FR2594677A1 - Ophthalmorrheagraphic probe - Google Patents
Ophthalmorrheagraphic probe Download PDFInfo
- Publication number
- FR2594677A1 FR2594677A1 FR8702403A FR8702403A FR2594677A1 FR 2594677 A1 FR2594677 A1 FR 2594677A1 FR 8702403 A FR8702403 A FR 8702403A FR 8702403 A FR8702403 A FR 8702403A FR 2594677 A1 FR2594677 A1 FR 2594677A1
- Authority
- FR
- France
- Prior art keywords
- eyeball
- layers
- eye
- sensor
- vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000523 sample Substances 0.000 title abstract 2
- 210000005252 bulbus oculi Anatomy 0.000 claims abstract description 13
- 239000012777 electrically insulating material Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 210000001508 eye Anatomy 0.000 description 15
- 230000000004 hemodynamic effect Effects 0.000 description 5
- 230000004410 intraocular pressure Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 206010020565 Hyperaemia Diseases 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 210000004087 cornea Anatomy 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/251—Means for maintaining electrode contact with the body
- A61B5/252—Means for maintaining electrode contact with the body by suction
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/297—Bioelectric electrodes therefor specially adapted for particular uses for electrooculography [EOG]: for electroretinography [ERG]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/398—Electrooculography [EOG], e.g. detecting nystagmus; Electroretinography [ERG]
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Ophthalmology & Optometry (AREA)
- Eye Examination Apparatus (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
Description
L'invention concerne les instruments médicaux utilisés dans l'ophtalmologie, et plus particulièrement un capteur ophtalmorhéographique destiné à l'examen de l'hémodynamique de l'oeil. The invention relates to medical instruments used in ophthalmology, and more particularly to an ophthalmorheographic sensor intended for examining the hemodynamics of the eye.
L'enregistrement des fluctuations de l'impédance des tissus de l'oeil est une méthode importante dans l'étude de la circulation sanguine de l'oeil. La construction du capteur ophtalmorhéographique joue alors un rôle important. Recording fluctuations in the impedance of the tissues of the eye is an important method in studying the blood circulation of the eye. The construction of the ophthalmorheographic sensor then plays an important role.
Il existe le capteur ophtalmorhéographique de
Batterheim qui comporte un corps en un matériau isolant ayant une surface intérieure sphérique adaptée à une interaction avec la surface du globe oculaire, des électrodes sur la surface intérieure du corps et une tubulure pour la communication du corps avec une source de vide (voir, A.P. Nesterov et autres,"Pression intraoculaire" (physiologie et pathologie), en russe, Moscou, "Naouka", 1974, pages 194 à 207). En cas d'utilisation de ce capteur, le contact de la surface du globe oculaire avec les électrodes et le maintien du corps du capteur sur l'oeil sont obtenus grâce à la création de vide entre la surface intérieure du corps et la surface du globe oculaire.Pourtant, à cause de la compression de l'oeil due au vide, l'hémodynamique de l'oeil se voit perturbée et l'enregistrement obtenu du rhéogramme ne peut être objectif. Outre cela,il est difficile d'assurer un serrage uniforme des électrodes. Les recherches démontrent que seule la partie centrale du corps du capteur est bien fixée, alors qu'aux bords, le contact n'est pas bien intime et il en résulte que l'impédance est essentiellement fonction de la surface de contact et non de la fluctuation de l'hypérémie.There is the ophthalmorheographic sensor of
Batterheim which comprises a body of insulating material having a spherical inner surface suitable for interaction with the surface of the eyeball, electrodes on the inner surface of the body and tubing for the communication of the body with a source of vacuum (see, AP Nesterov and others, "Intraocular pressure" (physiology and pathology), in Russian, Moscow, "Naouka", 1974, pages 194 to 207). When using this sensor, the contact of the surface of the eyeball with the electrodes and the retention of the sensor body on the eye are obtained by creating a vacuum between the inner surface of the body and the surface of the globe. However, due to the compression of the eye due to the vacuum, the hemodynamics of the eye is disturbed and the recording obtained from the rheogram cannot be objective. Besides this, it is difficult to ensure uniform clamping of the electrodes. Research shows that only the central part of the sensor body is well fixed, while at the edges, the contact is not very intimate and it follows that the impedance is essentially a function of the contact surface and not of the fluctuation in hyperemia.
On s'est proposé de perfectionner la construction de ce capteur ophtalmorhéographique afin d'assurer, lors de la mesure, un contact intime uniforme des électrodes avec la surface du globe oculaire et d'exclure l'influence du degré du vide sur la valeur de la pression intraoculaire et l'hémodynamique de l'oeil. It has been proposed to perfect the construction of this ophthalmorheographic sensor in order to ensure, during the measurement, a uniform intimate contact of the electrodes with the surface of the eyeball and to exclude the influence of the degree of vacuum on the value of intraocular pressure and hemodynamics of the eye.
La solution consiste en ce que, dans le capteur ophtalmorhéographique qui comporte un corps en un matériau électro-isolant ayant une surface intérieure sphérique adaptée à un contact avec la surface du globe oculaire, des électrodes sur la surface intérieure du corps et une tubulure pour relier le corps à une source de vide, conformément à l'invention, le corps est réalisé en deux couches avec raccordement étanche des couches suivant la périphérie du corps et formation d'une cavité entre les couches communiquant avec la tubulure, la couche intérieure étant alors réalisée selon la forme du globe oculaire et ayant plusieurs orifices de part en part. The solution consists in that, in the ophthalmorheographic sensor which comprises a body made of an electrically insulating material having a spherical interior surface adapted to contact with the surface of the eyeball, electrodes on the interior surface of the body and a tubing for connecting the body to a source of vacuum, in accordance with the invention, the body is produced in two layers with tight connection of the layers along the periphery of the body and formation of a cavity between the layers communicating with the tubing, the inner layer then being made according to the shape of the eyeball and having several orifices right through.
Le capteur ophtalmorhéographique réalisé conformément à l'invention assure, lors des mesures, un contact intime uniforme des électrodes avec la surface du globe oculaire, exclut l'influence du degré de vide sur la valeur de la pression intra-oculaire, ce qui permet de réaliser une étude objective de l'hémodynamique de l'oeil et aide à établir un diagnostic précis. Le capteur est facile à fabriquer et il est fiable à l'utilisation. The ophthalmorheographic sensor produced in accordance with the invention ensures, during the measurements, a uniform intimate contact of the electrodes with the surface of the eyeball, excludes the influence of the degree of vacuum on the value of the intraocular pressure, which makes it possible to conduct an objective study of the hemodynamics of the eye and help establish an accurate diagnosis. The sensor is easy to manufacture and reliable in use.
L'invention sera pieux comprise, et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement au cours de la description explicative qui va suivre faite en référence au dessin schématique annexé donné uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lequel
- la figure unique représente un capteur ophtalmorhéographique selon l'invention, en vue d'ensemble, en coupe transversale.The invention will be understood as pious, and other objects, characteristics, details and advantages thereof will appear more clearly during the explanatory description which follows, made with reference to the appended schematic drawing given solely by way of example illustrating a embodiment of the invention and in which
- The single figure shows an ophthalmorheographic sensor according to the invention, in overview, in cross section.
Le capteur ophtalmorhéographique selon l'invention est formé d'un corps sphérique 1 en deux couches en un matériau électro-isolant, muni d'une tubulure 2 pour communiquer avec une source de vide (qui n'est pas montrée sur le dessin) et des électrodes 3 disposées sur sa surface intérieure. La couche intérieure 4 et la couche extérieure 5 du corps 1 sont raccordées d'une façon étanche et suivant le périmètre du corps 1, à un endroit 6, et, de ce fait, entre les couches 4 et 5, il existe une cavité 7 communiquant avec la tubulure 2. La couche intérieure 4 est réalisée suivant la forme du globe oculaire et a plusieurs orifices de part en part 8. The ophthalmorheographic sensor according to the invention is formed of a spherical body 1 in two layers of an electrically insulating material, provided with a tube 2 for communicating with a vacuum source (which is not shown in the drawing) and electrodes 3 arranged on its interior surface. The inner layer 4 and the outer layer 5 of the body 1 are connected in a leaktight manner and along the perimeter of the body 1, at a location 6, and, therefore, between the layers 4 and 5, there is a cavity 7 communicating with the tubing 2. The inner layer 4 is produced according to the shape of the eyeball and has several openings right through 8.
Les prises étanchéifiées des électrodes 3 ressortent du corps 1 et sont reliées à des conducteurs extérieurs 9 pouvant etre branchés sur un rhéographe (qui n'est pas montré sur le dessin).The sealed sockets of the electrodes 3 protrude from the body 1 and are connected to external conductors 9 which can be connected to a rheograph (which is not shown in the drawing).
Le capteur ophtalmorhéographique fonctionne de la façon suivante. The ophthalmorheographic sensor operates as follows.
Le corps 1 est appliqué sur l'oeil de façon que la cornée de l'oeil se trouve au centre du corps 1. A l'aide d'une source de vide, par la tubulure 2 et les orifices 8, un vide est créé dans la cavité 7 et entre la couche 4 et la surface du globe oculaire. La surface intérieure de la couche 4 épouse alors intimement la surface de l'oeil en assurant un contact intime et uniforme de ses tissus avec toute la surface des électrodes 3. La rigidité de la couche intérieure 4 est choisie telle qu'elle ne se déforme pas sous l'action du vide et exclut la déformation de la partie avant de l'oeil, ce qui est important pour des examens hémodynamiques. The body 1 is applied to the eye so that the cornea of the eye is in the center of the body 1. With the help of a vacuum source, through the tube 2 and the orifices 8, a vacuum is created in cavity 7 and between layer 4 and the surface of the eyeball. The inner surface of the layer 4 then intimately follows the surface of the eye, ensuring intimate and uniform contact of its tissues with the entire surface of the electrodes 3. The rigidity of the inner layer 4 is chosen such that it does not deform not under the action of vacuum and excludes deformation of the front part of the eye, which is important for hemodynamic examinations.
La couche 4 est réalisée, par exemple, en polyméthylméthacrylate. La réalisation de la couche intérieure 4 sous la forme du globe oculaire et avec les orifices 8 exclut la possibilité d'une position incorrecte du corps 1 sur l'oeil, sinon une partie des orifices 8 n'entrera pas en contact avec la surface du globe oculaire, ce qui provoquera la rupture du vide dans la cavité 7 et le corps 1 ne se fixera pas sur l'oeil. Les conducteurs extérieurs 9 sont branchés sur le rhéographe et on enregistre les rhéogrammes. Après l'examen, le vide est rompu et le capteur est enlevé de l'oeil. Layer 4 is made, for example, of polymethylmethacrylate. The production of the inner layer 4 in the form of the eyeball and with the orifices 8 excludes the possibility of an incorrect position of the body 1 on the eye, otherwise part of the orifices 8 will not come into contact with the surface of the eyeball, which will cause the rupture of the vacuum in the cavity 7 and the body 1 will not attach to the eye. The external conductors 9 are connected to the rheograph and the rheograms are recorded. After the examination, the vacuum is broken and the sensor is removed from the eye.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU864023143A SU1428344A1 (en) | 1986-02-25 | 1986-02-25 | Ophthalmorheographic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2594677A1 true FR2594677A1 (en) | 1987-08-28 |
Family
ID=21221933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8702403A Withdrawn FR2594677A1 (en) | 1986-02-25 | 1987-02-24 | Ophthalmorrheagraphic probe |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS62236533A (en) |
| BG (1) | BG49738A1 (en) |
| CS (1) | CS91387A1 (en) |
| DD (1) | DD281496A7 (en) |
| DE (1) | DE3705375A1 (en) |
| FR (1) | FR2594677A1 (en) |
| HU (1) | HU194726B (en) |
| IT (1) | IT1218563B (en) |
| SU (1) | SU1428344A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2713913A1 (en) * | 1993-12-21 | 1995-06-23 | Dencott Lab Sa | Electroretinography shell and its prodn. |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1224847B (en) * | 1958-12-22 | 1966-09-15 | Dr Med Walter Laabs | Device for suction mass and simultaneous electrification |
| US3505993A (en) * | 1964-12-23 | 1970-04-14 | Nat Res Dev | Electrocardiograph electrodes with surface convexities |
| US4109648A (en) * | 1975-12-18 | 1978-08-29 | National Research Development Corporation | Electrode assemblies |
-
1986
- 1986-02-25 SU SU864023143A patent/SU1428344A1/en active
-
1987
- 1987-02-10 BG BG78414A patent/BG49738A1/en unknown
- 1987-02-11 DD DD87299850A patent/DD281496A7/en not_active IP Right Cessation
- 1987-02-12 CS CS87913A patent/CS91387A1/en unknown
- 1987-02-19 HU HU87648A patent/HU194726B/en not_active IP Right Cessation
- 1987-02-20 DE DE19873705375 patent/DE3705375A1/en not_active Withdrawn
- 1987-02-24 FR FR8702403A patent/FR2594677A1/en not_active Withdrawn
- 1987-02-24 IT IT41532/87A patent/IT1218563B/en active
- 1987-02-24 JP JP62039334A patent/JPS62236533A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1224847B (en) * | 1958-12-22 | 1966-09-15 | Dr Med Walter Laabs | Device for suction mass and simultaneous electrification |
| US3505993A (en) * | 1964-12-23 | 1970-04-14 | Nat Res Dev | Electrocardiograph electrodes with surface convexities |
| US4109648A (en) * | 1975-12-18 | 1978-08-29 | National Research Development Corporation | Electrode assemblies |
Non-Patent Citations (1)
| Title |
|---|
| NURSING MIRROR, 31 janvier 1980, pages 24-27, GB; G. TH. PAVLIDIS: "How to catch his eye" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2713913A1 (en) * | 1993-12-21 | 1995-06-23 | Dencott Lab Sa | Electroretinography shell and its prodn. |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1218563B (en) | 1990-04-19 |
| DE3705375A1 (en) | 1987-11-05 |
| HUT43253A (en) | 1987-10-28 |
| JPH0328930B2 (en) | 1991-04-22 |
| SU1428344A1 (en) | 1988-10-07 |
| IT8741532A0 (en) | 1987-02-24 |
| DD281496A7 (en) | 1990-08-15 |
| JPS62236533A (en) | 1987-10-16 |
| BG49738A1 (en) | 1992-02-14 |
| CS91387A1 (en) | 1990-06-13 |
| HU194726B (en) | 1988-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |