JP6406854B2 - Walking test system - Google Patents

Description

  The present invention relates to a gait test system used for, for example, a test for confirming the effects of respiratory rehabilitation and 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 intra-hour walking test, the subject is made to walk as far as possible at a distance of, for example, 30 m as long as possible, and the walking distance, SpO ₂ (arterial oxygen saturation), and pulse are measured at this time. In the walking test in time, it is allowed to stop due to shortness of breath on the way or rest against the wall.

A pulse oximeter is used for the effect confirmation test of such respiratory rehabilitation. 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 through the living body part as a pulse signal, so that SpO _{2 is used.} Ask for. The pulse oximeter is generally capable of measuring a pulse in addition to SpO ₂ (see, for example, Patent Document 1).

JP 2007-289462 A

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

By the way, the subject often becomes suffocating and rests during the walking test, and SpO ₂ and pulse values are recovered during the rest. However, in the conventional walking test, only the walking distance is used as the exercise parameter, and is the recovery of the subject's condition from the walking distance alone due to the rest or due to the effects of rehabilitation or drug administration? It is difficult to judge at a glance. Therefore, the conventional respiratory rehabilitation and drug administration effect confirmation tests are still insufficient for quantitative evaluation.

  The present invention has been made in consideration 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 aspect of the walking test system of the present invention is:
A walking state acquisition unit that acquires a walking state of the subject per unit time; and
A display unit that displays the transition of the walking state per unit time acquired in a walking test before and after drug administration for the same subject on the same graph,
It comprises.

  According to the present invention, it is possible to more accurately and easily confirm the effects of respiratory rehabilitation and drug administration.

Schematic which shows the whole structure of the walking test system which concerns on embodiment Block diagram showing the main configuration of the pulse oximeter The block diagram which shows the principal part constitution of the tablet terminal Figure showing the menu screen Figure showing the input screen Display example of measurement results before drug inhalation Display example of measurement results after drug inhalation An example in which NSPS changes in the gait test conducted before drug aspiration and NSPS changes in the gait test conducted after drug aspiration are displayed on the same graph. Example of walking test report in time Example of walking test report in time

  First, the process that led to the present invention will be described.

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

Then, it was found that the rest time and the patient walking speed during the test had the following influence on the result determination.
Oxygen desaturation (decrease in SpO ₂ ) is improved after the break, and the data tends to be better than the ability value as the break is taken.
・ The walking test evaluates biological information (SpO ₂ and pulse) when the subject walks with maximum effort in the first place, but when walking slowly, the burden on the subject is light. Normal evaluation is not possible.

That is, the inventors considered the relationship between the break and walking speed, the SpO ₂ and the pulse, although the evaluation items SpO ₂ and the pulse are greatly affected by the break and the walking speed. Since it was not done, it was considered that it was insufficient for evaluating the walking test.

Therefore, in the present invention, time-dependent parameters such as instantaneous walking speed are 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. As a result, the effects of respiratory rehabilitation and drug administration can be confirmed more accurately and easily.

  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 the overall 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 based on the Bluetooth (registered trademark) standard. The pulse oximeter 100 transmits measurement data to the tablet terminal 200 wirelessly. 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 includes a main body part 110 and a probe part 120. The main body part 110 and the probe part 120 are connected via a cable 130. The main body 110 can be mounted near the wrist of the subject using a belt (not shown), and the probe unit 120 can be mounted on the finger of the subject.

  FIG. 2 is a block diagram showing a main configuration of the pulse oximeter 100. The probe unit 120 of the pulse oximeter 100 is provided with 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, wavelength 660 [nm]) that is highly sensitive to changes in arterial oxygen saturation, and infrared light that is less affected by arterial oxygen saturation (for example, And a second light emitting diode that emits light at a wavelength of 940 [nm]). The light receiving unit 122 includes a photodiode, and detects the light of the light emitting unit 121 that has passed through the finger. Note that the light receiving unit 122 may be arranged not in the light transmission path from the finger but in the light reflection path from the finger, and the light reception unit 122 may detect the reflected light from the finger.

The main body 110 obtains the subject's SpO ₂ and pulse based on the detection light obtained by the probe unit 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 unit 121 to emit light alternately at a predetermined interval. The transmitted light or reflected light from the finger at that time is detected by the light receiving unit 122, subjected to photoelectric conversion, and input to the light receiving circuit 112. The light receiving circuit 112 converts the current signal input from the light receiving unit 122 of the probe unit 120 into a voltage signal. In addition, the light receiving circuit 112 demodulates the two observation signals by separating the converted voltage signal into the components corresponding to the wavelengths of the red light and the infrared light described above. In addition, the light receiving circuit 112 performs processing such as amplification and analog-digital conversion on the demodulated observation signal, and outputs the processed observation signal to the CPU 113.

The CPU 113 calculates SpO ₂ and the pulse from the observation signal by executing a predetermined program. Since this calculation method is a known technique as described in Patent Document 1, for example, description thereof is omitted here. The CPU 113 controls each part of the pulse oximeter 100. Specifically, the CPU 113 performs various settings based on operation signals input from the operation unit 117. 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 such a configuration, an acceleration sensor 118 is provided in the main body 110 of the pulse oximeter 100. CPU 113 measures the number of steps of the subject based on the output of 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 the subject has walked.

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

  As illustrated in FIG. 3, the tablet terminal 200 includes a display unit 210 including a liquid crystal display with a touch panel and a communication unit 211 that wirelessly receives measurement data transmitted from the pulse oximeter 100. The tablet terminal 200 inputs the number of steps in 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 includes, for example, the number of steps per second (hereinafter, this index is referred to as NSPS (the Number of Steps walked Per Second)), the walking speed per unit time, and the like. In the case of the present embodiment, the walking state calculation unit 212 calculates NSPS. In this embodiment, NSPS (steps / second) is 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 for calculating NSPS is not limited to 5 seconds. However, if the interval is too long, it will be difficult to determine whether or not a break has occurred.

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

  In addition, you may comprise so that the calculation process of the walking state per unit time performed by the walking state calculation part 212 may be performed by CPU213.

  Moreover, the structure which acquires the walking state per unit time is not restricted to the structure acquired by the acceleration sensor 118 and the walking state calculation part 212 which were mentioned above. For example, the walking state per unit time may be acquired by providing the tablet terminal 200 with a mode for inputting the number of steps per unit time visually counted by a medical worker. In this way, 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 calculation 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 measurement results 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 for the in-time walking test 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 activated. In the case of the example in FIG. 4, items “input”, “measurement”, “result”, and “setting” are displayed as menus, and processing of items tapped by the user (inspector) is executed.

  When the user taps the “input” item, an input screen as shown in FIG. 5 is displayed. The subject information can be input using the input screen of FIG. As for the input of the subject information, 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) held in the storage unit 114 of the pulse oximeter 100 is displayed. , Date of birth, gender, height, weight) and setting information (walking time to test, 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 weight. When the “registration” item is tapped on the input screen of FIG. 5, the tablet terminal 200 registers the currently displayed subject information and setting information. When the “return to menu” item is tapped, the menu screen of FIG. 4 is displayed.

6, 7 and 8 show display examples according to the present embodiment. The example of FIGS. 6-8 is a display example of a measurement result when a COPD patient is subjected to a 6-minute walking test. 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 see at a glance whether the cause of the recovery of the SpO ₂ and pulse values is due to a rest (“stop” in the figure) or a slow walking speed, or due to the effects of rehabilitation or drugs. It will be possible to judge. 6 shows measurement results before inhaling a drug such as a bronchodilator, and FIG. 7 shows measurement results after inhaling the drug.

6 and 7, the medical staff can recognize when the subject stopped walking from the NSPS value. And by comparing the transition of NSPS and the transition of SpO ₂ , if the value of SpO ₂ increases (improves) immediately after stopping walking, it is increased by a break (“Stop” in the figure). Yes, it can be evaluated that it was not increased (improved) by the effects of rehabilitation and drugs.

  Moreover, as shown in FIG. 8, if the transition of NSPS1 in the gait test conducted before drug aspiration and the transition of NSPS2 in the gait test conducted after drug aspiration are displayed on the same graph, The effect 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 for stopping walking (time for resting) is shorter than NSPS1 before drug inhalation. it can. In addition, after drug aspiration, the period from the start of walking until the patient stops walking for the first time (the period until the value becomes 0) is extended. Thereby, it can be judged that the patient's exercise tolerance is improved as a therapeutic effect of the drug.

Note that the SpO ₂ , pulse, and NSPS waveforms are color-coded and displayed on the same graph. In addition, the color of each waveform of SpO ₂ , pulse, NSPS and the color of the scale display of each waveform are displayed in association with each other. 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, the visibility when different parameters are displayed on the same graph is improved.

  FIG. 9 and FIG. 10 show an example of an in-time walking test report created and displayed by the tablet terminal 200.

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

The report shown in FIG. 10 is an example in which the transition of NSPS1 in a gait test performed before drug aspiration and the transition of NSPS2 in a gait test performed after drug aspiration are displayed on the same graph. In addition, the total walking distance, number of steps, NSPS average, stop time, ΔBorg scale, minimum SpO ₂ and SpO ₂ average values in each walking test are also displayed, and these values are plotted and displayed on the radar chart. Yes. In addition, the name of the inhaled drug is 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, SpO ₂ and / or pulse are displayed by displaying the change of SpO ₂ and pulse and the change of the number of steps per unit time on the same graph. The relationship between the number of steps per unit time, which has a significant impact on the blood flow, and the relationship between SpO ₂ and pulse can be clearly understood, so that the effects 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 was displayed on the same graph. The effect of administration can be confirmed accurately and easily. 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 for 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, but instead of this, for example, the walking speed per unit time or the unit per unit time The walking distance may be used.

In the above-mentioned embodiment, the pulse oximeter 100, device SpO _2, receives the information of the pulse and the number of steps, to display a transition of SpO ₂ and pulse rate, per unit time step count transition and the 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. In the above-described embodiment, the case where the pulse oximeter 100 is used as an apparatus for measuring SpO ₂ , pulse and step count information is described. However, the present invention is not limited to the pulse oximeter 100, but the main point is SpO ₂ , pulse. In addition, a biological information measuring device that can measure information on the number of steps may be used. Further, only the original data for SpO ₂ , pulse and step count is measured by the biological information measuring device, and the final value of SpO ₂ , pulse and walking state per unit time is obtained by calculation on the display device side. Good.

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

6 and 7 show an example in which the transition of SpO ₂ and pulse and the transition of NSPS are displayed on the same graph, it is not necessarily displayed on the same graph. ₂ and pulse transitions and NSPS transitions may be displayed with the time axis aligned. For example, when the horizontal axis is the time axis, the SpO ₂ and / or pulse transition graphs and NSPS transition graphs are displayed side by side in the vertical direction (vertical direction). May be. However, as shown in FIG. 6 and FIG. 7, if the transition of SpO ₂ and pulse and the transition of NSPS are displayed on the same graph, the relationship between the change of SpO ₂ and pulse and the change of NSPS is displayed. Becomes easier to understand.

  The above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

  The present invention can be used for a pulmonary rehabilitation or drug administration effect confirmation test.

DESCRIPTION OF SYMBOLS 1 Walking test system 100 Pulse oximeter 110 Main part 111 Light emission circuit 112 Light reception 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 calculation unit NSPS Steps per second

Claims (4)

A walking state acquisition unit that acquires a walking state of the subject per unit time; and
A display unit that displays the transition of the walking state per unit time acquired in a walking test before and after drug administration for the same subject on the same graph,
A walking test system comprising: A biological information measuring unit that measures the biological information of the subject;
A walking state acquisition unit for acquiring a walking state per unit time of the subject; and
For each before and after drug administration, the transition of the biological information measured by the biological information measurement unit and the transition of the walking state per unit time acquired by the walking state acquisition unit are plotted on a time axis. A display unit to display together,
A walking test system comprising: In the display section, the name of the administered drug is displayed,
The walking test system according to claim 1 or 2. The display unit has SPO. ₂ The value is displayed,
The walking test system according to any one of claims 1 to 3.

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