KR102566001B1 - Reliability Determination Device And Method Of Biological Signals - Google Patents

Abstract

An apparatus for determining the reliability of a physiological signal of a subject, comprising: a physiological signal measurer configured to measure the physiological signal of the subject; a motion information generation unit configured to generate motion information of the subject through at least one motion detection pressure sensor; a reliability determination unit determining reliability of the physiological signal based on the motion information; and an output determination unit configured to determine an output corresponding to the physiological signal according to a result of the determination.

Description

Reliability Determination Device And Method Of Biological Signals }

The present disclosure relates to an apparatus and method for determining reliability of a biosignal.

Pressure sores are a disease that occurs on the skin part that comes into direct contact with the floor when a seriously ill patient lies in bed for a long time. Therefore, the function of notifying posture change is important for preventing diseases such as pressure sores in immobile patients.

In the past, the patient's position change notification technology has a problem of measuring false data when the patient moves a lot, the probe, electrode, etc. attached to the patient fall off.

In addition, the existing proposed method performs an algorithm by simply measuring pressure, but it is difficult to determine the patient's condition because it does not consider changes in blood oxygen saturation (SP02), heart rate, and movement of biosignals.

The background technology of the present application is disclosed in Korean Patent Publication No. 10-2019-0060976.

The present invention is to solve the problems of the prior art described above, and to provide a device and method for notifying the movement after a certain period of time when there is no movement of the patient using a sensor for detecting the movement of the patient and a biosignal of the patient. do.

However, the technical problem to be achieved by the embodiments of the present application is not limited to the technical problems described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, an apparatus for determining the reliability of a subject's bio-signal according to an embodiment of the present invention includes a bio-signal measurer for measuring the subject's bio-signal, and at least one motion detection pressure sensor. A motion information generation unit generating motion information of the subject, a reliability determination unit determining reliability of the biosignal based on the motion information, and an output determining an output corresponding to the biosignal according to a result of the determination. It may contain a crystal part.

In addition, according to an embodiment of the present application, the reliability determiner determines a first time point at which the movement of the subject occurs based on the motion information, determines a second time point at which a change in the physiological signal occurs, and A timing determination unit for determining whether the timing is earlier than the second timing, and a physiological signal reliability determining unit for determining the reliability of the biosignal when the first timing is slower than the second timing.

Further, according to an embodiment of the present application, the bio-signal reliability determining unit determines the reliability of the bio-signal as valid when the first time point is slower than the second time point, but the first time point is higher than the second time point. If it is fast or the first time point is the same as the second time point, the reliability of the bio-signal may be determined to be invalid.

In addition, according to an embodiment of the present application, the bio-signal reliability determiner determines the reliability of the bio-signal as a first level when the first time point is slower than the second time point, but the first time point is the second time point. If it is earlier than the time point or when the first time point is equal to the second time point, the reliability of the bio-signal may be determined as a second level lower than the first level.

In addition, according to an embodiment of the present application, the reliability determiner may determine the reliability of the bio-signal when the motion of the subject is greater than a predetermined threshold value.

In addition, according to an embodiment of the present application, the output determination unit determines the output corresponding to the biosignal as a value at the second point in time when the reliability is valid, but corresponds to the biosignal when the reliability is invalid. It can be determined that the output to be maintained at the previously displayed value.

In addition, according to an embodiment of the present application, in the step of determining the reliability of the subject's bio-signal, measuring the subject's bio-signal, generating motion information of the subject through at least one motion detection pressure sensor The method may include determining reliability of the biosignal based on the motion information, and determining an output corresponding to the biosignal according to a result of the determination.

The above-described problem solving means are merely exemplary and should not be construed as intended to limit the present disclosure. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description of the invention.

According to the above-described problem solving means of the present application, the present application may obtain reliability data for a patient's condition by obtaining pressure information for movement based on a biosignal.

However, the effects obtainable herein are not limited to the effects described above, and other effects may exist.

1 is a schematic configuration diagram of an apparatus for determining reliability of a biosignal according to an embodiment of the present disclosure.
2 is an example of a case in which a first time point is earlier than or equal to a second time point according to an embodiment of the present disclosure.
3 is an example of a case where a first time point is slower than a second time point according to an embodiment of the present disclosure.
4 is a schematic embodiment of an apparatus for determining the reliability of a biosignal according to an embodiment of the present disclosure.
Figure 5 is an example of notifying a movement time after a certain time to a non-moving patient according to an embodiment of the present application.
6 is a schematic flowchart of a method for determining the reliability of a biosignal according to an embodiment of the present disclosure.

Hereinafter, embodiments of the present application will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the present specification, when a part is said to be “connected” to another part, it is not only “directly connected”, but also “electrically connected” or “indirectly connected” with another element in between. "Including cases where

Throughout the present specification, when a member is referred to as being “on,” “above,” “on top of,” “below,” “below,” or “below” another member, this means that a member is located in relation to another member. This includes not only the case of contact but also the case of another member between the two members.

Throughout the present specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

1 is a schematic configuration diagram of an apparatus for determining reliability of a biosignal according to an embodiment of the present disclosure. Referring to FIG. 1 , the bio-signal reliability determination device 100 may include a bio-signal measurer 110, a motion information generator 120, a reliability determiner 130, and an output determiner 140. .

The bio-signal measurer 110 is a device for determining the reliability of the subject's bio-signal, and may measure the subject's bio-signal. In addition, the biological signal measurer 110 may generate motion information of the subject through at least one motion detection pressure sensor. The reliability determination unit 130 may determine the reliability of the biosignal based on the motion information. The output determiner 140 may determine an output corresponding to the biosignal according to the determination result. Accordingly, the apparatus 100 for determining the reliability of a biosignal may acquire reliability data for a patient's condition by obtaining motion pressure information based on the biosignal.

The bio-signal measurer 110 may measure the subject's bio-signal. For example, the vital signal may be at least one of blood oxygen saturation (SP02) and heart rate. Here, the blood oxygen saturation (SP02) may be measured using an optical sensor for measuring the blood oxygen saturation (SP02). At this time, as the optical sensor, a device such as a laser may be used. Here, the optical sensor may be attached to at least one of fingers, toes, wrists, ankles, and ears among body parts of the patient. In this case, the biological signal measurer 110 may measure the blood oxygen saturation (SP02) in a non-invasive way by irradiating an optical signal for each wavelength. At this time, the biological signal measurer 110 may generate blood oxygen saturation waveform information from the measured blood oxygen saturation (SP02). Here, the bio-signal measurer 110 may apply a moving average filter to the blood oxygen saturation waveform information to reduce signal fluctuations due to noise. Here, the moving average filter may be an algorithm that discards first data in chronological order and obtains an average of next data within a predetermined time. In this case, the data may mean data corresponding to time.

Also, heart rate may be measured using an optical sensor for measuring heart rate. At this time, as the optical sensor, a device such as a laser may be used. Here, the optical sensor may be attached to at least one of fingers, toes, wrists, ankles, and ears among body parts of the patient. At this time, the biosignal measuring unit 110 may measure the heart rate in a non-invasive way by irradiating an optical signal for each wavelength. In this case, the biosignal measurer 110 may generate heart rate waveform information from the measured heart rate. Here, the biosignal measurer 110 may reduce signal fluctuations due to noise by applying a moving average filter to the heart rate waveform information. Here, the moving average filter may be an algorithm that discards first data and obtains an average of next data at a predetermined time. In this case, the data may mean data corresponding to time.

The motion information generation unit 120 may generate motion information of the subject through at least one motion detection pressure sensor. In addition, the motion information generating unit 120 may be configured with an array of a plurality of motion detection pressure sensors. At this time, the motion sensing pressure sensor may be composed of an array of at least a pressure-sensitive motion sensing pressure sensor, a Force Sensing Resistor (FSR), or a conductive fiber sensor, and a change in resistance value for applied pressure may induce a change in voltage. . Here, FSR is an abbreviation of Force Sensing Resistor and may be a motion sensing pressure sensor using a property in which a resistance value changes according to physical force, weight, and the like. In addition, the pressure information may be expressed as coordinates of at least a three-dimensional isobaric diagram, a pressure histogram, a pressure distribution, and pressure values with respect to time.

Also, the motion detection pressure sensor may be a thin film type sensor composed of several layers. Illustratively, the motion detection pressure sensor has a middle layer that creates a spatial gap called a spacer in the middle, and a layer (FPC) in which a circuit is printed above and below the spacer in the middle and a film layer (MD film) coated with a conductive material may be disposed. When force is applied from above, the resistance value of the sensor may decrease as more parts of the layer (FPC) on which the circuit is printed come into contact with the film layer (MD film).

The movement motion information generating unit 120 may include a motion detection pressure sensor. The motion-sensing pressure sensor can be attached directly to a patient or attached to a couch. In addition, the motion detection pressure sensor may be movably attached. Through this, the motion information generating unit 120 may not be restricted by location.

The motion information generating unit 120 may measure the motion level of the patient due to a change in resistance according to pressure based on the motion sensing pressure sensor. In addition, when pressure is applied, the motion information generation unit 120 may record at least one of a pressure value, a pressure change value, pressure generation location information, and pressure generation time information. At this time, the motion information generation unit 120 may apply the pressure distribution change algorithm to determine the motion level.

Specifically, the pressure distribution change algorithm may generate information about a pressure distribution map by extracting a pressure generation position from at least one motion sensing pressure sensor. At this time, the pressure distribution may be adjusted according to the patient's weight. Here, the pressure distribution may be divided into maximum pressure, minimum pressure, and intermediate pressure. In addition, the motion information generation unit 120 may determine a pressure change value by determining a pressure level according to pressure generation time and pressure generation location information. In this case, the pressure change value may be an average value of pressure change values of at least one motion sensing pressure sensor.

The motion information generator 120 may measure the time when the motion level does not change. The time during which the movement level does not change may be a continuous measurement time during which the patient does not move.

The reliability determination unit 130 may determine the reliability of the biosignal based on the motion information. In detail, the reliability determination unit 130 may determine the presence or absence of an abnormality in the patient by comparing the time when the movement occurs and the time when the biosignal changes occur. As a result, the reliability determination unit 130 can prevent false data measurement due to at least one of shaking and vibration of the patient attachment part.

The reliability determination unit 130 may set a limit value of the pressure value. For example, the reliability determination unit 130 may determine that the pressure data is invalid when the pressure value generated by the motion information generation unit 120 is greater than or equal to a predetermined upper limit and less than or equal to a predetermined lower limit. Through this, the bio-signal reliability determining device 100 can determine at least one of a disconnection of the internal circuit of the bio-signal reliability determining device 100 and a failure of the motion detection pressure sensor.

The reliability determination unit 130 may determine the reliability of the bio-signal when the motion of the subject is greater than a predetermined threshold value. Here, the predetermined threshold may mean sensitivity to motion information of the subject. Here, sensitivity may be a determining factor for changing a movement level according to a patient's movement level. For example, when the reliability determination unit 130 sets a high sensitivity, the patient's movement level can be increased even with a small movement change.

The reliability determination unit 130 may include a viewpoint determination unit 131 and a physiological signal reliability determination unit 132 .

The time determination unit 131 determines a first time point at which the subject's movement occurs based on the motion information, determines a second time point at which a bio-signal change has occurred, and determines whether the first time point is earlier than the second time point. can Here, the first point in time when the movement occurs may mean a point in time when the average pressure change value becomes greater than a predetermined threshold value. The predetermined threshold may mean at least one of a pressure change value and a pressure value determined by a user. In addition, the first point in time when the movement of the subject occurs may mean a point in time for initializing the pressure measurement time. The second point in time at which a change in biosignal occurs may mean a point in time when an abnormality occurs in the patient, such as at least one of myocardial infarction, cardiac ischemia, heart attack, and fall accident.

2 is an example of a case in which a first time point is earlier than or equal to a second time point according to an embodiment of the present disclosure. Referring to FIG. 2 , when the first time point is earlier than the second time point or the first time point is equal to the second time point, the biometric reliability determination unit 132 determines the reliability of the biosignal as a second grade lower than the first time point. can be judged by At this time, the biometric reliability determination unit 132 may consider the value of the biosignal when determining the reliability of the biosignal as the second grade. For example, the biometric reliability determination unit 132 may consider at least blood oxygen saturation (SP02) and heart rate values.

Also, when the first time point is earlier than the second time point or the first time point is equal to the second time point, the biometric reliability determination unit 132 may determine the reliability of the bio signal as invalid. Invalidity of biosignal reliability may mean that the patient is in a dangerous state. That is, the bio-signal reliability determiner 132 may determine the patient as a dangerous state when the heart rate of the patient is greater than a predetermined difference from the heart rate of the average bio-signal of the patient. In addition, the bioreliability determination unit 132 may determine that the patient is in a dangerous state when the value of the blood oxygen saturation level (SP02) is less than or equal to a predetermined value.

3 is an example of a case where a first time point is slower than a second time point according to an embodiment of the present disclosure.

Referring to FIG. 3 , the biosignal reliability determiner 132 may determine the reliability of the biosignal when the first time point is slower than the second time point. Specifically, when the first time point is slower than the second time point, the time point at which movement occurs may be slower than the change time point of the biosignal. In other words, it may refer to a case where a change in biosignal is earlier than a movement occurs.

The bio-signal reliability determination unit 132 may determine the reliability of the bio-signal as valid when the first time point is slower than the second time point. In other words, when the reliability of the bio-signal is determined to be valid, the pressure change value, the movement level, the patient's heart rate, and the pressure measurement time measured by the apparatus 100 for determining the reliability of the bio-signal may be determined to be valid. That is, the apparatus 100 for determining the reliability of the bio-signal may determine that all previously measured data before determining the reliability of the bio-signal as invalid is valid. At this time, the data may be at least one of data generated by the motion information generating unit 120 and data generated by the biosignal measuring unit 110 .

Specifically, the bio-signal reliability determination unit 132 may determine the reliability of the bio-signal as the first level when the first time point is slower than the second time point. Specifically, the first degree of reliability of the bio-signal may mean only when the patient is in a stable state and notification of the patient's movement is required after a predetermined time. In another sense, a notification indicating whether or not the patient is moving may be determined in consideration of a pressure change value according to movement of the biosignal reliability determination unit 132 .

The output determination unit 140 may determine the output corresponding to the biosignal as a value at the second point in time when the reliability is valid, but may determine that the output corresponding to the biosignal is maintained at a previously displayed value when the reliability is invalid. . Here, the output determination unit 140 may send a notification service to the guardian of the patient when the previously displayed maintenance value exceeds a predetermined time. As a result, the guardian of the patient can know whether the patient is in a dangerous state or not.

The output determination unit 140 may initialize the measurement time when the measurement time of the motion level level has passed a preset time. At this time, the output determining unit 140 may transmit a posture change signal to the patient through vibration and sound. Here, the attitude change signal may be generated in a place where conventional pressure distribution is not achieved. Accordingly, the output determination unit 140 may periodically change the posture of the patient.

The output determiner 140 may determine an output corresponding to the biosignal according to the determination result. Here, the vital signal may mean at least an oxygen saturation level (SPO2) value, a movement level, a pressure measurement time, and a heart rate. Specifically, the output determining unit 140 outputs heart rate and heart variability if the result of the determination is invalid. The patient's condition may be output as a dangerous state. Also, the output determination unit 140 may inform the patient or the patient's guardian of the patient's bio-signal using the user terminal.

4 is a schematic example of an apparatus for determining the reliability of a biosignal according to an embodiment of the present disclosure.

Referring to FIG. 4 , the apparatus 100 for determining reliability of a biosignal may interwork with a terminal of a patient. In this case, the user terminal (patient terminal) may be a terminal that inputs motion information and bio signals to the patient. The bio-signal reliability determination apparatus 100 may include all kinds of servers, terminals, or devices that transmit and receive data, contents, and various communication signals with a user terminal through a network, and have functions of storing and processing data.

A user terminal (patient terminal) is a device that interworks with a server through a network, for example, a smartphone, a smart pad, a tablet PC, a wearable device, etc. Global System for Mobile communication), Personal Digital Cellular (PDC), Personal Handyphone System (PHS), Personal Digital Assistant (PDA), International Mobile Telecommunication (IMT)-2000, Code Division Multiple Access (CDMA)-2000, W-CDMA (W-Code Division Multiple Access) and Wibro (Wireless Broadband Internet) terminals, and all kinds of wireless communication devices, desktop computers, and fixed terminals such as smart TVs.

Examples of networks for sharing information between a user terminal (patient terminal) and a server include a 3rd Generation Partnership Project (3GPP) network, a Long Term Evolution (LTE) network, a 5G network, a World Interoperability for Microwave Access (WIMAX) network, wired and wireless Internet, LAN (Local Area Network), Wireless LAN (Wireless Local Area Network), WAN (Wide Area Network), PAN (Personal Area Network), Bluetooth network, Wifi network, NFC (Near Field Communication) A network, a satellite broadcasting network, an analog broadcasting network, a Digital Multimedia Broadcasting (DMB) network, and the like may be included, but is not limited thereto.

Figure 5 is an example of notifying a movement time after a certain time to a non-moving patient according to an embodiment of the present application.

Referring to FIG. 5 , when the patient does not move for a predetermined period of time or more of the apparatus 100 for determining the reliability of a biosignal, output may be displayed on the screen. In addition, the apparatus 100 for determining reliability of biosignals may output a posture change service to the patient using at least one of sound and vibration. At this time, the output may be generated where the existing pressure value is not measured. Due to this, the patient may unconsciously move in the direction to be moved.

6 is a schematic flowchart of a method for determining the reliability of a biosignal according to an embodiment of the present disclosure.

The bio-signal reliability determination method in FIG. 6 may be performed by the bio-signal reliability determination apparatus 100 described above with reference to FIGS. 1 to 5 . Therefore, even if the content is omitted below, the description of the apparatus 100 for determining the reliability of biosignals shown in FIGS. 1 to 5 can be applied to FIG. 6 as well.

In step S11, the bio-signal reliability determination apparatus 100 may measure the subject's bio-signal.

In step S12, the apparatus 100 for determining the reliability of the biosignal may generate motion information of the subject through at least one pressure sensor.

In step S13, the bio-signal reliability determination apparatus 100 may determine the bio-signal reliability based on the motion information.

In step S14, the apparatus 100 for determining the reliability of the biosignal may determine an output corresponding to the biosignal according to the determination result.

A method for determining the reliability of a biosignal according to an embodiment of the present application may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the medium may be those specially designed and configured for this application or those known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - includes hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to act as one or more software modules to perform the operations herein, and vice versa.

In addition, the above-described method for determining the reliability of a biosignal may be implemented in the form of a computer program or application stored in a recording medium and executed by a computer.

The above description of the present application is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application.

100: Reliability judgment device of vital signs
110: biosignal measuring unit
120: motion information generation unit
130: reliability determination unit
131: viewpoint determination unit
132: vital signal reliability determination unit
140: output determination unit

Claims (8)

In the device for determining the reliability of the subject's bio-signal,
a bio-signal measurer configured to measure a bio-signal of the subject;
a motion information generation unit configured to generate motion information of the subject through at least one motion detection pressure sensor;
a reliability determination unit determining reliability of the physiological signal based on the motion information; and
an output determination unit which determines an output corresponding to the bio-signal according to a result of the determination; including,
The reliability determination unit,
Based on the motion information, a first time point in which the subject's movement occurred is determined, a second time point in which a change in the biosignal occurred, and whether the first time point is earlier than the second time point is determined. wealth; and
a bio-signal reliability determiner configured to determine the reliability of the bio-signal when the first time point is slower than the second time point; Including, the reliability determination device of the bio-signal. delete According to claim 1,
The bio-signal reliability determination unit,
When the first time point is slower than the second time point, the reliability of the biosignal is determined to be valid;
When the first time point is earlier than the second time point or the first time point is equal to the second time point, the reliability of the bio-signal is determined to be invalid. According to claim 1,
The bio-signal reliability determination unit,
When the first time point is slower than the second time point, the reliability of the bio-signal is determined as a first level;
When the first time point is earlier than the second time point or the first time point is equal to the second time point, the reliability of the physiological signal is determined as a second level lower than the first level. A device for determining the reliability of a signal. According to claim 1,
The reliability determination unit,
and determining the reliability of the bio-signal when the motion of the subject is greater than a predetermined threshold. According to claim 3,
The output decision unit,
When the reliability is valid, determining an output corresponding to the biosignal as a value at the second time point,
and determining to maintain an output corresponding to the bio-signal at a previously displayed value when the reliability is invalid. A method for determining the reliability of a subject's bio-signal performed by a bio-signal reliability determination device,
measuring a biosignal of the subject;
generating motion information of the target person through at least one motion detection pressure sensor;
determining reliability of the physiological signal based on the motion information; and
Determining an output corresponding to the biosignal according to a result of the determination; including,
The step of determining the reliability of the biosignal may include determining a first time point in which the subject's movement occurred based on the motion information, determining a second time point in which a change in the biosignal occurred, and The method of determining reliability of a bio-signal, comprising determining whether it is faster than a second time point, and determining reliability of the bio-signal when the first time point is slower than the second time point. A computer-readable recording medium storing a program for executing the method of claim 7 on a computer.

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