two of the plurality of electrodes, and/or any change thereof. 
     Determining  1004  the issue based on the monitor data may comprise determining  1004 A one or more moisture pattern types based on the monitor data, wherein the issue is based on the one or more moisture pattern types. Determining  1004 A one or more moisture pattern types based on the monitor data may comprise identifying a moisture pattern type based on parameter data of the monitor data. A moisture pattern type optionally comprises a moisture pattern direction. 
     In the method  1000 , determining  1004  the issue based on the monitor data may comprise generating  1004 B a set of representative features of the moisture pattern type based on previously determined moisture pattern types; determining  1004 C whether one or more features of the determined moisture pattern type satisfy a first issue criterion, where in the first issue criterion is based on the set of representative features; and determining  1004 D the issue as a first issue in accordance with the one or more features of the determined moisture pattern type satisfying the first issue criterion. 
     Determining  1004  the issue based on the monitor data optionally comprises determining  1004 E a number N1 of occurrences of the determined moisture pattern type over a time period, e.g. of N base plate wear time cycles; determining  1004 F whether the number of occurrences satisfies a second issue criterion; and determining  1004 G the issue as a second issue in accordance with the number of occurrences satisfying the second issue criterion. 
     In method  1000 , identifying  1006  the set of candidate actions from a plurality of possible actions based on the determined issue optionally comprises identifying  1006 A the set of candidate actions from a plurality of possible actions based on the determined issue and on user data. The user data may comprise one or more of ostomate type, skin irregularity parameter, stoma position parameter, health data, nutritional data, medicine intake data, activity data, gender data, and age data. 
     In method  1000 , displaying  1010  the set of digital content on the display optionally comprises displaying  1010 A the set of digital content on the display in a first application, wherein the first application is an ostomy user application installed on the accessory device. Displaying  1010  the set of digital content on the display may comprise displaying  1010 B on the display a notification indicative of the set of digital content. The set of digital content may comprise media content. 
       FIG. 17  is a block diagram illustrating an exemplary accessory device  8  according to the present disclosure. The accessory device  8  forms part of an ostomy system and is optionally configured to performing the method as disclosed herein. The accessory device  8  comprises a memory  501 ; a processor  502  coupled to the memory  501 ; and an interface  503  coupled to the processor  502 . The interface  503  comprises a display  504 . Peripheral devices  501 ,  503  can be operatively and communicably coupled to the processor  502  via a bus for communicating data. The processor  502  can be a central processing unit (CPU), but other suitable microprocessors are also contemplated. 
     The interface  503  is configured to communicate with one or more devices of the ostomy system. The one or more devices comprises a monitor device and/or an ostomy appliance configured to be placed on a skin surface of a user or on any additional seals. The interface  503  is configured to obtain monitor data from the one or more devices, such as to receive or retrieve the monitor data from the one or more devices. The monitor data may be indicative of a presence of fluid at a proximal side of the first adhesive layer of the ostomy appliance, such as a presence of fluid of a proximal side of the first adhesive layer of a base plate and/or a sensor assembly part of the ostomy appliance. 
     The processor  502  is configured to determine an issue based on the monitor data, wherein the issue is related to the ostomy appliance; identify a set of candidate actions from a plurality of possible actions based on the determined issue; select a set of digital content based on the set of candidate actions; and wherein the interface  503  is configured to display the set of digital content on the display  504 . 
     In one or more exemplary accessory devices, to determine an issue comprises to determine a moisture pattern type and wherein the issue is based on the moisture pattern type. To determine of a moisture pattern type may comprise selecting a moisture pattern type from a set of predefined moisture pattern types. The set of predefined moisture pattern types may comprise a number K of moisture pattern types, such as at least three moisture pattern types, at least four moisture pattern types, at least five moisture pattern types. The number K of moisture pattern types may be in the range from four to twenty. 
     The processor  502  is optionally configured to determine one or more moisture pattern types based on the monitor data by identifying a moisture pattern type based on parameter data, such as for a corresponding sensing zone 
     The memory  501  may be configured to store the monitor data or at least parts thereof. The processor  502  may be configured to instruct the interface  503  to display a user interface including an issue user interface element representative of the issue on the display  504 . The processor  502  may be configured to instruct the interface  503  to display a user interface including a number of candidate action user interface elements on the display  504 , each candidate action user interface element corresponding to a candidate action of the set of candidate actions. The processor  502  may be configured to instruct the interface  503  to display the set of digital content on the display  504 , e.g. in accordance with detection of a user selection of the corresponding candidate action user interface element. 
     The processor  502  may be configured to determine an issue based on the monitor data obtained. The issue is indicative of the dynamic internal state of the ostomy appliance (for example early presence of fluid that is not visible to the user when the ostomy appliance is worn), related to the leakage of output (e.g. faecal material), such as severity, imminence, timing of leakage at a proximal side (or proximal surface) of the ostomy appliance. Presence of fluid on the proximal side (or proximal surface) of the first adhesive layer may affect the adhesive performance of the ostomy appliance. 
       FIG. 18  illustrates an exemplary user interface  600  of an accessory device according to the present disclosure. In the illustrated example, the accessory device has determined the issue as an issue of generally smaller wear time than expected for base plates and/or sensor assembly parts based on the monitor data, i.e. the monitor data are indicative of a wear time or average wear time less than an expected wear time. The user interface  600  comprises a first user interface screen  602  comprising an issue user interface element  604  in the form of a text field representative of the issue on the display  504 . The accessory device/processor identifies, based on the determined issue, a set of candidate actions. The user interface  600  comprises, e.g. as part of the first user interface screen  602  or as part of a second user interface screen  606  as illustrated, a number of candidate action user interface elements  610 ,  612 ,  614 ,  616 , each candidate action user interface element  610 ,  612 ,  614 ,  616  corresponding to a candidate action of the set of candidate actions. The candidate action related to first candidate action user interface element  610  is improved preparation, e.g. cutting, of the base plate and/or the sensor assembly part. The candidate action related to second candidate action user interface element  612  is improved preparation, e.g. cleaning and drying, of the skin surface. The candidate action related to third candidate action user interface element  614  is improved application, e.g. positioning, of the base plate and/or the sensor assembly part. The candidate action related to fourth candidate action user interface element  616  is change of ostomy appliance type. The accessory device/processor is configured to select a set of digital content based on the set of candidate actions and display the set of digital content on the display, e.g. as part of user interface  600  in a user interface screen upon detection of user selection of a candidate action user interface element  610 ,  612 ,  614 ,  616 . In  FIG. 18 , the user interface  600  comprises a third user interface screen  618  with text  620  and a video  622  as digital content on the display  504 . The third user interface screen  618  with the set of digital content  620 ,  622  is displayed upon detection of user selection of first candidate action user interface element  610  relating to improved cutting of the base plate and/or the sensor assembly part. 
     The use of the terms “first”, “second”, “third”, “fourth”, “fifth”, “sixth”, “primary”, “secondary”, “tertiary” etc. does not imply any particular order but are included to identify individual elements. Moreover, the use of the terms “first”, “second”, “third”, “fourth”, “fifth”, “sixth”, “primary”, “secondary”, “tertiary” etc. does not denote any order or importance, but rather the terms “first”, “second”, “third”, “fourth”, “fifth”, “sixth”, “primary”, “secondary”, “tertiary” etc. are used to distinguish one element from another. Note that the words “first”, “second”, “third”, “fourth”, “fifth”, “sixth”, “primary”, “secondary”, “tertiary” etc. are used here and elsewhere for labelling purposes only and are not intended to denote any specific spatial or temporal ordering. Furthermore, the labelling of a first element does not imply the presence of a second element and vice versa. 
     Although particular features have been shown and described, it will be understood that they are not intended to limit the claimed invention, and it will be made obvious to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the claimed invention. The specification and drawings are, accordingly to be regarded in an illustrative rather than restrictive sense. The claimed invention is intended to cover all alternatives, modifications, and equivalents. 
     Embodiments of the present disclosure are set out in the following items: 
     1. A method, performed in an accessory device, wherein the accessory device comprises an interface configured to communicate with one or more devices of an ostomy system, the interface comprising a display, wherein the ostomy system comprises a monitor device and/or an ostomy appliance, the ostomy appliance being configured to be placed on a skin surface of a user, wherein the ostomy appliance comprises a sensor assembly part, the method comprising:
         obtaining monitor data from the monitor device, wherein the monitor data is indicative of presence of fluid at a proximal side of a first adhesive layer of the sensor assembly part towards the skin surface;   determining an issue based on the monitor data, wherein the issue is related to the ostomy appliance;   identifying, based on the determined issue, a set of candidate actions to the issue from a plurality of possible actions;   selecting a set of digital content based on the set of candidate actions; and   displaying the set of digital content on the display.
 
2. Method according to item 1, wherein the sensor assembly part comprises a plurality of electrodes configured to detect presence of fluid on the proximal side in a primary sensing zone and a secondary sensing zone, the plurality of electrodes including a first leakage electrode, a second leakage electrode, and a third leakage electrode, and wherein obtaining the monitor data comprises obtaining monitor data indicative of detection of fluid on the proximal side in the primary sensing zone and/or the secondary sensing zone.
 
3. Method according to any of the previous items, wherein the monitor data comprises ostomy data and/or parameter data.
 
4. Method according to item 3, wherein the ostomy data and/or parameter data is indicative of resistance between any two of the plurality of electrodes, capacitance and/or inductance between any two of the plurality of electrodes, and/or any change thereof.
 
5. Method according to any of the previous items, wherein determining the issue based on the monitor data comprises determining one or more moisture pattern types based on the monitor data.
 
6. Method according to item 5, wherein determining one or more moisture pattern types based on the monitor data comprises identifying a moisture pattern type based on parameter data.
 
7. Method according to any of items 5-6, wherein a moisture pattern type comprises a moisture pattern direction.
 
8. Method according to any of items 5-7, wherein determining the issue based on the monitor data comprises:
   generating a set of representative features of the moisture pattern type based on previously determined moisture pattern types;   determining whether one or more features of the determined moisture pattern type satisfy a first issue criterion, where in the first issue criterion is based on the set of representative features; and   determining the issue as a first issue in accordance with the one or more features of the determined moisture pattern type satisfying the first issue criterion.
 
9. Method according to any of items 5-8 as dependent on item 8, wherein determining the issue based on the monitor data comprises:
   determining a number of occurrences of the determined moisture pattern type over a time period;   determining whether the number of occurrences satisfies a second issue criterion; and   determining the issue as of a second type in accordance with the number of occurrences satisfying the second issue criterion.
 
10. Method according to any of the previous items, wherein identifying the set of candidate actions from a plurality of possible actions based on the determined issue comprises identifying the set of candidate actions from a plurality of possible actions based on the determined issue and on user data; wherein the user data comprises one or more of ostomate type, skin irregularity parameter, stoma position parameter, health data, nutritional data, medicine intake data, activity data, gender data, and age data.
 
11. Method according to any of the previous items, wherein possible actions comprise an action regarding one or more of: skin preparation, sensor assembly part preparation, sensor assembly part placement, sensor assembly part application, ostomy appliance type, sensor assembly part type, ostomy appliance type, and user guidance.
 
12. Method according to any of the previous items, wherein displaying the set of digital content on the display comprises displaying the set of digital content on the display in a first application, wherein the first application is an ostomy user application installed on the accessory device.
 
13. Method according to any of the previous items, wherein displaying the set of digital content on the display comprises displaying on the display a notification indicative of the set of digital content.
 
14. Method according to any of the previous items, wherein the set of digital content comprises media content.
 
15. An accessory device, wherein the accessory device forms part of an ostomy system, the accessory device comprising:
   a memory;   a processor operatively connected to the memory; and   an interface operatively connected to the processor and configured to communicate with one or more devices of the ostomy system, the one or more devices comprising a monitor device and/or an ostomy appliance configured to be placed on a skin surface of a user, the ostomy appliance comprising a sensor assembly part, wherein the interface is configured to obtain monitor data from the one or more devices, and
 
wherein the interface comprises a display,
 
wherein the processor is configured to
   determine an issue based on the monitor data, wherein the issue is related to the ostomy appliance;   identify a set of candidate actions from a plurality of possible actions based on the determined issue;   select a set of digital content based on the set of candidate actions; and
 
wherein the interface is configured to display the set of digital content on the display.
       

     LIST OF REFERENCES 
     
         
           1  ostomy system 
           2  ostomy appliance 
           4  base plate 
           6  monitor device 
           8  accessory device 
           10  server device 
           12  network 
           14  coupling member 
           16  coupling ring 
           18 ,  18 A,  18 B,  18 C,  18 D stomal opening 
           20  docking station 
           22  first connector 
           24  user interface 
           100  monitor device housing 
           101  processor 
           102  first interface 
           104  second interface 
           106  memory 
           108  ground terminal of monitor device 
           110  first terminal of monitor device 
           112  second terminal of monitor device 
           114  third terminal of monitor device 
           116  fourth terminal of monitor device 
           118  fifth terminal of monitor device 
           120  coupling part 
           121  power unit 
           122  antenna 
           124  wireless transceiver 
           126  loudspeaker 
           128  haptic feedback element 
           140  sensor unit 
           200 ,  201  first adhesive layer 
           200 A distal surface of first adhesive layer 
           200 B proximal surface of first adhesive layer 
           202  second adhesive layer 
           202 A distal surface of second adhesive layer 
           202 B proximal surface of second adhesive layer 
           204  electrode assembly 
           204 A distal surface of electrode assembly 
           204 B proximal surface of electrode assembly 
           206  release liner 
           206 A distal surface of the release liner 
           206 B proximal surface of the release liner 
           208  top layer 
           208 A distal surface of the top layer 
           208 B proximal surface of the top layer 
           209  coupling ring 
           210  coupling part of first connector 
           211  first connector 
           212  terminals of first connector 
           213  first intermediate element 
           213 A distal surface of first intermediate element 
           213 B proximal surface of first intermediate element 
           214  support layer of electrode assembly 
           214 A distal surface of support layer 
           214 B proximal surface of support layer 
           216  electrodes of electrode assembly 
           217  connection parts of electrodes 
           218 ,  219  masking element 
           218 A distal surface of masking element 
           218 B proximal surface of masking element 
           220 ,  220 A,  220 B electrode configuration 
           222  ground electrode, first leakage electrode 
           222 A ground connection part 
           222 B ground sensing part, sensing part of first leakage electrode 
           222 C ground connector part 
           222 D primary sensing part 
           222 E tertiary sensing part 
           222 F secondary sensing part 
           224  first electrode 
           224 A first connection part 
           224 B first sensing part 
           224 C first conductor part 
           226  second electrode 
           226 A second connection part 
           226 B second sensing part 
           226 C second conductor part 
           228  third electrode 
           228 A third connection part 
           228 B third sensing part 
           228 C third conductor part 
           230  fourth electrode, second leakage electrode 
           230 A fourth connection part 
           230 B fourth sensing part, sensing part of second leakage electrode 
           230 D primary sensing part 
           230 E secondary sensing part 
           232  fifth electrode, third leakage electrode 
           232 A fifth connection part 
           232 B fifth sensing part, sensing part of third leakage electrode 
           232 D secondary sensing part 
           232 E tertiary sensing part 
           234  first electrode part of the ground electrode 
           236  second electrode part of the ground electrode 
           238  third electrode part of the ground electrode 
           240  fourth electrode part of the ground electrode 
           242  ground terminal opening 
           244  first terminal opening 
           246  second terminal opening 
           248  third terminal opening 
           250  fourth terminal opening 
           252  fifth terminal opening 
           254  primary sensor point openings of masking element 
           254 A primary sensor point opening for the ground electrode (first leakage electrode) 
           254 B primary sensor point opening for the fourth electrode (second leakage electrode) 
           256  secondary sensor point openings of masking element 
           256 A secondary sensor point opening for the fifth electrode (third leakage electrode) 
           256 B secondary sensor point opening for the fourth electrode (second leakage electrode) 
           258  tertiary sensor point openings of masking element 
           258 B tertiary sensor point opening for the fifth electrode (third leakage electrode) 
           258 A tertiary sensor point opening for the ground electrode (first leakage electrode) 
           260  primary sensor point openings of first adhesive layer 
           260 A primary sensor point opening for the ground electrode (first leakage electrode) 
           260 B primary sensor point opening for the fourth electrode (second leakage electrode) 
           262  secondary sensor point openings of first adhesive layer 
           262 A secondary sensor point opening for the fifth electrode (third leakage electrode) 
           262 B secondary sensor point opening for the fourth electrode (second leakage electrode) 
           264  tertiary sensor point openings of first adhesive layer 
           264 A tertiary sensor point opening for the fifth electrode (third leakage electrode) 
           264 B tertiary sensor point opening for the ground electrode (first leakage electrode) 
           282  ground terminal element 
           282 A ground terminal 
           284  first terminal element 
           284 A first terminal 
           286  second terminal element 
           286 A second terminal 
           288  third terminal element 
           288 A third terminal 
           290  fourth terminal element 
           290 A fourth terminal 
           292  fifth terminal element 
           292 A fifth terminal 
           400  primary sensing zone 
           402  secondary sensing zone 
           404  tertiary sensing zone 
           406  first direction/zero direction 
           408  second direction 
           410  third direction 
           412  fourth leakage electrode 
           414  fifth leakage electrode 
           416  quaternary sensing zone 
           418  fourth direction 
           501  memory 
           502  processor 
           503  interface 
           504  display 
           600  user interface 
           602  first user interface screen 
           604  issue user interface element 
           606  second user interface screen 
           610  first candidate action user interface element 
           612  second candidate action user interface element 
           614  third candidate action user interface element 
           616  fourth candidate action user interface element 
           618  third user interface screen 
           620  text 
           622  video 
           700  sensor assembly part 
           1000  method 
           1002  obtaining monitor data from the monitor device 
           1004  determining an issue based on the monitor data 
           1004 A determining one or more moisture pattern types based on the monitor data 
           1004 B generating a set of representative features of the moisture pattern type based on previously determined moisture pattern types 
           1004 C determining whether one or more features of the determined moisture pattern type satisfy a first issue criterion 
           1004 D determining the issue as a first issue in accordance with the one or more features of the determined moisture pattern type satisfying the first issue criterion 
           1004 E determining a number of occurrences of the determined moisture pattern type over a time period 
           1004 F determining whether the number of occurrences satisfies a second issue criterion 
           1004 G determining the issue as a second issue in accordance with the number of occurrences satisfying the second issue criterion 
           1006  identifying, based on the determined issue, a set of candidate actions to the issue from a plurality of possible actions 
           1006 A identifying the set of candidate actions from a plurality of possible actions based on the determined issue and on user data 
           1008  selecting a set of digital content based on the set of candidate actions 
           1010  displaying the set of digital content on the display 
           1010 A displaying the set of digital content on the display in a first application, wherein the first application is an ostomy user application installed on the accessory device 
           1010 B displaying on the display a notification indicative of the set of digital content 
         R 1  first radial distance 
         RG 1  first ground distance 
         R 2  second radial distance 
         RG 2  second ground distance 
         R 3  third radial distance 
         RG 3  third ground distance 
         RL leakage radius 
         V 1  primary angle 
         V 2  secondary angle 
         V 3  tertiary angle 
         V 4  quaternary angle