WO2021200283A1 - 体調検知方法、体調検知装置及びプログラム - Google Patents
体調検知方法、体調検知装置及びプログラム Download PDFInfo
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- WO2021200283A1 WO2021200283A1 PCT/JP2021/011463 JP2021011463W WO2021200283A1 WO 2021200283 A1 WO2021200283 A1 WO 2021200283A1 JP 2021011463 W JP2021011463 W JP 2021011463W WO 2021200283 A1 WO2021200283 A1 WO 2021200283A1
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
- G16H20/30—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to physical therapies or activities, e.g. physiotherapy, acupressure or exercising
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
- G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
- G16H40/63—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
- A61B5/113—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb occurring during breathing
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B31/00—Predictive alarm systems characterised by extrapolation or other computation using updated historic data
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
- G16H50/20—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for computer-aided diagnosis, e.g. based on medical expert systems
Definitions
- This disclosure relates to a physical condition detection method, a physical condition detection device, and a program.
- Patent Document 1 proposes a care system that enables a close relative in a remote place to witness and care for the death of a close relative.
- the correlation between the information on each change such as electrocardiogram and heart rate obtained from a large number of past deaths and the information on how long after each change of the person died. It is disclosed to obtain the estimated time of death of the subject from the present based on the information provided.
- body movement data data such as heartbeat, respiration and body movement of the relative himself, that is, the subject himself. It is also desired to detect changes in the physical condition of the subject at an early stage, including changes in physical condition toward death during terminal care.
- the present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a physical condition detection method, a physical condition detection device, and a program capable of detecting a change in the physical condition of a subject.
- the physical condition detection method is a physical condition detection method performed by a computer, and acquires body movement data of a subject at a certain time including the present.
- a mathematical model constructed using the body movement data of the target person in the past period when the physical condition of the target person was in a steady state
- the body movement data of the target person at the current time is used to obtain the target person's body movement data.
- a steady state model that expresses the current state of the physical condition of the subject and is generated from the body movement data of the subject in the past period by using the mathematical model.
- the current state model is output in order to detect a change in the physical condition of the subject based on the difference obtained by comparing the current state model with the current state model.
- a recording medium such as a system, a method, an integrated circuit, a computer program, or a computer-readable CD-ROM, and the system, the method, the method, and the like. It may be implemented using any combination of integrated circuits, computer programs and recording media.
- FIG. 1 is a diagram showing an example of a configuration of a physical condition detection system according to an embodiment.
- FIG. 2 is a diagram showing an example of the configuration of the physical condition detection device according to the embodiment.
- FIG. 3 is a diagram showing an example of a target person from which body movement data according to the embodiment is acquired.
- FIG. 4A is a flowchart showing the operation of the physical condition detection device according to the embodiment.
- FIG. 4B is a flowchart showing the operation of the physical condition detection device according to the embodiment.
- FIG. 5A is a diagram showing a steady state model and a current state model according to the first embodiment of the embodiment.
- FIG. 5B is a diagram showing a steady state model and a current state model according to the first embodiment of the embodiment.
- FIG. 5A is a diagram showing a steady state model and a current state model according to the first embodiment of the embodiment.
- FIG. 5C is a diagram showing a steady state model and a current state model according to the first embodiment of the embodiment.
- FIG. 6A is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6B is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6C is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6D is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6E is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6A is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6B is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6C is
- FIG. 6F is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6G is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6H is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 6I is a diagram showing a steady state model and a current state model according to the second embodiment of the embodiment.
- FIG. 7 is a diagram showing an example of the configuration of the physical condition change detection device according to the embodiment.
- FIG. 8 is a diagram showing a performance verification result when a mathematical model is constructed using 7 patterns of features.
- the physical condition detection method is a physical condition detection method performed by a computer, in which physical condition data of a subject at a certain time including the present is acquired, and the physical condition of the subject is in a steady state.
- a mathematical model constructed using the body movement data of the target person in the past period
- the current state of the physical condition of the target person is expressed from the body movement data of the target person at the current time.
- a state model is generated, and the steady state model expressing the steady state of the physical condition of the subject generated by using the mathematical model from the body movement data of the subject in the past period is compared with the current state model.
- the current state model is output in order to detect a change in the physical condition of the subject based on the difference obtained.
- the difference is obtained, and an alert is notified based on the difference.
- the alert when notifying the alert, the alert may be notified when a change in the physical condition of the target person is detected based on the difference.
- the difference is the distance between the steady state model and the current state model, and the direction of movement from the portion where the steady state model is located to the portion where the current state model is located.
- a change in the physical condition of the subject is detected based on the direction.
- the steady state model is generated from the body movement data of the subject in the past period by using the mathematical model.
- the steady state of the target person can be obtained from the body movement data of the target person in a new past period including the current time.
- the steady-state model shown may be regenerated.
- the period during which the subject's physical condition used to generate the steady state model was in the steady state can be set to a period closer to the present, so that the change in the subject's physical condition can be detected more accurately.
- the mathematical model may be constructed by using the feature amount obtained by calculating the statistic based on the interaction from the body movement data of the subject in the past period.
- the physical condition detection device includes an acquisition unit that acquires body movement data of a subject at a certain time including the present, and the physical condition detecting device in the past period in which the physical condition of the subject has been in a steady state.
- a current state model that expresses the current state of the target person's physical condition from the target person's body movement data at the current time acquired by the acquisition unit using a mathematical model constructed using the target person's body movement data.
- a steady state model expressing the steady state of the physical condition of the target person generated by using the mathematical model from the body movement data of the target person in the past period, and the current state model.
- an output unit that outputs the current state model is provided.
- a recording medium such as a system, a method, an integrated circuit, a computer program, or a computer-readable CD-ROM, and the system, the method, the method, and the like. It may be implemented using any combination of integrated circuits, computer programs or recording media.
- FIG. 1 is a diagram showing an example of a configuration of a physical condition detection system according to the present embodiment.
- the physical condition detection system can detect changes in the physical condition of the target person by including at least the physical condition detection device 10.
- the physical condition detection system includes a physical condition detection device 10, a physical condition change detection device 20, and a room sensor 30, which are connected by a network 40.
- the room sensor 30 is installed in the room where the target person exists and acquires the biological information of the target person.
- the physical condition detection device 10 acquires the biological information of the target person from the room sensor 30, generates and outputs the information used for detecting the physical condition of the target person.
- the physical condition change detection device 20 detects and notifies the physical condition change of the target person by using the information output by the physical condition detection device 10.
- the room sensor 30 is an example, and may be any sensor that can acquire biometric information of the target person.
- the room sensor 30 may be, for example, a sensor worn on the subject, or a sheet-type sensor laid under the sheets or mat of the bed.
- FIG. 2 is a diagram showing an example of the configuration of the physical condition detection device 10 according to the present embodiment.
- the physical condition detection device 10 outputs a state model expressing the state of the target person's physical condition as information for detecting a change in the physical condition of the target person, and outputs a state model generated from the body movement data of the target person himself / herself.
- the physical condition detection device 10 includes an acquisition unit 11, a processing unit 12, and an output unit 13.
- each component will be described in detail.
- the acquisition unit 11 acquires the body movement data of the target person from the room sensor 30 via the network 40. More specifically, the acquisition unit 11 acquires the body movement data of the target person at the current time, which is a fixed time including the present. In addition, the acquisition unit 11 may acquire the body movement data of the target person in the past period.
- the body movement data includes, for example, heartbeat information, respiration information, and body movement information of the subject, but is not limited to this, and may be biological information of the subject.
- the heartbeat information includes the time-series heartbeat data of the subject linked to the time
- the breathing information includes the time-series breathing data of the subject linked to the time
- the body movement information includes the time-series breathing data. Includes time-series body movement data of the associated subject.
- body movement is the movement of the body, but in the medical field, it often represents the movement of the body unconsciously such as at bedtime.
- FIG. 3 is a diagram showing an example of a target person for which body movement data according to the present embodiment is acquired.
- the subject 50 shown in FIG. 3 is, for example, a patient who is undergoing terminal care at a hospice facility.
- the subject 50 has three types of biological information, heartbeat information, respiration information, and body movement information, acquired as body movement data by a room sensor 30 installed in a hospice facility.
- the physical condition detection device 10 outputs information for detecting a change in the physical condition of the subject using the body movement data when the subject 50 is sleeping in the bed 60. Further, the change in physical condition in this case means that the physical condition of the subject 50 changed toward death during terminal care.
- the subject for detecting the physical condition is not limited to the example of the patient at the hospice facility as described above, and may be a patient with myocardial infarction or apnea syndrome. Further, the target person for detecting the physical condition does not have to be a patient, and may be a person who wants to detect the physical condition using the body movement data at bedtime.
- the processing unit 12 uses the mathematical model 121 constructed by using the body movement data of the target person in the past period when the physical condition of the target person was in a steady state, and uses the body movement data of the target person at the current time to obtain the target person. Generates a current state model that expresses the current state of the physical condition of.
- the processing unit 12 uses the mathematical model 121 to generate a steady state model expressing the steady state of the physical condition of the target person generated from the body movement data of the target person in the past period. If there is no difference between the steady state model and the current state model, the processing unit 12 obtains a steady state model indicating the steady state of the target person from the body movement data of the target person in a new past period including the current time. It may be regenerated. After that, the physical condition of the subject will be detected using the regenerated steady state model.
- the mathematical model 121 is generated (also referred to as learned) by constructing a neural network from a steady-state data set, that is, body motion data of the subject in the past period when the subject's physical condition was steady. By evaluating the model, it is constructed for each subject.
- the mathematical model 121 is constructed by using the feature amount obtained by calculating the statistic based on the interaction from the body movement data of the subject in the past period.
- the characteristic amounts include, for example, the moving average value (speed) of each of the heartbeat component and the respiratory component, the movement skewness (distortion of distribution), the dispersion of the respiratory component (sagging), and the outlier value of the heartbeat component (movement outlier).
- a steady-state data set that is, body motion data of the subject in the past period when the subject's physical condition was steady.
- the characteristic amounts include, for example, the moving average value (speed) of each of the heartbeat component and the respiratory component, the movement skewness (distortion of distribution), the disper
- the output unit 13 outputs the state model generated by the processing unit 12. More specifically, the output unit 13 outputs the steady state model generated by the processing unit 12. Further, the output unit 13 outputs the current state model generated by the processing unit 12 in order to detect a change in the physical condition of the target person by the difference obtained by comparing the steady state model and the current state model.
- FIG. 4A and 4B are flowcharts showing the operation of the physical condition detection device 10 according to the present embodiment.
- FIG. 4A shows the operation from the construction of the mathematical model to the generation of the steady state model by the physical condition detection device 10.
- FIG. 4B shows the operation of the physical condition detection device 10 to generate the current state model.
- a mathematical model 121 is constructed using the body movement data of the subject in the past period when the physical condition of the subject was in a steady state (S10).
- the mathematical model 121 is constructed using the feature amount obtained by calculating the statistic based on the interaction from the body movement data of the subject in the past period when the physical condition of the subject was in a steady state. ..
- the computer of the physical condition detection device 10 uses the mathematical model 121 constructed in step S10 to obtain a steady state model of the subject from the body movement data of the subject in the past period when the physical condition of the subject was steady. Is generated (S11).
- the computer of the physical condition detection device 10 outputs the steady state model generated in step S11 (S12).
- the computer of the physical condition detection device 10 acquires the body movement data of the target person at the current time, which is a fixed time including the present (S20).
- the computer of the physical condition detection device 10 uses the mathematical model 121 constructed in advance to generate a current state model of the target person from the body movement data of the target person at the current time acquired in step S20 (S21).
- the computer of the physical condition detection device 10 outputs the current state model generated in step S12 in order to detect the change in the physical condition of the target person (S22).
- the difference between the steady state model and the current state model is obtained by comparing the output steady state model and the current state model by displaying them on a display or the like, the physical condition of the subject changes. Can be detected.
- Example 1 are diagrams showing a steady state model and a current state model according to the first embodiment of the present embodiment.
- the subject whose physical condition is detected is a patient at a hospice facility, and body movement data is acquired by a room sensor 30 as shown in FIG.
- the steady state model and the current state model shown in FIGS. 5A to 5C are generated by using the body movement data when the subject 50 is sleeping in the bed 60.
- FIG. 5A shows a current state model when “12:00 to 24:00 on 5/17” is the current time.
- FIG. 5B shows a current state model when "0:00 to 12:00 on 5/18" is the current time.
- FIG. 5C shows a current state model when “12:00 to 24:00 on 5/18” is the current time.
- each of FIGS. 5A to 5C also shows a steady state model in the past period in which the physical condition of the subject 50 was in a steady state. The subject 50 died around "24:00 on 5/20".
- the current state model gradually moves downward compared to the steady state model from "0:00 to 12:00 on 5/18" shown in FIG. 5B, that is, from the morning of 5/18. I'm moving. Then, after "12:00 to 24:00 on 5/18" shown in FIG. 5C, that is, after the afternoon of 5/18, the current state model clearly moves downward as compared with the steady state model. Recognize.
- Example 2 are diagrams showing a steady state model and a current state model according to the second embodiment of the present embodiment.
- the subject is different from the subject according to Example 1, but is a patient in a hospice facility, and body movement data is acquired by the room sensor 30 as shown in FIG. Further, the steady state model and the current state model shown in FIGS. 6A to 6I are generated by using the body movement data when the subject 50 is sleeping in the bed 60.
- FIG. 6A shows the current state model when "12:00 to 24:00 on 5/16" is the current time.
- FIG. 6B shows a current state model when "0:00 to 12:00 on 5/17” is the current time.
- FIG. 6C shows a current state model when “12:00 to 24:00 on 5/17” is the current time.
- FIG. 6D shows a current state model when "0: 00-12: 00 on 5/18” is set as the current time.
- FIG. 6E shows a current state model when “12:00 to 24:00 on 5/18” is the current time.
- FIG. 6F shows a current state model when "0:00 to 12:00 on 5/19” is set as the current time.
- FIG. 6G shows a current state model when "12:00 to 24:00 on 5/19” is the current time.
- FIG. 6H shows a current state model when "0:00 to 12:00 on 5/20” is set as the current time.
- FIG. 6I shows a current state model when "12:00 to 24:00 on 5/20” is the current time.
- FIGS. 6A to 6I also shows a steady state model in the past period in which the physical condition of the subject 50 was in a steady state.
- the subject 50 died around "24:00 on 5/20".
- the current state model gradually deviated from the steady state model from "0:00 to 12:00 on 5/18" shown in FIG. 6D, that is, from the morning of 5/18. You can see that it behaves (becomes an out-of-order distribution). Further, at "0:00 to 12:00 on 5/19” shown in FIG. 6F, that is, in the morning of 5/19, the current state model has moved to a position clearly deviated from the steady state model. I understand that. Then, after "12:00 to 24:00 on 5/20" shown in FIG. 6I, that is, after the afternoon of 5/20, the current state model has moved to a completely different position as compared with the steady state model. You can see that.
- the staff of the hospice facility can detect the change in the patient's physical condition on a daily basis of several days ago and notify the relatives. You can secure time to spend for care.
- the physical condition detection device 10 may cause the physical condition change detection device 20 to detect that the physical condition of the subject has changed by comparing the steady state model output by the physical condition detection device 10 with the current state model.
- the physical condition change detection device 20 will be described.
- FIG. 7 is a diagram showing an example of the configuration of the physical condition change detection device 20 according to the present embodiment.
- the physical condition change detection device 20 can detect that the physical condition of the subject has changed by comparing the steady state model output by the physical condition detection device 10 with the current state model.
- the physical condition change detection device 20 includes an acquisition unit 201, a storage unit 202, a physical condition change detection unit 203, and a notification unit 204.
- an acquisition unit 201 the physical condition change detection device 20 includes an acquisition unit 201, a storage unit 202, a physical condition change detection unit 203, and a notification unit 204.
- the acquisition unit 11 acquires the steady state model output by the physical condition detection device 10 via the network 40 in advance and stores it in the storage unit 202. Further, the acquisition unit 11 acquires the current state model output by the physical condition detection device 10 via the network 40. The acquisition unit 11 acquires the current state model output by the physical condition detection device 10 at predetermined time intervals.
- the storage unit 202 has a non-volatile storage area, and stores information used for various processes performed by the physical condition change detection device 20.
- the storage unit 202 is, for example, a ROM (Read Only Memory), a flash memory, an HDD (Hard Disk Drive), or the like.
- the storage unit 202 stores the steady state model output by the physical condition detection device 10. Further, the storage unit 202 may temporarily store the current state model output by the physical condition detection device 10.
- the physical condition change detection unit 203 compares the steady state model with the current state model, and obtains the difference if there is a difference. Further, the physical condition change detection unit 203 detects a change in the physical condition of the subject based on the difference obtained by comparing the steady state model and the current state model.
- the difference is the distance between the steady state model and the current state model, and the direction of movement from the part where the steady state model is located to the part where the current state model is located.
- the physical condition change detection unit 203 arranges the steady state model and the current state model in a space formed by the same coordinate axes. For example, the center of gravity of the distribution of the steady state model is compared with the center of gravity of the distribution of the current state model. As a result of comparison, the physical condition change detection unit 203 may obtain the difference between the centers of gravity of the two as a difference.
- the center of gravity is an example of the distance between the steady state model and the current state model, and is not limited to this.
- the physical condition change detection unit 203 arranges the steady state model and the current state model in a space formed by the same coordinate axes, and a portion where the steady state model is distributed in the space and a portion where the current state model is distributed in the space. You may compare whether or not there is a discrepancy with. In this case, the physical condition change detection unit 203 differs between the distance between the parts distributed in the constant space and the direction in which the steady state model moves from the part distributed in the space to the part where the current state model is distributed in the space. Can be obtained as.
- the physical condition change detection unit 203 may notify the physical condition detection device 10 to that effect via the notification unit 204. As a result, the physical condition change detection unit 203 can give the physical condition detection device 10 a trigger to regenerate the steady state model. Therefore, the physical condition change detection unit 203 can update the steady state model stored in the storage unit 202 to a steady state model with good freshness. Further, the physical condition change detection unit 203 can detect the change in the physical condition of the subject more accurately by using a steady state model with good freshness. That is, since the period during which the subject's physical condition used to generate the steady state model was in the steady state can be set to a period closer to the present, the physical condition detection device 10 detects the change in the subject's physical condition more accurately. can do.
- the notification unit 204 notifies the alert based on the difference obtained by the physical condition change detection unit 203. More specifically, the notification unit 204 notifies an alert when the physical condition change detection unit 203 detects a change in the physical condition of the target person based on the difference obtained by itself. As a result, by receiving the alert, it is possible to know that there has been a change in the physical condition of the target person or that a change in the physical condition of the target person has been detected.
- the notification unit 204 may notify an alert to a mobile terminal such as a smartphone connected via the network 40.
- a mobile terminal such as a smartphone connected via the network 40.
- the physical condition detection device 10 uses a mathematical model constructed from the body movement data when the physical condition of the subject is in the steady state, and determines the steady state of the physical condition of the subject.
- the expressed steady state model can be generated and output.
- the physical condition detection device 10 according to the present embodiment uses the constructed mathematical model to generate a current state model expressing the current state of the target person's physical condition from the body movement data of the target person at the current time. Can be output. Then, by comparing the steady state model output by the physical condition detection device 10 with the current state model, it is possible to detect a change in the physical condition of the subject.
- the current state model for detecting the change in the physical condition of the target person can be output, so that the change in the physical condition of the target person can be detected. Can be done.
- the mathematical model 121 is obtained by calculating an interaction-based statistic from a steady-state dataset, i.e., the subject's body movement data in the past period when the subject's physical condition was steady. It was explained that it is constructed for each subject using the features.
- FIG. 8 is a diagram showing the performance verification results when a mathematical model is constructed using 7 patterns of features.
- the body movement data used when constructing the mathematical model were the time-series body movement data, heart rate data, and respiration data of the subject as a sample at bedtime in the steady state.
- the subjects sampled were 22 patients at a hospice facility.
- a mathematical model constructed for 22 people was generated using each of the 7 patterns of features. Then, the area occupied by the mathematical model for each individual constructed using the features of each pattern and the area for plotting the daily and individual body movement data from the date of death to 1 to 3 days before are overlapped.
- the number of samples that can be separated is defined as the number that can be judged to be misaligned.
- Patterns 1 to 3 only the feature amount obtained by calculating the moving average from the body movement data was used in order to suppress the fluctuation of the time series data. Patterns 1 to 3 differ only in the moving average time.
- the feature amount obtained by calculating the statistic based on the interaction and the moving average from the same body movement data was used.
- the statistic is a time-series body movement data, heart rate data, respiration data ratio, difference, etc. included in the body movement data. Patterns 4 to 7 differ only in the moving average time.
- the average number of detection days was 2.75 days at the best. Further, it was found that the feature amount obtained by calculating the statistic based on the interaction, as in patterns 4 to 7, can be detected at least 2.4 days ago. In other words, by constructing a mathematical model using the features obtained by calculating the statistic based on the interaction, the change in the body movement data of the subject, that is, the change in the physical condition of the subject two days before the death date. It can be seen that can be detected.
- the physical condition detection device 10 and the like according to one or more aspects of the present disclosure have been described above based on the embodiments and modifications, but the present disclosure is not limited to these embodiments and the like. As long as it does not deviate from the gist of the present disclosure, one or more of the present embodiments may be modified by those skilled in the art, or may be constructed by combining components in different embodiments. It may be included within the scope of the embodiment. For example, the following cases are also included in the present disclosure.
- the above-mentioned physical condition detection device 10 and physical condition change detection device 20 may be used to detect changes in physical condition due to pathology including signs of myocardial infarction and the onset of apnea syndrome.
- the body movement data may appropriately include biological information such as body weight information necessary for detecting a change in physical condition.
- a computer system in which some or all of the components constituting the physical condition detection device 10 and the physical condition change detection device 20 are composed of a microprocessor, ROM, RAM, a hard disk unit, a display unit, a keyboard, a mouse, and the like. It may be.
- a computer program is stored in the RAM or the hard disk unit. When the microprocessor operates according to the computer program, each device achieves its function.
- a computer program is configured by combining a plurality of instruction codes indicating commands to a computer in order to achieve a predetermined function.
- a part or all of the components constituting the physical condition detection device 10 and the physical condition change detection device 20 may be composed of one system LSI (Large Scale Integration). ..
- a system LSI is an ultra-multifunctional LSI manufactured by integrating a plurality of components on one chip, and specifically, is a computer system including a microprocessor, a ROM, a RAM, and the like. ..
- a computer program is stored in the RAM. When the microprocessor operates according to the computer program, the system LSI achieves its function.
- Some or all of the components constituting the physical condition detection device 10 and the physical condition change detection device 20 may be composed of an IC card or a single module that can be attached to and detached from each device.
- the IC card or the module is a computer system composed of a microprocessor, ROM, RAM and the like.
- the IC card or the module may include the above-mentioned super multifunctional LSI.
- the microprocessor operates according to a computer program, the IC card or the module achieves its function. This IC card or this module may have tamper resistance.
- the present disclosure is used for a physical condition detection method, a physical condition detection device, and a program used for detecting not only a change in physical condition toward death in terminal care but also a change in physical condition due to a pathology including signs of myocardial infarction and the onset of apnea syndrome. can.
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Abstract
Description
まず、体調検知方法を実現するために用いられる体調検知システムについて説明する。
図1は、本実施の形態に係る体調検知システムの構成の一例を示す図である。
図2は、本実施の形態に係る体調検知装置10の構成の一例を示す図である。
取得部11は、ネットワーク40を介して、ルームセンサ30から対象者の体動データを取得する。より具体的には、取得部11は、現在を含む一定時間である現在時間における対象者の体動データを取得する。また、取得部11は、過去期間における対象者の体動データを取得してもよい。
処理部12は、対象者の体調が定常状態であった過去期間における対象者の体動データを用いて構築された数理モデル121を用いて、現在時間における対象者の体動データから、対象者の体調の現在状態を表現した現在状態モデルを生成する。
出力部13は、処理部12で生成された状態モデルを出力する。より具体的には、出力部13は、処理部12で生成された定常状態モデルを出力する。また、出力部13は、定常状態モデルと現在状態モデルとを比較して得る差分により対象者の体調の変化を検知させるために、処理部12で生成された現在状態モデルを出力する。
次に、以上のように構成される体調検知装置10の動作等について説明する。
図5A~図5Cは、本実施の形態の実施例1に係る定常状態モデルと現在状態モデルとを示す図である。
図6A~図6Iは、本実施の形態の実施例2に係る定常状態モデルと現在状態モデルとを示す図である。
図7は、本実施の形態に係る体調変化検出装置20の構成の一例を示す図である。
取得部11は、ネットワーク40を介して体調検知装置10により出力された定常状態モデルを前もって取得し、記憶部202に格納する。また、取得部11は、ネットワーク40を介して体調検知装置10により出力された現在状態モデルを取得する。なお、取得部11は、体調検知装置10により出力された現在状態モデルを所定時間毎に取得している。
記憶部202は、不揮発性の記憶領域を有し、体調変化検出装置20が行う各種処理に利用される情報を記憶している。記憶部202は、例えば、ROM(Read Only Memory)、フラッシュメモリ、HDD(Hard Disk Drive)などである。本実施の形態では、記憶部202は、体調検知装置10により出力された定常状態モデルを記憶する。また、記憶部202は、体調検知装置10により出力された現在状態モデルを一時的に記憶してもよい。
体調変化検出部203は、定常状態モデルと現在状態モデルとを比較することで、差分があれば差分を得る。また、体調変化検出部203は、定常状態モデルと現在状態モデルとの比較により得た差分に基づき、対象者の体調の変化を検知する。
通知部204は、体調変化検出部203が得た差分に基づき、アラートを通知する。より具体的には、通知部204は、体調変化検出部203が、自身が得た差分に基づき対象者の体調の変化を検知した場合に、アラートを通知する。これにより、アラートを受け取ることで、対象者の体調の変化があったことまたは対象者の体調の変化が検知されたことを知ることができる。
以上のように、本実施の形態に係る体調検知装置10は、対象者の体調が定常状態であったときの体動データから構築された数理モデルを用いて、対象者の体調の定常状態を表現した定常状態モデルを生成して出力することができる。また、本実施の形態に係る体調検知装置10は、構築された数理モデルを用いて、現在時間における対象者の体動データから、対象者の体調の現在状態を表現した現在状態モデルを生成して出力することができる。そして、体調検知装置10により出力された定常状態モデルと現在状態モデルとを比較することで、対象者の体調の変化を検知することができる。
上記の実施の形態では、数理モデル121は、定常状態のデータセットすなわち対象者の体調が定常状態であった過去期間における対象者の体動データから交互作用に基づく統計量を算出することで得た特徴量を用いて、対象者ごとに構築されると説明した。
11、201 取得部
12 処理部
13 出力部
20 体調変化検出装置
30 ルームセンサ
40 ネットワーク
50 対象者
60 ベッド
121 数理モデル
202 記憶部
203 体調変化検出部
204 通知部
Claims (9)
- コンピュータが行う体調検知方法であって、
現在を含む一定時間である現在時間における対象者の体動データを取得し、
前記対象者の体調が定常状態であった過去期間における前記対象者の体動データを用いて構築された数理モデルを用いて、前記現在時間における前記対象者の体動データから、前記対象者の体調の現在状態を表現した現在状態モデルを生成し、
前記過去期間における前記対象者の前記体動データから前記数理モデルを用いて生成された前記対象者の体調の定常状態を表現した定常状態モデルと前記現在状態モデルとを比較して得た差分により前記対象者の体調の変化を検知するために、前記現在状態モデルを出力する、
体調検知方法。 - さらに、
前記定常状態モデルと前記現在状態モデルとを比較することで、前記差分を得、
前記差分に基づき、アラートを通知する、
請求項1に記載の体調検知方法。 - 前記アラートを通知する際、
前記差分に基づき、前記対象者の体調の変化を検知した場合に、前記アラートを通知する、
請求項2に記載の体調検知方法。 - 前記差分は、前記定常状態モデル及び前記現在状態モデルの距離と、前記定常状態モデルが位置する部分から前記現在状態モデルが位置する部分に移動した方向とであり、
前記距離と前記方向とに基づき、前記対象者の体調の変化を検知する、
請求項3に記載の体調検知方法。 - 前記現在状態モデルを生成する前に、
前記数理モデルを用いて、前記過去期間における前記対象者の前記体動データから前記定常状態モデルを生成する、
請求項1~4のいずれか1項に記載の体調検知方法。 - さらに、前記定常状態モデルと前記現在状態モデルとの差がない場合、前記現在時間を含めた新たな過去期間における前記対象者の前記体動データから、前記対象者の定常状態を示す定常状態モデルを再生成する、
請求項1~5のいずれか1項に記載の体調検知方法。 - 前記数理モデルは、前記過去期間における前記対象者の体動データから交互作用に基づく統計量を算出することで得た特徴量を用いて、構築される、
請求項1~6のいずれか1項に記載の体調検知方法。 - 現在を含む一定時間である現在時間における対象者の体動データを取得し、
前記対象者の体調が定常状態であった過去期間における前記対象者の体動データを用いて構築された数理モデルを用いて、前記現在時間における前記対象者の体動データから、前記対象者の体調の現在状態を表現した現在状態モデルを生成し、
前記過去期間における前記対象者の前記体動データから前記数理モデルを用いて生成された前記対象者の体調の定常状態を表現した定常状態モデルと前記現在状態モデルとを比較して得た差分により前記対象者の体調の変化を検知するために、前記現在状態モデルを出力することを、
コンピュータに実行させるプログラム。 - 現在を含む一定時間である現在時間における対象者の体動データを取得する取得部と、
前記対象者の体調が定常状態であった過去期間における前記対象者の体動データを用いて構築された数理モデルを用いて、前記取得部が取得した前記現在時間における対象者の体動データから、前記対象者の体調の現在状態を表現した現在状態モデルを生成する処理部と、
前記過去期間における前記対象者の前記体動データから前記数理モデルを用いて生成された前記対象者の体調の定常状態を表現した定常状態モデルと前記現在状態モデルとを比較して得た差分により前記対象者の体調の変化を検知するために、前記現在状態モデルを出力する出力部とを備える、
体調検知装置。
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