WO2013058671A1 - Device for measuring intraocular pressure through the eyelid - Google Patents
Device for measuring intraocular pressure through the eyelid Download PDFInfo
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- WO2013058671A1 WO2013058671A1 PCT/RU2011/000810 RU2011000810W WO2013058671A1 WO 2013058671 A1 WO2013058671 A1 WO 2013058671A1 RU 2011000810 W RU2011000810 W RU 2011000810W WO 2013058671 A1 WO2013058671 A1 WO 2013058671A1
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- rod
- housing
- eyelid
- intraocular pressure
- measuring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/16—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring intraocular pressure, e.g. tonometers
Definitions
- the invention relates to medicine and can be used to measure intraocular, intracranial pressure, elasticity of tissues and organs, both external and internal, and to measure the viscosity (swelling) of tissues and organs of both humans and animals.
- RF ⁇ 2123798, ⁇ ⁇ 61 ⁇ 3/16, 1998) consisting of a housing with a support with two protrusions placed in it with the possibility of limited reciprocating movement, designed to create a constant predetermined load, an element of the eyeball deformation through the eyelid in the form of a freely falling rod , the holder of the deformation element in the initial upper position, the linear displacement transducer of the deformation element, made in the form of a generator associated with an electromagnetic coil.
- a device for measuring intraocular pressure through the eyelid according to paragraph 4 of the RF patent J "2335234, IPC ⁇ 3/16, 2008, containing a body, an eyeball deformation element in the form of a rod connected to the body by an elastic spring, an additional unit rod pressure and rod displacement sensor for measuring the frequency of free oscillations of the rod.
- Information about the value of intraocular pressure in the known device is obtained from the frequency of free oscillations of the stem, which is functionally related to intraocular pressure.
- the technical result to which the claimed invention is directed is to increase the accuracy of measuring intraocular pressure through the eyelid by creating a device that, during the measurement process, the static pressure of the rod on the eye is strictly normalized and guaranteed to be stable, while high rigidity of the rod and transverse directions relative to the geometric axis of the body, excluding touching the rod of the device body during oscillations of the doctor’s hand.
- the deformation element of the eyeball through the eyelid made in the form of a rod connected to the body using the first membrane spring, said rod is additionally connected to the body through the second membrane spring, while the housing is placed with the possibility of free movement in an external housing equipped with a position sensor of the housing relative to the external housing, and for measuring the frequency of free vibrations Located on the housing first rod is equipped with a permanent magnet that interacts with the electromagnetic coil.
- a device for measuring intraocular pressure through the eyelid contains a rod 1, which passes through the centers of two membrane (diaphragm) springs 2, and is rigidly connected with them.
- the springs 2 are rigidly connected with their edges to the housing 3.
- the housing 3 is coaxially placed inside the external housing 4 with the possibility of free movement along a common axis.
- a sensor 5 of the housing 3 is rigidly fixed to the outer casing 4.
- the node for measuring the frequency of free oscillations of the rod is made in the form of a permanent magnet 6 mounted on the rod 1, and electromagnetic coil 7 placed on the housing 3 in the area of action of the magnet 6.
- the process of measuring intraocular pressure using the inventive device is as follows.
- the device, held by the doctor’s hand by the outer casing 4 is installed by the rod 1 on the eyelid of the patient’s eye, after which the outer casing 4 moves in the direction of the eyelid until the casing 3 is displaced relative to the outer casing 4.
- the direction of displacement of the casing 3 relative to the outer casing 4 is shown by an arrow in FIG. .
- the indicated displacement is measured by the housing position sensor 5, while the total weight of the rod 1, the permanent magnet 6, the springs 2, the housing 3 and the electromagnetic coil 7 (no more than 20 grams) is statically pressed on the eye.
- the result of measuring the intraocular pressure does not depend on the initial static pressure and the probability of touching the body with the rod during oscillations of the arm ⁇ of the doctor is excluded.
- the applicant conducted tests of the proposed device showed a significant increase in the accuracy of measurement of intraocular pressure compared with the device adopted as the closest analogue.
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
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- Heart & Thoracic Surgery (AREA)
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Abstract
The invention relates to medicine. The technical result consists in increasing the accuracy of measuring intraocular pressure through the eyelid by creating a device in which the static pressure of a rod (1) on the eye is strictly standardized and guaranteed to be stable during the measuring process, wherein a high degree of rigidity in the movement of the rod (1) relative to the geometrical axis of a housing (3) is provided for structurally, thus preventing the rod (1) from touching the housing (3) of the device in the event of the doctor's hand shaking. The device for measuring intraocular pressure through the eyelid comprises the housing (3) and an element for deforming the eyeball through the eyelid, said element being in the form of a rod (1) which is connected to the housing (3) with the aid of a first diaphragm-type spring (2), the rod (1) is rigidly connected to the housing (3) by means of a second diaphragm-type spring (2), the housing (3) is arranged so as to be freely movable in an external housing (4), which is equipped with a sensor (5) of the position of the housing (3), a permanent magnet (6) is mounted on the rod (1), and an electromagnetic coil (7) interacting with said permanent magnet is arranged on the housing (3).
Description
УСТРОЙСТВО ИЗМЕРЕНИЯ ВНУТРИГЛАЗНОГО ДАВЛЕНИЯ INTERNAL EYE PRESSURE DEVICE
ЧЕРЕЗ ВЕКО VIA THE CENTURY
Область техники Technical field
Изобретение относится к медицине и может использоваться для измерения внутриглазного, внутричерепного давления, упругости тканей и органов как наружных, так и внутренних, измерения вязкости (отечности) тканей и органов как человека, так и животных. The invention relates to medicine and can be used to measure intraocular, intracranial pressure, elasticity of tissues and organs, both external and internal, and to measure the viscosity (swelling) of tissues and organs of both humans and animals.
Предшествующий уровень техники Известно устройство для измерения внутриглазного давления (патентBACKGROUND OF THE INVENTION A device for measuring intraocular pressure is known (patent
РФ Ш 2123798, МГЖ А61В 3/16, 1998г), состоящее из корпуса с размещенной в нем с возможностью ограниченного возвратно- поступательного перемещения опорой с двумя выступами, предназначенной для создания постоянной заданной нагрузки, элемента деформации глазного яблока через веко в виде свободно падающего штока, держателя элемента деформации в исходном верхнем положении, преобразователя линейного перемещения элемента деформации, выполненного в виде генератора, связанного с электромагнитной катушкой. RF Ш 2123798, МГЖ А61В 3/16, 1998), consisting of a housing with a support with two protrusions placed in it with the possibility of limited reciprocating movement, designed to create a constant predetermined load, an element of the eyeball deformation through the eyelid in the form of a freely falling rod , the holder of the deformation element in the initial upper position, the linear displacement transducer of the deformation element, made in the form of a generator associated with an electromagnetic coil.
На результаты измерения внутриглазного давления вышеприведенным устройством влияет перпендикулярность падения штока на веко и склеру глаза, перпендикулярность падения штока в самом устройстве, реакция мышц, удерживающих яблоко глаза, на удар, что понижает точность измерения особенно при высоком внутриглазном давлении.
В качестве ближайшего аналога заявляемого технического решения выбрано устройство измерения внутриглазного давления через веко по пункту 4 патента РФ J « 2335234, МПК А61В 3/16, 2008г, содержащее корпус, элемент деформации глазного яблока в виде штока, связанного с корпусом упругой пружиной, блок дополнительного давления штока и датчик перемещения штока для измерения частоты свободных колебаний штока. The results of measuring the intraocular pressure with the above device are affected by the perpendicularity of the fall of the rod on the eyelid and the sclera of the eye, the perpendicularity of the fall of the rod in the device itself, the reaction of the muscles holding the eye apple to shock, which reduces the measurement accuracy especially at high intraocular pressure. As the closest analogue of the claimed technical solution, a device for measuring intraocular pressure through the eyelid according to paragraph 4 of the RF patent J "2335234, IPC АВВ 3/16, 2008, containing a body, an eyeball deformation element in the form of a rod connected to the body by an elastic spring, an additional unit rod pressure and rod displacement sensor for measuring the frequency of free oscillations of the rod.
Информацию о величине внутриглазного давления в известном устройстве получают из частоты свободных колебаний штока, которая функционально связана с внутриглазным давлением. Information about the value of intraocular pressure in the known device is obtained from the frequency of free oscillations of the stem, which is functionally related to intraocular pressure.
Недостатки известного устройства заключаются в следующем. The disadvantages of the known device are as follows.
Крепление штока к корпусу с помощью двух стандартных пружин или одной пружины, работающей на изгиб, приводит к образованию системы шток-пружина, которая характеризуется невысокой угловой жесткостью и, как следствие, высокой угловой подвижностью штока в телесном угле с вершиной в точке соединения штока с пружиной и повышенной вероятностью касания штока и корпуса. Такие касания резко изменяют характер движения штока и являются причиной искажений результатов измерения. Кроме того, угловые перемещения штока изменяют исходную геометрию пружины и приводят к неконтролируемому перераспределению ее внутренних напряжений. Указанные факторы обуславливают изменение жесткости пружины, непосредственно определяющей частоту свободных колебаний штока, и приводят к снижению точности измерений внутриглазного давления. Fastening the rod to the body using two standard springs or one spring working on bending leads to the formation of a rod-spring system, which is characterized by low angular stiffness and, as a result, high angular mobility of the rod in solid angle with the apex at the point of connection of the rod with the spring and increased likelihood of touching the stem and body. Such touches dramatically change the nature of the movement of the rod and cause distortion of the measurement results. In addition, the angular displacement of the rod changes the initial geometry of the spring and lead to uncontrolled redistribution of its internal stresses. These factors cause a change in the stiffness of the spring, which directly determines the frequency of free oscillations of the stem, and lead to a decrease in the accuracy of measurements of intraocular pressure.
Еще одним фактором, снижающим точность измерений в известном устройстве, является то, что начальное статическое давление штока на глаз создается рукой врача и, как следствие, не нормируется и не контролируется. В результате измеренное внутриглазное давление может превысить реальное, что приводит к искажению результатов измерений.
Раскрытие изобретения Another factor that reduces the accuracy of measurements in the known device is that the initial static pressure of the rod on the eye is created by the hand of a doctor and, as a result, is not standardized and not controlled. As a result, the measured intraocular pressure may exceed the real one, which leads to a distortion of the measurement results. Disclosure of invention
Технический результат, на достижение которого направлено заявляемое изобретение, состоит в повышении точности измерения внутриглазного давления через веко за счет создания устройства, у которого в процессе измерения статическое давление штока на глаз строго нормировано и гарантированно стабильно, при этом конструктивно обеспечивается высокая жесткость перемещения штока в угловом и поперечном направлениях относительно геометрической оси корпуса, исключающая касания штоком корпуса устройства при колебаниях руки врача. The technical result to which the claimed invention is directed is to increase the accuracy of measuring intraocular pressure through the eyelid by creating a device that, during the measurement process, the static pressure of the rod on the eye is strictly normalized and guaranteed to be stable, while high rigidity of the rod and transverse directions relative to the geometric axis of the body, excluding touching the rod of the device body during oscillations of the doctor’s hand.
Технический результат достигается тем, что в устройстве для измерения внутриглазного давления через веко, содержащем корпус, элемент деформации глазного яблока через веко, выполненный в виде штока, связанного с корпусом с помощью первой мембранной пружины, упомянутый шток дополнительно связан с корпусом посредством второй мембранной пружины, при этом корпус размещен с возможностью свободного перемещения во внешнем корпусе, оснащенном датчиком положения корпуса относительно внешнего корпуса, а для измерения частоты свободных колебаний шток оборудован постоянным магнитом, взаимодействующим с электромагнитной катушкой, расположенной на корпусе. The technical result is achieved by the fact that in the device for measuring intraocular pressure through the eyelid containing the body, the deformation element of the eyeball through the eyelid, made in the form of a rod connected to the body using the first membrane spring, said rod is additionally connected to the body through the second membrane spring, while the housing is placed with the possibility of free movement in an external housing equipped with a position sensor of the housing relative to the external housing, and for measuring the frequency of free vibrations Located on the housing first rod is equipped with a permanent magnet that interacts with the electromagnetic coil.
Устройство измерения внутриглазного давления через веко (фиг.1) содержит шток 1, который проходит через центры двух мембранных (диафрагменных) пружин 2, и жестко связан с ними. Пружины 2 своими краями жестко связаны с корпусом 3. Корпус 3 соосно размещен внутри внешнего корпуса 4 с возможностью свободного перемещения вдоль общей оси. На внешнем корпусе 4 жестко закреплен датчик 5 положения корпуса 3. Узел измерения частоты свободных колебаний штока выполнен в виде постоянного магнита 6, установленного на штоке 1 , и
электромагнитной катушки 7, размещенной на корпусе 3 в зоне действия магнита 6. A device for measuring intraocular pressure through the eyelid (figure 1) contains a rod 1, which passes through the centers of two membrane (diaphragm) springs 2, and is rigidly connected with them. The springs 2 are rigidly connected with their edges to the housing 3. The housing 3 is coaxially placed inside the external housing 4 with the possibility of free movement along a common axis. A sensor 5 of the housing 3 is rigidly fixed to the outer casing 4. The node for measuring the frequency of free oscillations of the rod is made in the form of a permanent magnet 6 mounted on the rod 1, and electromagnetic coil 7 placed on the housing 3 in the area of action of the magnet 6.
Краткое описание чертежей Brief Description of the Drawings
Заявляемое техническое решение иллюстрируется чертежом фиг.1 The claimed technical solution is illustrated by the drawing of figure 1
Промышленная применимость Процесс измерения внутриглазного давления с помощью заявляемого устройства осуществляется следующим образом. Устройство, удерживаемое рукой врача за внешний корпус 4, устанавливается штоком 1 на веко глаза пациента, после чего внешний корпус 4 перемещается в направлении века до смещения корпуса 3 относительно внешнего корпуса 4. Направление смещения корпуса 3 относительно внешнего корпуса 4 показано стрелкой на фиг.1. Указанное смещение измеряется датчиком 5 положения корпуса, при этом на глаз статически давит общий вес штока 1 , постоянного магнита 6, пружин 2, корпуса 3 и электромагнитной катушки 7 (не более 20 грамм). Соприкосновение штока 1 с корпусом 3 исключено, так как система шток 1 - пружины 2 характеризуется высокой угловой и поперечной жесткостью, обеспечивающей только осевое перемещение штока 1. Далее осуществляется периодический процесс измерения частоты свободных колебаний штока 1, состоящий из фазы принудительного выталкивания штока 1 относительно корпуса 3 путем кратковременной подачи электрического тока на электромагнитную катушку 7 и фазы измерения частоты свободных колебаний штока 1, которая определяется массой штока 1 с постоянным магнитом 6, жесткостью мембранных пружин 2 и внутриглазным давлением. ЭДС индукции, возбуждаемая в электромагнитной катушке 7 магнитным полем колеблющегося вместе со
штоком 1 постоянного магнита 6, используется для измерения частоты свободных колебаний штока, по которой определяют величину внутриглазного давления. Industrial applicability The process of measuring intraocular pressure using the inventive device is as follows. The device, held by the doctor’s hand by the outer casing 4, is installed by the rod 1 on the eyelid of the patient’s eye, after which the outer casing 4 moves in the direction of the eyelid until the casing 3 is displaced relative to the outer casing 4. The direction of displacement of the casing 3 relative to the outer casing 4 is shown by an arrow in FIG. . The indicated displacement is measured by the housing position sensor 5, while the total weight of the rod 1, the permanent magnet 6, the springs 2, the housing 3 and the electromagnetic coil 7 (no more than 20 grams) is statically pressed on the eye. The contact of the rod 1 with the housing 3 is excluded, since the system of the rod 1 - spring 2 is characterized by high angular and lateral stiffness, providing only axial movement of the rod 1. Then, a periodic process of measuring the frequency of free vibrations of the rod 1 is carried out, consisting of the phase of the forced pushing of the rod 1 relative to the housing 3 by short-term supply of electric current to the electromagnetic coil 7 and the phase of measuring the frequency of free oscillations of the rod 1, which is determined by the mass of the rod 1 with a constant volume 6, the stiffness of the membrane springs 2 and intraocular pressure. EMF induction excited in the electromagnetic coil 7 by a magnetic field oscillating together with rod 1 of a permanent magnet 6, is used to measure the frequency of free oscillations of the rod, which determine the value of intraocular pressure.
Таким образом, в предлагаемом устройстве результат измерения внутриглазного давления не зависит от начального статического давления и исключена вероятность касания штоком корпуса при колебаниях руки < врача. Thus, in the proposed device, the result of measuring the intraocular pressure does not depend on the initial static pressure and the probability of touching the body with the rod during oscillations of the arm <of the doctor is excluded.
Проведенные заявителем испытания предлагаемого устройства показали значительное повышение точности измерения внутриглазного давления по сравнению с устройством, принятым в качестве ближайшего аналога.
The applicant conducted tests of the proposed device showed a significant increase in the accuracy of measurement of intraocular pressure compared with the device adopted as the closest analogue.
Claims
ФОРМУЛА ИЗОБРЕТЕНИЯ CLAIM
Устройство измерения внутриглазного давления через веко, содержащее корпус, элемент деформации глазного яблока через веко, выполненный в виде штока, связанного с корпусом с помощью первой мембранной пружины, отличающееся тем, что шток жестко связан с корпусом посредством второй мембранной пружины, при этом корпус размещен с возможностью свободного перемещения во внешнем корпусе, оснащенном датчиком положения корпуса, постоянный магнит установлен на штоке, а взаимодействующая с ним электромагнитная катушка расположена на корпусе.
A device for measuring intraocular pressure through an eyelid containing a body, an element of deformation of the eyeball through the eyelid, made in the form of a rod connected to the body using the first membrane spring, characterized in that the rod is rigidly connected to the body by means of a second membrane spring, while the body is placed with the possibility of free movement in an external housing equipped with a housing position sensor, a permanent magnet is mounted on the rod, and the electromagnetic coil interacting with it is located on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/RU2011/000810 WO2013058671A1 (en) | 2011-10-18 | 2011-10-18 | Device for measuring intraocular pressure through the eyelid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/RU2011/000810 WO2013058671A1 (en) | 2011-10-18 | 2011-10-18 | Device for measuring intraocular pressure through the eyelid |
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| Publication Number | Publication Date |
|---|---|
| WO2013058671A1 true WO2013058671A1 (en) | 2013-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RU2011/000810 WO2013058671A1 (en) | 2011-10-18 | 2011-10-18 | Device for measuring intraocular pressure through the eyelid |
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| Country | Link |
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| WO (1) | WO2013058671A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104274153A (en) * | 2014-10-30 | 2015-01-14 | 武汉创博达信息科技有限公司 | Soft touch type horizontal or vertical intraocular pressure measuring device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU56152U1 (en) * | 2006-05-12 | 2006-09-10 | Геннадий Константинович Пилецкий | DEVICE FOR MEASURING INTERNAL EYE PRESSURE THROUGH THE EYE |
| US20090270711A1 (en) * | 2005-10-14 | 2009-10-29 | Stacey Jarvin | Pressure sensors and measurement methods |
| RU2376497C2 (en) * | 2004-12-23 | 2009-12-20 | Бсх Бош Унд Сименс Хаусгерете Гмбх | Linear compressor and its drive |
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2011
- 2011-10-18 WO PCT/RU2011/000810 patent/WO2013058671A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2376497C2 (en) * | 2004-12-23 | 2009-12-20 | Бсх Бош Унд Сименс Хаусгерете Гмбх | Linear compressor and its drive |
| US20090270711A1 (en) * | 2005-10-14 | 2009-10-29 | Stacey Jarvin | Pressure sensors and measurement methods |
| RU56152U1 (en) * | 2006-05-12 | 2006-09-10 | Геннадий Константинович Пилецкий | DEVICE FOR MEASURING INTERNAL EYE PRESSURE THROUGH THE EYE |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104274153A (en) * | 2014-10-30 | 2015-01-14 | 武汉创博达信息科技有限公司 | Soft touch type horizontal or vertical intraocular pressure measuring device and method |
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