JP7254337B2 - POSTURE CHANGE DETERMINATION SYSTEM, POSTURE CHANGE DETERMINATION METHOD, AND POSTURE CHANGE DETERMINATION PROGRAM - Google Patents

Description

The present disclosure relates to a postural change determination system, a postural change determination method, and a postural change determination program for managing the time at which the postural change of a bedridden person lying on bedding is performed.

Among hospitalized patients and residents in medical institutions and nursing homes, etc., those who have difficulty in carrying out activities on their own and who require a high degree of nursing care, especially those who are almost bedridden (hereinafter referred to as "long-term bedridden persons") ) cannot roll over on their own. When such a long-term bedridden person remains bedridden in the same posture, pressure is constantly applied to a part of the body, resulting in poor blood flow. It is known that this causes so-called bedsores called decubitus ulcers.

In medical institutions, nursing homes, and the like, a treatment called repositioning is performed in which a long-term bedridden person is made to change the direction of the body at predetermined time intervals in order to prevent pressure ulcers. Also, in order to ensure that this position change is performed reliably in medical institutions and nursing care facilities, for example, the time for the position change is set in a care plan showing a daily schedule. However, workers who change positions in medical institutions, nursing care facilities, etc. are very busy, and in many cases the work of changing positions is not performed according to the nursing care plan. Pressure ulcers can seriously damage people who are bedridden for a long period of time, so it is necessary to change positions according to the nursing care plan.

For example, Patent Literature 1 discloses a health condition detection device capable of detecting a person's health condition 24 hours a day by detecting, with a vibration sensor, vibration caused by breathing activity of a person's lungs and heartbeat. It is The health condition detection device described in Patent Literature 1 can detect a change in body position due to rolling over, etc., by arranging a vibration sensor on the bed.

JP 2019-000673 A

By the way, the health condition detection device described in Patent Document 1 is capable of detecting a change in body position due to rolling over in bed. It does not contribute to reliably changing positions of long-term bedridden persons in institutions, nursing homes, etc. Therefore, there has been a demand for a device or system that assists in reliably changing body positions.

Therefore, in the present disclosure, in addition to memorizing changes in the body position of a bedridden person, in order to assist in reliably changing the body position of a person who cannot turn over on their own, such as a person who has been bedridden for a long time, a bed rest lying on bedding is provided. A posture change determination system, a posture change determination method, and a posture change determination program for managing a person's posture change will be described.

A posture change determination system according to one aspect of the present disclosure is a posture change determination system including bedding and a management device that manages a change in the posture of a person lying on the bedding, wherein the bedding vibrates due to a change in the posture of the person lying on the bed. The management device includes a sensor for detecting a signal receiving unit for receiving a detection signal from the sensor; In this case, the apparatus includes a position change determination unit that determines that the person in bed has changed positions, and a position change storage unit that stores the detection signal in association with the position change of the person in bed.

A postural change determination method according to one aspect of the present disclosure is a postural change determination method for managing a postural change of a bedridden person lying on bedding, wherein the signal receiving unit performs vibration due to the bedclothes provided on the bedclothes. A signal receiving step of receiving a detection signal from a sensor that detects the position change determination unit, when the signal level of the received detection signal changes by a predetermined threshold or more and the change in the detection signal continues for a predetermined time or more , a position change determination step for determining that the person in bed has changed positions, and a position change storage step for storing the detection signal in association with the position change of the person in bed, which is performed by the position change storage unit.

Further, a postural change determination program according to an aspect of the present disclosure is a postural change determination program for managing a postural change of a bedridden person lying on bedding, and a sensor provided in the bedding for detecting vibration due to the bedridden person's postural change. a signal receiving step of receiving a detection signal from the bedside person; and when the signal level of the received detection signal changes by a predetermined threshold value or more and the change in the detection signal continues for a predetermined time or more, it is determined that the bedridden person has changed positions. The computer is caused to execute a position change determination step for determination and a position change storage step for storing the detection signal in association with the position change of the bedridden person.

According to the present disclosure, the bedding is equipped with a sensor that detects the vibration of the bedridden person, and the management device receives a detection signal from the sensor and determines whether or not the bedridden person has changed positions. Leakage can be prevented. This makes it possible to prevent pressure ulcers in long-term bedridden persons.

1 is a functional block configuration diagram showing a body posture change determination system according to an embodiment of the present disclosure; FIG. 1. It is a top view which shows an example which has arrange|positioned the vibration sensor 230 of FIG. 1 to the mattress M of the bed B. FIG. 2 is a flow chart showing the operation of the posture change determination system 1 of FIG. 1; FIG. 3 is a schematic diagram showing an example of a state in which a bed person H is lying face up on the bed B in FIG. 2 ; FIG. 5 is a schematic diagram showing an example of a state in which the bedridden person H of FIG. 4 changes positions to face left. FIG. 5 is a schematic diagram showing another example of a state in which the bedridden person H in FIG. 4 changes positions facing left. FIG. 2 is a time chart showing an example of determining an alert output time in an alert output unit 154 of FIG. 1; FIG. 1 is a functional block configuration diagram showing a management device 100A of a body posture change determination system according to an embodiment of the present disclosure; FIG. FIG. 9 is a flow chart showing the operation of the posture change determination system 1 associated with the management device 100A of FIG. 8. FIG. FIG. 9 is a time chart showing an example of determination of alert output time in the alert output unit 154 of FIG. 8; FIG. 1 is a functional block configuration diagram showing a management device 100B of a body posture change determination system according to an embodiment of the present disclosure; FIG. It is a schematic diagram which shows the storage example of care plan DB142 of FIG. FIG. 12 is a time chart showing an example of determination of alert output time in the alert output unit 154 of FIG. 11; FIG. 1 is a block configuration diagram showing a body posture change determination system according to an embodiment of the present disclosure; FIG. 7 is a functional block configuration diagram showing a computer 700 according to an embodiment of the present disclosure; FIG.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be noted that the embodiments described below do not unduly limit the content of the present disclosure described in the claims. Also, not all the components shown in the embodiments are essential components of the present disclosure.

(Embodiment 1)
<Configuration>
FIG. 1 is a functional block configuration diagram showing a posture change determination system 1 according to Embodiment 1 of the present disclosure. This body position change determination system 1 is mainly used in medical institutions, nursing care facilities, etc., to memorize changes in body position, and determine the body position for long-term bedridden persons (hereinafter referred to as "bed-bed persons") who have difficulty turning over on their own. It is a system that manages the time for exchange. Posture change is to change the direction of the body of a bedridden person or to assist him in doing so, and it is necessary to do so periodically at intervals of a predetermined time (for example, two hours). In addition, the change in posture is a concept that includes changing the direction of the body (orientation) by rolling over on one's own, in addition to the above-described change in posture. In general, the target person for the position change is a bedridden person who has difficulty turning over on their own, so other body movements (movements of a part of the body such as moving the arm) and the position change are combined. A distinction is possible. This posture change determination system 1 is a system that manages the time from one posture change to the next posture change, and outputs a notification when the time has elapsed.

The posture change determination system 1 has a management device 100, a detection device 200, and a network NW. The management device 100 and the detection device 200 are interconnected via a network NW. The network NW is a communication network for communication, and non-limiting examples include the Internet, an intranet, a LAN (Local Area Network), a WAN (Wide Area Network), a wireless LAN (WLAN), a wireless WAN ( Wireless WAN (WWAN), virtual private network (VPN) and other communication networks. In addition, the management device 100 and the detection device 200 may be directly connected by a USB (Universal Serial Bus) cable or the like as an example without limitation.

The management device 100 receives the signal of the vibration caused by the bedridden person from the detection device 200, stores the change in body position, determines whether or not the body position has been changed, stores the time, and notifies when a predetermined time has elapsed. As a non-limiting example, it is composed of a computer (desktop, laptop, tablet, etc.) that provides various web services, a device including a server device, and the like. Note that the server device is not limited to a server device that operates alone, and may be a distributed server system or a cloud server that operates cooperatively by communicating via a network NW.

The detection device 200 is a device for detecting vibration when a person changes positions or when the person gets up, and is configured by a sensor or the like as an example and not a limitation. This detection device 200 is attached to bedding such as a bed on which a bedridden person lies.

The management device 100 includes a communication section 110 , a display section 120 , an operation section 130 , a storage section 140 and a control section 150 .

The communication unit 110 is a communication interface for performing wired or wireless communication with the detecting device 200 via the network NW, and any communication protocol may be used as long as mutual communication can be performed. The communication unit 110 performs communication using a communication protocol such as TCP/IP (Transmission Control Protocol/Internet Protocol) as an example and not a limitation.

The display unit 120 is a user interface used to display operation contents input by a user who operates the management device 100, for example, staff members of a medical institution, a nursing care facility, or the like, and contents transmitted from the detection device 200. Rather, as an example, it is composed of a device including a liquid crystal display, a touch panel, a touch display, and the like.

The operation unit 130 is a user interface used by a user who operates the management device 100 to input operation instructions, and includes devices including a keyboard, a mouse, a touch panel, and a touch display, for example and not limitation.

The storage unit 140 stores programs for executing various control processes and functions in the control unit 150, input data, and the like. Memory), etc., and storage including HDD (Hard Disk Drive), SSD (Solid State Drive), flash memory, and the like. The storage unit 140 also stores a position change time DB 141 . Further, the storage unit 140 temporarily stores data communicated with the detection device 200 and data generated in each process described later.

Although illustration is omitted, the position change time DB 141 stores the time when it is determined that the position of the bedridden person has been changed for each bedridden person. This is because it is necessary to store the time at which the previous position change was performed in order to manage the time from the position change to the next position change. The time at which the position change was performed stored in the position change time DB 141 may be only the immediately preceding time, or may store all the times at which the position change was performed in the past.

The control unit 150 controls the overall operation of the management device 100 by executing a program stored in the storage unit 140. As examples, not limitation, a CPU (Central Processing Unit), MPU (Micro Processing Unit), GPU (Graphics Processing Unit), Microprocessor, Processor core, Multiprocessor, ASIC (Application-Specific Integrated Circuit), FPGA (Field Programmable Gate Array), etc. consists of As functions of the control unit 150 , a signal receiving unit 151 , a position change determination unit 152 , a position change time storage unit (position change storage unit) 153 , and an alert output unit (notification unit) 154 are provided. The signal receiving unit 151 , the position change determination unit 152 , the position change time storage unit 153 , and the alert output unit 154 are activated by a program stored in the storage unit 140 and executed by the management device 100 .

The signal receiving unit 151 receives a detection signal from a sensor included in the detecting device 200 from the detecting device 200 via the communication unit 110 . The sensing signals include, by way of example and not limitation, time-series waveform signals indicative of changes in voltage or current.

Further, the signal receiving unit 151 decomposes the detection signal into various periodic signals and performs Fourier transform to extract a predetermined periodic signal. This is because the detection signal, which is a waveform signal, contains noise, so that correct determination can be made in subsequent processing. Therefore, when the noise is small enough to allow determination of the required signal, Fourier transform may not be performed.

The position change determination unit 152 determines whether or not the bedridden person has changed positions based on the detection signal received by the signal receiving unit 151 and subjected to Fourier transform. For example, since the signal detected by the sensor for vibration due to position change is larger than the signal for other vibrations detected by the sensor, the position change determination unit 152 can detect that the position has been changed. . Here, when the signal detected by the sensor is large, it is when the bedding swings (displacement) in the vertical direction due to vibration is large, and this generally changes according to the magnitude of the load that causes the vibration. be. Therefore, when the body is changed, substantially the whole body is moved, whereas when a part of the body such as an arm is moved, the magnitude of the vibration is different.

Specifically, for example, when the person is stably sleeping, the signal detected by the sensor is the pulsation of the person and the vibration caused by the movement of the diaphragm accompanying breathing. The vibration caused by breathing is, for example, about 1 Hz, and the vibration caused by breathing of the bedridden person is, for example, about 0.1 to 0.4 Hz. When the bedridden person changes his or her posture, such as rolling over, a signal level with frequency characteristics different from pulsation and vibration due to respiration is detected for a certain period of time or longer. When a bedridden person coughs or consciously or unconsciously vibrates a part of the body, so-called shaking, data showing a lower signal level than a large body movement, that is, a change in body position, is detected. By storing such steady state data and large body motion data, a machine learning model is constructed that, by way of example and not limitation, determines the signal level sensed by the sensor. ” Data with a low signal level that cannot be determined as a large body motion is determined as a small body motion. On the other hand, the vibration due to the change in body position of the bedridden person or the change of body position by the caregiver is as strong as 2 to 8 times the signal level of small body movements, and lasts for about 2 seconds to 3 minutes. The body position change determination unit 152 determines that this signal indicates a large body motion, and determines that the signal when the body position has been changed indicates a large body motion.

In addition, the body position change determination unit 152 may determine the body orientation (orientation) of the bedridden person. For example, by analyzing a sensor-detected signal of vibration caused by a person's position change, it is possible to determine the orientation of the person's body at that time. Based on this information, an alert output unit 154, which will be described later, instructs an alert output unit 154 to change positions so that, for example, if the bedridden person is currently facing to the right, the position is changed so as to turn to the left. You can notify me. In general, changing the position means changing to the left if the person is facing right, and changing the position to the right if the person is facing left. make it possible.

The position change time storage unit 153 stores the detection signal determined by the position change determination unit 152 that the position change has been performed in association with the position change of the bedridden person. For example, the time at which the position was changed is stored in the position change time DB 141 as the time at which the position was changed. When the time stored in the posture change time DB 141 is only the immediately preceding time, it is updated to the latest time, and when all the past posture change times are stored, the time of the new posture change is stored.

The alert output unit 154 outputs, for example, an alert as a type of notification when a predetermined time (for example, two hours) has passed since the position change time storage unit 153 stored the time at which the position change was performed. Here, as an example and not a limitation, the alert output by the alert output unit 154 is a type of notification, and may simply notify the worker that it is time to change positions. For example, the alert output unit 154 causes the display unit 120 to display the information (name, etc.) of the person in bed and the information (room number, bed number, etc.) of the bed on which the person is lying in red on the display unit 120. display a warning such as Also, the alert output unit 154 may output an audio alert, and the management device 100 may include an audio output device for that purpose, such as a speaker.

In addition, the alert output unit 154 may output, for example, multiple levels of alerts. It is also possible to display a warning such that a warning is displayed in red on the display unit 120 when two hours have passed. In the case of alert output by voice output, the volume of voice may be increased as time elapses.

The detection device 200 includes a communication section 210 , an operation control section 220 and a vibration sensor 230 .

The communication unit 210 is a communication interface for performing wired or wireless communication with the management apparatus 100 via the network NW, and any communication protocol may be used as long as mutual communication can be executed. The communication unit 210 performs communication using a communication protocol such as TCP/IP as an example and not a limitation.

The operation control unit 220 has a function of controlling the operation of the vibration sensor 230 and transmitting a detection signal to the management apparatus 100 via the communication unit 210. Configured.

The vibration sensor (sensor) 230 is a sensor that detects vibrations such as when a bedridden person changes positions, rolls over by himself/herself, or when a bedridden person gets up. It is composed of a piezoelectric element or the like that converts the vibration into an electric signal by the piezoelectric effect. This vibration sensor 230 is arranged on the bedding such as the mattress of the bed on which the bedridden person lies, at the position where the bedridden person lies down. Note that the vibration sensor 230 may be any sensor that detects the vibration of a bedridden person, and may be composed of a Doppler sensor, a mat sensor, or the like.

FIG. 2 is a plan view showing an example in which the vibration sensor 230 of FIG. 1 is arranged on the mattress M of the bed B. As shown in FIG. For example, a plurality of vibration sensors 230 are arranged on the mattress (bedding) M of the bed B shown in FIG. The vibration sensor 230 is formed in the shape of an elongated sheet, is arranged on the upper surface side of the mattress M, is covered with a sheet, a cushioning material, or the like and is embedded so as not to come into direct contact with the bedridden person. The reason why it is arranged so as not to directly touch the bedridden person is that there is a risk of electric shock or the like by touching the bedridden person, and the bedridden person may feel uncomfortable.

The layout of the vibration sensor 230 on the mattress M, as shown in FIG. are arranged in parallel along the width direction of the body of the bedridden person (vibration sensors 230a, 230b, 230c, 230d, 230e in order from the left), and vibration Two sensors 230 (vibration sensors 230f, 230g in order from the top) are arranged in parallel in the vertical direction of the bedridden person's body so that the longitudinal direction of the sensor 230 is along the width direction of the bedridden person's body. In addition, the bed B shown in FIG. 2 is directed upward toward the head of the bedridden person and downward toward the feet of the bedridden person.

The reason for this arrangement is that the five vibration sensors 230 on the side of the upper body of the lying person detect the position in the width direction on the mattress M of the lying person, thereby determining that the position has been changed. is. In addition, since it is conceivable that the person in bed changes positions without changing the position in the width direction on the mattress M, two vibration sensors 230 in the lower body of the person in bed detect vibrations larger than a predetermined amount. It is made possible to determine that the body positions have been changed.

<Process flow>
A process flow of an example of the posture change time management method executed by the posture change determination system 1 will be described with reference to FIG. 3 . FIG. 3 is a flow chart showing the operation of the posture change determination system 1 of FIG.

As the process of step S101, the detection signal detected by the vibration sensor 230 of the detection device 200 is transmitted to the management device 100 via the communication unit 210 by the operation control unit 220. Therefore, the signal reception unit 151 of the management device 100 It is received via the communication unit 110 . Further, in the signal receiving section 151, Fourier transform is performed on the received detection signal.

As the process of step S102, the position change determination unit 152 determines whether or not the bedridden person has changed positions from the detection signal received in step S101 and subjected to Fourier transform.

FIG. 4 is a schematic diagram showing an example of a state in which the bed B in FIG. 2 has a bed person H lying face up. The bedridden person H on the mattress M shown in FIG. At this time, since the body of the lying person H is placed on the vibration sensors 230b, 230c, 230d, 230f, and 230g, these vibration sensors detect the vibration of the lying person H, specifically the pulsation of the lying person H. and vibrations caused by breathing. For example, the vibration sensors 230c and 230f on which the vicinity of the center of gravity of the bedridden person H is placed detect a strong signal level, and the signal level of the detection signal by the vibration sensor at this time is strong. Sensors 230b, 230d and 230g detect weak signal levels.

FIG. 5 is a schematic diagram showing an example of a state in which the bedridden person H in FIG. 4 changes positions to face left. If the bedridden person H shown in FIG. H is lying on the left side in the width direction of the body, facing the left direction. At this time, since the body of the lying person H is placed on the vibration sensors 230a, 230b, 230f, and 230g, these vibration sensors detect the vibration of the lying person H. As for the signal level of the detection signal by the vibration sensor at this time, for example, the vibration sensors 230a, 230b, and 230f on which the vicinity of the center of gravity of the bedridden person H is placed detect a strong signal level.

At the time of this posture change, the vibration sensor 230a did not detect vibration, but it detects a new vibration by detecting a strong signal level. Also, the vibration sensor 230c, which had detected vibration, is now in a state where it does not detect vibration. Furthermore, the vibration sensors 230b, 230f, and 230g are in a state of detecting vibration both before and after the position change, but the vibration sensor 230b detects a strong signal level. By detecting such a change in signal level, a large vibration caused by the movement of the body of the bedridden person H is detected. Based on such a change in the detection signal, the body position change determination unit 152 determines body position change of the bedridden person H. FIG.

FIG. 6 is a schematic diagram showing another example of a state in which the bedridden person H in FIG. 4 changes positions to face left. If the bedridden person H shown in FIG. , the person in bed H is lying in the center in the width direction of the body, facing leftward. At this time, since the body of the lying person H is placed on the vibration sensors 230b, 230c, 230d, 230f, and 230g, these vibration sensors detect the vibration of the lying person H. For example, the vibration sensors 230c and 230f on which the vicinity of the center of gravity of the bedridden person H is placed detect a strong signal level, and the signal level of the detection signal by the vibration sensor at this time is strong. Sensors 230b, 230d and 230g detect weak signal levels.

During this position change, the vibration sensors 230b, 230c, 230d, 230f, and 230g are in a state of detecting vibration both before and after the position change. . Thus, even if the position of the body of the lying person H does not move before and after the position change, the position change determination unit 152 determines the position change of the lying person H based on the change in the detection signal.

As the process of step S103, the position change time storage unit 153 stores the time of the detection signal determined as the position change in step S102 in the position change time DB 141 as the time when the position change was performed.

As the process of step S104, the alert output unit 154 determines whether or not a predetermined period of time (for example, two hours) has passed since the position change time stored in step S103.

FIG. 7 is a time chart showing an example of determining the alert output time in the alert output unit 154 of FIG. A time chart T1 shown in FIG. 7 shows a case where the time at which the position exchange was performed stored in step S103 is "14:51" and the predetermined time is two hours. In this way, since "16:51" is two hours after the time when the position change is performed, this time is the reference time for determining whether or not the predetermined time has passed.

As the process of step S105, the alert output unit 154 outputs an alert. The alert at this time is, for example, a warning display displayed in red on the display unit 120, or an alert output by sound. As a result, workers such as staff members of medical institutions, nursing care facilities, etc. can recognize that there is a bedridden person who has not changed positions for more than a predetermined period of time since the positions were changed.

<effect>
As described above, in the posture change determination system and the posture change determination method according to the present embodiment, a detection device equipped with a vibration sensor that detects the vibration of a bedridden person is attached to the mattress of the bed, and the position change determination unit detects the vibration. It is determined from the detection signal of the sensor whether or not the bedridden person has changed positions, and if a predetermined time has passed since the time when the position was changed, a predetermined alert is output by the alert output unit. A worker such as a staff member can recognize that there is a bedridden person who has not changed his/her position yet after a predetermined period of time has elapsed since the position change. As a result, it is possible to prevent omission of the work of changing the body position, so that the bedsore of the bedridden person can be prevented.

In addition, on the mattress of the bed on which the bedridden person lies, at the position where the upper body of the bedridden person is placed, a plurality are arranged in parallel in the width direction of the body of the bedridden person, and at the place where the lower body of the bedridden person is placed. , are arranged in parallel in the vertical direction of the body of the bedridden person, so by detecting the position in the width direction on the mattress of the bedridden person, it is possible to determine that the body position has been changed. By detecting the vibration, it becomes possible to determine that the body position has been changed.

Further, the signal receiving unit performs Fourier transform for decomposing the received detection signal into various periodic signals and extracting a predetermined periodic signal, thereby detecting a necessary signal from the detection signal, which is a waveform signal. becomes possible.

(Embodiment 2)
FIG. 8 is a functional block configuration diagram showing a management device 100A of the posture change determination system 1 according to Embodiment 2 of the present disclosure. This management device 100A receives a signal of vibration by the bedridden person from the detection device 200, stores the change in body position, determines whether or not the body position has been changed, stores the time, and when a predetermined time has elapsed, It is the same as the management device 100 according to the first embodiment in terms of outputting an alert, but the control device 150 includes a biological information acquisition unit 155 and a sleep state acquisition unit 156 as functions of the control unit 150. is different from the management device 100 according to .

In this embodiment, the biometric information of the bedridden person is acquired from the detection signal received from the vibration sensor 230, the sleeping state of the bedridden person is acquired based on the biometric information, and a predetermined time has passed since the position exchange was performed. , to output alerts at optimal times based on biometric information and/or sleep status. This is because, for example, it is painful for a bedridden person to have their sleep disturbed due to a position change, and if the optimal time can be grasped, the position change should be performed at that time.

The biological information acquisition unit 155 acquires the biological information of the bedridden person from the detection signal received by the signal reception unit 151 and subjected to Fourier transform. The biometric information acquired by the biometric information acquiring unit 155 includes, for example and not limitation, the respiration and/or heartbeat of the bedridden person. Breathing and heartbeat of a person are usually periodic motions with a certain frequency and are accompanied by vibrations of the body. Therefore, since it can be detected by the vibration sensor 230, such biological information can be obtained by extracting a periodic signal considered to correspond to respiration or heartbeat from the periodic signal decomposed by Fourier transforming the detection signal. to get

The sleep state acquisition unit 156 acquires the sleep state of the bedridden person from the biometric information acquired by the biometric information acquisition unit 155 . The sleep states acquired by the sleep state acquisition unit 156 include REM sleep, which is light sleep, and non-REM sleep, which is deep sleep, as examples, not limitation. In general, human sleep is such that REM sleep and non-REM sleep occur alternately and periodically. In addition, it is possible to determine whether a person is in REM sleep or non-REM sleep based on the breathing and heartbeat of a sleeping person. Therefore, sleep information is acquired based on breathing and heart rate information. Acquisition of sleep information at this time may be realized by performing machine learning of biometric information of a large number of bedridden persons as an example and not a limitation.

The alert output unit 154 according to the present embodiment stores the time when the position change time storage unit 153 changed positions, and when a predetermined time (for example, two hours) has passed, the biological information acquisition unit 155 acquires Based on the biological information, the sleep state acquired by the sleep state acquiring unit 156, or both, it is determined whether or not the time is optimal, and an alert is output when the time is optimal. The optimal time based on biological information is determined, for example, by determining whether the person is in an active state (awake state) or in a sleeping state, and the time when the person is in an active state is defined as the optimal time. This is because, for example, it is painful for a bedridden person to have their sleep disturbed due to a position change, and the position change should be performed at a time when the physical burden is less.

In addition, the optimal time based on the sleep state is determined, for example, whether the person is in REM sleep or non-REM sleep, and the time of REM sleep is determined as the optimal time. This is because, for example, it is painful for a bedridden person to be woken up in non-REM sleep, which is deep sleep, in order to change positions, and the change of positions should be performed at a time when the physical burden is less. Other configurations are the same as those of the first embodiment.

<Process flow>
With reference to FIG. 9, the processing flow of an example of the posture change determination method executed by the posture change determination system 1, which differs from the first embodiment, will be described. FIG. 9 is a flow chart showing the operation of the body posture change determination system 1 associated with the management device 100A of FIG.

As the process of step S111, which is the subsequent process of step S103, the biological information acquisition unit 155 of the management apparatus 100A obtains the biological information of the bedridden person, for example, Capture respiration and/or heart rate.

As the process of step S112, the sleep state acquisition unit 156 acquires information indicating the sleep state of the bedridden person, for example, REM sleep, which is light sleep, or non-REM sleep, which is deep sleep, from the biological information acquired in step S111. be.

As the processing of step S104, which is the subsequent processing of step S112, the alert output unit 154 determines whether or not a predetermined time has passed from the time when the position change was performed stored in step S103. Also, based on the biological information acquired by the biological information acquisition unit 155, the sleep state acquired by the sleep state acquisition unit 156, or both, it is determined whether or not it is the optimal time.

FIG. 10 is a time chart showing an example of alert output time determination in the alert output unit 154 of FIG. A time chart T1 shown in FIG. 10 shows a case where the time at which the position exchange was performed stored in step S103 is "21:51" and the predetermined time is two hours. Also, the time chart T2 shows the sleep state acquired in step S112, and it is determined that the time when REM sleep occurs is the optimal time. In this way, two hours after the time of the position exchange is "23:51", but since that time is the time of non-REM sleep, the time when the change to REM sleep from this time is the optimal time. is determined to be

According to the present embodiment, in addition to the effects of the first embodiment, the biological information acquisition unit acquires the biological information of the bedridden person, the sleep state acquisition unit acquires the sleep state of the bedridden person, and the biological information or the sleep state, Alternatively, based on both of them, it is determined whether or not the time is optimal, and an alert is output. As a result, it becomes possible for the bedridden person to change positions at a time when the physical burden is less.

(Embodiment 3)
FIG. 11 is a functional block configuration diagram showing a management device 100B of the posture change determination system 1 according to Embodiment 3 of the present disclosure. This management device 100B receives a signal of vibration by the bedridden person from the detection device 200, stores the change in body position, determines whether or not the body position has been changed, stores the time, and when a predetermined time has passed, Although it is the same as the management device 100 according to the first embodiment in terms of outputting an alert, the storage unit 140 stores the nursing care plan DB 142 instead of the position change time DB 141 according to the first embodiment, and the control unit 150 It differs from the management device 100 according to the first embodiment in that it has a nursing care plan storage unit 157 as a function.

In this embodiment, instead of outputting an alert after a predetermined time has elapsed from the time when the position change was actually performed, a nursing care plan is formulated in advance, and a predetermined time from the scheduled position exchange time specified in the nursing care plan is output. Output an alert when the time elapses. In medical institutions and nursing homes, etc., the scheduled time for changing positions is set in advance, and if the time for changing positions is optimal based on biological information and sleep conditions, there will be a discrepancy between the scheduled time for changing positions. This is because the burden on the operator will increase if the position change cannot be performed as planned.

The nursing care plan DB 142 stores, as an example and not a limitation, information on a position change table, which includes information including the scheduled time and actual time of position change for each bedridden person, and the orientation of the body at the time of position change. In addition to these pieces of information, the time of medication, temperature measurement, blood sampling, etc. may be stored according to the symptoms of the bedridden person.

FIG. 12 is a schematic diagram showing a storage example of the care plan DB 142 of FIG. 11. As shown in FIG. The nursing care plan DB 142 includes information on the name of the resident and the position exchange table in association with the resident ID shown in FIG. 12 and corresponding to the column names of the nursing care plan DB 142 shown in FIG.

A resident ID is identification information that uniquely identifies information on a resident (bedridden person) of a medical institution, nursing facility, or the like. The resident name is the attribute information of the resident, and indicates the name as an example. The position exchange table stores information on the scheduled time of the position exchange, the actual time of the position exchange, and the orientation of the body when the position exchange is performed. Position exchange is performed according to the time and body direction specified in this position exchange table.

The nursing care plan storage unit 157 stores, for each bedridden person, the scheduled time for position change and the information on the orientation of the body when changing the position, which is defined in the care plan formulated in advance at a medical institution, nursing care facility, etc. do. Other configurations are the same as those of the first embodiment.

<Process flow>
The flow of processing according to the third embodiment is the same as the flow chart according to the second embodiment shown in FIG. 9 except for the processing content of step S104. Regarding the flow of processing of an example of the determination method, processing different from that of the second embodiment will be described.

As the process of step S<b>104 , the alert output unit 154 determines whether or not a predetermined period of time has passed from the position change scheduled time stored in the nursing care plan DB 142 . Also, based on the biological information acquired by the biological information acquisition unit 155, the sleep state acquired by the sleep state acquisition unit 156, or both, it is determined whether or not it is the optimal time.

FIG. 13 is a time chart showing an example of determining the alert output time in the alert output unit 154 of FIG. A time chart T1 shown in FIG. 13 shows a case where the pre-stored scheduled time for position change is "23:00" and the predetermined time is two hours. Also, the time chart T2 shows the sleep state acquired in step S112, and it is determined that the time when REM sleep occurs is the optimal time. In this way, two hours after the scheduled position change time is "1:00", but since that time is in the time zone of non-REM sleep, the time when it changes to REM sleep from this time zone is the optimal time. is determined.

According to this embodiment, in addition to the effects of Embodiments 1 and 2, information on the scheduled time for changing positions and the information on the orientation of the body when changing positions, which are defined in the position change table by the nursing care plan storage unit, can be obtained. The information is stored, and the alert output unit determines whether or not a predetermined period of time has elapsed from the scheduled position change time. As a result, since the alert is output based on the predetermined position change scheduled time, there is no deviation from the position change scheduled time, and the burden on the operator can be reduced.

(Embodiment 4)
FIG. 14 is a block configuration diagram showing a postural change determination system 1C according to Embodiment 4 of the present disclosure. This postural change determination system 1C is similar to the postural change determination system 1 according to Embodiment 1 in that it manages the time for changing the position of a bedridden person who has difficulty turning over on their own. It differs from the posture change determination system 1 according to the first embodiment in that it has a device 100C, a detection device 200, a network NW, and a mobile terminal 300. FIG.

In the present embodiment, the alert output unit of the management device outputs the alert to the mobile terminal as an output destination. Workers such as staff members in medical institutions, nursing care facilities, etc. are busy and have limited time to look at the display section of the management device.

The mobile terminal 300 is configured by a mobile terminal including a smart phone and a mobile phone as an example and not a limitation. The mobile terminal 300 displays, for example, a pop-up of the alert transmitted from the management device 100C so that the worker can recognize that the alert is output. Also, the mobile terminal 300 may output an audio alert. Other configurations and processing flows are the same as in the first embodiment.

According to this embodiment, in addition to the effects of Embodiments 1 to 3, since the mobile terminal is provided and the alert is output by the mobile terminal, it is possible to reliably recognize that the alert is being output. As a result, it is possible to prevent the work omission of the posture change.

(Embodiment 5 (Program))
FIG. 15 is a functional block configuration diagram showing an example of the configuration of a computer (electronic calculator) 700. As shown in FIG. A computer 700 includes a CPU 701 , a main memory device 702 , an auxiliary memory device 703 and an interface 704 .

Here, the signal receiving unit 151, the position exchange determination unit 152, the position exchange time storage unit 153, the alert output unit 154, the biological information acquisition unit 155, the sleep state acquisition unit 156, and the nursing care plan storage unit according to Embodiments 1 to 4 The details of the control program (posture change determination program) for realizing each function constituting 157 will be described. These functional blocks are implemented in computer 700 . The operations of these components are stored in the auxiliary storage device 703 in the form of programs. The CPU 701 reads out the program from the auxiliary storage device 703, develops it in the main storage device 702, and executes the above processing according to the program. Further, the CPU 701 secures a storage area corresponding to the above-described storage unit in the main storage device 702 according to the program.

Specifically, in the computer 700, the computer 700 includes a signal receiving step of receiving a detection signal from a sensor that detects the vibration of the bedridden person; a position exchange determination step for determining whether or not the position exchange has been performed; a position exchange time storage step for storing the time when the bedridden person performed the position exchange; and an alert output step of outputting an alert.

Note that the auxiliary storage device 703 is an example of a non-temporary tangible medium. Other examples of non-transitory tangible media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, etc. that are connected via interface 704 . Also, when this program is distributed to the computer 700 via a network, the computer 700 receiving the distribution may develop the program in the main storage device 702 and execute the above process.

Also, the program may be for realizing part of the functions described above. Furthermore, the program may be a so-called difference file (difference program) that implements the above-described functions in combination with another program already stored in the auxiliary storage device 703 .

Although the disclosed embodiments have been described above, they can be implemented in various other forms, and can be implemented with various omissions, substitutions, and modifications. These embodiments, modifications, omissions, substitutions and changes are included within the technical scope of the claims and their equivalents.

Reference Signs List 1, 1C position change determination system 100, 100A, 100B, 100C management device 110 communication unit 120 display unit 130 operation unit 140 storage unit 141 position change time DB 142 care plan DB 150 control unit 151 Signal receiving unit 152 Position exchange determination unit 153 Position exchange time storage unit 154 Alert output unit 155 Biological information acquisition unit 156 Sleep state acquisition unit 157 Nursing care plan storage unit 200 Detection device 210 Communication unit 220 Operation Control unit, 230 vibration sensor, 300 mobile terminal, NW network

Claims (9)

A postural change determination system comprising bedding and a management device for managing a postural change of a bedridden person lying on the bedding,
The bedding includes a sensor that detects vibration due to the change in the body position of the person lying on the bed,
The management device
a signal receiving unit that receives a detection signal from the sensor;
a biological information acquisition unit that acquires biological information of the bedridden person based on the received detection signal;
a position change determination unit that determines that the bedridden person has changed positions when the signal level of the received detection signal changes by a predetermined threshold or more and the change in the detection signal continues for a predetermined time or longer;
a sleep state acquisition unit that acquires the sleep state of the bedridden person based on the biometric information of the bedridden person;
a position change storage unit that stores the detection signal in association with the position change of the bedridden person;
a notification unit that outputs a predetermined notification when a predetermined time has passed since the position change time at which the bedridden person performed the position change ,
When a predetermined period of time has passed since the stored position change time, the notification unit notifies a predetermined time at an optimum time for the bedridden person based on the biological information and the sleep state obtained from the biological information. Posture change determination system that outputs The bedding comprises a plurality of the sensors,
The position change determination unit changes the vibration applied to one of the sensors from the detection signals from the plurality of sensors to vibration applied to the other sensor, and the vibration applied to the other sensor is a predetermined threshold value. 2. The posture change determination system according to claim 1, wherein when it is determined that the above is the case, it is determined that the bedridden person has changed positions. 3. The body position change determination system according to claim 1, wherein the body position change determination unit determines the orientation of the body of the bedridden person from the detection signal from the sensor. 4. The posture change determination system according to any one of claims 1 to 3, wherein said posture change storage unit stores said detection signal together with a record of said posture change time. 5. The postural change determination system according to claim 4 , wherein the biological information acquisition unit acquires information on respiration and/or heartbeat of the bedridden person based on a change in a predetermined frequency of the received detection signal. A nursing care plan storage unit that stores a scheduled position change time indicating a schedule for changing the position of the bedridden person,
5. The posture change determination system according to claim 4 , wherein the notification unit outputs a predetermined notification at an optimum time based on the sleep state when a predetermined time has passed from the stored scheduled time for position change. The posture change determination system according to any one of claims 1 to 6 , wherein the signal receiving unit performs Fourier transform for extracting a predetermined periodic signal from the received detection signal. A postural change determination method for managing a postural change of a bedridden person lying on bedding,
a signal receiving step of receiving a detection signal from a sensor, which is provided in the bedding and detects vibration caused by the change in the body position of the person lying in bed, performed by the signal receiving unit;
a biological information acquisition step of acquiring the biological information of the bedridden person based on the received detection signal, performed by the biological information acquisition unit;
A position change determining unit determines that the lying person has changed positions when the signal level of the received detection signal changes by a predetermined threshold value or more and the change in the detection signal continues for a predetermined time or longer. a determination step;
a sleep state acquisition step of acquiring the sleep state of the person in bed based on the biological information of the person in bed, performed by a sleep state acquisition unit;
a position change storage step of storing the detection signal in association with the position change of the bedridden person, performed by a position change storage unit;
a notification step of outputting a predetermined notification when a predetermined time has passed since the position change time of the bedridden person, performed by the notification unit ;
In the notification step, when a predetermined period of time has passed since the stored position change time, a predetermined notification is made at an optimum time for the bedridden person based on the biological information and the sleeping state obtained from the biological information. Posture change determination method that outputs A postural change determination program for managing a postural change of a bedridden person lying on bedding,
a signal receiving step of receiving a detection signal from a sensor provided in the bedding for detecting vibration caused by the change in the body position of the bedridden person;
a biological information acquisition step of acquiring biological information of the bedridden person based on the received detection signal;
a position change determination step of determining that the bedridden person has changed positions when the signal level of the received detection signal changes by a predetermined threshold or more and the change in the detection signal continues for a predetermined time or longer;
a sleep state acquisition step of acquiring the sleep state of the bedridden person based on the biometric information of the bedridden person;
a position change time storage step of storing the detection signal in association with the position change of the bedridden person;
A position change determination program for causing a computer to execute a notification step of outputting a predetermined notification when a predetermined time has passed since the position change time at which the bedridden person changed positions,
In the notification step, when a predetermined period of time has passed since the stored position change time, a predetermined notification is made at an optimum time for the bedridden person based on the biological information and the sleeping state obtained from the biological information. Posture change determination program that outputs .

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