JPH04161143A - Physical exercise recorder - Google Patents

Abstract

PURPOSE:To record the degree of a daily action of a person to be examined with high accuracy by recording simultaneously a detecting signal from a triaxial acceleration sensor installed in the person to be examined, in a recording means together with a living body signal of an electrocardiogram and blood pressure, etc., as information for showing quantitatively the degree of physical exercise of the person to be examined. CONSTITUTION:A physical exercise measuring block 6 containing a triaxial acceleration sensor 1 is installed, for instance, in the waist part, etc., being the same installing part as a long time recording portable electrocardiograph 2. A detecting signal in the triaxial direction outputted from the triaxial acceleration sensor 1 is eliminated as to its DC component by low cut filters 3a, 3b and 3C, and thereafter, supplied to an amplifier 4. In this amplifier 4, the detecting signal in the triaxial direction is added and amplified, and also, a noise component being different from acceleration signal component which follows physical exercise is eliminated by a high cut filter, and an amplifying signal is outputted to an output terminal 5, and inputted to an input terminal IN3 of a third channel of the electrocardiograph 2. Accordingly, on a magnetic tape of this electrocardiograph 2, an electrocardiogram signal is recorded in a first and a second channels, and simultaneously, a variation of the physical exercise quantity is in a third channel.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION - (Industrial Application Field) The present invention relates to a body motion recording device for simultaneously recording the living activities of a subject on a portable electrocardiograph or the like.

(Prior technology) Monitoring of circulatory physiological function during daily life using a portable electrocardiograph for long-term recording (so-called Holter electrocardiograph) or a portable automatic blood pressure monitor is useful for monitoring circulatory physiology during daily life, for example, in patients with heart disease after being discharged from the hospital. It has been widely practiced in recent years for such purposes.

The purpose of these tests is not simply to record over a long period of time, but to accurately observe changes in the patient's physiological function under everyday situations in which various factors are intertwined. It is useful for making a diagnosis and providing treatment including lifestyle guidance.

When analyzing test results, it is important to always consider whether changes in electrocardiograms, blood pressure, etc. are caused not only by the @ state, but also by what actions. Therefore, it is necessary to monitor the circulatory physiological function and at the same time record the behavior of the subject.

Incidentally, while the recording of physiological functions, that is, the recording of biological signals such as electrocardiograms and blood pressure, has become more accurate, the current situation is that records of daily living activities are kept in diaries written by the subjects themselves.

(Problem to be solved by the invention) The behavior record diary written by the subject himself/herself is subject to the subject's own subjectivity, and it is difficult to keep a detailed record of behavior since the subject is not living a daily life. Therefore, even if a behavioral record of the same subject walks, for example, it is difficult to determine whether the patient was walking quickly or walking at a leisurely pace, such as taking a walk.
It depends on the situation. However, when interpreting the responses of the circulatory system such as heartbeat and blood pressure associated with a single movement,
Considering that differences in the amount of exercise have a large influence, more accurate behavioral records are required for diagnosis and treatment.

Also, when a patient experiences a painful symptom, it is difficult to record their own actions during the symptom, so they rely on their memory to keep a behavioral diary after the symptoms have subsided. As a result, there is a problem in that records tend to be ambiguous in clinically important situations.

As described above, the subject's own behavioral diary has a problem in that it lacks objectivity and quantitative properties when trying to accurately grasp the behavior of the subject in daily life.

The present invention was proposed to solve the second problem, and aims to provide a body movement recording device that can record biological signals as well as the degree of daily activities of a subject with high accuracy. purpose.

Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, a body movement recording device according to the present invention is attached to a subject, and measures the degree of body movement of the subject by A 3-axis acceleration sensor that detects in the three-axis directions of the axis, the Y-axis, and the Z-axis, an amplifier that adds and amplifies the acceleration detection signals in the three-axis directions output from the three-axis acceleration sensor, and a It is characterized by having a recording means for simultaneously recording the output signal and biological signals such as electrocardiogram and blood pressure detected from the subject.

(Function) According to the above-described configuration, the detection signal from the 3-axis acceleration sensor is simultaneously recorded in the recording means together with biological signals such as electrocardiogram and blood pressure as information quantitatively representing the degree of physical movement of the subject. can do.

For example, if the present invention is applied to a portable electrocardiograph for long-term recording, it is possible to simultaneously record an electrocardiogram signal and a detection signal from a three-axis acceleration sensor on a magnetic tape serving as a recording means.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

The block diagram of FIG. 1 shows one embodiment of a body movement recording device according to the present invention.

The 3-axis acceleration sensor 1 worn on the subject has a piezoelectric element extending in the three axial directions of the X-axis, Y-axis, and Z-axis, with the negative end fixed, and a weight attached to the other end of the piezoelectric element. This three-axis acceleration sensor 1 detects the degree of physical activity of the subject during daily life, that is, changes in the amount of exercise associated with daily activities, in three axes directions, that is, the X-axis, Y-axis, and Z-axis, which are orthogonal to each other.

The body motion measurement block 6 including the 3-axis acceleration sensor 1 is attached to the same attachment site as the long-term recording portable electrocardiograph (Holta electrocardiograph) 2 worn by the subject, such as the waist. be done.

The three-axis direction detection signals output from the three-axis acceleration sensor 1 are supplied to an amplifier 4 equipped with a high-cut filter after DC components are removed by low-cut filters 3a, 3c, and 3c. In this amplifier 4, 3
The detection signals in the axial direction are summed and amplified, and noise components different from the acceleration signal components associated with body movement are removed by a high-cut filter, and the amplified signals are sent to the output terminal 5.
is output to.

The output signal of this body movement measurement block 6 taken out from the output terminal 5 is input to the input terminal IN3 of the third channel of the portable electrocardiograph 2 for long-term recording. Here, input terminals IN1. of the first and second channels of this electrocardiograph are connected.
A normal electrocardiogram signal detected from the subject is taken into IN2.

Therefore, on the magnetic tape of this portable electrocardiograph 2 for long-term recording, electrocardiogram signals, which are biological signals of the subject, are recorded in the first and second channels, and simultaneously with the recording of the second electrocardiogram signal. In the third channel, changes in the amount of physical exercise representing the degree of physical activity of the subject are recorded.

Figure 2 shows the acceleration waveform T corresponding to the electrocardiogram of the subject recorded on the portable electrocardiograph 2 for long-term recording and the physical movement record. These are records taken while walking intermittently, and the degree of walking can be read from changes in the acceleration waveform.Figure 2 (b) is a record taken while jogging, and Figure 2 (c) is recorded while sleeping. This is a record of

In areas where there is a lot of physical activity, as shown in 2, the acceleration waveform T has a large swing, and the degree of daily physical activity can be objectively and quantitatively read from the acceleration waveform T in 2. Therefore, it is possible to accurately grasp the amount of exercise that caused a change in the electrocardiogram.

In the above-mentioned embodiment, an acceleration waveform indicating physical activity is recorded simultaneously with an electrocardiogram, but this acceleration waveform is also recorded together with other biological signals such as body temperature, blood pressure, or brain waves. It is also possible.

[Effects of the Invention J] As explained above, according to the present invention, the degree of physical activity of the subject during daily life can be quantitatively recorded together with biological signals such as the subject's electrocardiogram. , it is possible to understand in detail the correlation between the amount of daily exercise and changes in physiological function.

Therefore, compared to the conventional diagnosis that relies on the subject's own behavioral diary, it is possible to make a diagnosis with much higher accuracy, and it is also very useful in terms of treatment, including lifestyle guidance.

In addition to simply displaying the summed detection signal from the 3-axis acceleration sensor as a waveform, by digitally processing this detection signal, it is possible to calculate heart rate, blood pressure, etc. when the subject's exercise amount is used as input information. For example, two methods that use changes in physiological functions as output information to establish response patterns in the circulatory system:

[Brief explanation of drawings]

FIG. 1 is a professional diagram showing one embodiment of the body exercise recording device according to the present invention, and FIG. 2 is a waveform diagram showing the recorded waveforms of an electrocardiogram and body exercise by the second body exercise recording device. 1... 3-axis direction acceleration sensor 2... Portable electrocardiograph for long-term recording 3a, 3b, 3c... Loca throat filter 4...
- Multiplier 6...Body exercise measurement pro Tsuk1N1...1st channel input terminal IN2...2nd channel input terminal IN3...3rd channel input terminal Agent Patent attorney Book 1 ) Takashi

Claims (1)

[Scope of Claims] A 3-axis acceleration sensor that is attached to a subject and detects the degree of body movement of the subject in three axial directions of an X-axis, a Y-axis, and a Z-axis that are orthogonal to each other; An amplifier that adds and amplifies the acceleration detection signals in each of the three axial directions output from the sensor, and an amplifier that simultaneously records the output signal from this amplifier and biological signals such as electrocardiogram and blood pressure detected from the subject. 1. A body movement recording device comprising: recording means.