JP2013005920A - Living body monitoring system and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily detect an abnormal generation such as the cerebral anemia in the living body without needing the measurement of electrocardiographic data.SOLUTION: A pulse measuring instrument 12 measures pulse rate based on a pulse signal from a pulse oximeter 8 attached to a finger-tip of the living body. A CVPR calculation unit 13 calculates the CVPR based on a pulse rate measured by the pulse measuring instrument 12. A control unit 18 displays a comfortable degree of the living body based on the CVPR (coefficient of variation of pulse rate) calculated by the CVPR calculation unit 13, and controls a display unit 22 to display the tension degree of the living body based on an increase or decrease in past eight beats of the pulse rate measured by the pulse measuring instrument 12. The control unit 18 informs that there is a possibility of abnormality such as the cerebral anemia to occur in the living body, when the pulse rate measured by the pulse measuring instrument 12 decreases more than eight beats in series, and the CVPR calculated by the CVPR calculation unit 13 exceeds a preset threshold, for example, ≥7%.

Description

  The present invention relates to a biological monitoring system for monitoring a biological state.

  In recent years, with the increase in the number of elderly people due to longevity and aging, cases of various treatments for patients with diseases such as hypertension and ischemic heart disease are increasing. When such a patient is treated with anesthesia or for a long time, the possibility of an unexpected situation increases.

  Therefore, for example, in dental treatment, when anesthesia is involved, a system for monitoring a patient's biological condition has been developed in order to ensure patient safety (for example, Non-Patent Document 1).

  There has also been proposed a monitoring system that determines whether or not a biological function is functioning normally by observing the state of an autonomic nerve (see, for example, Patent Document 1).

  This Patent Document 1 discloses a biological monitoring method that detects a change in the degree of autonomic nerve activity over time during medical practice, etc., and warns the patient when a patient's abnormal response is predicted and stops the therapeutic action. Has been.

  However, in such a conventional biological monitoring system, biological information such as a patient's pulse rate, blood pressure value, and autonomic nerve activity index is only measured and displayed at regular time intervals.

  Moreover, in said patent document 1, in order to obtain biological information, such as an autonomic nerve activity index, it is necessary to measure electrocardiogram data with an electrocardiograph etc., and time and effort, such as mounting an electrode on a living body to be monitored, are required. There is a problem that it takes.

JP 2005-261777 A

Joe Kaneko et al., Edited by "Monitoring Guide for Measuring, Watching and Reading", Ishiyaku Shuppan Publishing Co., Ltd., October 20, 2004

  The above-described conventional living body monitoring system has a problem that since it requires measurement of electrocardiogram data and the like, it takes much time to measure living body information and cannot easily monitor the state of the living body.

  An object of the present invention is to provide a living body monitoring system capable of easily detecting the occurrence of an abnormality such as cerebral anemia in a living body without requiring measurement of electrocardiographic data or the like.

[Biological monitoring system]
In order to achieve the above object, the biological monitoring system of the present invention comprises a pulse measuring means for measuring the pulse rate of a living body,
Display means for displaying biological information;
CVPR calculating means for calculating a pulse rate variation coefficient based on the pulse rate measured by the pulse measuring means;
The comfort level of the living body is displayed based on the pulse rate variation coefficient calculated by the CVPR calculating means, and the tension level of the living body is displayed based on the increase or decrease of the pulse rate measured by the pulse measuring means in the past predetermined number of times. When the pulse rate measured by the pulse measuring means is continuously reduced by a preset number of times or more and the pulse rate variation coefficient becomes a preset threshold value or more by controlling the display means, Control means for notifying that there is a possibility that an abnormality will occur.

  According to the present invention, since only the pulse measuring means needs to be attached to the living body, it is possible to easily monitor the state of the living body as compared with the case where an electrocardiograph or the like is attached, and the value of CVPR and the pulse Since the fact that there is a possibility that an abnormality may occur in the living body is displayed based on the fact that the number is continuously decreasing, the living body can be detected with higher accuracy than when only the pulse rate is monitored. Can be monitored.

In addition, another living body monitoring system of the present invention includes a receiving unit that receives a pulse rate of a living body measured by the pulse measuring unit,
Display means for displaying biological information;
CVPR calculating means for calculating a pulse rate variation coefficient based on the pulse rate received by the receiving means;
The degree of comfort of the living body is displayed based on the pulse rate variation coefficient calculated by the CVPR calculating means, and the degree of tension of the living body is displayed based on the increase / decrease of the pulse rate received by the receiving means in the past predetermined number of times. When the pulse rate received by the receiving unit is controlled by the display unit and continuously decreases by a preset number of times or more, and the pulse rate variation coefficient becomes a preset threshold value or more, there is an abnormality in the living body. And a control means for informing that there is a possibility of occurrence of

[program]
The program of the present invention includes a step of measuring the pulse rate of a living body,
Calculating a pulse rate variation coefficient based on the measured pulse rate;
Displaying the degree of comfort of the living body based on the calculated pulse rate variation coefficient, and displaying the degree of tension of the living body based on the increase or decrease in the past predetermined number of measured pulse rates;
When the measured pulse rate decreases continuously for a preset number of times or more and the pulse rate variation coefficient exceeds a preset threshold value, it is notified that an abnormality may occur in the living body. And causing the computer to execute

Furthermore, another program of the present invention includes a step of receiving a measured pulse rate of a living body,
Calculating a pulse rate variation coefficient based on the accepted pulse rate;
Displaying the degree of comfort of the living body based on the calculated pulse rate variation coefficient, and displaying the degree of tension of the living body based on the increase or decrease in the past predetermined number of received pulse rates;
When the received pulse rate continuously decreases more than a preset number of times, and the pulse rate variation coefficient is equal to or greater than a preset threshold value, a notification is made that an abnormality may occur in the living body. Causing the computer to execute the steps.

  As described above, according to the present invention, it is possible to obtain an effect that the occurrence of an abnormality such as cerebral anemia in a living body can be easily detected without requiring measurement of electrocardiographic data or the like.

It is a block diagram which shows the structure of the biological monitoring system of one Embodiment of this invention. It is a flowchart which shows operation | movement of the biological monitoring system of one Embodiment of this invention. It is a figure which shows the example of a display in the biological monitoring system of one Embodiment of this invention. It is a figure which shows an example of the actual data when abnormality has generate | occur | produced in the biological body currently monitored. It is a figure which shows the example of a display when the abnormality of a biological body is detected in the biological monitoring system of one Embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a living body monitoring system according to an embodiment of the present invention.

  As shown in FIG. 1, the living body monitoring system of the present embodiment includes a pulse oximeter 8, a pulse measuring device 12 that measures a pulse rate (PR) of the living body, and a CVPR (Coefficient of Variation of Pulse Rate). : Pulse rate variation coefficient) calculating unit 13, control device 18, storage device 20, and display device 22 for displaying biological information.

  The pulse measuring device 12 measures the pulse rate based on the pulse signal from the pulse oximeter 8 attached to the fingertip of the living body (measurement subject, patient). Instead of the pulse oximeter 8, the pulse rate is measured by using a pulse sensor from a pressure sensor for measuring the pulse rate from the radial artery of the living body or a manchette (or cuff) used for blood pressure measurement. You may make it do.

  The CVPR calculation unit 13 calculates CVPR based on the pulse rate measured by the pulse measuring device 12.

CVPR is a coefficient indicating the degree of variation in pulse rate (PR). Specifically, this CVPR is calculated by the following equation.
CVPR = standard deviation of pulse rate / average value of pulse rate × 100 (%)

  Here, the standard deviation of the pulse rate is, for example, the standard deviation of the pulse rate in a predetermined period of 30 seconds or a predetermined number of heartbeats such as 40 beats. The average value of the pulse rate is, for example, the average value of the pulse rate in a predetermined period or a predetermined number of heartbeats.

  The control device 18 is composed of, for example, a computer, processes the biological information obtained by the pulse measuring device 12 and the CVPR calculation unit 13, and stores the processed information in the storage device 20 or displays it on the display device 22.

  Specifically, the control device 18 displays the comfort level of the living body based on the CVPR (pulse rate variation coefficient) calculated by the CVPR calculation unit 13, and the past 8 beats of the pulse rate measured by the pulse measuring device 12. The display device 22 is controlled to display the degree of tension of the living body based on the increase / decrease in.

  Then, the control device 18 continuously decreases the pulse rate measured by the pulse measuring device 12 by 8 beats or more, and the CVPR calculated by the CVPR calculation unit 13 is a preset threshold value, for example, 7% or more. When it becomes, it notifies that abnormality, such as cerebral anemia, may generate | occur | produce in a biological body. As a method of notifying that there is a possibility that abnormality such as cerebral anemia may occur in the living body, the control device 18 may be a method of sounding an alarm and a method of displaying a warning on the display device 22. Conceivable.

  Next, the operation of the biological monitoring system of this embodiment will be described in detail with reference to FIG. FIG. 2 is a flowchart showing the operation of the living body monitoring system of the present embodiment.

  When the treatment is started and the monitoring of the living body state is started, the pulse measuring device 12 also starts measuring the pulse rate (step S101). When a pulse is detected (Yes in step S101), the control device 18 counts the change direction of the pulse rate for the past eight beats (step S102).

  Specifically, the control device 18 determines whether the latest pulse value of 8 beats has increased or decreased from the value of the previous 1 pulse rate, and increased. Calculate the number of beats that are decreasing and the number of beats that are decreasing. If there is no change from the previous pulse rate and the same value, the pulse rate is removed without determining increase / decrease.

  Note that the control device 18 cannot execute the above-described process until the pulse rate for the first eight beats is measured.

  Next, the CVPR calculation unit 13 calculates CVPR (pulse rate variation coefficient) based on the pulse rate measured by the pulse rate measuring device 12 (step S103).

  Then, the control device 18 causes the display device 22 to display the degree of comfort of the living body based on the CVPR calculated by the CVPR calculating unit 13 and displays the degree of tension of the living body based on the increase / decrease in the past 8 beats of the pulse rate. 22 is displayed (step S104).

  An example of the display of the living body comfort level and the living body tension level displayed on the display device 22 in this manner is shown in FIG. In the display example shown in FIG. 3, the degree of tension of the living body is shown on the display 31. In this display 31, a decrease in pulse rate is represented by a left triangle, and an increase in pulse rate is represented by a right triangle. In other words, the display example shown in FIG. 3 shows that, among the past 8 beats, 5 beats have decreased from the previous value and 3 beats have increased from the previous value. Yes. Therefore, the display is such that it can be understood that the state of the living body is rather in the calming direction.

  Further, in the display example shown in FIG. 3, the comfort level of the living body is shown on the display 32. In this display 32, for example, when the value of CVPR is 7% or more, the state of the living body is unpleasant, and when the value of CVPR is 3.5% or more and less than 7%, the state of the living body is normal. When the value of CVPR is less than 3.5%, it is displayed that the state of the living body is comfortable.

  Next, in the display device 18, the pulse rate measured by the pulse measuring device 12 continuously decreases by 8 beats or more, and it is determined whether or not the CVPR calculated by the CVPR calculation unit 13 is 7% or more. Performed (step S105).

  In this step S105, when it is determined that the pulse rate continuously decreases by 8 beats and the CVPR is 7% or more, the control device 18 indicates that an abnormality such as cerebral anemia may occur. Notification is made (step S106).

In this step S105, when it is determined that the pulse rate has not decreased continuously for 8 beats or CVPR is not 7% or more, the control device 18 returns to the process of step S101.
And while monitoring the state of the living body, such as during treatment, the processes in steps S101 to S106 are repeated.

  Next, FIG. 4 shows an example of actual data when an abnormality occurs in the living body being monitored.

  The measurement data shown in FIG. 4 shows changes over time in the measured values of the pulse rate and the CVPR, and it can be seen that the pulse rate rapidly decreases and the CVPR increases rapidly at a certain point in time. In the living body monitoring system of the present embodiment, since it is determined that there is a possibility that an abnormality has occurred in the living body based on the continuous decrease in the pulse rate and the CVPR exceeding 7%, it is shown in FIG. With the measured data, it is possible to report a biological abnormality between 300 and 400 beats.

FIG. 5 shows a display example when a living body abnormality is detected in the living body monitoring system of the present embodiment.
In the display example shown in FIG. 5, since the pulse rate has decreased continuously for the past eight beats, eight triangles in the left direction indicating a decrease in the pulse rate are lit on the display 31 indicating the degree of tension of the living body. ing. Further, since the CVPR exceeds 7%, in the display 32 indicating the comfort level of the living body, an arrow indicates an area indicating “uncomfortable”. In addition, there is a display indicating that there is a possibility of cerebral anemia.

  As described above, according to the living body monitoring system of the present embodiment, it is not only detected that the latest pulse rate is continuously decreased by 8 beats, but also based on only the value of CVPR. Instead, when both a continuous decrease in the pulse rate of 8 beats and an increase in the value of CVPR are detected, it is notified that there is a possibility that an abnormality such as cerebral anemia in the living body may occur.

  Generally, when the living body is in a resting state, the pulse rate is stable and the CVPR value is also small. When a load is applied to the living body, the pulse rate increases with CVPR if the living body is normal.

  On the other hand, when the pulse rate is increasing even though CVPR is a small value, or when the pulse rate is decreasing while CVPR is a large value, It is expected that there will be some problem in the health condition of the living body. In particular, when the CVPR is a large value but the pulse rate continuously decreases, abnormalities such as cerebral anemia, vomiting reflex, and hyperventilation may occur or may occur. Expected to be.

  In the living body monitoring system of this embodiment, only the pulse oximeter 8 is attached to the living body, and measurement can be performed very simply. It is possible to measure the heart rate and autonomic nervous function status by measuring the electrocardiographic data of the subject, but it is necessary to wear electrodes at three locations of the subject and measure blood pressure. In some cases, it is necessary to wear a cuff on the upper arm of the subject.

  That is, according to the living body monitoring system of the present embodiment, it is possible to easily detect the occurrence of an abnormality such as cerebral anemia in a living body by a very simple method without requiring measurement of electrocardiographic data or the like. .

[Modification]
In the above embodiment, the pulse oximeter 8 and the pulse measuring device 12 are provided, and the pulse rate (PR) is calculated based on the pulse rate measured by these devices. It is not limited to such a configuration. Without providing the pulse oximeter 8 and the pulse measuring device 12, a receiving means for receiving the pulse rate data from the outside is provided, and the operation is performed based on the pulse rate data received by the receiving means. You can also. By adopting such a configuration, it is not necessary to provide a pulse measuring means such as the pulse oximeter 8 or the pulse measuring device 12 in the living body monitoring system.

DESCRIPTION OF SYMBOLS 8 Pulse oximeter 12 Pulse measuring device 13 CVPR calculation part 18 Control apparatus 20 Memory | storage device 22 Display apparatus 31 The display which shows the tension degree of a biological body 32 The display which shows the comfort level of a biological body

Claims (4)

A pulse measuring means for measuring the pulse rate of a living body;
Display means for displaying biological information;
CVPR calculating means for calculating a pulse rate variation coefficient based on the pulse rate measured by the pulse measuring means;
The comfort level of the living body is displayed based on the pulse rate variation coefficient calculated by the CVPR calculating means, and the tension level of the living body is displayed based on the increase or decrease of the pulse rate measured by the pulse measuring means in the past predetermined number of times. When the pulse rate measured by the pulse measuring means is continuously reduced by a preset number of times or more and the pulse rate variation coefficient becomes a preset threshold value or more by controlling the display means, Control means for notifying that there is a possibility that an abnormality will occur,
A biological monitoring system. Receiving means for receiving the pulse rate of the living body measured by the pulse measuring means;
Display means for displaying biological information;
CVPR calculating means for calculating a pulse rate variation coefficient based on the pulse rate received by the receiving means;
The degree of comfort of the living body is displayed based on the pulse rate variation coefficient calculated by the CVPR calculating means, and the degree of tension of the living body is displayed based on the increase / decrease of the pulse rate received by the receiving means in the past predetermined number of times. When the pulse rate received by the receiving unit is controlled by the display unit and continuously decreases by a preset number of times or more, and the pulse rate variation coefficient becomes a preset threshold value or more, there is an abnormality in the living body. Control means for notifying that there is a possibility of occurrence of,
A biological monitoring system. Measuring a biological pulse rate;
Calculating a pulse rate variation coefficient based on the measured pulse rate;
Displaying the degree of comfort of the living body based on the calculated pulse rate variation coefficient, and displaying the degree of tension of the living body based on the increase or decrease in the past predetermined number of measured pulse rates;
When the measured pulse rate continuously decreases more than a preset number of times, and the pulse rate variation coefficient is equal to or greater than a preset threshold value, it is notified that an abnormality may occur in the living body. For causing a computer to execute the step to perform. Receiving the measured biological pulse rate;
Calculating a pulse rate variation coefficient based on the accepted pulse rate;
Displaying the degree of comfort of the living body based on the calculated pulse rate variation coefficient, and displaying the degree of tension of the living body based on the increase or decrease in the past predetermined number of received pulse rates;
When the received pulse rate continuously decreases more than a preset number of times, and the pulse rate variation coefficient is equal to or greater than a preset threshold value, a notification is made that an abnormality may occur in the living body. A program for causing a computer to execute steps.