JPH0329409B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a body position detecting section having at least a portion thereof a substantially flat surface that can be used as a mounting surface for a subject, and The present invention relates to a body position recording device that includes a recording section that records displacement information of a subject and also records biological information.

[Prior Art] Ischemic heart diseases such as angina pectoris and myocardial infarction are one of the three major causes of death in Japan.
Treatment is an important issue. In particular, angina pectoris is generally an attack of chest pain due to myocardial ischemia induced by physical exertion or mental excitement, and the duration of the attack is approximately 10 minutes. Therefore, there is very little chance of grasping the situation during a seizure.

In order to make a more accurate diagnosis, exercise stress tests such as the master two-step test and treadmill stress test are currently being performed. These methods involve inducing angina by subjecting a patient suspected of having angina to physical exertion, and making judgments based on changes that appear in an electrocardiogram.

However, with the progress of research in recent years, angina pectoris induced by such exertion, which is different from so-called exertional angina, has become a problem. These are called resting angina or atypical angina, and symptoms are not induced by exercise stress. Therefore,
Since it is not possible to perform an exercise stress test, we currently have no choice but to make a presumptive diagnosis based on the patient's statement.
On the other hand, there are cases in which electrocardiograms show abnormalities that appear to be ischemic changes without any awareness of chest pain attacks, and their interpretation is by no means easy. An oversight (false negative) in the diagnosis of angina can have fatal consequences for the patient. On the other hand, overdiagnosis (false positives) causes iatrogenic cardiac neuropathy, which greatly impedes the patient's daily life over a long period of time. Therefore, it is necessary to minimize oversight and over-diagnosis and to make an accurate diagnosis.

Diagnosis of resting angina pectoris, atypical angina pectoris, etc. can be made more objectively by using devices that can continuously monitor or record electrocardiograms for long periods of time, such as tape electrocardiographs or bedside monitors. Although it is possible, a method for diagnosing angina pectoris using these devices has not yet been established. The reason for this is a waveform change on the electrocardiogram that can be diagnosed as angina pectoris.
The point is that ST-T changes can also be caused by other factors than angina pectoris. That is, since ST-T changes are not specific only to angina pectoris, even if ST-T changes are observed, angina cannot be easily diagnosed. Electrocardiograms are normally measured while the patient is lying supine at rest, but when recording electrocardiograms continuously over a long period of time, the patient is able to carry out daily activities with little difficulty. is constantly changing its body position and repeating various movements. By investigating the effects of such changes in body position on the electrocardiogram waveform,
It is desirable to use this data as basic data for future long-term continuous electrocardiogram diagnosis.

[Problems to be Solved by the Invention] However, there is no body position recording device that can be used for long-term continuous electrocardiogram diagnosis as shown in the conventional example, and if it is a large device that simply detects the tilt angle, for example, Published in Utility Model Publication No. 50-110258 and Utility Model Publication No. 55-14008. but,
Both of these devices measure the inclination angle using weights that move according to the inclination, and are not intended to be worn on a subject or the like. Moreover,
In order for the detection means to detect the position of the moving weight to operate reliably, the detection means must be large, and the device itself is large. This cannot be used for devices that are required to be small and lightweight to the extent that the test subject does not feel discomfort when wearing the device.
Another disadvantage is that the moving weight makes noise that is unpleasant.

Next, devices using mercury instead of the above-mentioned moving weight are disclosed in, for example, Japanese Utility Model Publication No. 46-31442 and Japanese Utility Model Publication No. 55-40386. but,
The former method only detects the tilt angle in one direction, and cannot be used as a device that is attached to a subject or the like to detect the angular direction in which the tilt angle changes. On the other hand, the latter is a large device that detects the posture of the device (ring) by moving mercury inside the ring, and is not intended to be worn on a subject or the like.
Further, a proximity switch is used as the detection means, and requires a certain size to operate reliably.

Therefore, it cannot be used as a small device that is attached to a subject and outputs change information of that subject.

The present invention was developed in view of the above-mentioned situation, and is small and lightweight, and can be attached to a subject and output change information, and can also correspond to biological information and change information. An object of the present invention is to provide a body position recording device that can record body position.

[Means and effects for solving the problem] In order to achieve the above object, the body position recording device of the present invention has the following configuration. That is, a body position detecting section having at least a part of a substantially flat surface that can be used as a mounting surface for the subject, and recording the displacement information of the subject output from the body position detecting section and recording the measured biological information. The body position detecting unit is configured as a three-dimensional object having a space inside, and has a pair of contact points on inner wall surfaces in at least five directions perpendicular to each other from the center of the space. is provided, and operates to output displacement information of the subject by housing a conductive fluid that turns on and off the contacts according to displacement of the three-dimensional object.

[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an example of a body position detecting section in a body position recording apparatus in this embodiment.

As shown in the figure, the external shape of the body position detection section 1 is, for example, a cube, so that it can be easily attached to the body. Moreover, a spherical space 2 is provided inside, and an inert gas and mercury 15 are sealed in this space 2. Furthermore, pairs of electrical contacts 3, 3 to 8, 8 are provided in the spherical space 2, respectively. These electrical contacts 3 , 3 - 8 , 8 are evenly attached toward each of the six outer surfaces 16 - 21 of the body position detection section 1 . Further, lead wires 9, 9-14, 14 led out from the electrical contacts 3, 3-8, 8 are connected to respective terminals 22-28 of the resistance circuit shown in FIG. 2, respectively. More specifically, for example, lead wires 9, 9 are connected to terminals 22, 23, and lead wires 10, 1
resistor such that 0 is connected to terminals 22, 24.
Each electrical contact 3, 3 to 8, in which R ₁ to R ₆ are paired, respectively.
8, they are connected in a short-circuitable manner. In addition, in FIG. 2, 32 is a plug switch, which is automatically closed when inserted into the jack of the electrocardiograph. As a result, the voltage E of the battery 31 is applied across the resistors R ₁ to R ₆ connected in series.

Next, the body position detection and recording operations of the body position recording apparatus in this embodiment will be described below.

When the body position detection unit 1 is attached to a patient, one of the contacts 3, 3 to 8, and 8 is short-circuited with mercury 15 depending on the patient's body position. Accordingly, the voltage selected by the lead wires 9, 9 to 14, 14 is supplied to the output terminal 29. By recording and observing this output voltage together with an electrocardiogram, more accurate diagnosis of heart disease can be made. Although FIG. 2 shows a circuit network in which resistors are connected in series to obtain different voltages depending on the body position, this circuit network is merely an example.
The circuit network that outputs the body position information from the body position detection unit 1 is as follows:
Any type of device may be used as long as different voltages can be obtained by closing a plurality of different pairs of contacts.

Next, a method for recording body position information output from the body position detection section will be described. FIG. 3 is an example of a circuit for converting a change in voltage output into a change in oscillation frequency using a unijunction transistor UJT. In the figure, when the output voltage of the body position detection section is supplied to the terminal 33, the unijunction transistor UJT oscillates and generates a pulse output at the output terminal 34 with a pulse width according to the time constant determined by CR. This output is supplied to the tape recorder 35 together with the output of the electrocardiograph ECG and recorded on separate tracks. That is, a change in the voltage output from the body position detection section is recorded on the tape recorder 35 as a change in the pulse repetition period.

In this embodiment, the voltage was converted into a signal with a corresponding pulse width, but it is also possible to perform frequency conversion or the like using a known voltage/frequency conversion circuit and record changes in the output voltage as changes in frequency.

As described above, according to this embodiment, a plurality of pairs of contacts are provided in the spaces provided in the insulating housing,
The contacts are short-circuited by the mercury that moves as the body changes,
Since the voltage indicating the body position is extracted and recorded and displayed together with the electrocardiogram waveform, diagnosis of resting angina pectoris and advice to the patient can be made appropriately. Additionally, this device is effective as a tool for more clearly analyzing the relationship between body position and electrocardiogram changes.

In addition, it will be possible to provide the same functionality as ITV. For example, in a ward for patients with consciousness disorders, psychiatric patients, infant patients, etc. who have difficulty communicating their will, staff may be required to take care of patients outside of regular rounds.
Central monitoring will be done using ITV.
In that case, although the body position detection device according to the present invention is not directly visible, it can also be used as a device for centrally monitoring the patient's condition, similar to the ITV. It is particularly effective for patients who require electrocardiogram monitoring, and the introduction of such a monitoring system will strengthen patient monitoring outside of regular rounds, contributing to better medical care.

[Effects of the Invention] As explained above, according to the present invention, it is possible to output change information of a subject with a small and lightweight device, and to record biological information and change information in correspondence. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a body position detection unit in an embodiment of the body position recording device according to the present invention, and FIG. 2 is a circuit diagram showing an example of a resistor circuit that outputs body position information from the body position detection unit in this embodiment. FIG. 3 is a partial block diagram showing the configuration of the body position recording apparatus in this embodiment. In the figure, 1... body position detection section, 3, 3 to 8, 8...
Electrical contact, 9, 9 to 14, 14...Lead wire, 1
5...It's mercury.

Claims (1)

[Scope of Claims] 1. A body position detecting section having at least a portion of a substantially flat surface that can be used as a mounting surface for the subject; and a body position detecting section for recording and measuring displacement information of the subject outputted from the body position detecting section. A body position recording device comprising a recording section for recording biometric information, wherein the body position detecting section is configured as a three-dimensional object having a space inside, and inner wall surfaces in at least five directions orthogonal to each other from the center of the space. A body position recording device, characterized in that a pair of contacts are provided in each of the three-dimensional objects, and a conductive fluid is contained in the contacts to turn on and off the contacts according to the displacement of the three-dimensional object, thereby outputting displacement information of the subject.