Notification system

Abstract

To provide a cardiac arrest notification system with few false alarms.SOLUTION: A notification system including a first sensor unit for detecting first biological information of a living body, a first determination unit for determining whether or not the living body is in a state of cardiac arrest on the basis of the first biological information, and a second determination unit for determining whether or not the first sensor unit is attached to the living body, the notification system issues first notification when the first determination unit determines that the living body is in the state of cardiac arrest and the second determination unit determines that the first sensor unit is attached to the living body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cardiac arrest notification system. [Background technology]

[0002] Emergency notification systems that detect and report the onset of cerebral infarction, myocardial infarction, etc. have been known for some time. For example, Patent Document 1 discloses an emergency notification system that includes a biological information detection means that is worn on the body of a subject who may have a heart disease or brain disease and detects the subject's biological information, a portable information terminal carried by the subject, a server connected via the Internet, and a notification means that, when an abnormality in the biological information is detected, reports the subject's biological information together with personal information of the subject to an emergency notification number located nearby within a certain range. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-061117 Summary of the Invention [Problem to be solved by the invention]

[0004] Emergency notification systems that detect and report the onset of cerebral infarction, myocardial infarction, etc., as in the above-mentioned Patent Document 1, are conventionally known. The present inventors have studied notification systems that detect and report cardiac arrest, the most serious condition, and have found that there are many cases in which notifications are issued even when the patient is not actually in cardiac arrest. The present invention has been made in light of the above-mentioned problems, and its purpose is to provide a cardiac arrest notification system that produces fewer false alarms. [Means for solving the problem]

[0005] The reporting system according to the embodiment that can solve the above problem is as follows. [1] A first sensor unit for detecting first biological information of a living body; a first determination unit that determines whether the living body is in a state of cardiac arrest based on the first biological information; a second determination unit that determines whether the first sensor unit is attached to the living body; A reporting system that issues a first report when the first discrimination unit determines that the living body is in a state of cardiac arrest and the second discrimination unit determines that the first sensor unit is attached to the living body.

[0006] The inventors' investigations have revealed that the main cause of false alarms in cardiac arrest notification systems is when the sensor unit is detached from the living body, making it impossible to acquire biological information, and the discrimination unit mistakenly determines this as a loss of biological information due to cardiac arrest. Therefore, as described above in [1], the second discrimination unit can reduce false alarms by determining whether the first sensor unit is attached to the living body.

[0007] The reporting system according to the embodiment is preferably any one of the following items [2] to [5]. [2] The notification system according to [1], wherein the first biological information includes heart rate, electrocardiogram waveform, pulse, pulse wave, heart sound, blood pressure, respiration, or a combination thereof. [3] Further, a second sensor unit that detects the attachment state of the first sensor unit to the living body, The second discrimination unit makes a discrimination based on information obtained from the second sensor unit, or information obtained from the first sensor unit and information obtained from the second sensor unit. [1] or [2] The reporting system described in [1] or [2]. [4] The first sensor unit detects second biological information of the living body, and the second biological information includes body movement, body temperature, body surface potential, blood oxygen saturation, water content, or a combination thereof; The reporting system according to any one of [1] to [3], wherein the second determination unit makes a determination based on the second biological information. [5] A trained model is provided, which uses as training data the first biological information, information on the state of attachment of the first sensor unit to the biological body, and information on the accuracy of the report; The notification system described in any one of [1] to [4], wherein the first biometric information accompanying the first notification and information on the state of attachment of the first sensor unit to the living body are input into the trained model, and a second notification is made if the trained model outputs that the notification is correct. [Effects of the Invention]

[0008] According to the present invention, a cardiac arrest notification system with fewer false alarms can be provided. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a reporting system according to the first embodiment. [Figure 2] FIG. 2 is a flowchart showing an example of the flow of operations of the reporting device of the reporting system according to the first embodiment. [Figure 3] FIG. 3 is a flowchart showing another example of the flow of operations of the reporting device of the reporting system according to the first embodiment. [Figure 4] FIG. 4 is a flowchart illustrating an example of the flow of operations of the management device of the reporting system according to the first embodiment. [Figure 5] FIG. 5 is a block diagram illustrating an example of the configuration of a reporting system according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described in more detail below based on the following embodiments. However, the present invention is not limited to the following embodiments, and can be implemented with appropriate modifications within the scope of the above and below-described purposes, and all such modifications are included within the technical scope of the present invention. In the drawings, component reference numerals may be omitted for convenience. In such cases, reference should be made to the specification or other drawings. The dimensions of various components in the drawings may differ from their actual dimensions, as priority is given to helping understand the features of the present invention.

[0011] The reporting system according to the embodiment includes a first sensor unit that detects first biological information of a living body, a first discrimination unit that discriminates whether the living body is in a state of cardiac arrest based on the first biological information, and a second discrimination unit that discriminates whether the first sensor unit is attached to the living body. The first discrimination unit issues a first report when the first discrimination unit determines that the living body is in a state of cardiac arrest and the second discrimination unit determines that the first sensor unit is attached to the living body. The inventors' research has revealed that the main cause of false reports in cardiac arrest reporting systems is when the sensor unit is detached from the living body, making it unable to acquire biological information, and the discrimination unit mistakenly discriminates this as a loss of biological information due to cardiac arrest. Therefore, by having the second discrimination unit discriminate whether the first sensor unit is attached to the living body as described above, false reports can be reduced.

[0012] The reporting system according to the first embodiment will be described in detail below with reference to Fig. 1. Fig. 1 is a block diagram showing an example of the configuration of the reporting system according to the first embodiment.

[0013] 1, a reporting system 91 according to the first embodiment preferably includes a reporting device 60 and a management device 70. The reporting device 60 and the management device 70 can be connected, for example, via a communication network 30. The reporting device 60 preferably sends the first report to the management device 70 wirelessly via the communication network 30.

[0014] As shown in FIG. 1, the reporting device 60 preferably includes a first sensor unit 1, a control unit 10, a first discrimination unit 11, a second discrimination unit 12, a memory unit 13, and a first reporting unit 14.

[0015] The notification device 60 is preferably configured so that at least a portion thereof is attached to a living body. Examples of the location where the notification device 60 is attached include the fingers, hands, arms, chest, abdomen, back, neck, ears, head, eyes, feet, legs, or torso of the living body. The notification device 60 may be a clothing-type device or an accessory-type device. The living body to which the notification device 60 is attached is preferably a human, but may also be, for example, livestock such as cows and pigs, or pets such as dogs and cats.

[0016] The first sensor unit 1 detects first biological information of a living organism. The first biological information is information that serves as the basis for determining whether or not the living organism is in a state of cardiac arrest. The first biological information preferably includes a heartbeat, an electrocardiogram waveform, a pulse, a pulse wave, a heart sound, blood pressure, respiration, or a combination thereof, and more preferably includes a heartbeat, an electrocardiogram waveform, a pulse, a pulse wave, or a combination thereof. This information is information about the pulsation of a living organism and is useful as information that serves as the basis for determining cardiac arrest. Pulse refers to the periodic contraction of internal organs in the body. The reporting device 60 may be attached to a living organism so that at least the first sensor unit 1 can detect the biological information. It is preferable that the first sensor unit 1 be capable of detecting the biological information while in contact with the living organism, but it may also be capable of detecting the biological information without being in contact with the living organism.

[0017] The first sensor unit 1 may perform the first biological information detection operation continuously or at regular intervals. For example, it is preferable to perform the first biological information detection operation every 0.5 to 20 seconds, and more preferably every 1.0 to 15 seconds. For example, if the first biological information cannot be detected for 0.5 seconds or more, cardiac arrest is likely. On the other hand, by setting the detection operation time to 20 seconds or less, the time from when cardiac arrest actually occurs to when cardiac arrest is determined can be shortened. Note that from the viewpoint of reducing power consumption and extending the operating time of the notification device 60, there may be a non-operating period during which the first biological information detection operation is not performed between the regular intervals. However, from the viewpoint of detecting cardiac arrest earlier, it is preferable to have no non-operating period.

[0018] It is preferable that the first sensor unit 1 further detects second biological information of the living organism. The second biological information is information that serves as a basis for determining whether or not the first sensor unit 1 is attached to the living organism. "The first sensor unit 1 being attached to the living organism" means that the first sensor unit 1 is attached to the living organism. The second biological information preferably includes body movement, body temperature, body surface potential, blood oxygen saturation, hydration, or a combination thereof, and more preferably includes body movement, body surface potential, blood oxygen saturation, hydration, or a combination thereof. Each of these is biological information that is easy to detect and acquire, and is useful as information that serves as a basis for determining whether or not the first sensor unit 1 is attached to the living organism.

[0019] The first sensor unit 1 may perform the second biological information detection operation continuously or at regular intervals. For example, it is preferable to perform the second biological information detection operation every 3 to 20 seconds, and more preferably every 5 to 15 seconds. For example, if the second biological information cannot be detected for 3 seconds or more, it is highly likely that the first sensor unit 1 is not attached to the living body. On the other hand, by setting the detection operation time to 20 seconds or less, the time required to determine whether the sensor unit 1 is attached to the living body can be shortened. Note that there may be a non-operating period during which the second biological information detection operation is not performed between the regular intervals, but there need not be any non-operating period.

[0020] When the second biological information is biological information that changes little or slowly, such as body temperature, body surface potential, blood oxygen saturation, or moisture content, the detection time for the second biological information is preferably shorter than or the same as the detection time for the first biological information, and more preferably shorter than the detection time for the first biological information. This reduces the power consumption until the first notification. On the other hand, when the second biological information is biological information that changes greatly and is transient, such as body movement, the detection time for the second biological information is preferably longer than the detection time for the first biological information.

[0021] The first sensor unit 1 may have one sensor or two or more sensors. The first sensor unit 1 preferably has an electrode, a capacitor, an LED, a light-receiving photodiode, a microphone, a blood pressure monitor, or a combination thereof to detect the first biological information. The first sensor unit 1 preferably has a three-axis accelerometer, a thermometer, an electrode, an LED, a light-receiving photodiode, or a combination thereof to detect the second biological information.

[0022] The first discriminator 11 discriminates whether or not the living body is in a state of cardiac arrest based on the first biological information. For example, the first discriminator 11 discriminates whether or not the living body is in a state of cardiac arrest if the first biological information cannot be detected for a certain period of time. For example, when the first biological information is an electrocardiogram waveform, it can discriminate whether or not the living body is in a state of cardiac arrest if an R wave is not present for a certain period of time. Alternatively, it can discriminate whether or not the living body is in a state of cardiac arrest if P waves, Q waves, R waves, S waves, T waves, and U waves are not present for a certain period of time. Note that the electrocardiogram waveform can be acquired using multiple electrodes. Note that the first discriminator 11 may determine whether or not the living body is in a state of cardiac arrest by digitizing the first biological information and comparing it with a preset threshold value. Alternatively, the first discriminator 11 may determine whether or not the living body is in a state of cardiac arrest based on the first biological information and the second biological information.

[0023] When the first biological information is a heartbeat, the heart rate (bpm) is calculated from the number of heartbeats in a certain period of time, and if the heart rate (bpm) is 0, it can be determined that the patient is in cardiac arrest. The heart rate (bpm) may be calculated based on the R-R interval. The heartbeat may be acquired using multiple electrodes or may be acquired by an optical heartbeat sensor including an LED and a light-receiving photodiode.

[0024] Similarly, when the first biological information is a pulse or pulse wave, if the pulse rate (bpm) is 0 or there is no pulse wave for a certain period of time, it can be determined that the patient is in cardiac arrest. The pulse can be obtained by an optical pulse wave sensor including an LED and a light-receiving photodiode.

[0025] When the first biological information is a heart sound, if no heart sound is detected for a certain period of time, it can be determined that the patient is in a state of cardiac arrest. The heart sound can be detected, for example, by a cardiac microphone.

[0026] When the first biological information is respiration, if, for example, breathing sounds, breathing rate, rhythm, or ventilation volume cannot be detected for a certain period of time, it can be determined that the patient is in cardiac arrest. Breathing sounds can be detected, for example, by a throat microphone. Breathing rate, rhythm, and ventilation volume can be detected, for example, by changes in capacitance due to expansion and contraction of a capacitor. Note that breathing rate and ventilation volume may be calculated based on a correlation with heart rate variability.

[0027] When the first biological information is blood pressure, for example, if systolic blood pressure cannot be detected for a certain period of time, it can be determined that the patient is in cardiac arrest. Blood pressure can be measured, for example, by a blood pressure monitor with a cuff. Blood pressure may also be calculated based on the blood volume measured by an optical pulse wave sensor including an LED and a light-receiving photodiode.

[0028] The second discrimination unit 12 determines whether or not the first sensor unit 1 is attached to the living body. For example, if the second discrimination unit 12 can detect the second biological information for a certain period of time, it determines that the first sensor unit 1 is attached to the living body. Note that the second discrimination unit 12 may also determine whether or not the first sensor unit 1 is attached to the living body by digitizing the second biological information and comparing it with a preset threshold value.

[0029] When the second biological information is body movement, for example, if body movement can be detected within a certain period of time, it can be determined that the first sensor unit 1 is attached to the living body. For example, body movement can be detected based on impact, vibration, tilt relative to the direction of gravity, position, movement distance, or a combination of these. Impact, vibration, and tilt relative to the direction of gravity can be detected, for example, by a three-axis accelerometer. Specifically, if impact or vibration is detected within a certain period of time, it can be determined that the sensor is attached. Furthermore, if the tilt relative to the direction of gravity changes within a certain period of time, it can be determined that the sensor is attached. Furthermore, by detecting the tilt relative to the direction of gravity, it is also possible to detect the body position of the living body, such as standing or lying down. The position and movement distance can be detected using GPS.

[0030] When the second biological information is body temperature, it can be determined that the first sensor unit 1 is attached to a living body if, for example, body temperature can be detected for a certain period of time. The body temperature is preferably 34 to 38°C, and more preferably 35 to 37°C. The body temperature can be measured using a thermometer such as an infrared temperature sensor, a thermistor temperature sensor, or a thermocouple temperature sensor.

[0031] When the second biological information is a body surface potential, for example, if the body surface potential can be detected for a certain period of time, it can be determined that the first sensor unit 1 is attached to the living body. The body surface potential can be acquired using multiple electrodes.

[0032] When the second biological information is blood oxygen saturation, for example, if blood oxygen saturation can be detected for a certain period of time, it can be determined that the first sensor unit 1 is attached to the living body. Note that blood oxygen saturation can be obtained by an optical sensor including an LED and a light-receiving photodiode.

[0033] When the second biological information is moisture content, it can be determined that the first sensor unit 1 is attached to the living body if, for example, the moisture content of the skin can be detected for a certain period of time. The moisture content of the skin can be measured, for example, by a keratin moisture meter. An example of a keratin moisture meter is one that generates an electric field on the skin using electrodes, measures the capacitance, and measures the moisture content based on the capacitance.

[0034] The control unit 10 can control the operation of the reporting device 60, and can execute each function of the reporting device 60, for example, by executing a program stored in the storage unit 13. The control unit 10 preferably realizes the functions of the first determination unit 11, the second determination unit 12, etc., by executing a program stored in the storage unit 13, for example, by using a processor. The processor preferably includes a central processing unit (CPU), a graphics processing unit (GPU), a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a combination thereof.

[0035] The storage unit 13 preferably includes a semiconductor memory, a magnetic memory, an optical memory, or a combination thereof. Examples of semiconductor memory include a random access memory (RAM), a read only memory (ROM), and a flash memory. Examples of flash memory include a solid-state drive (SSD). Examples of magnetic memory include a hard disk drive (HDD). The storage unit 13 may function as a main storage device, an auxiliary storage device, and / or a cache memory. The storage unit 13 may also include a volatile memory, a non-volatile memory, or both. The program is preferably stored in the storage unit 13 in advance, but may also be downloaded from an external device and stored in the storage unit 13. The storage unit 13 preferably stores information about the destination of the first message. The storage unit 13 may also store detected biometric information and thresholds for each biometric information.

[0036] The first notification unit 14 makes the first notification when the first determination unit 11 determines that the living body is in a state of cardiac arrest and the second determination unit 12 determines that the living body is attached to the first sensor unit 1. Specifically, the control unit 10 may cause the first notification unit 14 to make the first notification when the first determination unit 11 determines that the living body is in a state of cardiac arrest and the second determination unit 12 determines that the first sensor unit 1 is attached to the living body.

[0037] The first notification unit 14 can communicate with the management device 70, for example, via the communication network 30. While wireless communication is preferred, wired communication is also acceptable. The communication may be radio wave communication, optical communication, acoustic wave communication, or infrared communication. The first notification unit 14 is required to be able to transmit at least a communication signal, but may also be able to receive a communication signal. The function of the first notification unit 14 is realized, for example, by a network interface. The network interface may be an interface compatible with LTE, 4G, or 5G standards, an interface compatible with short-range wireless communication such as Bluetooth (registered trademark), an interface compatible with wireless LAN communication standards, or an interface compatible with wired LAN communication standards. The first notification unit 14 may have a network interface card (NIC) or a communication antenna. The information transmitted by the first notification preferably includes information on the occurrence of cardiac arrest, the first vital sign information, and the second vital sign information. The information transmitted by the first notification may further include the identification number of the notification device 60, the name, the address, and other personal information of the wearer.

[0038] Although not shown, the reporting device 60 may further have an operation input unit, an alarm unit, a timer unit, etc. The operation input unit is, for example, a unit that turns the power of the reporting device 60 on and off, and sets the biometric information detection operation on and off, etc. The operation input unit may include a touch panel. The alarm unit is, for example, a unit that notifies the wearer that a first report will be made by displaying a message, sounding an alarm, vibrating, etc. The timer unit is, for example, a unit that measures the time and detection time.

[0039] The management device 70 can send a second notification to the notification receiving terminal 80 via, for example, the communication network 30. This communication may be wireless or wired. The management device 70 is preferably a personal computer and may be a so-called server. The notification receiving terminal 80 is preferably a mobile phone, smartphone, tablet terminal, or personal computer. The notification receiving terminal 80 may be, for example, a terminal owned by a close relative, a terminal owned by a neighbor, a terminal located in a fire department command and information center, or a terminal located in an ambulance. This allows a person who receives the second notification to learn of the wearer's cardiac arrest via the notification receiving terminal 80 and to go to rescue the wearer of the notification device 60. The management device 70 may send the second notification to multiple notification receiving terminals 80. When the notification receiving terminal 80 receives the second notification, it can notify the wearer of cardiac arrest by, for example, displaying a message indicating cardiac arrest, sounding an alarm, vibrating, or performing other operations.

[0040] 1, the management device 70 preferably includes a receiving unit 25, a control unit 20, a true / false determination unit 21, a storage unit 23, and a second notification unit 24. Although not shown, the management device 70 may further include an operation input unit, etc.

[0041] The receiving unit 25 can receive the first report, for example, via the communication network 30. The communication may be wireless or wired. The communication may be radio wave communication, optical communication, sound wave communication, or infrared communication. The function of the receiving unit 25 is realized by, for example, a network interface. The network interface may be an interface compatible with the LTE, 4G, or 5G standard, an interface compatible with short-range wireless communication such as Bluetooth (registered trademark), an interface compatible with a wireless LAN communication standard, or an interface compatible with a wired LAN communication standard. The receiving unit 25 may have an NIC or a communication antenna.

[0042] The control unit 20 can control the operation of the management device 70, and can execute each function of the management device 70, for example, by executing a program stored in the storage unit 23. For example, the control unit 20 preferably realizes functions such as the true / false determination unit 21 by executing a program stored in the storage unit 23 using a processor. The processor preferably includes a CPU, a GPU, an FPGA, an ASIC, or a combination of these.

[0043] The storage unit 23 preferably includes a semiconductor memory, a magnetic memory, an optical memory, or a combination thereof. Examples of semiconductor memory include RAM, ROM, and flash memory. Examples of flash memory include SSD. Examples of magnetic memory include HDD. The storage unit 23 may function as a main storage device, an auxiliary storage device, and / or a cache memory. The storage unit 23 may also include volatile memory, non-volatile memory, or both. It is preferable that the program is stored in the storage unit 23 in advance, but it may also be downloaded from an external device and stored in the storage unit 23. It is preferable that information about the destination of the second message is stored in the storage unit 23. The received biometric information may also be stored in the storage unit 23.

[0044] The authenticity discrimination unit 21 is a unit that discriminates whether the first report received from the reporting device 60 is authentic. For example, the authenticity of the first report can be discriminated using a trained model of the first biometric information of a large number of wearers, information on the state of attachment of the first sensor unit to the living body, and information on the authenticity of the first report stored in the memory unit 23. The memory unit 23 preferably has a trained model that uses such first biometric information, information on the state of attachment of the first sensor unit to the living body, and information on the authenticity of the report as training data. As a result, the authenticity discrimination unit 21 can discriminate whether the first report is authentic by inputting the first biometric information associated with the first report and information on the state of attachment of the first sensor unit 1 to the trained model and outputting the result. Specifically, if the trained model outputs that the first report is authentic, i.e., if the authenticity discrimination unit 21 determines that the first report is authentic, the control unit 20 may cause the second reporting unit 24 to issue the second report.

[0045] The second reporting unit 24 can communicate with the receiving terminal 80 via, for example, the communication network 30. The communication may be wireless or wired. The communication may be radio wave communication, optical communication, sound wave communication, or infrared communication. The function of the second reporting unit 24 is realized by, for example, a network interface. The network interface may be an interface compatible with the LTE, 4G, or 5G standard, an interface compatible with short-range wireless communication such as Bluetooth (registered trademark), an interface compatible with a wireless LAN communication standard, or an interface compatible with a wired LAN communication standard. The second reporting unit 24 may have an NIC or a communication antenna. The information transmitted by the second reporting may include the identification number of the reporting device 60, the identification number of the management device 70, and personal information of the wearer, such as the name and address.

[0046] The above describes an embodiment in which the management device 70 has a true / false discrimination unit 21, but the management device 70 may not have a true / false discrimination unit 21, i.e., it may not discriminate true / false, and may instead send a second report to the receiving terminal 80, which is the report destination stored in the memory unit 23.

[0047] Although the case where the reporting system 91 includes the management device 70 has been described, the reporting system 91 may not include the management device 70, and the reporting device 60 may directly send a first report to the receiving terminal 80. In this case, the reporting system 91 will only send the first report without sending a second report. The reporting device 60 may also include a true / false discrimination unit 21. In this case, the trained model may be stored in the memory unit 13. In this manner, the reporting device 60 may include at least some of the multiple functional units of the management device 70. On the other hand, the management device 70 may also include at least some of the multiple functional units of the reporting device 60. The multiple functional units exemplified as being realized by the reporting device 60 may be realized by multiple devices. The multiple functional units exemplified as being realized by the management device 70 may also be realized by multiple devices. In addition, in FIG. 1, a functional unit shown as a single block may be divided into multiple units and realized, or functional units shown as different blocks may be realized as a single unit.

[0048] Next, an example of the processing procedure up to the first notification in the notification device 60 will be described below with reference to Figure 2. First, the first sensor unit 1 starts detecting the first biometric information and the second biometric information (step S1). At this time, it is not necessary to start the detecting operations of the first biometric information and the second biometric information at the same time; the detecting operation of the first biometric information may start first, or the detecting operation of the second biometric information may start first.

[0049] The first discriminator 11 discriminates whether or not the patient is in a state of cardiac arrest based on whether or not the first biological information can be detected within a certain period of time (step S2). For example, if the first biological information is an electrocardiogram waveform, it may be determined that the patient is in a state of cardiac arrest if no R wave is present within a certain period of time. Alternatively, it may be determined that the patient is in a state of cardiac arrest if no P wave, Q wave, R wave, S wave, T wave, or U wave is present within a certain period of time. For other cases, please refer to the description of the first biological information above.

[0050] If the first biological information is detected and the first discriminator 11 determines that the patient is not in cardiac arrest, the process returns to step S1, and the first sensor 1 again performs the operation of detecting the first biological information and the second biological information. On the other hand, if the first biological information is not detected and the first discriminator 11 determines that the patient is in cardiac arrest, the second discriminator 12 determines whether the first sensor 1 is attached to the patient based on whether the second biological information is detected within a certain period of time (step S3).

[0051] If the second biological information is not detected and the second discrimination unit 12 determines that the first sensor unit 1 is not attached to the living body, the process returns to step S1, and the first sensor unit 1 again performs the operation of detecting the first biological information and the second biological information. On the other hand, if the second biological information is detected and the second discrimination unit 12 determines that the first sensor unit 1 is attached to the living body, the first notification unit 14 sends a first notification to the management device 70 (step S4).

[0052] In the above treatment procedure, the first discrimination unit 11 and the second discrimination unit 12 are discriminated in this order in steps S2 and S3, but the second discrimination unit 12 may be discriminated in this order, and the first discrimination unit 11 may be discriminated in this order. The above treatment procedure may include steps other than steps S1 to S4.

[0053] In addition, in the processing procedure up to the first notification in the notification device 60, the operation of detecting the second biological information may be started after the first determination unit 11 determines that the patient is in a state of cardiac arrest, as shown in Fig. 3. In this case, it is possible to reduce the power consumption required for the operation of detecting the second biological information. The procedure in this case will be described in detail below. First, the operation of detecting the first biological information by the first sensor unit 1 is started (step S11).

[0054] The first discriminator 11 discriminates whether or not the patient is in a state of cardiac arrest based on whether or not the first biological information is detected within a certain period of time (step S12).

[0055] If the first biological information is detected and the first discrimination unit 11 determines that the patient is not in a state of cardiac arrest, the process returns to step S11, and the first sensor unit 1 again performs the operation of detecting the first biological information. On the other hand, if the first biological information is not detected and the first discrimination unit 11 determines that the patient is in a state of cardiac arrest, the first sensor unit 1 starts the operation of detecting the second biological information (step S13).

[0056] The second determination unit 12 determines whether or not the first sensor unit 1 is attached to a living body, based on whether or not the second biological information is detected within a certain period of time (step S14).

[0057] If the second biological information is not detected and the second discrimination unit 12 determines that the first sensor unit 1 is not attached to the living body, the process returns to step S11, and the first sensor unit 1 performs the operation of detecting the first biological information again. On the other hand, if the second biological information is detected and the second discrimination unit 12 determines that the first sensor unit 1 is attached to the living body, the first notification unit 14 sends a first notification to the management device 70 (step S15).

[0058] In the above treatment procedure, the first discrimination unit 11 and the second discrimination unit 12 are discriminated in this order, but the second discrimination unit 12 and the first discrimination unit 11 may be discriminated in this order. The above treatment procedure may include steps other than steps S11 to S15.

[0059] An example of the processing procedure up to the second notification in the management device 70 will be described below with reference to Fig. 4. First, the receiving unit 25 of the management device 70 receives the first notification and the accompanying information such as the first biological information and information on the attachment state of the first sensor unit 1 to the living body (second biological information) (step S21).

[0060] The true / false discrimination unit 21 inputs the first biometric information accompanying the first report received from the reporting device 60 and information on the state of attachment of the first sensor unit 1 to the living body (second biometric information) into a learned model and outputs the result to determine whether the first report is true or false (step S22).

[0061] If the first notification is determined to be false, the process ends. On the other hand, if the first notification is determined to be true, the second notification unit 24 sends a second notification to the notification receiving terminal 80 (step S23).

[0062] The above treatment procedure may include steps other than steps S21 to S23.

[0063] The reporting system according to the second embodiment will be described in detail below with reference to Fig. 5. Fig. 5 is a block diagram showing an example of the configuration of the reporting system according to the second embodiment.

[0064] The reporting system 92 according to the second embodiment differs from the reporting system 91 according to the first embodiment in that it includes a second sensor unit 2. For the configuration other than the second sensor unit 2, the description of the reporting system 91 may be referred to.

[0065] The second sensor unit 2 detects the attachment state of the first sensor unit 1 to the living body. The information detected by the second sensor unit 2 preferably includes, for example, electrical resistance, voltage, capacitance, induced current, induced electromotive force, frictional heat, or a combination thereof. For example, if at least a portion of the notification device 60 changes from a first shape to a second shape when the notification device 60 is removed from the living body, this information preferably occurs or changes in association with the change in shape. For example, if the notification device 60 changes shape when removed from the living body, generating an induced current, detecting the induced current increases the likelihood that the first sensor unit 1 is not attached to the living body. Furthermore, the information detected by the second sensor unit 2 preferably includes electrical resistance, voltage, capacitance, or a combination thereof. Because these are detectable as continuous information rather than transient, they are even more useful as information that can serve as the basis for determining whether the device is attached or not. Furthermore, such continuous information can shorten the time required for detecting the attachment state. Hereinafter, the physical information that occurs or changes when the reporting device 60 is removed from the living body and at least a part of the reporting device 60 changes from a first shape to a second shape may be specifically referred to as deformation information.

[0066] The second sensor unit 2 may detect the wearing state continuously or at regular intervals. For example, the wearing state may be detected every 0.5 to 20 seconds or every 1.0 to 15 seconds. There may be a non-operating period between the regular intervals during which the wearing state detection operation is not performed, but there may also be no non-operating period.

[0067] When the information on the wearing status is continuous information, the time for the operation of detecting the wearing status is preferably shorter than or equal to the time for the operation of detecting the first biological information, and more preferably shorter than the time for the operation of detecting the first biological information. This reduces the power consumption until the first notification. On the other hand, when the information on the wearing status is transient biological information, the time for the operation of detecting the information on the wearing status is preferably longer than the time for the operation of detecting the first biological information.

[0068] The second sensor unit 2 may have one sensor or two or more sensors. The second sensor unit 2 preferably has an electrode, a capacitor, an LED, a light-receiving photodiode, a coil, a magnet, or a combination thereof to detect the attachment state of the first sensor unit 1 to the living body.

[0069] In the reporting system 92, the second determination unit 12 determines whether or not the first sensor unit 1 is attached to a living body based on information obtained from the second sensor unit 2. An example of a processing procedure up to the first notification in the reporting device 60 of the reporting system 92 will be described below with reference to FIG. 2. First, the operation of detecting the first biometric information by the first sensor unit 1 and the wearing information (deformation information) by the second sensor unit 2 is started (step S1). At this time, it is not necessary to start the operation of detecting the first biometric information and the wearing information (deformation information) simultaneously; the operation of detecting the first biometric information may be started first, or the operation of detecting the wearing information (deformation information) may be started first.

[0070] The first discriminator 11 discriminates whether or not the patient is in a state of cardiac arrest based on whether or not the first biological information is detected within a certain period of time (step S2).

[0071] If the first biological information is detected and the first discriminator 11 determines that the patient is not in a state of cardiac arrest, the process returns to step S1, where the first sensor unit 1 again performs the operation of detecting the first biological information, and the second sensor unit 2 performs the operation of detecting the attachment information (deformation information). On the other hand, if the first biological information is not detected and the first discriminator 11 determines that the patient is in a state of cardiac arrest, the second discriminator 12 determines whether the first sensor unit 1 is attached to the patient based on whether the attachment information (deformation information) is detected within a certain period of time (step S3).

[0072] If the wearing information (deformation information) is detected and the second discrimination unit 12 determines that the first sensor unit 1 is not attached to the living body, the process returns to step S1, and the first sensor unit 1 again performs the operation of detecting the first biological information, and the second sensor unit 2 performs the operation of detecting the wearing information (deformation information).On the other hand, if the wearing information (deformation information) is not detected and the second discrimination unit 12 determines that the first sensor unit 1 is attached to the living body, the first notification unit 14 sends a first notification to the management device 70 (step S4).

[0073] In the above treatment procedure, the first discrimination unit 11 and the second discrimination unit 12 are discriminated in this order in steps S2 and S3, but the second discrimination unit 12 may be discriminated in this order, and the first discrimination unit 11 may be discriminated in this order. The above treatment procedure may include steps other than steps S1 to S4.

[0074] An example of the processing procedure up to the second notification in the management device 70 of the notification system 92 will be described below with reference to Fig. 4. First, the receiving unit 25 of the management device 70 receives the first notification, the associated first biological information, and information on the attachment of the first sensor unit 1 to the living body (deformation information) (step S21).

[0075] The correctness discrimination unit 21 inputs the first biometric information accompanying the first report received from the reporting device 60 and the information on the attachment of the first sensor unit 1 to the living body (deformation information) into the learned model and outputs the result to determine whether the first report is correct or not (step S22).

[0076] If the first notification is determined to be false, the process ends. On the other hand, if the first notification is determined to be true, the second notification unit 24 sends a second notification to the notification receiving terminal 80 (step S23).

[0077] In the reporting system 92, the second discrimination unit 12 may determine whether or not the first sensor unit 1 is attached to a living body based on information obtained from the first sensor unit and information obtained from the second sensor unit 2. In this case, the information obtained from the first sensor unit is preferably second biological information, and the information obtained from the second sensor unit 2 is preferably deformation information. [Explanation of symbols]

[0078] 1 First sensor section 2 Second sensor section 10 Control Unit 11 1st discrimination part 12 Second discrimination part 13 Storage section 14 First Reporting Department 20 Control Unit 21 Correctness and Incorrectness Section 23 Memory section 24 Second Reporting Department 25 Receiving unit 30 Communication Network 60 Notification device 70 Management device 80 Receiving terminal 91, 92 Reporting System

Claims

1. a first sensor unit that detects first biological information of a living body; a first determination unit that determines whether the living body is in a state of cardiac arrest based on the first biological information; a second determination unit that determines whether the first sensor unit is attached to the living body, A reporting system that issues a first report when the first discrimination unit determines that the living body is in a state of cardiac arrest and the second discrimination unit determines that the first sensor unit is attached to the living body.

2. The notification system according to claim 1 , wherein the first biological information includes a heart rate, an electrocardiogram waveform, a pulse rate, a pulse wave, a heart sound, blood pressure, respiration, or a combination thereof.

3. Further, a second sensor unit is provided to detect a state in which the first sensor unit is attached to the living body, The reporting system according to claim 1 , wherein the second discrimination unit makes a discrimination based on information obtained from the second sensor unit, or based on information obtained from the first sensor unit and information obtained from the second sensor unit.

4. the first sensor unit detects second biological information of the living body, the second biological information including body movement, body temperature, body surface potential, blood oxygen saturation, water content, or a combination thereof; The reporting system according to claim 1 , wherein the second determination unit makes the determination based on the second biological information.

5. a trained model that uses first biological information, information on a state in which the first sensor unit is attached to the living body, and information on whether the report is correct or incorrect as training data; The notification system described in claim 1, wherein the first biometric information accompanying the first notification and information on the state of attachment of the first sensor unit to the living body are input into the trained model, and a second notification is made when the trained model outputs that the notification is correct.

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