JP2014094239A - Biological information display device and biological information display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological information display device and a biological information display method capable of displaying a specific measurement value with low reliability due to influence of various kinds of noises separately from a specific measurement value with high reliability with high accuracy.SOLUTION: A biological information display device includes: measuring means 100 for measuring a biological information waveform including a periodically generated specific measurement value; calculating means 130 for calculating a specific measurement value on the basis of the biological information waveform measured within a unit time specified by the measuring means; determination means 160 for determining the degree of reliability of the specific measurement value calculated by the calculating means on the basis of the biological information waveform measured within the unit time; and display means 150 for displaying a trend graph of the specific measurement values, separating the specific measurement value determined to have high reliability by the determination means from the specific measurement value determined to have low reliability.

Description

  The present invention relates to a biological information display device and a biological information display method.

  A doctor or the like grasps the state of the patient and detects an abnormality by confirming a temporal transition of a measurement value of biological information periodically generated from the patient's living body.

  However, the measured biological information includes noise caused by patient movements, disturbances, etc. If the measured value fluctuates, is the fluctuating measured value based on changes in the patient's living body? It is difficult to determine whether it is due to the influence of noise or the like, and it is important to know the reliability in order to grasp the patient's condition.

  In the conventional trend display of measured values, the trend data is displayed with some noise removed by a filter or the like, or is displayed without using a filter or the like.

  Further, as a prior art for distinguishing and displaying a highly reliable electrocardiographic waveform from an electrocardiographic waveform having low reliability, there are the following. That is, an electrocardiogram waveform transmitted wirelessly is received and the reception intensity is measured. Then, the portion where the reception intensity of the electrocardiogram waveform is lower than the threshold value is regarded as an electrocardiogram waveform having low reliability due to abnormality of the received signal, and is displayed with a thinner line than the other portions. Thus, there is a technique in which a highly reliable electrocardiographic waveform is displayed separately from an electrocardiographic waveform with low reliability (Patent Document 1).

JP 2010-57616 A

  However, the former prior art that removes and displays noise is problematic in that it is difficult to set the constants of the filter, and the actual biological information is not removed and displayed. In addition, when a filter or the like is not used, there is a problem that it is very difficult to see when there is a lot of noise and it is difficult to distinguish biometric information.

  The prior art described in the latter patent document 1 has a problem that it is impossible to distinguish and display biometric information whose reliability is lowered due to the influence of noise that does not appear as reception intensity, from biometric information with high reliability. That is, it cannot be applied to noise in the process up to the previous stage in which biological information is detected from a patient by a sensor and wirelessly transmitted. In addition, there is a problem that it cannot be applied when displaying biometric information acquired by means other than wireless transmission separately for high reliability and low reliability.

  The present invention has been made to solve such problems. That is, a specific measurement value is calculated from the measured biological information waveform, and the reliability of the calculated specific measurement value is determined based on the biological information waveform. And it distinguishes so that a specific measurement value can be identified according to reliability, and it displays as a trend graph of biometric information. This makes it possible to determine the reliability of the measured specific measurement value based on the biological information waveform used as the basis for the calculation of the specific measurement value. A biological information display device and a biological information display method capable of distinguishing and displaying high specific measurement values with high accuracy are provided.

  The above-described problems of the present invention are solved by the following means.

  (1) Measurement means for measuring a biological information waveform including a specific measurement value, and calculation means for calculating the specific measurement value based on the biological information waveform measured within a unit time designated by the measurement means; Determining the reliability of the specific measured value calculated by the calculating means based on the biological information waveform measured within the unit time, and the reliability determined by the determining means And a display unit that displays the trend graph of the specific measurement value by distinguishing the specific measurement value accordingly.

  (2) a measurement stage for measuring a biological information waveform including a specific measurement value, and a calculation stage for calculating the specific measurement value based on the biological information waveform measured within a unit time specified in the measurement stage; A determination step of determining the level of reliability of the specific measurement value calculated in the calculation step based on the biological information waveform measured within the unit time, and a reliability determined in the determination step. And a display step of displaying a trend graph of the specific measurement value separately from the specific measurement value.

  A specific measurement value is calculated from the measured biological information waveform, and the reliability of the calculated specific measurement value is determined based on the biological information waveform. Then, the specific measurement values are distinguished and displayed as a trend graph of the specific measurement values according to the reliability. This makes it possible to determine the reliability of measured specific measurement values based on the biological information waveform used as the basis for the calculation of the specific measurement values. High specific measurement values can be distinguished and displayed with high accuracy.

1 is a block diagram of a biological information display device according to an embodiment of the present invention. It is a figure which shows the trend graph of the specific measurement value displayed in the biometric information display apparatus which concerns on embodiment of this invention. The trend graph of specific measurement values displayed simultaneously on the biological information display device according to the embodiment of the present invention, the biological information waveform that is the basis for calculation of the specific measurement value at the specified time, and the measurement of the specific measurement value at the specified time It is a figure which shows the relationship between the graph of the magnitude relationship of a value and its moving average, and the dispersion | variation in a specific measurement value. The trend graph of the specific measurement value displayed simultaneously in the biological information display device according to the embodiment of the present invention, the magnitude relationship between the biological information waveform that is the basis for calculating the specific measurement value at the specified time and the specific measurement value of each lead It is a figure which shows the relationship between the graph, the measurement value of the specific measurement value in the designated time, the graph of the magnitude relation of the moving average, and the variation of the specific measurement value. The trend graph of specific measurement values displayed simultaneously on the biological information display device according to the embodiment of the present invention, the biological information waveform and the numerical value of the specific measurement value that are the basis for the calculation of the specific measurement value at the specified time, and the specified time It is a figure which shows the relationship between the measurement value of the specific measurement value in and the graph of the magnitude relationship of the moving average, and the dispersion | variation in a specific measurement value. It is a figure which shows the flowchart of the biometric information display method which concerns on embodiment of this invention.

  Hereinafter, a biological information display device and a biological information display method according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram of a biological information display apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, the biological information display device 1 according to the present embodiment includes a measurement device 100, a patient information input unit 110, a user operation unit 120, a calculation unit 130, a storage unit 140, a display unit 150, and a control unit 160. Have

  Here, the measuring apparatus 100 constitutes a measuring unit, and the arithmetic unit 130 and the control unit 160 constitute a calculating unit and a determining unit. And the display part 150 comprises a display means.

  The biological information display device 1 can be configured as an electrocardiograph or a biological information monitor, for example. Components other than the measuring device 100 of the biological information display device 1 may be configured by a personal computer.

  The measuring device 100 measures biological information. The biological information is physiological information periodically generated by the living body, and is, for example, an electrocardiogram, but may be an open blood pressure waveform or a pulse pressure waveform.

  Hereinafter, for simplicity, the measurement apparatus 100 will be described as measuring an electrocardiogram as biological information.

  The measuring apparatus 100 is digitized from an electrocardiogram that is attached to a plurality of locations on the body surface of a patient, receives an electrocardiogram, an amplifier that amplifies the electrocardiogram, a filter that removes noise from the electrocardiogram amplified by the amplifier, and the amplified and noise-removed electrocardiogram And an interface for transmitting an electrocardiogram to the control unit 160.

  The measuring apparatus 100 measures the patient's electrocardiogram by attaching electrodes to predetermined positions on the patient's body surface. In addition, the measuring apparatus 100 transmits the measured electrocardiogram to the control unit 160.

  The patient information input unit 110 is configured by a keyboard or a touch panel, for example.

  Patient information is input to the patient information input unit 110 by user key operations. The patient information is, for example, patient ID, name, age, and gender. The patient information input unit 110 transmits the input patient information to the control unit 160.

  The user operation unit 120 is configured by, for example, a keyboard or a touch panel. Note that the keyboard and touch panel constituting the user operation unit 120 may also be used as the keyboard and touch panel constituting the patient information input unit 110.

  The user operation unit 120 designates a threshold for the reliability index when determining the reliability of the specific measurement value of the electrocardiogram based on the magnitude of the reliability index calculated based on the measured electrocardiogram waveform (biological information waveform). Is input by the user. Here, the reliability index is a numerical value for determining the reliability of a specific measurement value, and indicates a statistical variation of the measured specific measurement value, for example, a standard deviation of the specific measurement value within a specified time. is there. The reliability index is a statistical variation of the fluctuation of the electrocardiogram waveform in an arbitrary time zone where the baseline can appear in the electrocardiogram waveform (between T (U) P, PQ, etc.), for example, size, standard deviation, etc. It may be. The user designates the content of the reliability index in the user operation unit.

  In the trend graph of the specific measurement value displayed on the display unit 150, the user operation unit 120 designates one of the specific measurement values plotted on the graph by time (hereinafter simply referred to as “designation time”). Is input by the user. As will be described later, each electrocardiogram waveform that is the basis for calculating the specific measurement value at the specified time is displayed on the display unit 150 together with the trend graph of the specific measurement value.

  In the trend graph of specific measurement values, the user operation unit 120 causes the measurement apparatus 100 to measure electrocardiogram waveforms of a plurality of beats of an electrocardiogram that is a basis for calculation of each specific measurement value plotted on the graph (unit time ( Hereinafter, designation of “unit time” is input by the user. The unit time can be specified, for example, every minute. Hereinafter, for the sake of simplicity, the unit time is assumed to be 1 minute.

  The user operation unit 120 transmits various specifications including the above-described specifications input by the user to the control unit 160.

  The calculation unit 130 can be configured by a CPU (Central Processing Unit), a RAM (Random Access Memory), and an HDD (Hard Disk Drive).

  The calculation unit 130 calculates a specific measurement value based on the electrocardiogram waveform measured by the measurement apparatus 100.

  For example, the calculation unit 130 can calculate a PQ interval, a QRS width, a QT interval, a QTc interval, a P wave width, a T wave width, and a U wave width, which are indices related to the time of the electrocardiogram waveform, as specific measurement values. Here, the QTc interval is a QT interval that has been corrected to eliminate the influence of the RR interval. The correction is made in consideration of an increase in the QT interval due to an increase in the RR interval.

  For example, the calculation unit 130 calculates a P wave amplitude, a Q wave amplitude, an R wave amplitude, an S wave amplitude, a T wave amplitude, a U wave amplitude, or an ST level, which is an index related to the amplitude of the electrocardiogram waveform, as a specific measurement value. May be.

  For example, when calculating the PQ interval as the specific measurement value, the calculation unit 130 can calculate the PQ interval by calculating the time from the start of the P wave to the start of the Q wave.

  The calculation unit 130 further calculates a representative value of the specific measurement value based on the electrocardiogram waveform of a plurality of beats in which the specific measurement value is measured within the unit time. The calculation unit 130 calculates a representative value of the specific measurement value based on the electrocardiogram waveform of a plurality of beats measured in the unit time in accordance with the unit time specified by the user in the user operation unit 120. That is, the calculation unit 130 calculates a representative value of the specific measurement value from a waveform (hereinafter simply referred to as “representative waveform”) based on an electrocardiogram waveform of a plurality of beats measured in the unit time. Here, the representative waveform is statistically obtained from an electrocardiogram waveform of a plurality of beats measured in the unit time, and is, for example, a waveform obtained by adding and averaging the electrocardiogram waveforms of a plurality of beats. The representative waveform may be a waveform that gives the median value of the potential of each sample of the electrocardiogram waveform of the plurality of beats. The specific measurement value plotted on the trend graph of the specific measurement value is a representative value of the specific measurement value.

  When calculating specific measurement values by means of electrocardiograms at a plurality of locations of the human body (hereinafter simply referred to as “multiple leads”), such as a 12-lead electrocardiogram, for example, the calculation unit 130 statistically calculates the specific measurement values calculated from the representative waveforms. The average value or median value obtained by performing the target process is set as the representative value of the specific measurement value. The maximum value defined as the interval between the earliest start point and the latest end point among the end points of the waveform widths that define the specific measurement values appearing in the representative waveforms may be used as the representative value. .

  The calculation unit 130 calculates a reliability index designated by the user. When the reliability index designated by the user is a variation in specific measurement values, the calculation unit 130 obtains a standard obtained by performing statistical processing on the specific measurement values of the electrocardiogram waveforms of a plurality of beats measured per unit time. Statistical variation such as deviation and root mean square can be calculated as a reliability index. When the reliability index designated by the user is the magnitude of fluctuation in an arbitrary time zone (for example, between P wave and Q wave) where the baseline can appear in the ECG waveform, the calculation unit Statistical processing is performed on the electrocardiogram waveform, and the magnitude of the fluctuation representing the statistical variation or the standard deviation of the fluctuation can be calculated as a reliability index.

  When calculating the variation of the specific measurement value, the calculation unit 130 may calculate the variation of the specific measurement value based on a statistical variation such as a standard deviation in a unit time of the specific measurement value for each beat.

  The calculation unit 130 calculates a determination value, which is a statistical value within a predetermined time, based on a representative value of consecutive specific measurement values determined to be highly reliable by the control unit 160 among the calculated representative values of the specific measurement values. calculate. This can be an average value (moving average), median value, minimum value, maximum value, etc. within a predetermined time. Hereinafter, for simplicity, a statistical value within a predetermined time will be described as a moving average.

  The storage unit 140 can be configured by an HDD.

  The storage unit 140 stores various measurement values such as the measured electrocardiogram, the specific measurement value, and the variation of the specific measurement value. The storage unit 140 further stores patient information and various designations by the user such as designation of threshold values. The storage unit 140 stores a control program for controlling each component of the biological information display device 1 executed by the control unit 160.

  The display unit 150 can be configured by a liquid crystal display.

  The display unit 150 displays the trend graph of the specific measurement value calculated by the calculation unit 130 by distinguishing between the specific measurement value with high reliability and the specific measurement value with low reliability according to the determination by the control unit 160. Further, the display unit 150 can display the moving average of the specific measurement value with high reliability superimposed on the trend graph of the specific measurement value.

  The display unit 150 displays a representative waveform that is a basis for calculating the specific measurement value at the specified time of each specific measurement value displayed in the trend graph of the specific measurement value.

  The display unit 150 includes, among the specific measurement values displayed in the trend graph of the specific measurement values, a specific measurement value at the specified time, a moving average of the specific measurement values at the specified time, and variations in the specific measurement values at the specified time. Relationships can be displayed.

  The display unit 150 associates with the representative waveform that is the basis of calculation of the specific measurement value at the specified time of each specific measurement value displayed in the trend graph of the specific measurement value, and specifies the specific value calculated based on the representative waveform The magnitude relationship of the measured values can be displayed. The display unit 150 can display the magnitude relationship as a graph or a numerical value. When displaying the magnitude relation of the specific measurement value as a numerical value, the display unit 150 can display the specific measurement value so that the maximum value and the minimum value can be identified.

  When the median value of the specific measurement values calculated based on the representative waveforms respectively measured by a plurality of leads is designated as the representative value by the user, the display unit 150 displays at least the representative waveform that gives the median value and the median value Either can be displayed in an identifiable manner.

  The display unit 150 can display the representative waveform by superimposing the display indicating the start point and the end point of the time width defining the representative value.

  The display unit 150 may further display the value of the reliability index at the designated time when the reliability index is calculated based on fluctuation in an arbitrary time zone in which the baseline can appear in the electrocardiogram waveform.

  The control unit 160 can be configured by a CPU and a RAM.

  The control unit 160 controls the components of the biological information display device 1 according to the control program stored in the storage unit 140.

  The control unit 160 transmits and stores various designations by the user such as designation of electrocardiograms, patient information, and threshold values received from the measurement apparatus 100, the patient information input unit 110, and the user operation unit 120 to the storage unit 140.

  The control unit 160 determines whether the reliability of the specific measurement value calculated by the calculation unit 130 is high or low. When the reliability index calculated by the calculation unit 130 does not exceed the threshold specified by the user, the control unit 160 determines that the specific measurement value for which the reliability index is calculated is a highly reliable specific measurement value. When the reliability index exceeds a threshold specified by the user, the control unit 160 determines that the specific measurement value for which the reliability index is calculated is a specific measurement value with low reliability. Note that a plurality of threshold values may be set, and the degree of reliability may be set to three or more levels.

  A display screen displayed on the display unit 150 of the biological information display device 1 will be described with reference to FIGS. It should be noted that which of FIGS. 2 to 5 is displayed as a display screen is determined by designation by the user in the user operation unit 120.

  FIG. 2 is a diagram illustrating a trend graph of specific measurement values displayed in the biological information display apparatus according to the present embodiment.

  The horizontal axis of the graph of FIG. 2 indicates the elapsed time in the specific measurement value measurement, and the interval between each plot indicating the measurement value of the measured specific measurement value is 1 minute. The vertical axis of the graph in FIG. 2 indicates the measured value of the QT interval, which is a specific measured value.

  Here, the specific measurement values plotted in the graph of FIG. 2 are representative values of the specific measurement values, and are average values of the QT intervals calculated based on the representative waveforms of the respective leads of the 12-lead electrocardiogram. The specific measurement value plotted on the trend graph of the specific measurement value may be a median value of the specific measurement values calculated from the representative waveforms of the respective leads of the 12-lead ECG. The plotted specific measurement values are between the earliest start point and the latest end point of each end point of each waveform width defining the specific measurement value appearing in the representative waveform of each lead of the 12-lead ECG. It may be a value defined as the interval.

  Among the plots of the graph of FIG. 2, the black rhombus plot is a specific measurement value plot with high reliability, and the white square plot is a plot with a specific measurement value with low reliability. Thus, by distinguishing and displaying the specific measurement value with high reliability and the specific measurement value with low reliability, the user can grasp the specific measurement value with low reliability in the trend graph of the specific measurement value, The true trend and change of the specific measurement value can be inferred from the specific measurement value with high reliability.

  As shown by a solid curve in FIG. 2, the moving average 200 of the specific measurement value with high reliability among the calculated specific measurement values is superimposed on the trend graph of the specific measurement values. Thus, by superimposing the moving average 200 of the specific measurement value with high reliability on the trend graph of the specific measurement value, the user can more easily and clearly infer the true trend and change of the specific measurement value. Can do. As described above, the moving average may be a median value, a minimum value, or a maximum value of representative values within a predetermined time.

  As indicated by a broken line 210 in FIG. 2, a line that is a measure of the measurement value of the specific measurement value may be superimposed on the trend graph of the specific measurement value so that the user can change it.

  FIG. 3 shows a trend graph of specific measurement values simultaneously displayed on the biological information display apparatus according to the present embodiment, a waveform that is a basis for calculation of the specific measurement value at a specified time, and measurement of the specific measurement value at the specified time. It is a figure which shows the relationship between a value, its moving average, and the dispersion | variation in a specific measurement value. In addition, what is displayed as a specific measurement value in FIG. 3 is a QT interval.

  FIG. 3A is a diagram showing a trend graph of QT intervals displayed on the biological information display device.

  The QT interval plotted in the graph of FIG. 3A is a representative value of the QT interval, and each of the leads defining the QT interval appearing in the representative waveform of each lead of the 12-lead ECG (see FIG. 3B). It is a value defined as the interval between the earliest start point among the start points and the latest end point among the end points.

  In FIG. 3A, a cursor 300 indicating the time specified by the user is further displayed on the trend graph of the QT interval. The position of the cursor 300 shown as the designated time in FIG. 3A can be changed by changing the designated time by the user.

  FIG. 3B is a diagram showing a representative waveform that is the basis for calculating the QT interval at the specified time. The symbol displayed on the left side of each representative waveform indicates the name of each lead of the 12-lead ECG.

  The waveform of each lead of the 12-lead ECG shown in B of FIG. 3 is a representative waveform for each lead, and is a waveform obtained by adding and averaging ECG waveforms of a plurality of beats measured per unit time. FIG. 3B shows a line 310 indicating the earliest start point and the latest end point of each end point of each waveform width defining the QT interval appearing in each of these waveforms.

  FIG. 3C is a diagram showing the relationship between the measured value of the QT interval at the specified time, the moving average at the specified time, and the variation in the QT interval.

  As shown in FIG. 3C, the measured value 320 of the QT interval at the specified time and the moving average 330 thereof are plotted in a graph displaying a large value toward the right in the figure to show the magnitude relationship. Yes. The value shown as the measured value of the QT interval is a representative value of the QT interval that is the QT interval plotted in A of FIG. 3, and the value shown as the moving average is displayed in A of FIG. It is the value of the moving average.

  The variation in the QT interval can be shown, for example, as the standard deviation of the QT interval for each beat calculated within the unit time in the specified time. The standard deviation, which is a variation in the QT interval, is shown as a horizontal square size 340 in FIG. 3C. In addition, it is desirable to change the color of the thick vertical solid line shown as a plot of the measured value 320 of the QT interval corresponding to the reliability of the QT interval. The level of reliability is determined by whether or not the value of the standard deviation, which is a variation in the QT interval, exceeds a threshold specified by the user.

  FIG. 4 is a trend graph of specific measurement values that are simultaneously displayed in the biological information display device according to the present embodiment, a graph of the relationship between the representative waveform and the specific measurement value that is the basis for calculation of the specific measurement value at a specified time, FIG. 6 is a diagram illustrating a relationship between a measurement value of a specific measurement value at a specified time, a moving average thereof, and variations in the specific measurement value. In addition, what is displayed as the specific measurement value in FIG. 4 is the QT interval as in FIG.

  C in FIG. 4 is the same graph as C in FIG.

  FIG. 4A is a diagram showing a trend graph of QT intervals displayed on the biological information display device.

  The QT interval plotted in the graph of FIG. 4A is a representative value of the QT interval, and is a median value of the QT interval calculated from the representative waveform of each lead of the 12-lead ECG.

  FIG. 4B is a diagram showing a representative waveform that is a basis for calculating the QT interval at the specified time and a graph of the magnitude relationship between the QT intervals.

  The left figure of B of FIG. 4 is a figure which shows the representative waveform used as the basis of calculation of the QT interval in designated time. The symbol displayed on the left side of each representative waveform indicates the name of each lead of the 12-lead ECG.

  The representative waveform of each lead of the 12-lead electrocardiogram shown in the left diagram of FIG. 4B is a representative waveform measured per unit time for each lead, and is a waveform obtained by averaging the ECG waveforms of the plurality of beats. is there.

  The right diagram in FIG. 4B is a graph showing the magnitude relationship of the measurement values by each induction of the QT interval corresponding to the representative waveform of each induction in the left diagram in FIG. 4B. The magnitude relationship of the measured values of the QT interval by each guidance is such that the measured values of the QT interval are plotted by a short vertical double line in a graph displaying a large value toward the right in the figure. It is shown.

  The representative value plotted as the QT interval in FIG. 4A is the median value of the QT interval calculated from the representative waveform of each lead of the 12-lead ECG as described above. Therefore, in the right diagram of FIG. 4B, the median value among the QT intervals calculated from the representative waveforms of the respective leads is displayed so as to be distinguishable from other plots by the plot 400 using a thick single line. The median is a QT interval calculated from a waveform obtained by adding and averaging electrocardiogram waveforms of a plurality of beats measured per unit time in the V4 channel of 12 leads. At this time, the representative waveform of the V4 induction that gives the median value may be displayed so as to be distinguishable from other waveforms.

  FIG. 5 shows a trend graph of specific measurement values simultaneously displayed in the biological information display device according to the present embodiment, the magnitude relationship between the representative waveform and the numerical value of the specific measurement value, and the measurement value of the specific measurement value at a specified time and its It is a figure which shows the relationship between a moving average and the dispersion | variation in a specific measurement value. In addition, what is displayed as the specific measurement value in FIG. 5 is the QT interval as in FIG. 3 and FIG.

  A and C in FIG. 5 are the same graphs as A and C in FIG.

  FIG. 5B is a diagram showing a representative waveform that is a basis for calculating the QT interval at the specified time and the numerical value of the QT interval.

  The right figure of B of FIG. 5 is a figure which shows the representative waveform used as the basis of calculation of the QT interval in designated time. The symbol displayed on the left side of each representative waveform indicates the name of each lead of the 12-lead ECG.

  The representative waveform of each lead of the 12-lead ECG shown in the right diagram of FIG. 5B is a representative waveform measured per unit time for each lead, and is a waveform obtained by adding and averaging the ECG waveforms of the plurality of beats. is there.

  In the right diagram of FIG. 5B, the interval from the earliest start point to the latest start point among the start points of each waveform width defining the QT interval of the representative waveform of each lead is indicated by a thick horizontal line 500, The starting point 520 is shown in the representative waveform of each lead. In addition, an interval from the earliest end point to the latest end point among the end points of each waveform width defining the QT interval appearing in the representative waveform of each lead is indicated by a thick horizontal line 510, and the end point 530 is indicated in each lead waveform. Is shown.

  The left diagram in FIG. 5B is a diagram showing numerically the QT intervals corresponding to the representative waveforms measured by the respective leads in the right diagram in FIG. 5B. In the left figure of FIG. 5B, the maximum value of the measured values by each guidance of the QT interval is surrounded by a solid thick frame, and the minimum value is surrounded by a broken thick frame. Thereby, the user can grasp at a glance the guidance in which the maximum value and the minimum value of the QT interval are measured, and can clearly grasp the QT interval measured by each guidance by a numerical value.

  FIG. 6 is a diagram illustrating a flowchart of the biological information display method according to the present embodiment. This flowchart can be implemented by the biological information display device 1 according to the present embodiment.

  The user wears the measuring apparatus 100 on the patient (S601), and inputs patient information from the patient information input unit 110 (S602).

  The control unit 160 causes the measurement apparatus 100 to measure an electrocardiogram every unit time designated by the user, and stores the measured electrocardiogram in the storage unit 140 (S603).

  The control unit 160 causes the calculation unit 130 to calculate the representative value of the QT interval from the representative waveform measured in unit time, and calculates the standard deviation of the QT interval as a reliability index based on each electrocardiogram waveform (S604).

  The control unit 160 sets the QT interval in which the standard deviation of the calculated QT interval does not exceed the threshold specified by the user as a highly reliable QT interval, and sets the QT interval exceeding the threshold as an unreliable QT interval. It distinguishes and displays on the display part 150 as a trend graph (S605).

  The control unit 160 displays the representative waveform that is the basis for calculating the QT interval at the time of the cursor position indicating the time specified by the user, and the measured value of the QT interval together with the trend graph of the QT interval (S606).

  The control unit 160 repeats steps S601 to S606 until the electrocardiogram measurement is completed (S607).

  The biological information display device and the biological information display method according to the embodiment of the present invention have been described above. However, the present embodiment has the following effects.

  A specific measurement value is calculated from the measured electrocardiogram waveform, and the reliability of the calculated specific measurement value is determined based on the electrocardiogram waveform. And the specific measurement value with high reliability and the specific measurement value with low reliability are distinguished and displayed as a trend graph of the specific measurement value. As a result, the reliability of the measured specific measurement value is judged based on the electrocardiogram waveform, so that the specific measurement value with low reliability and the specific measurement value with high reliability can be distinguished from each other with high accuracy. Can be displayed.

  In addition, the reliability of a specific measurement value is judged more reliably and accurately by judging the reliability of the specific measurement value based on the magnitude of the variation of the specific measurement value calculated based on each ECG waveform measured within the specified unit time. It is possible to display a trend graph of specific measurement values so that they can be distinguished.

  In addition, by determining the reliability of the specific measurement value calculated from the ECG waveform based on the magnitude of the fluctuation of the ECG waveform in an arbitrary time zone, it is possible to distinguish the reliability level more reliably and accurately. A trend graph of specific measurement values can be displayed.

  In addition, the true trend and change of a specific measurement value can be inferred more easily and clearly by superimposing and displaying the moving average of the specific measurement value determined to be highly reliable on the trend graph of the specific measurement value. be able to.

  Further, the reliability of the specific measurement value is determined based on the representative value based on the electrocardiogram waveform of each lead or the waveform based on the representative waveform of each lead. Thereby, even if an electrocardiogram waveform is measured in each of a plurality of leads, the reliability of the specific measurement value can be determined comprehensively and with high accuracy.

  Further, by calculating the specific measurement value based on the designated representative waveform and determining its reliability, it is possible to determine the reliability of the specific measurement value more easily and with high accuracy.

  Further, the average value, the median value, and the electrocardiogram waveform or the specific measurement value appearing on the electrocardiogram are calculated for each lead based on the electrocardiogram waveform or the representative waveform. At least one of values defined as an interval between the earliest start point of each waveform width start point and the latest end point of each end point. Thereby, the reliability of the specific measurement value can be determined flexibly and appropriately.

  In addition, the electrocardiogram waveform or the representative waveform that is the basis for calculating the specific measurement value at the specified time among the specific measurement values displayed in the trend graph of the specific measurement value is displayed together with the trend graph of the specific measurement value. Thereby, the reliability of the specific measurement value displayed on the trend graph of the specific measurement value can be determined more specifically.

  Further, among the specific measurement values displayed in the trend graph of the specific measurement value, the specific measurement value at the specified time, the moving average of the specific measurement value at the time, and the variation of the specific measurement value at the time Are displayed together with the trend graph of the specific measurement value. Thereby, the reliability of the specific measurement value displayed on the trend graph of the specific measurement value can be determined more specifically and appropriately.

  In addition, an electrocardiogram waveform or representative waveform corresponding to the electrocardiogram waveform or representative waveform that is the basis for calculation of the specific measurement value at the specified time among the specific measurement values displayed in the trend graph of the specific measurement value The magnitude relationship of the specific measurement value calculated based on the above is displayed as a graph or a numerical value together with the trend graph of the specific measurement value. Thereby, the reliability of the specific measurement value displayed on the trend graph of the specific measurement value can be determined more specifically and simply.

  In addition, when the representative value is specified as the median value of the electrocardiogram waveform measured by multiple leads or the specific measurement value calculated based on the representative waveform, the electrocardiogram waveform or the representative waveform and the specific measurement value are At least one of an electrocardiogram waveform, a representative waveform, and a median value calculated based on these waveforms are displayed in an identifiable manner. Thereby, the reliability of the specific measurement value displayed on the trend graph of the specific measurement value can be determined more flexibly and specifically.

  Further, when displaying the magnitude relation of the specific measurement value as a numerical value, the specific measurement value is displayed so that the maximum value and the minimum value of the numerical value can be identified. Thereby, the reliability of the specific measurement value displayed on the trend graph of the specific measurement value can be determined more specifically and accurately.

  The electrocardiogram waveform or the representative waveform is displayed with the display indicating the start point and the end point of the time width defining the representative value superimposed. Thereby, the reliability of the specific measurement value displayed on the trend graph of the specific measurement value can be determined more specifically and accurately.

  The biological information display device and biological information display method according to the present invention are not limited to the above-described embodiments.

  For example, in the above embodiment, the representative value as the specific measurement value is calculated from the representative waveform measured per unit time in each lead of the 12-lead electrocardiogram, but the representative value as the specific measurement value from the electrocardiogram waveform for each beat. May be calculated. Then, the reliability of the specific measurement value in that case is determined by setting the magnitude of the fluctuation of the electrocardiogram waveform or the standard deviation of the fluctuation in an arbitrary time zone when the baseline appears in the electrocardiogram waveform as a reliability index. Can be done.

  In the above embodiment, the biological information display device is described as being controlled according to a control program. However, a part or all of the control program is replaced with hardware such as a custom LSI (Large Scale Integrated Circuit). Also good.

  Moreover, in the said embodiment, the magnitude | size of the fluctuation | variation of the said electrocardiogram waveform in the time slot | zone when a baseline can appear in an electrocardiogram waveform, or the standard deviation of the said fluctuation | variation is mentioned as an example of a reliability parameter | index. However, the magnitude of the fluctuation of the electrocardiogram waveform in a time zone other than the time zone where the baseline appears in the electrocardiogram waveform, or the standard deviation of the fluctuation may be used as the reliability index.

1 biological information display device,
100 measuring device,
110 Patient information input section,
120 user operation unit,
130 arithmetic unit,
140 storage unit,
150 display section,
160 Control unit.

Claims (30)

Measuring means for measuring a biological information waveform including a specific measurement value;
Calculation means for calculating the specific measurement value based on the biological information waveform measured within a unit time designated by the measurement means;
A determination unit that determines whether the reliability of the specific measurement value calculated by the calculation unit is based on the biological information waveform measured within the unit time;
Display means for displaying a trend graph of the specific measurement value in distinction from the specific measurement value according to the reliability determined by the determination means;
A biological information display device characterized by comprising:   The determination unit is responsive to a condition specified for a variation in the specific measurement value calculated by the calculation unit based on each biological information waveform measured by the measurement unit within the specified unit time. The biological information display device according to claim 1, wherein high or low reliability is determined.   The biological information according to claim 1, wherein the determination unit determines whether the reliability of the biological information waveform is high or low according to a specified condition with respect to a magnitude of fluctuation in a specified time zone. Display device.   The specified condition is that a statistical variation of the specific measurement value calculated by the calculation unit based on each biological information waveform measured by the measurement unit within a specified unit time is equal to or less than a specified threshold value. The biological information display apparatus according to claim 2, wherein the condition is that it exists.   The biological information display device according to claim 3, wherein the designated time zone of the biological information waveform is an arbitrary time zone in which a baseline can appear in the biological information waveform.   The display means superimposes and displays a statistical value within a predetermined time of the specific measurement value determined to be highly reliable by the determination means on the trend graph of the specific measurement value. The biological information display device according to any one of 1 to 5.   The specific measurement values for which the level of reliability is determined by the determination unit are the biological information waveforms respectively measured by the measurement unit at a plurality of locations on the human body, or within a unit time designated at the plurality of locations on the human body. The representative value calculated by the calculation unit based on a waveform based on a biological information waveform of a plurality of beats measured by the measurement unit, respectively. Biological information display device.   The biological information display device according to claim 7, wherein the waveform based on the biological information waveform of the plurality of beats is a waveform obtained by averaging the biological information waveforms of the plurality of beats or a median value.   The representative value is an average value, median value, and biological information of the specific measurement values calculated for each of a plurality of locations of the human body based on the biological information waveform or a waveform based on the biological information waveform of the plurality of beats. A value defined as an interval between the earliest start point and the latest end point of each end point of each waveform width that defines the specific measurement value that appears in the waveform or the waveform based on the biological information waveform of the plurality of beats The biological information display device according to claim 7, wherein the biological information display device is at least one of the following.   The display means is configured to calculate the specific measurement value at a specified time among the specific measurement values displayed in the trend graph of the specific measurement value or the biological information waveform of the plurality of beats. The biological information display device according to claim 7, further displaying a waveform based on the waveform.   The display means includes the specific measurement value at a specified time among the specific measurement values displayed in the trend graph of the specific measurement value, and a statistical value within a predetermined time of the specific measurement value at the specified time. The biological information display device according to any one of claims 6 to 10, further displaying a relationship between the variation of the specific measurement value at the specified time.   The display means is configured to calculate the specific measurement value at a specified time among the specific measurement values displayed in the trend graph of the specific measurement value or the biological information waveform of the plurality of beats. The magnitude relationship of the specific measurement value calculated based on the biological information waveform or the waveform based on the biological information waveform of the plurality of beats is further displayed as a graph or a numerical value in association with the waveform based on The biological information display device according to claim 10 or 11.   The display means is designated as a median value of the specific measurement values calculated based on the biological information waveform measured at a plurality of locations of the human body or a waveform based on the biological information waveform of the plurality of beats. The biological information waveform or the waveform based on the multiple beat biological information waveform and the specific measurement value, the biological information waveform that gives the median, the waveform based on the multiple beat biological information waveform, and these The biological information display device according to claim 11, wherein at least one of the median values calculated based on a waveform is displayed so as to be identifiable.   The said display means displays the said specific measurement value so that the maximum value and minimum value of the said numerical value can be identified, when displaying the magnitude relationship of the said specific measurement value as a numerical value. Biological information display device.   The display means displays the waveform based on the biological information waveform or the biological information waveform of the plurality of beats by superimposing a display indicating a start point and an end point of a time width defining the representative value. The biological information display apparatus as described in any one of Claims 12-14. A measurement stage for measuring a biological information waveform including a specific measurement value;
A calculation step of calculating the specific measurement value based on the biological information waveform measured within the unit time specified in the measurement step;
A determination step of determining the level of reliability of the specific measurement value calculated in the calculation step based on the biological information waveform measured within the unit time;
A display step of displaying the trend graph of the specific measurement value by distinguishing the specific measurement value according to the reliability determined in the determination step;
A biological information display method characterized by comprising:   In the determination step, the specific measurement satisfying a specified condition by a variation in the specific measurement value calculated by the calculation unit based on each biological information waveform measured in the measurement step within the specified unit time. The biological information display method according to claim 16, wherein the value is determined to have high reliability, and the specific measurement value that does not satisfy the condition is determined to have low reliability.   In the determination step, the reliability of the specific measurement value calculated in the calculation step based on the biological information waveform that satisfies a specified condition of the magnitude of fluctuation in an arbitrary time zone of the biological information waveform is high. The biological information display method according to claim 16, wherein determination is made and it is determined that the specific measurement value that does not satisfy the condition is low in reliability.   The specified condition is that a statistical variation of the specific measurement value calculated in the calculation step based on each biological information waveform measured in the measurement step within a specified unit time is less than a specified threshold value. The biological information display method according to claim 17, wherein the condition is that there is a certain condition.   19. The biological information display method according to claim 18, wherein the designated time zone of the biological information waveform is an arbitrary time zone in which a baseline can appear in the biological information waveform.   The display step includes superimposing and displaying a statistical value within a predetermined time of the specific measurement value determined to be highly reliable in the determination step on the trend graph of the specific measurement value. Item 21. The biological information display method according to any one of Items 16 to 20.   The specific measurement value for which the level of reliability is determined in the determination step is the biological information waveform measured in the measurement step at a plurality of locations on the human body, or within a unit time specified at the plurality of locations on the human body. The representative value calculated by the calculation unit based on a waveform based on a biological information waveform of a plurality of beats measured in the measurement step, respectively. Biological information display method.   The biological information display method according to claim 22, wherein the waveform based on the biological information waveform of the plurality of beats is a waveform obtained by adding and averaging the biological information waveforms of the plurality of beats or a median value.   The representative value is an average value, median value, and biological information of the specific measurement values calculated for each of a plurality of locations of the human body based on the biological information waveform or a waveform based on the biological information waveform of the plurality of beats. A value defined as an interval between the earliest start point and the latest end point of each end point of each waveform width that defines the specific measurement value that appears in the waveform or the waveform based on the biological information waveform of the plurality of beats The biological information display method according to claim 22 or 23, wherein the biological information display method is at least one of the following.   In the display step, the biological information waveform or the multi-beat biological information waveform that is a basis for calculating the specific measurement value at a specified time among the specific measurement values displayed in the trend graph of the specific measurement value The biological information display method according to any one of claims 22 to 24, further comprising displaying a waveform based on.   The display step includes the specific measurement value at a specified time among the specific measurement values displayed in the trend graph of the specific measurement value, and a statistical value within a predetermined time of the specific measurement value at the specified time. The biological information display method according to any one of claims 21 to 25, further displaying a relationship between the variation of the specific measurement value at the specified time.   In the display step, the biological information waveform or the multi-beat biological information waveform that is a basis for calculating the specific measurement value at a specified time among the specific measurement values displayed in the trend graph of the specific measurement value The magnitude relationship of the specific measurement value calculated based on the biological information waveform or the waveform based on the biological information waveform of the plurality of beats is further displayed as a graph or a numerical value in association with the waveform based on The biological information display method according to claim 25 or 26.   In the display step, the representative value is designated as a median value of the specific measurement values calculated based on the biological information waveform measured at a plurality of positions of the human body or a waveform based on the biological information waveform of the plurality of beats. The biological information waveform or the waveform based on the multiple beat biological information waveform and the specific measurement value, the biological information waveform that gives the median, the waveform based on the multiple beat biological information waveform, and these 27. The biological information display method according to claim 26, wherein at least one of the median values calculated based on a waveform is displayed in an identifiable manner.   28. The display according to claim 27, wherein, when the magnitude relation of the specific measurement value is displayed as a numerical value, the display step displays the specific measurement value so that the maximum value and the minimum value of the numerical value can be identified. Biological information display method.   In the display step, the waveform based on the biological information waveform or the biological information waveform of the plurality of beats is displayed by superimposing a display indicating a start point and an end point of a time width defining the representative value. The biological information display method according to any one of claims 27 to 29.