JP6226828B2 - Biological information measuring device, biological information measuring method, and program - Google Patents

Description

  The present invention relates to a biological information measuring device, a biological information measuring method, and a program.

  When measuring vital signs such as pulse and blood pressure, a biological interface (cuff, electrode, etc.) is attached to the living body of the subject. The medical device captures a biological signal from the biological interface, calculates a measurement value (for example, an electrocardiogram) based on the biological signal, and displays it. The doctor or the like grasps the condition of the subject by referring to a monitor or the like on which the measured value is displayed.

  Here, the state of the subject to be measured is various. For example, the subject may be unable to keep quiet because of pain. Moreover, when a test subject is a child, the said child may move during a measurement. That is, body movement during measurement may occur. When body movement occurs, an error occurs in the biological signal, and there is a problem that an accurate measurement value cannot be obtained.

  Hereinafter, a technique for canceling the body movement of the subject (correcting the measured value in consideration of the body movement) will be exemplified. Patent Document 1 discloses a pulse wave signal measurement device that can appropriately remove body motion noise from a pulse wave signal. Patent Document 2 discloses a biosensor device that can measure a small body movement of a subject in addition to an electrocardiogram signal.

JP 2012-157423 A JP 2007-296266 A

  However, when the subject's body movement is very large, the measurement value may not be sufficiently corrected. In this case, doctors and nurses may refer to measurement values that are not accurate. In addition, an unintended biological information alarm may sound. That is, when the subject's body movement is large, doctors and nurses may refer to erroneous measurement values and alarms for diagnosis and treatment.

  The present invention has been made in view of the above-described problems, and a biological information measuring device, a biological information measuring method, and a biological information measuring method capable of notifying that a measured value may not be accurate when the subject's body movement is large, and The main purpose is to provide a program.

One aspect of the biological information measuring device according to the present invention is:
A measurement unit that acquires biological information from a biological interface worn by the subject;
A body motion comparison unit that compares the body motion information of the subject obtained from the sensor with a threshold;
An output unit that outputs biological information of the subject,
The output unit changes an output method when it is determined that the body motion information is larger than the threshold value and when the body motion information is determined to be smaller than the threshold value.

One aspect of the biological information measuring method according to the present invention is:
A measurement step for obtaining biological information from a biological interface worn by the subject;
A body motion comparison step of comparing the body motion information of the subject obtained from the sensor with a threshold;
An output step for outputting the biological information of the subject,
In the output step, when it is determined that the body motion information is larger than the threshold value, the output method is changed when the body motion information is determined to be smaller than the threshold value.

One aspect of the program according to the present invention is as follows:
On the computer,
A measurement step for obtaining biological information from a biological interface worn by the subject;
A body motion comparison step of comparing the body motion information of the subject obtained from the sensor with a threshold;
Outputting the biological information of the subject, and
In the output step, when it is determined that the body motion information is larger than the threshold value, the output method is changed when the body motion information is determined to be smaller than the threshold value.

  In the present invention, the body movement information of the subject is compared with a threshold value, and when the body movement is large, the output method is changed. Thereby, a user such as a doctor can easily recognize that the subject's body movement is large, and can avoid performing wrong diagnosis and treatment.

  The present invention can provide a biological information measuring device, a biological information measuring method, and a program capable of notifying that a measured value may not be accurate when a subject's body movement is large.

1 is a block diagram showing a configuration of a biological information measuring apparatus 1 according to a first embodiment. It is a conceptual diagram which shows the threshold value which the body movement comparison part 10 concerning Embodiment 1 uses. 3 is a flowchart showing an operation of the biological information measuring apparatus 1 according to the first embodiment. FIG. 3 is a diagram illustrating an example of a display screen of the biological information measuring apparatus 1 according to the first embodiment. FIG. 3 is a diagram illustrating an example of a display screen of the biological information measuring apparatus 1 according to the first embodiment. It is a figure which shows the 1st-3rd induction | guidance | derivation in general 12-lead electrocardiogram measurement. It is a conceptual diagram which shows the threshold value which the body movement comparison part 10 concerning Embodiment 1 uses. FIG. 3 is a diagram illustrating an example of a display screen of the biological information measuring apparatus 1 according to the first embodiment.

<Embodiment 1>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a biological information measuring apparatus 1 according to the present embodiment. The biological information measuring device 1 is a device that measures biological information via a biological interface such as a cuff or an electrode. The biological information measuring device 1 is, for example, a biological information monitor, an electrocardiogram measuring device, an electroencephalograph, a biological telemeter, or the like. In the following description, the biological information measuring device 1 will be described as a biological information monitor capable of measuring a plurality of parameters (respiration, blood pressure, electrocardiogram, body temperature, etc.).

  The biological information measuring apparatus 1 includes a body movement comparison unit 10, a measurement unit 20, an output unit 30, and a storage unit 40. The measurement unit 20 includes a correction unit 21. The output unit 30 includes a display output unit 31 and a sound output unit 32. The biological information measuring device 1 is connected to the biological interface 100 via a cable. The biological interface 100 is, for example, a cuff or an electrode (including various forms such as a seal electrode and a clip electrode), and is attached to a living body of a subject to acquire a biological signal. In the example of FIG. 1, the biological information measuring device 1 is connected to cuff-like biological interfaces 100-1 and 100-2. The number of biological interfaces worn by the subject may be an arbitrary number, and three or more biological interfaces may be attached. In the following description, when the biometric interfaces 100-1 and 100-2 are not distinguished, they are simply described as “biological interface 100”.

  A sensor 110-1 is attached to the biological interface 100-1. Similarly, a sensor 110-2 is attached to the biological interface 100-2. In the following description, when the sensors 110-1 and 110-2 are not distinguished, they are simply described as “sensor 110”. The sensor 110 includes a gyro sensor, an acceleration sensor, and the like.

  The sensor 110-1 detects the movement (the amount of movement, the direction, the generated pressure, etc.) of the subject's left foot. Similarly, the sensor 110-2 detects the movement of the subject's left hand (the amount of movement, the direction, the pressure generated, etc.). Hereinafter, the movement information detected by the sensor 110 is referred to as body movement information. For example, body motion information is a concept that includes pressure (for example, force generated in a palm when a hand is held) and the like in addition to the amount of movement, the angle of movement, and the direction of movement. In the following description, it is assumed that the body motion information includes information on acceleration (mV / g).

  The sensor 110 may be fixed to the surface of the cuff or electrode, or may be provided so as to be built in the cuff or the like. The sensor 110 is preferably built in or attached to the biological interface 100, but the sensor 110 and the biological interface 100 may be independently attached to the subject as long as the body motion of the subject can be acquired.

  The memory | storage part 40 memorize | stores the various information of the biometric information measuring apparatus 1, and is comprised by secondary storage devices, such as a hard disk, for example. The storage unit 40 may be configured to be detachable like a USB (Universal Serial Bus) memory.

  Body motion information detected by each sensor (110-1, 110-2) is supplied to the body motion comparison unit 10. The body motion comparison unit 10 can detect how much each part (right arm, left arm, left foot, right foot, etc.) of the subject is moving by identifying which sensor 110 is the information sent from the sensor. . The body movement comparison unit 10 compares the detected body movement information with the threshold value stored in the storage unit 40. An example of the threshold is shown in FIG.

  The storage unit 40 stores a table as shown in FIG. As shown in FIG. 2, the threshold and the output method of the output unit 30 described later are set according to the measurement parameters (body temperature, electrocardiogram, blood pressure, electromyogram, SpO2, breathing, etc.). Each measurement parameter has different properties. For example, body temperature is not easily affected by body movement, but blood pressure and electrocardiogram are easily affected by body movement. Therefore, it is desirable to provide a threshold for each parameter as shown in FIG.

  In FIG. 2, during the measurement of the body temperature, if the total acceleration detected from each of the sensors 110-1 to 110-n is larger than YYmV / g (threshold), it is defined that the display is temporarily suspended and the sound is output. ing. The body motion comparison unit 10 compares the body motion information and the threshold value in real time according to the parameter being measured, and notifies the output unit 30 of the change of the output method when the body motion information becomes larger than the threshold value. To do. Further, the body movement comparison unit 10 notifies the output unit 30 of the cancellation of the change of the output method when the body movement becomes smaller than the threshold value.

  The measurement unit 20 receives measurement values of biological information acquired from the biological interfaces 100 (100-1, 100-2) and body movement information acquired by the sensors 110 (110-1, 110-2). Is done. The correction unit 21 in the measurement unit 20 corrects the measurement value of the biological information using a correction matrix (not shown) stored in the storage unit 40. The correction unit 21 supplies the corrected measurement value to the output unit 30.

  The output unit 30 outputs the correction value of the measurement value supplied from the correction unit 21 (displays or outputs sound). The display output unit 31 includes a general monitor and a control circuit that controls the monitor. The sound output unit 32 includes a general sound output speaker, a control circuit for the speaker, and the like.

  The output unit 30 receives notification of change of the output method and change cancellation from the body movement comparison unit 10. The output unit 30 switches the output method according to the notification. In other words, the output unit 30 changes the output method when the body movement is larger than the threshold as compared with the case where the body movement is smaller than the threshold. Here, changing the output method includes temporarily suspending the display, changing the color of the display or the size of the characters to call attention, outputting a sound for calling attention, and the like.

  With reference to FIG. 3, operation | movement of the biometric information measuring apparatus 1 is demonstrated anew. FIG. 3 is a flowchart showing the operation of the biological information measuring apparatus 1. The body movement comparison unit 10 acquires body movement information from each sensor 110 in real time (S11). The body movement comparison unit 10 compares the threshold value corresponding to the parameter being measured with the body movement information (S12).

  When the body movement is smaller than the threshold (S12: Yes), the output unit 30 displays and outputs the measurement value corrected by the correction unit 21 (S13). On the other hand, when the body movement is larger than the threshold value (S12: No), the output unit 30 changes the output method to output when the body movement is small (S14). For example, when the body movement is large, the output unit 30 temporarily stops displaying the measurement value (S14).

  FIG. 4 is a diagram illustrating a display screen example of the biological information measuring apparatus 1 when the body movement is larger than the threshold value. As shown in the figure, a message such as “Warning! The display is temporarily interrupted due to heavy movement.” Is displayed. By referring to this, a doctor or the like can easily recognize that the vital sign cannot be accurately obtained because the body movement of the subject is large.

  Note that the display screen of FIG. 4 is merely an example, and other display methods may be used. For example, the display output unit 31 may generate a display screen that temporarily suspends display of parameters for which measurement values could not be accurately acquired due to body movement and continuously displays measurement values for other parameters. An example of the display screen is shown in FIG. In the example of FIG. 5, the display of the electrocardiogram is temporarily stopped and the display of other parameters is continued.

  In the case of a parameter (for example, an electrocardiogram) to be measured using a plurality of biological interfaces 100, a part of information (for example, a part of the guidance) about one parameter is displayed and a part of the information (for example, a part of the guidance) It can also be hidden. The modification will be described below.

(Modification)
In this modification, a plurality of biological interfaces 100 are attached to each part (limbs, etc.) of a subject, and some information constituting parameters is displayed according to the detection position and size of body movement, and some information is displayed. Hide (or change the display effect). This modification will be described by taking an electrocardiogram measurement as an example.

  FIG. 6 is a diagram showing the first to third leads in a general 12-lead electrocardiogram measurement. The first guide is a guide that looks at the side wall of the left ventricle. In other words, the first induction is an induction showing a potential change when the clip electrode (biological interface 100-4) attached to the left arm is viewed from the clip electrode (biological interface 100-3) attached to the right arm. The second lead is a lead seen from the apex of the heart, and is the lead in which the waveform is most clearly drawn in the limb lead. In other words, the second induction is an induction showing a potential change when the clip electrode (biological interface 100-5) attached to the left foot is viewed from the clip electrode (biological interface 100-3) attached to the right arm. The third guide is a guide for viewing the right ventricular side surface and the left ventricular lower wall. In other words, the third induction is an induction showing a potential change when the clip electrode (biological interface 100-5) attached to the left foot is viewed from the clip electrode (biological interface 100-4) attached to the left hand. Sensors 110-3 to 110-5 are attached to the biological interfaces 100-3 to 100-5.

  A general electrocardiogram is a waveform drawn by summing up changes in potential of each lead. A general electrocardiogram measuring apparatus or biological information monitor has a display mode in which the waveform of each lead is displayed in addition to the electrocardiogram waveform.

  Here, when movement occurs only in the left arm, the first and third leads may not be able to acquire accurate measurement values, but the second lead is not affected. Similarly, when movement occurs only in the right arm, the first and second leads may not be able to acquire accurate measurement values, but the third lead is not affected. If movement occurs only in the left foot, the second and third leads may not be able to obtain accurate measurement values, but the first lead is not affected. That is, when an electrocardiogram is measured, there is a characteristic that the guidance that may be displayed is determined according to the position of movement.

  FIG. 7A and FIG. 7B are tables showing threshold values and the like related to the electrocardiogram measurement stored in the storage unit 40. The body motion evaluation unit 10 reads the body motion threshold value at each measurement position as shown in FIG. 7A, and compares the body motion information acquired from each part with the threshold value. For example, the body motion evaluation unit 10 compares the left arm body motion information with the left arm threshold value. The body motion evaluation unit 10 determines whether each condition is satisfied (whether the body motion is larger than the threshold value), and determines whether or not each guidance can be displayed according to the table shown in FIG. Thereafter, the body movement evaluation unit 10 notifies the output unit 30 of whether or not each guidance can be displayed.

  The output unit 30 displays an electrocardiogram in response to the notification from the body movement evaluation unit 10. FIG. 8 is a display screen showing an electrocardiogram display example generated by the output unit 30. In the example of FIG. 8, since the body movement is generated only on the left foot, only the first guide is displayed. In addition, the second guidance and the third guidance indicate that the display is temporarily stopped due to the influence of the movement of the left foot. In the example of FIG. 8, only the first to third leads are displayed for clarification, but other leads (such as aVR) may be displayed in the same manner.

  Note that the modification described with reference to FIGS. 6 to 8 is not limited to electrocardiogram measurement, and can be applied to any parameter measured using a plurality of biological interfaces 100. For example, the above-described modification can also be applied when the biological information measurement apparatus 1 performs so-called dual SpO2 measurement. For example, SpO2 probes are attached to the lower body and upper body of the newborn, and the sensor 110 is attached to each SpO2 probe. In this case, when there is no body movement, the output unit 30 displays the SpO2 values and upper / lower difference values of the upper and lower bodies. On the other hand, when there is a large body movement only in the upper body (or only the lower body), the output unit 30 interrupts the display of the vertical difference value and the SpO2 value on the side with the larger body movement, but the SpO2 value on the side with the smaller body movement. Display should continue.

  In the case of a sleep apnea test (polysomnography test), the measurement is performed with a plurality of sensors 110 attached to the subject. In the case of a sleep apnea test, the biological information measuring apparatus 1 continues to display information that can be displayed according to the position of body movement, and should not be displayed (information that has been affected by body movement too much). The display may be paused.

  That is, the modification described with reference to FIGS. 6 to 8 normally outputs some information constituting one parameter according to the movement of each part, and outputs some information different from the normal output. Any configuration may be used.

  Next, effects of the biological information measuring device 1 according to the present embodiment will be described. As described above, the biological information measuring apparatus 1 compares the body movement information with the threshold value, and changes the output method when the body movement is large. As a result, a user such as a doctor can easily recognize that the body movement is large, and can avoid performing wrong diagnosis or treatment.

  When the body movement is large, the output unit 30 is preferably controlled so as to temporarily stop the display output. This prevents doctors and nurses from referring to erroneous vital sign measurement values and avoids erroneous recognition of the condition of the subject.

  The sensor 110 is preferably built in the biological interface 100 or attached to the exterior of the biological interface 100. As a result, the sensor 110 can more accurately acquire the movement that has occurred in the biological interface 100.

  In addition, as shown in FIG. 2, it is preferable to provide a threshold value corresponding to each parameter (body temperature, electrocardiogram, respiration, electromyogram, SpO2, etc.). Thereby, the comparison process according to each parameter is attained. As a result, when a small body motion occurs, it is possible to perform control such that display of only the parameters that are affected is interrupted.

  Further, as shown in the modification, a part of information (for example, the first lead) is normally output even in one parameter (for example, an electrocardiogram), and the other information (for example, the second lead and the third lead) is normal. Different outputs are possible. Thereby, a doctor or the like can refer to information with high accuracy within one parameter and does not refer to information with low accuracy.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiments. However, the present invention is not limited to the embodiments already described, and various modifications can be made without departing from the scope of the invention. It goes without saying that it is possible.

  For example, the measurement unit 20 may not have the correction unit 21. That is, it is possible to adopt a configuration in which the measurement value is not corrected. Even when the measurement value is not corrected, the output method of the biological information measuring apparatus 1 is changed when the body movement is large. As a result, when the influence of body movement is large, the measurement value is not displayed. For example, a doctor or the like does not take a measurement value having a large influence of body movement as it is.

  Note that the comparison processing of the body movement comparison unit 10 and the output processing (display screen generation and sound output control) by the output unit 30 can be realized as a computer program that operates in the biological information measurement apparatus 1. That is, the biological information measuring apparatus 1 also includes a CPU (Central Processing Unit), a hard disk drive, a cache memory, and the like included in a general computer.

  The program may be stored using various types of non-transitory computer readable media and supplied to a computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W and semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)) are included. The program may also be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

DESCRIPTION OF SYMBOLS 1 Biological information measuring device 10 Body movement comparison part 20 Measurement part 21 Correction | amendment part 30 Output part 31 Display output part 32 Sound output part 40 Storage part 100 Biometric interface 110 Sensor

Claims (7)

A measurement unit that acquires biological information from a biological interface worn by the subject;
A body motion comparison unit that compares the body motion information of the subject obtained from the sensor with a threshold;
An output unit for outputting the biological information of the subject;
A storage unit that holds an output method when the threshold value and the body motion information corresponding to each of a plurality of biological information parameters are larger than the threshold value ,
The body movement comparison unit reads the threshold value corresponding to the biological information parameter to be measured and the output method from the storage unit, performs a comparison process between the body movement information and the read threshold value,
The output unit, when it is determined that the body movement information is larger than the threshold value , performs output related to the biological information parameter to be measured according to the output method read by the body movement comparison unit .
Biological information measuring device. The sensor is built in the biological interface, or the sensor is fixed to the exterior of the biological interface,
Biological information measuring apparatus according to claim 1, characterized in that. The subject wears a plurality of the sensors,
The body motion comparison unit determines whether the body motion information of the subject acquired by each of the plurality of sensors is larger than the threshold corresponding to each sensor, and configures one parameter according to the determination Determine the information that can be output normally and the information that is not normally output
The output unit performs output in accordance with the determination of the body movement comparison unit.
The living body information measuring device according to claim 1 or 2 characterized by things. The biological information measuring device is a device for measuring an electrocardiogram,
The subject wears first to third sensors as the sensors,
The body movement comparison unit determines whether the body movement information of the subject acquired by each of the first to third sensors is larger than the threshold corresponding to each sensor, and each of the first to third sensors On the basis of the determination regarding whether or not output display regarding the first to third leads is possible,
The output unit independently switches the output display related to the first to third leads based on the determination by the body movement comparison unit.
The living body information measuring device according to claim 3 characterized by things. The measurement unit corrects the biological information based on a correction matrix and supplies the corrected biological information to the output unit.
The biological information measuring device according to any one of claims 1 to 4 , wherein A measurement step for obtaining biological information from a biological interface worn by the subject;
A body motion comparison step of comparing the body motion information of the subject obtained from the sensor with a threshold;
An output step for outputting the biological information of the subject,
In the body movement comparison step, the threshold corresponding to each of a plurality of biological information parameters and a storage unit that holds an output method when the body movement information is larger than the threshold correspond to the biological information parameters to be measured. The threshold value and the output method are read, the body movement information is compared with the read threshold value,
In the output step, when it is determined that the body movement information is larger than the threshold value, the biological information measurement method performs output related to the measurement target biological information parameter according to the output method read in the body movement comparison step . On the computer,
A measurement step for obtaining biological information from a biological interface worn by the subject;
A body motion comparison step of comparing the body motion information of the subject obtained from the sensor with a threshold;
Outputting the biological information of the subject, and
In the body movement comparison step, the threshold corresponding to each of a plurality of biological information parameters and a storage unit that holds an output method when the body movement information is larger than the threshold correspond to the biological information parameters to be measured. The threshold value and the output method are read, the body movement information is compared with the read threshold value,
In the output step, when it is determined that the body motion information is larger than the threshold value, a program that performs output related to the biological information parameter to be measured according to the output method read in the body motion comparison step .

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