JP6630750B2 - Walking test system - Google Patents

Description

  The present invention relates to a walking test system used for, for example, respiratory rehabilitation and a test for confirming the effect of drug administration.

As a test for confirming the effect of respiratory rehabilitation, there is an in-time walking test such as a 6-minute walking test. In the walking test in time, the subject is allowed to walk back and forth at a distance of, for example, 30 m for a certain period of time as much as possible, and the walking distance, SpO ₂ (arterial blood oxygen saturation), and pulse are measured. In the time walking test, it is permissible to stop for shortness of breath and to rest on the wall.

A pulse oximeter is used for such a respiratory rehabilitation effect confirmation test. The pulse oximeter is attached to a predetermined living body part of a subject, outputs light toward the living body part, and measures a change in the amount of light transmitted or reflected by the living body part as a pulse signal, thereby obtaining SpO _2. Ask for. In addition, a pulse oximeter can generally measure a pulse in addition to SpO ₂ (for example, see Patent Document 1).

JP 2007-289462 A

As described above, in the conventional test for confirming the effect of respiratory rehabilitation, a walking distance is used as a motion parameter (or a load parameter) given to a subject, and SpO ₂ and a pulse are used as parameters of biological information. ing.

By the way, the subject often becomes suffocated during the walking test and takes a break, and during this break, the values of SpO ₂ and the pulse are recovered. However, in the conventional walking test, only the walking distance is used as the exercise parameter, and whether the condition of the subject has recovered from the walking distance alone is due to a break or due to the effects of rehabilitation and drug administration. Is difficult to judge at a glance. Therefore, conventional tests for confirming the effects of respiratory rehabilitation and drug administration are still insufficient for quantitative evaluation.

  The present invention has been made in view of the above points, and provides a walking test system capable of more accurately and easily confirming the effects of respiratory rehabilitation and drug administration.

One embodiment of the walking test system of the present invention is:
The terminal device from the measuring device attached to the subject, the biological information data including at least SpO _2, and transmits the walking data, the measurement data including the terminal apparatus of the subject within the test time vivo It is a walking test system that acquires the relationship between information and the walking state ,
The measurement device has a biological information measurement unit that measures biological information including the SpO ₂ of the subject, and a walking state acquisition unit that acquires a walking state of the subject in seconds .
The terminal device has a display unit that graphically displays the biological information including the SpO ₂ transmitted from the measurement device and the walking state in seconds .
The terminal device has a function of creating a walking report within time including the graph, in addition to a function of displaying the biological information including the SpO ₂ and the walking state in seconds in a graph,
The terminal device includes the time at which the drug was administered and / or the name of the drug in the walking report within time.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to confirm the effect by respiratory rehabilitation and drug administration more accurately and easily.

Schematic diagram showing the overall configuration of a walking test system according to an embodiment Block diagram showing the main configuration of the pulse oximeter Block diagram showing the main configuration of a tablet terminal Diagram showing the menu screen Diagram showing input screen Display example of measurement results before inhalation of drug Display example of measurement result after inhalation of drug Example in which the transition of NSPS in the walking test performed before the drug inhalation and the transition of NSPS in the walking test performed after the drug inhalation are displayed on the same graph. Example of walking test report in time Example of walking test report in time

  First, the process leading to the present invention will be described.

  The inventors of the present invention have found that among subjects of a walking test, patients with chronic obstructive pulmonary disease (COPD) and severely ill patients cannot continue walking during the test time, and have difficulty breathing. Focused on taking several breaks during the exam.

And it was found that the break time and the patient walking speed during the test had the following effects on the result judgment.
-Oxygen desaturation (reduction of SpO ₂ ) is improved after a break, and the more the break, the better the data becomes.
The walking test evaluates the biological information (SpO ₂ and pulse) when the subject walks with maximum effort, but when walking slowly, the load on the subject is light. , Cannot be evaluated normally.

In other words, the inventors consider that the relationship between the break and the walking speed and the SpO ₂ and the pulse is conventionally considered, although the evaluation items SpO ₂ and the pulse are greatly affected by the rest and the walking speed. Since it was not performed, it was considered that it was insufficient to evaluate the walking test.

Therefore, in the present invention, a time-dependent parameter such as an instantaneous walking speed is introduced into the walking test. Actually, the transition of the walking state per unit time is displayed together with the transition of SpO ₂ and / or the pulse. This makes it possible to more accurately and easily confirm the effects of respiratory rehabilitation and drug administration.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Overall configuration>
FIG. 1 is a schematic diagram showing an entire configuration of a walking test system according to an embodiment of the present invention. The walking test system 1 includes a pulse oximeter 100 and a tablet terminal 200. The pulse oximeter 100 and the tablet terminal 200 have a function capable of wireless communication with each other. In the case of the present embodiment, the pulse oximeter 100 and the tablet terminal 200 are capable of short-range communication conforming to the Bluetooth (registered trademark) standard. The pulse oximeter 100 wirelessly transmits the measurement data to the tablet terminal 200. The tablet terminal 200 collects the measurement data received from the pulse oximeter 100, displays the measurement result, and creates a walking test report.

  The pulse oximeter 100 has a main body 110 and a probe 120. The main body 110 and the probe 120 are connected via a cable 130. The main body unit 110 can be worn near the wrist of the subject using a belt (not shown), and the probe unit 120 can be worn on the finger of the subject.

  FIG. 2 is a block diagram illustrating a main configuration of the pulse oximeter 100. The probe unit 120 of the pulse oximeter 100 includes a light emitting unit 121 and a light receiving unit 122. The light emitting unit 121 includes a first light emitting diode that emits red light (for example, a wavelength of 660 [nm]) having high sensitivity to a change in arterial blood oxygen saturation, and an infrared light (for example, an infrared light that is less affected by arterial blood oxygen saturation). And a second light emitting diode that emits light at a wavelength of 940 [nm]. The light receiving unit 122 is configured by a photodiode, and detects light of the light emitting unit 121 transmitted through the finger. Note that the light receiving unit 122 may be arranged on the reflection path of light from the finger instead of the transmission path of light from the finger, and the light reception unit 122 may detect reflected light from the finger.

The main body 110 obtains SpO ₂ and the pulse of the subject based on the detection light obtained by the probe 120. This will be specifically described. The light emitting circuit 111 causes the first light emitting diode and the second light emitting diode of the light emitting section 121 to emit light alternately at predetermined intervals. The transmitted light or reflected light from the finger at that time is detected by the light receiving unit 122, photoelectrically converted, and input to the light receiving circuit 112. The light receiving circuit 112 converts a current signal input from the light receiving unit 122 of the probe unit 120 into a voltage signal. The light receiving circuit 112 separates the converted voltage signal into components corresponding to the wavelengths of the red light and the infrared light, and demodulates two observation signals. Further, the light receiving circuit 112 performs processing such as amplification and analog-to-digital conversion on the demodulated observation signal, and outputs the processed observation signal to the CPU 113.

CPU113, by executing a predetermined program, to calculate the SpO ₂ and pulse rate from the observed signal. Since this calculation method is a known technique as described in, for example, Patent Document 1, its description is omitted here. Further, the CPU 113 controls each part of the pulse oximeter 100. Specifically, the CPU 113 performs various settings based on an operation signal input from the operation unit 117. Further, the CPU 113 performs operation control of the light emitting circuit 111, display control of the display unit 115, communication control of the communication unit 116, and the like.

  In addition to this configuration, an acceleration sensor 118 is provided in the main body 110 of the pulse oximeter 100. The CPU 113 measures the number of steps of the subject based on the output of the acceleration sensor 118. That is, the acceleration sensor 118 and the CPU 113 function as a step count measurement unit that measures the number of steps taken by the subject.

The pulse oximeter 100 transmits the measured SpO ₂ , pulse, and step count to the tablet terminal 200 by the communication unit 116 in real time.

  As shown in FIG. 3, the tablet terminal 200 includes a display unit 210 including a liquid crystal display with a touch panel, and includes a communication unit 211 that wirelessly receives measurement data transmitted from the pulse oximeter 100. The tablet terminal 200 inputs the number of steps from the information received from the pulse oximeter 100 to the walking state calculation unit 212.

  The walking state calculation unit 212 calculates a walking state per unit time based on the input number of steps. The walking state per unit time is, for example, the number of steps per second (hereinafter, this index is called NSPS (the Number of Steps walked Per Second)), the walking speed per unit time, and the like. In the case of the present embodiment, walking state calculation section 212 calculates NSPS. In the case of the present embodiment, NSPS (steps / second) was calculated by dividing the number of steps for 5 seconds by the number of seconds, that is, 5. That is, NSPS was calculated every 5 seconds. The interval at which this NSPS is calculated is not limited to 5 seconds, but if it is too long, it will not be possible to know whether or not a break has taken place, so it is preferable to calculate at intervals of 10 seconds or less.

  The CPU 213 displays a measurement result on the display unit 210 and creates a report according to an application program for performing a walking test stored in the storage unit 214.

  The calculation process of the walking state per unit time performed by the walking state calculation unit 212 may be configured to be performed by the CPU 213.

  Further, the configuration for obtaining the walking state per unit time is not limited to the configuration obtained by the acceleration sensor 118 and the walking state calculation unit 212 as described above. For example, by providing the tablet terminal 200 with a mode for inputting the number of steps per unit time visually counted by a medical worker, a walking state per unit time may be acquired. By doing so, the acceleration sensor 118 and the walking state calculation unit 212 can be omitted. However, if the walking state per unit time is acquired by the acceleration sensor 118 and the walking state calculating unit 212 as in the embodiment, the walking state per unit time can be easily acquired.

<Display of measurement results and creation of walking test report>
Next, display of a measurement result and creation of a walking test report by the walking test system of the present embodiment will be described.

  FIG. 4 shows a menu screen of a walking test within time displayed on the display unit 210 of the tablet terminal 200. This menu screen is displayed when the application of the tablet terminal 200 is started. In the case of the example of FIG. 4, items of “input”, “measurement”, “result”, and “setting” are displayed as a menu, and processing of the item tapped by the user (inspector) is executed.

  When the user taps the item of “input”, an input screen as shown in FIG. 5 is displayed. The subject information can be input using the input screen of FIG. The input of the subject information is performed when the tablet terminal 200 communicates with the pulse oximeter 100 when the screen of FIG. 5 is displayed, and the subject information (subject ID, name) stored in the storage unit 114 of the pulse oximeter 100. , Date of birth, gender, height, weight) and setting information (walking time for testing, recovery (recovery) time, walking detection level (that is, sensitivity when calculating the number of steps from the output of the acceleration sensor)) Done. The tablet terminal 200 calculates the BMI from the height and the weight. When the “registration” item is tapped on the input screen in FIG. 5, the tablet terminal 200 registers the subject information and the setting information that are currently displayed. When the item of "return to menu" is tapped, the screen shifts to the menu screen of FIG.

6, 7 and 8 show display examples according to the present embodiment. The examples of FIGS. 6 to 8 are display examples of measurement results when a walking test is performed on a COPD patient for 6 minutes. As shown in FIGS. 6 and 7, in the present embodiment, the transition of SpO ₂ and pulse and the transition of NSPS are displayed on the same graph. As a result, it is possible to determine at a glance whether SpO ₂ and pulse values have been recovered due to a break (“stop” in the figure) or a decrease in walking speed, or due to rehabilitation or drug effects. You will be able to judge. FIG. 6 shows a measurement result before inhaling a drug such as a bronchodilator, and FIG. 7 shows a measurement result after inhaling the drug.

Looking at the display images as shown in FIGS. 6 and 7, the medical worker can recognize when the subject has stopped walking from the value of NSPS. By comparing the transition of NSPS with the transition of SpO ₂ , if the value of SpO ₂ is increasing (improving) immediately after stopping walking, it is increasing by a break (“stop” in the figure). Yes, it can be evaluated that it did not increase (improve) due to rehabilitation or drug effects.

  Further, as shown in FIG. 8, if the transition of NSPS1 in the walking test performed before the drug inhalation and the transition of NSPS2 in the walking test performed after the drug inhalation are displayed on the same graph, Effectiveness can be evaluated. In the example of FIG. 8, it can be seen that NSPS2 after drug inhalation has a value of 0, that is, the time during which walking is stopped (rest time) is shorter than NSPS1 before drug inhalation, so that it was evaluated that there was an effect by the drug. it can. Further, after the drug is aspirated, the period from the start of walking until the patient first stops walking (the period until the value becomes 0) is extended. As a result, it can be determined that the exercise tolerance of the patient is improved as a therapeutic effect of the drug.

Note that the respective waveforms of SpO ₂ , pulse, and NSPS are color-coded and displayed on the same graph. In addition, the color of each waveform of SpO ₂ , pulse, and NSPS is displayed in association with the color of the scale display of each waveform. For example, the NSPS waveform and its scale display “0, 0.5, 1, 1.5, ₂ ” are displayed in black, and the SpO ₂ waveform and its scale display “90, 91,. , 99, 100 "are displayed in red, and the pulse waveform and its scale display," 0, 20,..., 100, 120 ", are displayed in blue. Thereby, visibility when different parameters are displayed on the same graph is improved.

  9 and 10 show examples of the walking test report within time created and displayed by the tablet terminal 200. FIG.

The report shown in FIG. 9 is an example in which a graph of a walking test after inhalation of a drug (upper graph in the figure) and a graph of a walking test before inhalation of the drug (lower graph in the figure) are displayed. In each graph, the transition of NSPS is displayed on the same graph in addition to the transition of SpO ₂ and the pulse (PR). The total walking distance in each walking test is also displayed. In the example of the figure, the total walking distance of the walking test after inhaling the drug is 188 [m], and the total walking distance of the walking test before inhaling the drug is 125 [m].

The report shown in FIG. 10 is an example in which the transition of NSPS1 in the walking test performed before inhaling the drug and the transition of NSPS2 in the walking test performed after inhaling the drug are displayed on the same graph. In addition, the total walking distance, the number of steps, the average of NSPS, the stop time, the ΔBorg scale, the minimum SpO ₂ , and the average of SpO ₂ in each walking test are also displayed, and the values are plotted and displayed on a radar chart. I have. In addition, the name of the inhaled drug is also displayed. In the example of the figure, “bronchodilator” is displayed, but a specific name of the drug may be displayed.

  6 to 10 displayed on the tablet terminal 200 can also be printed by a printer connected to the tablet terminal 200 by wire or wirelessly.

As described above, according to the walking test system of the present embodiment, the transition of SpO ₂ and the pulse and the transition of the number of steps per unit time are displayed on the same graph, so that the SpO ₂ and / or the pulse The number of steps per unit time, which has a large effect on the blood pressure, and the relationship between SpO ₂ and pulse, so that the effect of respiratory rehabilitation and drug administration can be confirmed more accurately and easily. become.

  In addition, as shown in FIG. 8, the transition of the walking state per unit time obtained in each walking test before and after drug administration to the same subject is displayed on the same graph, The effect of administration can be accurately and easily confirmed. Similarly, if the transition of the walking state per unit time obtained in each walking test before and after rehabilitation for the same subject is displayed on the same graph, the effect of rehabilitation can be confirmed accurately and easily. become. That is, the transition of the walking state per unit time acquired in different walking tests on the same subject may be displayed on the same graph.

  In the above-described embodiment, the case where the number of steps per unit time (NSPS) is used as the walking state per unit time has been described. Alternatively, for example, the walking speed per unit time, the walking speed per unit time, May be used.

In the above-described embodiment, the apparatus that receives information on SpO ₂ , pulse, and the number of steps from the pulse oximeter 100 and displays the transition of SpO ₂ and the pulse and the transition of the number of steps per unit time on the same graph. As described above, the case where the tablet terminal 200 is used has been described, but the present invention may be performed by another device such as a personal computer instead of the tablet terminal 200. Further, in the above embodiment, SpO _2, has dealt with the case of using a pulse oximeter 100 as a device for measuring the information of the pulse and the number of steps is not limited to the pulse oximeter 100, short, SpO _2, pulse rate And a biological information measuring device capable of measuring information on the number of steps. Furthermore, it is also possible to measure only the original data for SpO ₂ , pulse and the number of steps by the biological information measuring device, and to calculate the final values of SpO ₂ , pulse and the walking state per unit time on the display device side. Good.

Further, in the above-described embodiment, the case has been described where SpO ₂ and the pulse are displayed together with the transition of the walking state per unit time, but only one of SpO _{2 and the} pulse may be displayed.

Further, FIGS. 6 and 7 show an example in which the transition of SpO ₂ and the pulse and the transition of NSPS are superimposed and displayed on the same graph. However, it is not always necessary to display the transition on the same graph. _2, the transition of the pulse and the transition of the NSPS may be displayed together with the time axis. For example, when the horizontal axis is the time axis, the graph of the transition of SpO ₂ and / or the pulse and the graph of the transition of NSPS are displayed side by side in the vertical direction (vertical direction) together with the time axis of the horizontal axis. You may. However, as shown in FIGS. 6 and 7, when the transition of SpO ₂ and pulse and the transition of NSPS are superimposed on the same graph and displayed, the relationship between the change of SpO ₂ and pulse and the change of NSPS is displayed. Becomes easier to understand.

  The above-described embodiment is merely an example of a specific embodiment for carrying out the present invention, and the technical scope of the present invention should not be interpreted in a limited manner. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

  INDUSTRIAL APPLICABILITY The present invention can be used for respiratory rehabilitation and a test for confirming the effect of drug administration.

Reference Signs List 1 walking test system 100 pulse oximeter 110 main body 111 light emitting circuit 112 light receiving circuit 113, 213 CPU
114, 214 Storage unit 115, 210 Display unit 116, 211 Communication unit 117 Operation unit 118 Acceleration sensor 120 Probe unit 121 Light emitting unit 122 Light receiving unit 130 Cable 200 Tablet terminal 212 Walking state calculating unit NSPS Steps per second

Claims (2)

The terminal device from the measuring device attached to the subject, the biological information data including at least SpO _2, and transmits the walking data, the measurement data including the terminal apparatus of the subject within the test time vivo It is a walking test system that acquires the relationship between information and the walking state ,
The measurement device has a biological information measurement unit that measures biological information including the SpO ₂ of the subject, and a walking state acquisition unit that acquires a walking state of the subject in seconds .
The terminal device has a display unit that graphically displays the biological information including the SpO ₂ transmitted from the measurement device and the walking state in seconds .
The terminal device has a function of creating a walking report within time including the graph, in addition to a function of displaying the biological information including the SpO ₂ and the walking state in seconds in a graph,
The terminal device, the walking report within the time, including the time and or drug name to administer the drug,
Walking test system. The terminal device,
A first graph showing the transition of the biological information including the SpO ₂ before the administration of the drug and the transition of the walking state in seconds in the same walking report within the same time, and the living body including the SpO ₂ after the administration of the drug. A second graph showing the transition of information and the transition of the walking state in seconds .
The walking test system according to claim 1.

Images