JPH05508562A - Eye movement observation and/or recording device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Eye Movement Observation and/or Recording Device The present invention uses a small number of (both two sensors) record the output signal of a lead-out electrode that can be contacted with the patient's skin, especially around the eyes. Memory device for! The present invention relates to a device for testing eye movements of a patient, having the following features.

Examination of eye movements is useful for patients suffering from weight and balance problems. this These failures occur randomly and for a short time in the seconds range, and also occur over a relatively short period of time, e.g. Can disappear again after 0 seconds (so-called postural weight with or without postural nystagmus) .

This means that patients who should be tested are repeatedly tested because the condition that should be tested does not occur. It means having to visit a doctor for no benefit. In this situation, the patient Having to wait continuously for many days, and even drinking regularly This means that he will have to stay in the hospital for a while. Therefore, how can patients Research has already been conducted on whether people can record their weight status at home.

For example, Watanabe and Ikeda co-authored ``Pocket-sized electrocardiograph'' Electronic stagmography used outside the hospital J Acta Otolar yng　5uppl.

From 393.49 to 57/19B3, as a device of the type mentioned at the beginning, or a cell that the patient must attach to a predetermined location at the orbital rim. Devices are known in which the sensor is constructed as an adhesive bridge. These positions are For example, Hyde, Vestibular Testing and Vestibular Disease, Springer Publishing, 1990, Vol. As is known from the third member onwards, from the left eye to the left and from the right eye to the right, also preferably are additionally superior and inferior from one eye. The movement of m is in that case the orbital rim It is measured by the fluctuation of the voltage extracted at However, this measure did not allow samurai to do anything outside the hospital. It has various drawbacks that may limit its wide practical use.

It takes about 5 minutes to prepare (removal of contact/adhesive gel coating foil, electrode individual attachment), during which the nystagmus episode may have already subsided again.

Once applied to the patient, the electrodes are placed in the desired position, especially based on their nystagmus condition. It is uncertain whether it is installed correctly. Furthermore, nystagmus is common and very It has been linked to sweating, which easily causes electrodes to fall off. patient is excited Also, if you replace the electrode while the vibration-limiting condition is occurring, there is a risk of erroneous measurements. This may not be immediately recognizable later during the evaluation, and may lead to incorrect inferences on the part of the diagnosing physician. This can lead to

The tin of the invention therefore provides a medically trained person with a device of the type mentioned at the outset. Configure the sensor so that it can be attached reliably and quickly even when handled by someone who is not present. There is a particular thing.

According to the present invention, this problem can be solved by the fact that it can be worn on the patient's head and also has a The sensor is integrally installed at a predetermined position so that the sensor is formed after installation. This problem is solved by providing a holding device that includes Such measures will ensure that the sensor It has the advantage that it does not need to be individually mounted on the head. All of them are predetermined. Attach the holding frame to the predetermined location and position it at each predetermined location. This eliminates the complicated handling of individual sensors. Attachment using the holding frame Prevents the sensor from slipping or falling off when sweating. When performing comparative tests on patients, The output electrodes are located in the same or at least similar positions each time and therefore the outputs to be compared The curve profile of the signal exhibits only slight deviations due to positioning errors or the mutual spacing of the electrodes. There is an advantage of not having one.

A particularly advantageous embodiment of the invention provides that the retaining device is preferably attached to the patient by means of an elastic band. They are characterized by being glasses that are worn around the head. The majority of patients already wear glasses. For example, when using ski glasses, it serves as a holding frame. this This makes it possible to position the lead-out electrode particularly quickly and reliably.

In another implementation, the retainer was attached to the skin at least within the eye area. It has a raised terminal edge of resilient material in which the sensor is embedded.

In this case, the sensor is preferably approximately flat in order to reduce the risk of it being torn off. , i.e., it is built so that it has only a slight protrusion with respect to the surface of the terminal edge. There is. The terminal edges may be made of a soft material, for example, to allow easy cleaning or disinfection. Preferably by foam plastic covered with smooth synthetic resin foil. It is formed.

Additionally, the sensor allows uniform adaptation of its entire detector surface to the skin surface. Therefore, it is advantageous if it is movably attached to the holding device. Mobility is, for example, through the arrangement of a number of springs supported by a holding device and mounted on the back of the sensor. can be obtained. Block of elastic foam plastic harder than green raised material 6 Importantly, as much as possible the entire detector surface of the sensor should be skin contact.

Other advantages and embodiments of the invention will become apparent from the description of the exemplary embodiments shown in the drawings.

Fig. 1 is a front view of a holding device in the form of glasses, and Fig. 2 is an internal view of the glasses with a sensor. , Fig. 3 shows an exchangeable frame for accommodating an inspection aid, and Fig. 4 shows a memory device. FIG. 2 is a principle circuit diagram of a control device having the following.

1st V! i and the reference numeral 1 in FIG. spectacles that are placed on the patient's neck and then placed on the patient's head under sustained pressure Frames or glasses. The bands 3 each have an attachment, a hook or a clasp at each end. From two parts 3a, 3b with chuck parts 4a, 4b in the form of gold chucks It has become. The ocular ml has rocking and and/or a shifting mechanism (not shown). For example, this mechanism is symmetrical for glasses L. It may be provided in a central bridge part which is arranged within the axis.

In place of [#I as a retaining device, ensuring a secure and non-slip attachment to the head A light helmet, textile cap, wire frame or other retention device may also be used. Ru. For example, when a weight is generated, it is simply swung and pressed in front of the eye area. It is a good idea to use a light helmet that is equipped with a good kind of visor. Ru.

The inner rim 5 of the glasses 1 facing towards the eyes is covered with a bullet, e.g. of foam plastic. A ridge 7 made of soft material is attached. Foam plastic is easy to clean. To enable cleaning, it is surrounded by a synthetic resin foil, for example synthetic leather. bump completely covers green 5 of glasses 1, or if glasses 1 are desired to be worn on the patient's face. Derivation for measuring the electrical potential at the skin within the bulge 7, which partially surrounds the area An electrode 9 is fitted as a sensor. Detects movement of the eye or the skin surrounding the eye. The use of other sensors, such as pressure sensors or strain gauges, to It can be considered the same. In total, five electrodes 9 are provided, and among them, 9a and 9b are placed on the left and right sides of the eyeglass rim at the height of band 4, respectively. 9c and 9d are placed above and below within the eye range! has been done. The fifth electrode 9e is Connected to ground. The lead wires 11 to the electrodes 9 are led together to the eyeglass frame. and is also connected to the control device (Fig. 4) via a common plug connection 13. There is.

The electrode 9 is movable to allow even adaptation of its entire detector surface to the skin surface. It is attached to the eyeglass rim 5.

Preferably, in combination with the above-mentioned lead-out electrode 9 or separately, illumination means, e.g. The combination of the lamp 12 and the replaceable frame 15 shown separately in FIG. It is applicable. The lamp 12 provides good illumination of the interior space and provides good illumination to outside observers. It is attached to the eyeglass frame to allow observation of the eye. As a lighting method, along Green 5 It extends for a long time and has an aperture through which light can come out, thereby ensuring uniform illumination of the interior space. Light guides which allow light to shine have proven to be particularly advantageous. As a result, the cornea The constancy of the membrane potential is increased.

The frame 15 is detachably connected to the spectacle frame 1. The connection is between the magnet 1 in the eyeglass frame 1 7 and a corresponding counterelement 19 in the frame 15. adhesive strip, / Use other means of attachment, such as a chuck, push button or hinge connection. You might also say that.

A number of mountable frames 15 are provided, each containing an inspection aid.

They are available in lens foils, prism foils, lenses of various refractive strengths, with markings and This may be plain colored or transparent glass or foil. markings are engraved , a form of scale mounted or painted with printed or removed foil It's good to have it available.

A spectacle frame 1 with an integrated internal illumination for illuminating the eyeball to be observed includes: Various frames 15 can be mounted. Frames with lens foil (Fresnel foil) are not publicly available. It has a clearly larger viewing field compared to the known Frenzel glasses, and Magnified imaging for better observation at a lighter weight than regular glass lenses enable.

In conjunction with the incorporation of 1 electric rod 9, electric Ili [I! FuriLD! With this embodiment of the mirror, Eye movements can be tracked by the observer, and electronic stagmography can be recorded at the same time. It becomes possible to do so. Colored or Other frames with completely black glass can also be placed.

The holding device is adapted to accept a video head for optically recording eye movements. It is advantageous if configured. For example, the video head is an eyeball that changes when the eye moves. A light reflection device, which may consist of a charging device (camera lens) for recording the light reflection of radiation is also generated in the infrared range by illumination of the eye, e.g. by incident light. . Also, consider using a sensor, such as a CCD sensor, to directly image eye movements. available.

FIG. 4 shows a principle circuit diagram for illustrating the control process and signal processing.

The electrode 9 is connected to a signal processing and control device 20 via a lead wire 11 and a connecting connector 13. It is connected to the. The device 20 is small and easy to handle as a pocket book for man. The portable design makes it easier for patients to carry around.

The measurement signal picked up from the electrode is guided to a filter and preamplifier stage 22. and then converted into a digital signal. In ROM24, for example, the prefix Work programs for automatic amplifier configuration, readiness analysis, data and time recording, etc. The program is stored and the CPU 26 controls the progress. digitized The measured values are written into RAM28. read them again at any time be able to. In the signal processing and control device 20, the memory device y1 (RAM) is a holding device. automatically after installation, e.g. by measuring the impedance of the electrodes. enable. If the doctor wants to perform the test by artificially inducing a feeling of weight, the manual Input by the government is also important.

The signal processing and control device 20 further monitors correct skin contact of the sensor or electrode 9. It also includes a monitoring circuit that interrupts the recording of the measurement signal in the event of an erroneous contact.

The supervisory circuit is an optical or acoustic device that indicates if a faulty operating condition exists. Preferably connected to an indicating device.

The amplification factor of the preamplifier stage 22 for the sensor signal can be set manually or automatically depending on the setting factor. is set through impedance measurements of skin resistance.

Memory device 2 can be measured through a processing station run and directly through a connector connection, or is connected indirectly by means of data transmission, for example via a telephone or wireless device. An online connection (not shown) is provided. The measurement signal is thus directly inspected. In the case shown, the signal processing and control device 20 directly , connected to an evaluation device 30 into which various evaluation programs 32 can be selectively loaded. ing. The evaluation device 30 is connected to a printer 34 for the purpose of documentation. ing. Reading of measurement signals from RAM 28 and other memory means, e.g. After transmitting the measurement signal to the floppy disk 36, the device is immediately used for the next inspection. can be used.

Figure 4 abstract International trial scale cow 111-^--”’ PCT/EP 91100944 International Search Report

Claims (15)

[Claims] 1. Signals from at least two sensors, especially around the eyes, that can be in contact with the patient's skin the patient's eye movements, with a memory device for recording the output signals of the derived electrodes; A device for testing that can be attached to the patient's head and that does not come into contact with the patient's skin. The sensor is integrally mounted in a predetermined position to be formed later. An eye movement testing device characterized by being provided with a holding device. 2. Spectacles in which the retaining device is fitted around the patient's head, preferably by means of an elastic band The device according to claim 1, characterized in that: 3. The band may have, for example, an attachment, a hook or a clasp chuck at each end. Claim 2, characterized in that it consists of two parts having a chuck part. The device described. 4. The retention device is made of an elastic material facing towards the skin at least within the eye area. The sensor is characterized in that it has a raised end edge, and a sensor is embedded therein. Device according to one of claims 1 to 3. 5. Because the sensor allows an even adaptation of its entire detector surface to the skin surface, Claims 1 to 4, characterized in that the device is movably attached to the holding device. Apparatus according to one. 6. The retaining device has a rocking and/or The device according to one of claims 1 to 3, characterized in that it has a shifting mechanism. Place. 7. It is characterized by being equipped with a lighting device to better observe eye movements. 7. A device according to one of claims 1 to 6. 8. The lead wires to the sensor are routed together in a holding device and are connected to a common plug. Claims 1 to 3 are characterized in that the memory device is connected to the memory device via the memory connection. 7. The device according to claim 7. 9. The memory device automatically adjusts the impedance of the sensor, e.g. after inserting the holding device. 9. The method according to claim 1, characterized in that the injection is performed by measuring the Device. 10. A memory device monitors the sensor for correct skin contact and also detects incorrect contact. includes a monitoring circuit for interrupting the recording of the measurement signal. 10. The device according to one of 1 to 9. 11. A monitoring circuit provides an optical or 11. Device according to claim 10, characterized in that it is connected to an acoustic indicating device. 12. It includes a control device with a preamplifier stage for the sensor signal and its increase The width factor is set by a setting element or automatically via impedance measurement of skin resistance. 12. Device according to one of claims 1 to 11, characterized in that: 13. An online connection device for connecting memory devices to telephone or wireless devices. 13. Device according to one of claims 1 to 12, characterized in that it comprises: 14. The holding device accommodates a video head for optically recording eye movements. The device according to one of claims 1 to 13, characterized in that the device is configured to Place. 15. Place each lens, lens foil or colored, black or clear glass on the side of the eye. Contains inspection aids such as laths, preferably with engraved markings. provided with a border frame that is configured to accept a variety of border frames. Claims 1 to 1 characterized in that a holding frame, in particular a pair of glasses, is provided. 3. The patient's eye movement testing device according to claim 3.