Sensor device, notification method, pouch, and notification system

Abstract

To provide a sensor device that allows leakage from a pouch to be detected more accurately.SOLUTION: A smell sensor (41) detects a smell leaking from a pouch (3) mounted on a stoma (21) of a user (2). A radio communication interface (42) notifies the user (2) that a smell has been detected, through a notification device (5).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sensor device, a notification method, a pouch, and a notification system. [Background technology]

[0002] For ostomates who use pouches on a daily basis, leakage from the pouch is a major concern. Ostomates wear their pouches all the time and go about their daily lives just like the people around them. For this reason, many ostomates have a strong desire to avoid causing trouble to those around them by leaking the smell of stool or gas (farts) from the pouch.

[0003] Conventional pouches have various features to prevent odor leakage. For example, they use adhesive to strongly adhere the base plate to the skin, or they put deodorants inside the pouch, and so on, in an attempt to minimize odor leakage. However, there is no guarantee that odor leakage can be completely prevented. And because there is no such guarantee, many ostomates are forced to use pouches while still worrying that odor leakage will occur someday.

[0004] In such a situation, a conventional technology for detecting leakage of excrement contained in a pouch and warning a user has been proposed in Patent Document 1. Patent Document 1 discloses a method for detecting the internal pressure of the pouch by opening a hole in the pouch, connecting a small chamber having an opening around the hole, and measuring the air pressure in the small chamber with an air pressure-electricity converter that converts the air pressure in the small chamber into an electrical signal. Patent Document 1 also discloses an alarm device in which this method is used. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Application No. 2020-537923 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the above-mentioned conventional method cannot detect the pressure rise unless the pressure inside the pouch is sufficiently high. Therefore, if the pressure rise is insufficient and odor (gas = fart) leaks from the gap between the base plate and the skin, the pressure rise cannot be detected, and the leakage detection fails. Thus, the conventional method has a problem of low accuracy in detecting leakage from the pouch.

[0007] One aspect of the present invention has been made in consideration of the above problems, and an object of the present invention is to realize a sensor device that can detect leakage from a pouch with higher accuracy. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, a sensor device according to one embodiment of the present invention includes an odor sensor that detects odors leaking from a pouch attached to a user's stoma, and a notification unit that notifies the user that the odor has been detected. Effect of the Invention

[0009] According to one aspect of the present invention, a sensor device capable of detecting leakage from a pouch with higher accuracy can be realized. [Brief description of the drawings]

[0010] [Figure 1] 1 is a diagram showing a configuration of a notification system according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a diagram showing the configuration of a pouch according to one embodiment of the present invention. [Diagram 3] 1 is a block diagram showing a configuration of a sensor device according to an embodiment of the present invention; [Figure 4] 1 is a block diagram showing a configuration of a notification device according to an embodiment of the present invention; [Diagram 5]FIG. 13 shows a pouch housing a sensor device in the pocket. [Figure 6] 4 is a sequence diagram showing the flow of a notification method executed by a notification system according to an embodiment of the present invention. FIG. [Figure 7] FIG. 13 is a diagram showing an example of a message for notifying a user that an odor leaking from a pouch has been detected. [Figure 8] FIG. 13 shows a pouch secured by a belt with a sensor device attached to a hook. [Figure 9] FIG. 1 is a diagram showing a configuration of a sensor device equipped with a suction unit. [Figure 10] FIG. 1 shows a pouch to which a sensor device is attached via a hook-and-loop fastener. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] (Notification System 1 Configuration) FIG. 1 is a diagram showing the configuration of a notification system 1 according to one embodiment of the present invention. In this embodiment, a user 2 who is an ostomate uses the notification system 1. A stoma 21 (artificial anus) is formed in the abdomen of the user 2. Since the user 2 has lost an anus, he or she must defecate through the stoma 21. Unlike the anus, the stoma 21 does not have a sphincter muscle, so the user 2 cannot consciously control the stoma 21 to release or hold in feces. Therefore, the user 2 uses a pouch 3 attached to the stoma 21 to receive feces discharged from the stoma 21 in the pouch 3 regardless of the user's will. The pouch 3 is also called a stoma appliance.

[0012] If the user 2 can wear the pouch 3 correctly, the feces and gas (fart) discharged from the stoma 21 can be properly received in the storage bag 31 of the pouch 3. Therefore, there is no risk of the feces and gas discharged from the stoma 21 leaking out of the pouch 3. However, if the user 2 is not yet accustomed to wearing the pouch 3, there is a risk that the user 2 will finish wearing the pouch 3 with a gap between the pouch 3 and the skin of the user 2. Alternatively, even if the user 2 can wear the pouch 3 correctly, if a long time has passed, a new gap may be generated between the pouch 3 and the skin of the user 2 due to the movement or sweat of the user 2. In either case, the odor in the pouch 3 will leak from the gap, which causes stress to the user 2. Furthermore, the user 2 must be aware that a situation in which an odor may leak from the pouch 3 may occur, and must therefore live his or her daily life while worrying about the odor leaking, which may be a psychological burden for the user 2.

[0013] Therefore, the user 2 uses the notification system 1 according to this embodiment so that he or she can feel at ease in everyday life while wearing the pouch 3. As shown in FIG. 1, the notification system 1 is composed of a sensor device 4 and a notification device 5. The sensor device 4 is a device that detects odor leakage from the pouch 3. If the sensor device 4 detects odor leakage, the notification device 5 notifies the user 2 of the odor leakage from the pouch 3. The functions and operations of the sensor device 4 and the notification device 5 will be described in detail later.

[0014] (Stroma 21 Configuration) FIG. 2 is a diagram showing the configuration of a pouch 3 according to an embodiment of the present invention. As shown in this figure, the pouch 3 includes a storage bag 31 in which an insertion hole 32 is formed, a base plate 33, and a pocket 34. The storage bag 31 is a bag in which stool and gas excreted from the stoma 21 are stored. The insertion hole 32 is a hole into which the stoma 21 is inserted when the pouch 3 is attached to the user 2. The base plate 33 is arranged in a circular shape so as to surround the periphery of the insertion hole 32, and an adhesive is applied to its surface. When the user 2 attaches the pouch 3, the user 2 inserts the stoma 21 into the insertion hole 32 and firmly presses the base plate 33 against the skin of the user 2's abdomen. As a result, the base plate 33 is fixed to the covering of the user 2 via the adhesive around the stoma 21. As a result, the skin around the stoma 21 is sealed by the base plate 33.

[0015] The pocket 34 is formed below the face plate 33 of the storage bag 31. The pocket 34 serves as an attachment portion for attaching the sensor device 4 to the pouch 3, which will be described in detail later.

[0016] (Configuration of sensor device 4) 3 is a block diagram showing the configuration of a sensor device 4 according to an embodiment of the present invention. As shown in this figure, the sensor device 4 includes an odor sensor 41 and a wireless communication interface 42 (transmitter, notification unit). The odor sensor 41 detects odor leaking from the pouch 3 attached to the stoma 21 of the user 2. More specifically, the odor sensor 41 is disposed near the pouch 3, and when a gap occurs between the face plate 33 of the pouch 3 and the skin of the user 2, the odor sensor 41 detects odor (gas) leaking from the pouch 3 through the gap. When the odor sensor 41 detects an odor, it outputs a detection signal to the wireless communication interface 42.

[0017] The wireless communication interface 42 is a communication interface for wireless communication with the notification device 5. In this embodiment, the wireless communication interface 42 is, for example, a Bluetooth (registered trademark) interface. In this case, the wireless communication interface 42 transmits the detection signal input from the odor sensor 41 to the notification device 5 by Bluetooth communication.

[0018] (Configuration of notification device 5) Fig. 4 is a block diagram showing the configuration of a notification device 5 according to one embodiment of the present invention. As shown in this figure, the notification device 5 includes a processor 51, a memory 52, a touch panel 53, a wireless communication interface 54 (receiving unit), and a bus 55. The processor 51, the memory 52, the touch panel 53, and the wireless communication interface 54 are connected to each other via the bus 55. Devices that can be used as the notification device 5 include, for example, various portable terminal devices such as a smartphone or a tablet PC (Personal Computer).

[0019] A notification program is stored in the memory 52. ​​The processor 51 executes each process included in the notification method described below according to instructions included in the notification program stored in the memory 52. ​​The processor 51 is, for example, a CPU (Central Processing Unit). The memory 52 is, for example, a flash memory. The touch panel 53 is a panel in which a display panel functioning as an output device and a touch sensor functioning as an input device are integrated. As will be described in detail later, the notification device 5 displays a message on the touch panel 53 to notify the user 2 of odor leakage from the pouch 3. In other words, the notification device 5 is an example of a notification device used to notify the user 2 of odor leakage.

[0020] The wireless communication interface 54 is an interface for wireless communication with other devices. The wireless communication interface 54 may include an interface for wireless communication with other devices without a network, such as a Bluetooth (registered trademark) interface. The wireless communication interface 54 may also include an interface for wireless communication with other devices via a LAN (Local Area Network), such as a Wi-Fi (registered trademark) interface. The wireless communication interface 54 may also include an interface for wireless communication with other devices via a mobile communication network, such as a 5G interface. In this embodiment, the wireless communication interface 54 used for communication with the sensor device 4 uses a Bluetooth interface.

[0021] (Example of arrangement of sensor device 4) FIG. 5 is a diagram showing the pouch 3 storing the sensor device 4 in the pocket 34. This figure shows the pouch 3 attached to the stoma 21 of the user 2 as viewed from the side of the user 2's body. The right side in FIG. 5 corresponds to the abdomen of the user 2. As shown in this figure, the pouch 3 is attached to the user 2 with the stoma 21 inserted into the insertion hole 32 and the base plate 33 in close contact with the skin of the abdomen of the user 2. The sensor device 4 is stored in the pocket 34 formed in the lower part of the base plate 33. The user 2 can place the sensor device 4 in the lower part of the base plate 33 by putting the sensor device 4 in the pocket 34 and then wearing the pouch 3. Alternatively, the user 2 may put the sensor device 4 in the pocket 34 after wearing the pouch 3.

[0022] (Example of notification method) 6 is a sequence diagram showing the flow of a notification method executed by the notification system 1 according to one embodiment of the present invention. The user 2 wears the pouch 3 containing the sensor device 4 in his pocket 34. The user 2 also carries a notification device 5. Bluetooth pairing has been established in advance between the sensor device 4 and the notification device 5. In addition, the Bluetooth functions of both the sensor device 4 and the notification device 5 are turned on.

[0023] In this situation, suppose that a gap occurs between the base plate 33 and the skin of the user 2 for some reason, causing an odor to leak from the pouch 3. The notification system 1 detects this odor leakage and notifies the user 2 by executing the notification method shown in FIG. 6. First, in step S1, the odor sensor 41 of the sensor device 4 detects the odor leaking from the gap between the base plate 33 and the skin of the user 2. When the sensor device 4 detects an odor, it outputs a detection signal to the wireless communication interface 42. In step S2, the wireless communication interface 42 of the sensor device 4 transmits the detection signal to the notification device 5 by Bluetooth communication. In step S11, the wireless communication interface 54 of the notification device 5 receives the detection signal transmitted from the sensor device 4. The wireless communication interface 54 notifies the processor 51 that it has received the detection signal. In step S12, the processor 51 notifies the user 2 that it has detected odor leakage from the pouch 3.

[0024] 6, as a result of the wireless communication interface 42 sending a detection signal to the notification device 5, the user 2 is notified that odor leakage from the pouch 3 has been detected. In this sense, it can be said that the wireless communication interface 42 serves as a notification unit that notifies the user 2 through the notification device 5 that odor leakage from the pouch 3 has been detected.

[0025] Although the configuration in which the sensor device 4 determines whether an odor has leaked from the pouch 3 has been described here, the present invention is not limited to this. For example, a configuration in which the notification device 5 determines whether an odor has leaked from the pouch 3 may be adopted. In this case, the sensor device 4 transmits the output signal of the odor sensor 41 itself as a detection signal to the notification device 5, rather than a detection signal indicating whether an odor has leaked and generated based on the output signal of the odor sensor 41. The notification device 5 determines whether an odor has leaked based on the output signal of the odor sensor 41, and notifies the user 2 of that fact if an odor has leaked.

[0026] (Example of a notification message) FIG. 7 is a diagram showing an example of a message for notifying user 2 that an odor leaking from pouch 3 has been detected. Processor 51 notifies user 2 that an odor leaking from pouch 3 has been detected by displaying, for example, a message 71 as shown in FIG. 7 on touch panel 53. Message 71 includes text explaining that an odor leaking from pouch 3 has been detected. User 2 recognizes message 71 visually and understands that an odor is leaking from pouch 3. User 2 then takes measures to eliminate the odor leakage.

[0027] (Major effects) The notification system 1 of this embodiment notifies the user 2 of odor leakage when it detects odor leaking from the pouch 3 worn by the user 2. This makes it possible to detect leakage from the pouch even when there is a small gap between the base plate 33 and the skin of the user 2, causing a slight amount of odor leakage. Therefore, leakage from the pouch 3 can be detected with higher accuracy.

[0028] Furthermore, the notification system 1 notifies the user 2 of the odor leakage while the contents (feces) of the pouch 3 are still not leaking, thereby allowing the user 2 to take measures to deal with the odor leakage. This eliminates the need for the user 2 to remove the contents that have leaked from the pouch 3 or wash the skin to which the contents have adhered, greatly simplifying the effort required for the measures.

[0029] (Preferable placement position of sensor device 4) The sensor device 4 is preferably disposed as close as possible to the outer peripheral surface of the base plate 33. For example, it may be disposed at any position around the base plate 33. This shortens the distance between the gap between the base plate 33 and the skin of the user 2 and the odor sensor 41, so that the odor leaking from the gap can be exposed to the odor sensor 41 in a short time. As a result, a higher concentration of gas can be exposed to the odor sensor 41, so that the accuracy of odor detection can be improved. In particular, the sensor device 4 is preferably disposed within a distance of 10 cm from the outer peripheral surface of the base plate 33. This prevents the odor sensor 41 from reacting to surrounding odors other than the gas leaking from the pouch 3, so that erroneous detection of leakage can be suppressed.

[0030] (Hook 81) 8 is a diagram showing a pouch 3A fixed by a belt 80 with a sensor device 4 attached to a hook 81. In the example shown in this figure, a user 2 is wearing the pouch 3A. The pouch 3A includes a storage bag 31 in which an insertion hole 32 is formed, and a face plate 33, but does not include a pocket 34. Therefore, the user 2 cannot attach the sensor device 4 to the pouch 3A.

[0031] The user 2 further wears a belt 80 to position the pouch 3A on the abdomen of the user 2. The belt 80 is wrapped around the abdomen of the user so as to cover the pouch 3A. The belt 80 includes a hook 81. The hook 81 is used to hook and attach the sensor device 4 to the belt 80. The hook 81 is disposed near the base plate 33 when the user 2 wears the belt 80. Therefore, when the user 2 attaches the sensor device 4 to the hook 81 of the belt 80, the sensor device 4 is also disposed near the base plate 33.

[0032] In the example of Fig. 8, the sensor device 4 can be disposed near the base plate 33 of a pouch 3A without a pocket 34. Therefore, even a user 2 who uses a conventional general-purpose pouch 3A can utilize the notification system 1. Note that even when the user 2 wears a pouch 3 having a pocket 34, the user 2 may further wear a belt 80 with a hook 81 and hook the sensor device 4 onto the belt 80 using the hook 81. Also, instead of hooking the hook 81 fixed to the belt 80 side onto the sensor device 4, the hook 81 fixed to the sensor device 4 side may be hooked onto the belt 80.

[0033] (Sensor device 4A) FIG. 9 is a diagram showing the configuration of a sensor device 4A equipped with a suction unit 43. In the example shown in this figure, a user 2 is wearing a pouch 3A. For ease of explanation, the storage bag 31 is not shown in FIG. 9. The user 2 attaches the sensor device 4A to the pouch 3A by using a hose 90. The sensor device 4A includes an odor sensor 41, a wireless communication interface 42, and a suction unit 43. The suction unit 43 is a mechanism for sucking in gas. The suction unit 43 exposes the sucked gas to the odor sensor 41.

[0034] The hose 90 is a tube having a cavity inside, and has a plurality of suction holes 91 formed on its side. Both ends of the hose 90 are connected to the suction part 43 of the sensor device 4A. The sensor device 4A connected to the hose 90 is attached to the lower part of the face plate 33 by hanging the hose 90 on the outer periphery of the face plate 33.

[0035] The suction unit 43 of the sensor device 4A sucks in the inside of the hose 90, thereby sucking in the gas around the face plate 33 through the suction hole 91 of the hose 90. The odor sensor 41 detects odor leakage from the pouch 3 when the sucked in gas contains a certain concentration or more of gas that has leaked from the pouch 3.

[0036] In this example, the suction unit 43 can provide directionality to the suction direction of the gas by using the hose 90 to suck in the gas. Therefore, the gas leaking from the face plate 33 side can be efficiently sucked in. As a result, the accuracy of detecting odor leakage from the pouch can be further improved.

[0037] The hose 90 also functions as a hook for attaching the sensor device 4A to the pouch 3A, so there is no need for a separate part such as a hook for attaching the sensor device 4A.

[0038] (Attachment of sensor device 4 with hook-and-loop fastener 101) FIG. 10 is a diagram showing a pouch 3B to which a sensor device 4 is attached via a hook-and-loop fastener 101. This diagram shows the pouch 3B attached to the stoma 21 of the user 2 as viewed from the side of the user 2's body. The right side in FIG. 10 corresponds to the abdomen of the user 2. The pouch 3B shown in this diagram is basically configured in the same manner as the pouch 3 described above. However, the pouch 3B is different from the pouch 3 in that the back surface 35 of the storage bag 31, i.e., the back surface 35 that comes into contact with the skin of the user 2 when the pouch 3B is worn, is made of a nonwoven fabric. Since the back surface 35 of the pouch 3B is made of a nonwoven fabric that has a high affinity with the skin of the user 2, it is possible to reduce the discomfort felt by the skin of the user 2 while wearing the pouch 3B.

[0039] 10, the sensor device 4 is attached to the lower part of the face plate 33 on the back surface 35 of the pouch 3B via a hook-and-loop fastener 101. That is, the hook-and-loop fastener 101 serves as an attachment part for attaching the sensor device 4 to the pouch 3B. The user 2 can attach the sensor device 4 to the back surface 35 of the pouch 3B by attaching the hook-and-loop fastener 101 to the housing of the sensor device 4 and then firmly pressing the attachment surface of the hook-and-loop fastener 101 of the sensor device 4 against the back surface 35 of the pouch 3B.

[0040] 10, the sensor device 4 can be disposed near the base plate 33 of a pouch 3B that does not have a pocket 34. Therefore, even a user 2 who uses a conventional general-purpose pouch 3B can use the notification system 1.

[0041] The user 2 can also attach the sensor device 4 to the back surface 35 of the pouch 3B without directly attaching the hook-and-loop fastener 101 to the sensor device 4. Specifically, the user 2 attaches the hook-and-loop fastener 101 to the surface of a nonwoven fabric bag (not shown) made of nonwoven fabric, and further stores the sensor device 4 in the nonwoven fabric. Next, the user 2 attaches the nonwoven fabric bag to the back surface 35 of the pouch 3B by strongly pressing the attachment surface of the hook-and-loop fastener 101 of the nonwoven fabric bag in which the sensor device 4 is stored against the back surface 35 of the pouch 3B. As a result, the user 2 can attach the sensor device 4 stored in the nonwoven fabric bag to the back surface 35 of the pouch 3B.

[0042] In this example, since the sensor device 4 is stored in a nonwoven fabric bag, the sensor device 4 does not directly touch the skin of the user 2. This makes it possible to eliminate any discomfort that may be caused by the sensor device 4 touching the skin. Furthermore, since the sensor device 4 is stored in a nonwoven fabric bag, the nonwoven fabric bag touches the skin of the user 2. Since the nonwoven fabric bag is made of a nonwoven fabric that has a high affinity for the skin of the user 2, it is possible to reduce any discomfort felt by the skin of the user 2 during use of the sensor device 4.

[0043] (Notification mode) The notification of odor leakage to the user 2 is not limited to a notification that appeals to the user 2's vision as shown in FIG. 7, but may also be a notification that appeals to a sense other than vision (such as hearing or touch). For example, the processor 51 may notify the user 2 of odor leakage from the pouch 3 by vibrating the notification device 5 with a predetermined vibration pattern. In this example, even if the user 2 carries the notification device 5 in a bag or a pocket of his / her clothes, the user 2 can be made to quickly become aware of odor leakage from the pouch 3. This makes it possible to prevent the user 2 from overlooking the notification and being late in taking measures to eliminate odor leakage.

[0044] It is preferable that the notification of odor leakage to user 2 be in a manner that does not let those around user 2 know, specifically, a notification that appeals to user 2's visual or tactile sense. Notification by displaying message 71 or by vibration of notification device 5 prevents those around user 2 from knowing that odor has leaked from pouch 3. As a result, the user's privacy can be protected. Furthermore, user 2 can go to the bathroom to take measures to eliminate odor leakage without worrying about those around him.

[0045] (Detection of leakage of inclusions) When user 2 takes a specific body position such as supine or lateral position while sleeping or resting, the inclusions such as solid stool or fecal juice accumulated in pouch 3 may leak from pouch 3 before gas leaks. Even in such a case, sensor device 4 can detect the leakage of the inclusions from pouch 3 by detecting the odor emitted from the leaking inclusions with odor sensor 41. Therefore, notification system 1 can notify user 2 of the detection of the leakage even if the inclusions leak from pouch 3A first.

[0046] (Wearing training) The notification system 1 can also be used for training a user 2 who is accustomed to wearing the pouch 3 to wear the pouch 3. Specifically, the user 2 first wears the pouch 3 with the sensor device 4 in the pocket 34. After that, the user 2 carries the notification device 5 and spends time until a specified time has passed. If the specified time has passed without any notification of odor leakage from the notification device 5, the user 2 knows that the pouch 3 has been worn correctly.

[0047] On the other hand, if the user 2 receives a notification of odor leakage from the notification device 5 before the specified time has elapsed, the user understands that the pouch 3 was not properly attached. In this case, the user 2 starts over from the beginning of putting on the pouch 3. In this way, after putting on the pouch 3, the user 2 repeats putting on the pouch 3 until the specified time can pass without receiving a notification of odor leakage from the notification device 5. By undergoing this wearing training, the user 2 can learn how to wear the pouch 3 in a short period of time.

[0048] (Use of cloud servers) When the notification device 5 receives the detection signal from the sensor device 4, it may transmit the detection information of the odor leakage to the cloud server. For example, it transmits time information indicating the time when the odor leakage was detected to the cloud server. The cloud server adds the received time information to the history of the odor leakage detection information. The cloud server analyzes the history to predict the time when the next odor leakage is likely to occur in the pouch 3 worn by the user 2, and transmits time information indicating that time to the notification device 5. The notification device 5 notifies the user 2 of the time indicated by the notified time information, thereby allowing the user to know in advance the timing when the next odor leakage from the pouch 3 is likely to occur. This allows the user 2 to take preventive measures against odor leakage when that time approaches, allowing the user 2 to live their daily life with greater peace of mind.

[0049] [Additional Notes] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in the above-described embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0050] 1. Notification System 2. Users 3, 3A, 3B pouch 4, 4A Sensor Device 5 Notification device 15 Bus 21 Stoma 31 Storage bag 32 Insertion hole 33 face plate 34 Pockets 35 Back side 41 Sensors 42, 54 Wireless communication interface 43 Suction part 51 Processors 52 Memory 53 Touch Panel 71 Messages 80 Belt 81 Hook 90 Horse 91 Suction hole 101 Hook and loop fastener

Claims

1. an odor sensor that detects odors leaking from a pouch attached to a user's stoma; a notification unit that notifies the user that the odor has been detected, A belt is wound around the pouch to fix the pouch to the user, the belt has a hook that is disposed adjacent a face plate of the pouch when the belt is worn by the user; The odor sensor is attached to the hook of the belt, and is disposed near the base plate.

2. A pocket is formed in the storage bag of the pouch, The sensor device according to claim 1 , wherein the sensor device is stored in the pocket.

3. A detection step of detecting an odor leaking from a pouch attached to a user's stoma using an odor sensor; and a notification step of notifying the user that the odor has been detected, A belt is wound around the pouch to fix the pouch to the user, the belt has a hook that is disposed adjacent a face plate of the pouch when the belt is worn by the user; A notification method, characterized in that the odor sensor is attached to the hook of the belt and thereby positioned near the panel.

4. 3. A pouch to be attached to a user's stoma, the pouch comprising an attachment portion for attaching the sensor device according to claim 1 or 2 to the pouch.

5. A notification system comprising a sensor device and a notification device, A belt is wound around the pouch to be attached to the stoma of the user to fix the pouch to the user, the belt has a hook that is disposed adjacent a face plate of the pouch when the belt is worn by the user; The sensor device includes: an odor sensor that detects odor leaking from the pouch; a transmitter that transmits a detection signal of the odor sensor to the notification device, The hook is attached to the belt, and the hook is disposed adjacent to the base plate. The notification device includes: A receiving unit that receives the detection signal; A notification system comprising: a notification unit that, when the detection signal is received, notifies the user that the odor has been detected.

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