JP2007135862A - Monitoring device for monitoring state of subject and monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-bed state monitoring device which increases reliability of understanding of body conditions by utilizing biological data of a subject in bed and enables accurate understanding of the body condition including body temperature information. <P>SOLUTION: The in-bed state monitoring device is equipped with an air mat placed on a bed of the subject, a pressure detecting means for detecting changes in internal pressure of the air mat, a means for measuring the biological data of the subject from the changes in the internal pressure of the air mat detected by the pressure detecting means, an IC tag which is attached to the subject and has a temperature measurement part, and a reading part for reading the information on the IC tag, and monitors the state of the subject from the biological data and the temperature information on the IC tag. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention measures the biological data such as heart rate, respiratory rate, body movement size, body temperature, etc. in bedtime, lying down, supine etc. of subjects such as elderly people, patients being treated, infants, etc. The present invention relates to a monitoring device and a monitoring system for monitoring the state of the diaper, and a diaper used for the monitoring device.

In recent years, the population of elderly people tends to increase, and it is changing to a so-called aging society. For this reason, the burden of care for the elderly increases, especially in the case of home care, and it is necessary to always pay attention, and there is an immeasurable amount of effort when the family cares at night. As a result, an excessive burden is imposed on the caregiver, which is a big social problem.

Also, in hospitals and nursing homes, nurses and nurses are not always accompanied by patients or caregivers (subjects) during bedtime, lying down, or lying on their backs. Currently, we are dealing with this by reporting the health status of patients.

In recent years, even if elderly people have a sudden fever such as influenza in nursing homes, the information may be delayed and become serious. Even if an infant has a sudden fever such as influenza at home, the information may be delayed and become serious.

Under such circumstances, as a method of non-invasively, ie, unconstrained and continuously grasping the health status of the cared person without giving physical and mental burden to the cared person, the cared person (subject) A technique has been proposed in which an air mat is laid under the body of the subject and the subject's heart rate, respiration rate, number of snoring times, number of times of turning, etc. are measured based on a change in pressure applied to the air mat (Patent Document 1). In addition, a home dock system that checks information such as blood pressure, pulse, and body temperature every day while staying at home and displays a trend is also proposed (Patent Document 2).

However, it is necessary to manually input and transmit data such as blood pressure, pulse, body temperature and the like each time measurement is performed. Also, a management system has been proposed that can quickly acquire owner information and contact information by collating with an ID code using a non-contact type IC tag embedded in a collar (Patent Document 3). Also, a bearing abnormality inspection system has been proposed using an IC tag integrated with a temperature sensor (Patent Document 4). However, a system for monitoring body temperature data of a living body without giving a physical and mental burden to a subject (an elderly person, a patient being treated, an infant) or a caregiver has not yet been proposed.
JP 2002-52010 A JP 2003-56247 A JP 2004-357589 A JP 2005-32256 A

However, patients who are afflicted, especially elderly people and infants, may be late to notice even if there is a sudden fever due to an infection such as influenza at night, which may be too late.

The object of the present invention is to improve the reliability of grasping the physical condition using the biological data of a subject who is in bed or resting (such as lying down or lying on his back), so that the accurate state of the subject or cared person can be obtained even at night. An object of the present invention is to provide a state monitoring device and a monitoring system that can be grasped.

In order to solve the above-described problems, the monitoring device of the present invention is an IC having an air mat installed on a subject's bed, biological information detecting means provided on the air mat, and a temperature measuring unit mounted on the subject. A tag and a reading unit for reading information on the IC tag are provided, and the state of the subject is monitored based on the biological data and the temperature information on the IC tag. In addition, the monitoring device of the present invention includes an air mat installed on the subject's bed, a pressure detection unit that detects a change in the internal pressure of the air mat, and a subject's internal pressure change detected by the pressure detection unit. A means for measuring biological data, an IC tag having a temperature measurement unit attached to the subject, and a reading unit for reading information on the IC tag are provided. Based on the biological data and the temperature information of the IC tag, the subject's It is characterized by monitoring the state. Also, an air mat installed on the subject's bed, a pressure detection means for detecting a change in the internal pressure of the air mat, and a measurement means for measuring the biological data of the subject based on the change in the internal pressure of the air mat detected by the pressure detection means And an IC tag having a temperature measuring unit attached to the subject, and a reading unit for reading the information of the IC tag, and the normal data obtained in advance and the biological data and IC tag temperature information for a predetermined time. The condition of the subject is monitored in comparison with the biological data. In addition, the monitoring system of the present invention includes an air mat installed on the subject's bed, a pressure detection unit that detects a change in the internal pressure of the air mat, and a subject's internal pressure change that is detected by the pressure detection unit. A measuring means for measuring biometric data; an IC tag having a temperature measuring unit attached to the subject; and a reading unit for reading information on the IC tag. A monitoring device that monitors the condition of the subject in comparison with the obtained normal biological data, and the bedtime of the subject in comparison with the biological data for a predetermined time and the normal biological data obtained in advance. It is characterized by comprising a terminal device for monitoring the state, and a management control device installed at the management site and / or medical site so as to be able to transmit with the terminal device. Further, the computer-readable storage medium according to the present invention includes a pressure detection process program for detecting a change in the internal pressure of the air mat installed in the bed of the subject by the pressure detection means, and an air mat detected by the pressure detection means. A program for measuring biological data of a subject based on a change in internal pressure by a measuring means, a program for reading temperature information of an IC tag having a temperature measuring unit attached to the subject, and a living body for a predetermined time The condition of the subject is monitored by comparing the data and temperature information of the IC tag with normal biological data obtained in advance, and compared with biological data for a predetermined time and normal biological data obtained in advance The program of the process to perform is memorize | stored. Moreover, it is a diaper provided with the IC tag which has the temperature measurement part used for the above.

In the present invention, the reliability of grasping the physical state using the biological data of the subject who is sleeping or resting (such as lying down or lying on the back) is improved, and there is no burden on the subject, the caregiver, or the caregiver at night. The biological state including accurate body temperature information can be grasped.

FIG. 1 shows an embodiment of the present invention, and shows an outline of an air mat, a subject, and a monitoring device installed in a nursing facility or at home. FIG. 2 is a block diagram of the terminal device 5 forming the monitoring device, and FIG. 3 is a block diagram of an IC tag (RFID) having a temperature measurement unit. FIG. 4 is an external view (b) showing a diaper (b) worn by a subject and a wearing state thereof. It is needless to say that the present invention is not limited to the examples and can be changed as appropriate.

In FIG. 1, reference numeral 1 denotes a room such as a hospital, a nursing facility, or a home. A dedicated air mat 2 for measuring biometric data is installed on a bed 3, and a terminal device 5 having a function of a personal computer or the like via the air tube 4 and data. The measurement dedicated air mat 2 is connected to transmit the pressure change of the data measurement dedicated air mat 2 to the terminal device 5.

<Specific configuration of monitoring system>
The subject (old person, infant, etc.) P is a diaper (pants) 200 on the biological data measurement dedicated air mat 2 in a normal state (recumbent, supine) (see FIGS. 4 (a) and 4 (b)). And go to bed. The diaper 200 includes a trunk opening 201 provided with an elastic member, a leg opening 202 provided with an elastic member, an absorbing member (not shown) that absorbs urine, and the like. Prepare. The diaper 200 is not limited to a pants shape, but may have other shapes. In addition, the IC tag 100 having the temperature measuring unit may be surrounded by an enclosing member including a hook-and-loop fastener and the like so as to be detachable. The terminal device 5 includes a pressure sensor that detects a change in pressure, a control monitoring device that processes the detection signal and transmits it to the management site / medical site 7 via a dedicated line such as a LAN or an information communication network 8 such as the Internet, An IC tag reading unit 34 is provided. The terminal device 5 and the management computer (control device) 11 of the management site / medical site 7 can transmit information to each other via the information communication network 8. The management computer (control device) 11 includes a storage unit, a display unit, an input unit, an external communication unit, and the like. Note that the IC tag 100 having the temperature measurement unit may be inserted into the ear, or may be attached to an arbitrary location on the body surface to acquire body temperature information at a plurality of locations. In this case, an anti-coregion type IC tag is used, which enables reading of body temperature information at the same time.

A server (data processing device) 9 is installed at the management site / medical site 7 and is associated with the ID of the subject P to store biological information such as pulse, respiration, blood pressure, body temperature, blood oxygen saturation, blood sugar, etc. Measurement data collection, aggregation, data analysis, and the like may be performed. In addition, a management personal computer 11 is installed on the desk of the attending doctor 10, and the attending doctor 10 grasps and monitors the physical state of the subject P as needed, receives an abnormal report of the subject in an emergency, It may be possible to give instructions to the nurse's waiting room as needed, or to make contact with a handy nurse call.

In FIG. 2, reference numeral 40 denotes a control unit (CPU) that executes a predetermined processing flow based on a computer-readable program stored in the ROM 42, the RAM 43, etc., predetermined conditions, and the like. Reference numeral 36 denotes a display unit, and 44 denotes a storage unit that stores biological information such as detected body temperature, heartbeat, and respiration. Reference numeral 20 denotes a fine differential pressure sensor, and reference numeral 21 denotes an absolute pressure sensor. The internal pressure of the air mat 2 is input to the fine differential pressure sensor 20 and the absolute pressure sensor 21 via the air tube 4. Since vibration due to the body of the subject P is transmitted to the air mat 2, the internal pressure of the air mat 2 changes. The fine differential pressure sensor 20 detects the pressure fluctuation, and the absolute pressure sensor 21 detects the absolute pressure of the internal pressure of the air mat 2. The absolute pressure sensor 21 is provided to detect whether the subject P is on the air mat 2.

As the fine differential pressure sensor 20, for example, a condenser microphone type differential pressure gauge that detects a differential pressure by detecting a change in capacitance between a pressure-receiving surface that receives a change in pressure and a counter electrode is used. The condenser microphone type differential pressure gauge can detect minute pressure fluctuations in the air mat 2.

The detection signal of the fine differential pressure sensor 20 is given to a gain control unit 31 that constitutes the monitoring control device 30. The gain control unit 31 adjusts the level of the detection signal of the fine differential pressure sensor 20 to a signal level within a predetermined range. Since the strength of vibration such as heartbeat and respiration transmitted to the air mat 2 varies depending on the posture of the subject P, the intensity (level) of the output signal of the fine differential pressure sensor 20 varies. The gain control unit 31 adjusts the gain so that a signal level that varies depending on the posture becomes a signal of a predetermined level, and outputs the signal to the heartbeat filter 32 and the respiratory filter 33. Further, the gain value of the gain control unit 31 is added to the posture determination unit 36. By applying the output signal of the differential pressure sensor 20 converted to a predetermined level by the gain control unit 31 to the heartbeat filter 32 and the respiratory filter 33, the heartbeat signal and the respiratory signal are detected from the heartbeat filter 32 and the respiratory filter 33. The biological data of the person P is obtained. The biological data of the subject P obtained from the heartbeat filter 32 and the respiratory filter 33 is converted into a digital signal by the A / D conversion unit 35 and input to the data processing unit 37. Moreover, temperature information is intermittently received by the IC tag reading unit 34 (for example, 10 to 30) from the IC tag 100 with a temperature sensor (see FIG. 4A) attached to the inner side of the diaper 200 attached to the subject P. Read every minute). The IC tag reader 34 transmits an electromagnetic wave of 13.56 MHz, and the signal is received by the IC tag 100 with the temperature sensor via the antenna, and the temperature (body temperature) information by the temperature sensor 106 (in this embodiment, the subject P Body temperature information in the vicinity of the abdomen) is read from the IC tag 100 with a temperature sensor. The data processing unit 37 performs various arithmetic processes on the input biological data and monitors the state of the subject P. The various types of calculation processing of the biological data include pattern comparison with the normal biological data of the subject P. The data processing unit 37 performs arithmetic processing when the absolute pressure sensor 21 detects that the subject P is on the air mat 2.

Further, the gain value of the gain control unit 31 is added to the posture determination unit 36. Since the level of the detection signal of the fine differential pressure sensor 20 that detects the internal pressure of the air mat 2 differs depending on the posture of the subject P, the gain control unit 31 adjusts the gain.

<Configuration of IC tag>
In FIG. 3, reference numeral 101 denotes a RAM which is a computer-readable storage medium that stores a program that receives a signal from the IC tag reading unit 34 and operates the logic unit 110 in a predetermined flow. An EEPROM 102 stores an offset value, a temperature correction value, and the like corresponding to each temperature sensor 106. Also, body temperature information can be stored. The logic unit 110 may be a CPU that can control a more complicated processing flow.

As the temperature sensor 106, a semiconductor type that outputs analog almost linearly with respect to temperature change, can be miniaturized and integrated with an IC tag, and has a temperature resolution of 0.05 ° C. between 35 to 42 ° C. However, a thermistor type or thermopile (thermocouple) type is also possible. Reference numeral 103 denotes a transmission / reception circuit for acquiring body temperature information of an IC tag (RFID) 100 having a temperature measurement unit provided in the subject P, 103a denotes an antenna, and 104 denotes a power supply unit. The power supply unit 104 supplies power to each unit of the IC tag 100 having the temperature measurement unit when the body temperature information is read through the antenna unit 103a having a coil. Reference numeral 107 denotes an A / D converter, which A / D converts a body temperature signal generated by the temperature sensor 106 and an oscillation circuit (not shown). The IC tag 100 has a size of about 5 mm × 5 mm and a thickness of about 1.5 mm including the antenna 103a. The IC tag 100 may be any frequency as long as it can communicate (transmit / receive) with an electromagnetic wave having a frequency that can pass through a living body, but preferably can transmit with an electromagnetic wave of 13.56 MHz. .

Since the body temperature information can also be stored in the EEPROM 102, the body temperature information can be stored continuously even if the subject P is transferred to another mat. Further, it is possible to prevent the acquisition of incorrect information about the subject P, or to provide a security function by enabling encryption processing of a signal output from the antenna 103a.

In the data processing unit 37, the calculation result of the calculated heart rate, respiration rate, body movement magnitude, body temperature, etc. is stored in the storage unit 44 in the storage unit 44 in association with the ID of the subject P. At the same time, it is displayed on the display device 36. At the same time, transmission to the management site / medical site 7 is possible. In this way, the state of the subject P is monitored.

The biometric data identifies the heart rate, the respiratory rate, and the like based on the characteristics of signals captured by the differential pressure sensor (relative pressure sensor) 20 and the absolute pressure sensor 21. For example, the heart rate and the respiration rate are separated into frequencies in the normal range through the filters 32 and 33. After conversion into a digital signal by the A / D conversion unit 35, the data processing unit 37 performs fast Fourier transform to obtain a fundamental frequency that becomes a peak spectrum, and extracts each of them.

<Biological information acquisition processing flow>
The measurement is started on the condition that the subject P is on the air mat 2 (recumbent, supine) or an input instruction such as a measurement start operation in the input unit 45 or the like. Every 10 to 60 minutes, a pressure signal is acquired (detected) by the differential pressure sensor (relative pressure sensor) 20 and the absolute pressure sensor 21 (step S1). Based on the characteristics of the acquired pressure signal, the heart rate, respiration rate, etc. are identified, and the heart rate, respiration rate, etc. are calculated (step S2). One pressure detection time is about 2 to 5 minutes. The body temperature information is obtained every 10 to 60 minutes by transmitting an electromagnetic wave of 13.56 MHz from the IC tag reading unit 34 to the IC tag 100 (transmission / reception distance is about 10 cm to 1 m) and synchronized with the signal. The body temperature information of the temperature sensor 106 is read (step S3). These pieces of biological information are stored in the storage unit 44 (step S4). This biological information is compared with a threshold value (step S5). For example, in the case of body temperature, the upper limit value is 37.0 ° C. and the lower limit value is 35.5 ° C. For example, the upper limit value is 120 beats / minute, the lower limit value is 30 beats / minute, and the respiration rate is, for example, the upper limit value is 90 / minute and the lower limit value is 10 / minute. If at least one of these pieces of biological information is determined to be abnormal, an alarm is generated (step S6) and notified to the doctor 10 in charge at the management site / medical site 7. In addition, you may make it alert | report to the mobile telephone etc. of the doctor 10 in charge. After confirming the condition of the subject P determined to be abnormal, the condition is reset (step S7). If there is no abnormality, the process returns to step S1, and the measurement of the biological information is repeated until a measurement end instruction is input. The biometric information measured and stored in the storage unit 44 calculates an average value, a maximum value, a minimum value, and a maximum value, and stores the data along with the ID of the subject P in the storage unit 44 and the server 9. The biological information such as heart rate, respiratory rate, and body temperature stored in the storage unit 44 is trend-displayed on the display unit 36 as shown in FIG. In the display unit 36, the heart rate, the respiratory rate, and the body temperature are simultaneously displayed every hour (60 minutes), but one or any combination of these may be displayed. Further, by inputting medication data such as an antipyretic as memo information in the input unit 45 together with the date and time, it can be displayed together with the trend display of the biological information on the display unit 36. The same display can be performed on the display unit (not shown) of the management site / medical site 7.

In step S5, before the comparison with the threshold value is made, measurement is performed when the rate of change of biological information such as heart rate, respiratory rate, and body temperature is greater than a predetermined value, for example, at 0.5 ° C./hour at body temperature. By making the interval shorter than the initial set value and measuring, the subject P can be monitored in more detail.

The analysis time (predetermined time) based on pressure detection can be set to an arbitrary time, not 2 to 5 minutes. The analysis time may be a time convenient for data analysis of one bedtime, and can be set within a predetermined bedtime instead of one bedtime. The optimum conditions are set according to the system size and analysis speed.

For example, the data processing unit 37 determines the health status of the subject P based on the following criteria.

Next, we will explain the abnormal monitoring during sleep and emergency calls. The data processing unit 37 of the terminal device 5 analyzes the biological data for a predetermined time (2 to 5 minutes) to calculate the heart rate, the respiration rate, and the like, and from the temperature information from the IC tag, these are abnormal. When it exceeds a predetermined value range, it is displayed on the display device 38 as an abnormal body temperature value, an abnormal heart rate, and an abnormal respiratory rate, and is notified to the management personal computer 11 as an emergency call. At this time, if the state of the subject P is imaged by the imaging means and can be transmitted together with the abnormal information of the biological information, the judgment of the doctor 10 of the management site / medical site 7 becomes easy. The data processing unit 37 displays the abnormal heart rate and respiratory rate on the display device 38 and sounds the buzzer. The data processing unit 37 recognizes a seizure when the body movement continues for a certain time or longer, similarly displays and buzzes, and notifies the management personal computer 11 of the management site / medical site 7 via the information communication network 8. In response to this, a medical worker such as a doctor at the management site / medical site 7 feeds back a coping method via the information communication network 8, telephone, FAX or the like.

It is a figure which shows one Example of this invention. It is a block diagram concerning the example of the present invention. It is a block diagram of the IC tag which has the temperature measurement part which concerns on the Example of this invention. FIG. 2 is a diagram showing a diaper fitted with a diaper fitted with an IC tag having a temperature measuring unit according to an embodiment of the present invention and a diaper fitted with an IC tag. It is a figure which shows the acquisition process flow of the biometric information which concerns on the Example of this invention. It is a figure which shows the example of a display concerning the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Room of hospital, nursing care facility, etc. 2 ... Air mat, 3 ... Bed, 4 ... Air tube, 5 ... Terminal device, P ... Subject, 7 ... Management site , 8 ... Information communication network, 9 data server, 10 ... Physician in charge, 100 ... IC tag, 101 ... RAM, 102 ... EEPROM, 103 ... Transmission / reception circuit, 103a ...・ Antenna 106 ... Thermistor 200 ... Diaper

Claims (6)

An air mat installed on the subject's bed, a biological information detecting means provided on the air mat, an IC tag having a temperature measuring unit attached to the subject, and a reading unit for reading information on the IC tag; And monitoring the condition of the subject based on the biological data and temperature information of the IC tag. An air mat installed in the bed of the subject, a pressure detection means for detecting an internal pressure change of the air mat, and a means for measuring the biological data of the subject based on the internal pressure change of the air mat detected by the pressure detection means And an IC tag having a temperature measurement unit attached to the subject, and a reading unit for reading information on the IC tag, and the state of the subject based on the biological data and the temperature information of the IC tag Monitoring device characterized by monitoring. An air mat placed on the subject's bed, a pressure detection means for detecting an internal pressure change of the air mat, and a measurement for measuring the biological data of the subject based on the internal pressure change of the air mat detected by the pressure detection means Means, an IC tag having a temperature measurement unit attached to the subject, and a reading unit for reading the information of the IC tag, the biological data for a predetermined time and the temperature information of the IC tag are obtained in advance. A monitoring apparatus for monitoring the condition of the subject in comparison with normal biological data. An air mat placed on the subject's bed, a pressure detection means for detecting an internal pressure change of the air mat, and a measurement for measuring the biological data of the subject based on the internal pressure change of the air mat detected by the pressure detection means Means, an IC tag having a temperature measurement unit attached to the subject, and a reading unit for reading the information of the IC tag, the biological data for a predetermined time and the temperature information of the IC tag are obtained in advance. A monitoring device that monitors the condition of the subject in comparison with the normal biological data, and the subject's state compared with the biological data for a predetermined time and the normal biological data obtained in advance. A monitoring system comprising: a terminal device that monitors a sleeping state; and a management control device installed at a management site and / or a medical site so as to be able to transmit to the terminal device. Based on the pressure detection process program for detecting the internal pressure change of the air mat installed in the bed of the subject by the pressure detection means, and the biological data of the subject based on the internal pressure change of the air mat detected by the pressure detection means A program for measuring by the measuring means, a program for reading temperature information of an IC tag having a temperature measuring unit attached to the subject, the biological data for a predetermined time, and temperature information of the IC tag in advance A computer storing a program for monitoring the state of the subject in comparison with the obtained normal biological data and comparing the biological data for a predetermined time with the normal biological data obtained in advance. Storage media readable by. A diaper provided with an IC tag having the temperature measuring unit according to claim 1.

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