CA2147149A1 - A device for examining the eye, in particular the human eye - Google Patents
A device for examining the eye, in particular the human eyeInfo
- Publication number
- CA2147149A1 CA2147149A1 CA002147149A CA2147149A CA2147149A1 CA 2147149 A1 CA2147149 A1 CA 2147149A1 CA 002147149 A CA002147149 A CA 002147149A CA 2147149 A CA2147149 A CA 2147149A CA 2147149 A1 CA2147149 A1 CA 2147149A1
- Authority
- CA
- Canada
- Prior art keywords
- eye
- mounting
- probe
- examining
- pressure sensor
- 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.)
- Abandoned
Links
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/10—Eye inspection
-
- 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
-
- 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
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
- A61B3/125—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes with contact lenses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52046—Techniques for image enhancement involving transmitter or receiver
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Ophthalmology & Optometry (AREA)
- Radiology & Medical Imaging (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Eye Examination Apparatus (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
Described is a device for examining the eye us-ing an ultrasonic probe, the device being designed to measure and record, reliably and reproducibly, all the main eye blood-circulation parameters. To this end, a mounting (1) is placed on the eye, the side of the mounting facing the eye having a concave recess which matches the curvature of the eyeball. Fitted inside the mounting (1) is a measurement probe (2) which is de-signed as a transceiver for pulsed signals and which in-cludes both a pulse generator and a processing circuit suitable for measuring the Doppler effect.
Description
- - - 21~7149 A DEVICE FOR ~MT~ING THE EYE, IN PARTICULAR THE HUMAN EYE
The present invention relates to an apparatus for examining the eye, in particular the human eye, as set out in the preamble to Claim 1.
Known methods for examining the eye, in particular for pre-operative examination, are relatively uncertain and imprecise for the physician and for the diagnostician. In particular, they do not provide any values that can be replicated and compared to each other.
The assessment and quantification of retinal blood circulation with so-called indirect ophthalmoscopy does not provide any reliable and replicable measured values.
AT-PS 227 868 describes a device for examining the human eye and for identifying functions and states using a measuring probe that is arranged in a mounting that can be set upon the eye. An ultrasonic converter is used when this is done. In this known device, the surface of the lens that is closest to the eye is concavely curved so as to match the curvature of the eyeball.
This known device functions as an ultrasonic echo sounding device.
US-PS 5 032 020 describes a device for examining the human eye in which a pressure sensor is arranged in a mounting that is configured as a contact glass and this pressure sensor permits measurement of the pressure within the eye.
The present invention relates to an apparatus for examining the eye, in particular the human eye, as set out in the preamble to Claim 1.
Known methods for examining the eye, in particular for pre-operative examination, are relatively uncertain and imprecise for the physician and for the diagnostician. In particular, they do not provide any values that can be replicated and compared to each other.
The assessment and quantification of retinal blood circulation with so-called indirect ophthalmoscopy does not provide any reliable and replicable measured values.
AT-PS 227 868 describes a device for examining the human eye and for identifying functions and states using a measuring probe that is arranged in a mounting that can be set upon the eye. An ultrasonic converter is used when this is done. In this known device, the surface of the lens that is closest to the eye is concavely curved so as to match the curvature of the eyeball.
This known device functions as an ultrasonic echo sounding device.
US-PS 5 032 020 describes a device for examining the human eye in which a pressure sensor is arranged in a mounting that is configured as a contact glass and this pressure sensor permits measurement of the pressure within the eye.
2 1 ~ i US-PS 5 109 852 describes a device with a special pressure sensor that is transparent and can be worn by a patient for a protracted period of time thereby permitting continuous measurement of the internal pressure in the eye.
US-PS 4 823 801 describes a device for examining the states of the human eye, which measures the thickness of the cornea.
US-PS 4 485 820 describes a device for continuous identification of haemoglobin saturation in the blood of newborn infants; this device incorporates a mounting that can be set upon the eye and optical fibres used as probes end in this and lead to a light source or a photo-detector in an analytical apparatus.
Finally, DE-OS 2 639 635 describes a device for producing the electro-retinogram with a mounting that can be set upon the eye, within which electrical contacts to pick up the potentials/voltages are arranged and used as probes.
It is the task of the present invention to create a device with which all the main eye blood circulation parameters can be measured and recorded reliably and reproducibly.
According to the present invention, this problem has been solved with the help of the features set out in patent Claim 1.
Advantageous developments are set out in the secondary claims.
Using the device according to the present invention, it is possible to measure the blood flow within the human eye as well as the direction of flow of the blood through the human eye, and do this accurately. In addition, it is also possible to measure - 21~7149 the blood pressure within the eye at the same time. Up to now, these measurements were made either not at all or only imprecisely, for the probes that were used for this purpose could not be fixed precisely on the eye.
A further advantage of the device according to the present invention is that it is possible to perform a functional blood flow diagnosis in media that are not clear or clouded, for example, for preoperative diagnosis and prognosis in cataract surgery.
Last, but by no means least, it is possible to set up a contact mirror fundoscope.
All of these advantages and possibilities are achieved, in particular, in that the device according to the present invention has a measurement probe that is arranged either in or on the mounting that can be set upon the eye. The probe is an ultrasonic-Doppler probe or a laser-Doppler probe, whereas the mounting is a body that is of glass or special (not necessarily transparent) material such as plastic that has a foot that incorporates a contact surface that is matched to the external curvature of the eye, and in particular of the human eye.
In order to measure the internal pressure within the eye, which depends not least on blood pressure, a pressure sensor can also be incorporated within the mounting and this can be brought into contact with the surface of the human eye that is available for measurement, this being done more or less directly.
This makes it possible to place the measuring probe and simultaneously the pressure sensor exactly so as to be able to carry out measurements that are precise and replicable.
The drawings show one embodiment of a device according to the present invention that is used to examine the human eye. These drawings show the following:
igure 1: a perspective view of the apparatus according to the present invention as set upon a human eye, in vertical cross-section;
Figure 2: a view, in section as in Figure 1, of the apparatus according to the present invention that is set on a human eye.
The device that is shown in the drawing consists of a mounting 1 that is essentially in the form of a truncated cone, in which the probe 2 that is intended for the measurements that are to be taken is inserted, this being done in such a way that it is inclined to the mid-line axis 3 of the truncated conical mounting 1, preferably parallel to the conical surface 4 of the mounting 1. The probe is directed towards the point where the optic artery enters the eyeball. This is a critical prerequisite for carrying out measurements.
The probe 2 can be a Doppler probe, i.e., a sonic or ultrasonic probe, although it can equally well be a laser probe. For the present invention, it is important that the probe 2 can be positioned precisely and reproducibly by means of the mounting 1 that can be set on an eye--in particular a human eye--for purposes of measurement and other types of e~rination. To this end, in its foot area, the holder 1 has a spherical contact surface 5 that is curved concavely inward and is matched to the external curvature 6 of the eye 7 that is to be examined. ~or this reason, the holder 1 with the probe 2 that is accommodated within it can be set directly on the eye 7 in order to carry out the desired measurements.
Because of the special arrangement of the Doppler probe 2 within the contact glass of the holder 1, the measured volumes can be determined at the end of the optic nerve when the holder 1 is set on the eye, and this can be done rapidly and safely, since, because of the arrangement of the axis of the probe and the receptacle of the eye that is relevant in this connection are aligned. The result of this is that the cosine in the following formula assumes a value of l.0 and thus corresponds to the measured velocity of the effective Doppler shift, which means that comparable measurements are possible for the first time.
fDOppler = k cos a V~lood n this formula: fDOppler = Doppler frequency k = constant a = the angle between the direction of blood flow and the probe axis v~l0Od = blood velocity In the embodiment that is shown, within the outer circular edge 8 of the holder 1 that is proximate to the eye 7, there is an annular pressure sensor 9 that has a sufficiently large contact surface; the internal pressure within the eye 7 can be measured with this sensor when the holder 1 is set upon the eye 7. The sufficiently large contact surface is very important because the pressure with which the holder 1 is applied and thus the pressure .. . . .
.. ..
21~7199 of the annular pressure sensor 9 on the eyeball must be increased briefly in order to carry out blood pressure measurements, which are described in detail below. Were the contact surface too small, this could damage the eyeball.
In order to measure blood pressure, the contact glass or the holder 1 is set on the eye in such a way that the axis of the probe is directed precisely at the point where the optic artery 11 enters the eyeball. If the holder 1 is transparent, this can be checked visually by the physician. In the case of a non-transparent holder 1, the ultrasonic probe can be set up optically and acoustically using the quality of the Doppler signal. The orientation is correct when the greatest distance is determined using the echo sounding procedure.
By pressing the holder 1 on the eyeball, the internal pressure within the eyeball is increased to the point that no more signal is detected by the ultrasonic Doppler probe. This means that the pressure that is applied corresponds to the systolic blood pressure in the arteria centralis retinae. If the previously generated increase in pressure is once again effected retrogressively, one then obtains the diastolic pressure at which the blood once again begins to pulse with the vena centralis retinae.
Thus, very precise and reproducible blood pressure measurements can be made by using the Doppler probe 2 in conjunction with the pressure sensor 9.
Piezo foil or a piezo crystal are examples of pressure sensors that can be used and these are preferably arranged in the form of a ring on the mounting 1.
As is shown in particular in Figure 1, using the device according to the present invention it is possible to set the probe 2 that is intended for the measurements on a human 7 in such a way that this probe 2 is directed exactly at the entry point 10 for the optic nerve and for the optic artery 11 of the eye that is located there.
Thus, it is now possible for the first time to arrive at comparable and reproducible measured values of the kind that are an absolute prerequisite for long-term diagnoses. Only in this way can the physician compare changes in the eye that take place over long time periods with each other using the diagrams that are produced and arrive at meaningful conclusions concerning the course of the disorder.
US-PS 4 823 801 describes a device for examining the states of the human eye, which measures the thickness of the cornea.
US-PS 4 485 820 describes a device for continuous identification of haemoglobin saturation in the blood of newborn infants; this device incorporates a mounting that can be set upon the eye and optical fibres used as probes end in this and lead to a light source or a photo-detector in an analytical apparatus.
Finally, DE-OS 2 639 635 describes a device for producing the electro-retinogram with a mounting that can be set upon the eye, within which electrical contacts to pick up the potentials/voltages are arranged and used as probes.
It is the task of the present invention to create a device with which all the main eye blood circulation parameters can be measured and recorded reliably and reproducibly.
According to the present invention, this problem has been solved with the help of the features set out in patent Claim 1.
Advantageous developments are set out in the secondary claims.
Using the device according to the present invention, it is possible to measure the blood flow within the human eye as well as the direction of flow of the blood through the human eye, and do this accurately. In addition, it is also possible to measure - 21~7149 the blood pressure within the eye at the same time. Up to now, these measurements were made either not at all or only imprecisely, for the probes that were used for this purpose could not be fixed precisely on the eye.
A further advantage of the device according to the present invention is that it is possible to perform a functional blood flow diagnosis in media that are not clear or clouded, for example, for preoperative diagnosis and prognosis in cataract surgery.
Last, but by no means least, it is possible to set up a contact mirror fundoscope.
All of these advantages and possibilities are achieved, in particular, in that the device according to the present invention has a measurement probe that is arranged either in or on the mounting that can be set upon the eye. The probe is an ultrasonic-Doppler probe or a laser-Doppler probe, whereas the mounting is a body that is of glass or special (not necessarily transparent) material such as plastic that has a foot that incorporates a contact surface that is matched to the external curvature of the eye, and in particular of the human eye.
In order to measure the internal pressure within the eye, which depends not least on blood pressure, a pressure sensor can also be incorporated within the mounting and this can be brought into contact with the surface of the human eye that is available for measurement, this being done more or less directly.
This makes it possible to place the measuring probe and simultaneously the pressure sensor exactly so as to be able to carry out measurements that are precise and replicable.
The drawings show one embodiment of a device according to the present invention that is used to examine the human eye. These drawings show the following:
igure 1: a perspective view of the apparatus according to the present invention as set upon a human eye, in vertical cross-section;
Figure 2: a view, in section as in Figure 1, of the apparatus according to the present invention that is set on a human eye.
The device that is shown in the drawing consists of a mounting 1 that is essentially in the form of a truncated cone, in which the probe 2 that is intended for the measurements that are to be taken is inserted, this being done in such a way that it is inclined to the mid-line axis 3 of the truncated conical mounting 1, preferably parallel to the conical surface 4 of the mounting 1. The probe is directed towards the point where the optic artery enters the eyeball. This is a critical prerequisite for carrying out measurements.
The probe 2 can be a Doppler probe, i.e., a sonic or ultrasonic probe, although it can equally well be a laser probe. For the present invention, it is important that the probe 2 can be positioned precisely and reproducibly by means of the mounting 1 that can be set on an eye--in particular a human eye--for purposes of measurement and other types of e~rination. To this end, in its foot area, the holder 1 has a spherical contact surface 5 that is curved concavely inward and is matched to the external curvature 6 of the eye 7 that is to be examined. ~or this reason, the holder 1 with the probe 2 that is accommodated within it can be set directly on the eye 7 in order to carry out the desired measurements.
Because of the special arrangement of the Doppler probe 2 within the contact glass of the holder 1, the measured volumes can be determined at the end of the optic nerve when the holder 1 is set on the eye, and this can be done rapidly and safely, since, because of the arrangement of the axis of the probe and the receptacle of the eye that is relevant in this connection are aligned. The result of this is that the cosine in the following formula assumes a value of l.0 and thus corresponds to the measured velocity of the effective Doppler shift, which means that comparable measurements are possible for the first time.
fDOppler = k cos a V~lood n this formula: fDOppler = Doppler frequency k = constant a = the angle between the direction of blood flow and the probe axis v~l0Od = blood velocity In the embodiment that is shown, within the outer circular edge 8 of the holder 1 that is proximate to the eye 7, there is an annular pressure sensor 9 that has a sufficiently large contact surface; the internal pressure within the eye 7 can be measured with this sensor when the holder 1 is set upon the eye 7. The sufficiently large contact surface is very important because the pressure with which the holder 1 is applied and thus the pressure .. . . .
.. ..
21~7199 of the annular pressure sensor 9 on the eyeball must be increased briefly in order to carry out blood pressure measurements, which are described in detail below. Were the contact surface too small, this could damage the eyeball.
In order to measure blood pressure, the contact glass or the holder 1 is set on the eye in such a way that the axis of the probe is directed precisely at the point where the optic artery 11 enters the eyeball. If the holder 1 is transparent, this can be checked visually by the physician. In the case of a non-transparent holder 1, the ultrasonic probe can be set up optically and acoustically using the quality of the Doppler signal. The orientation is correct when the greatest distance is determined using the echo sounding procedure.
By pressing the holder 1 on the eyeball, the internal pressure within the eyeball is increased to the point that no more signal is detected by the ultrasonic Doppler probe. This means that the pressure that is applied corresponds to the systolic blood pressure in the arteria centralis retinae. If the previously generated increase in pressure is once again effected retrogressively, one then obtains the diastolic pressure at which the blood once again begins to pulse with the vena centralis retinae.
Thus, very precise and reproducible blood pressure measurements can be made by using the Doppler probe 2 in conjunction with the pressure sensor 9.
Piezo foil or a piezo crystal are examples of pressure sensors that can be used and these are preferably arranged in the form of a ring on the mounting 1.
As is shown in particular in Figure 1, using the device according to the present invention it is possible to set the probe 2 that is intended for the measurements on a human 7 in such a way that this probe 2 is directed exactly at the entry point 10 for the optic nerve and for the optic artery 11 of the eye that is located there.
Thus, it is now possible for the first time to arrive at comparable and reproducible measured values of the kind that are an absolute prerequisite for long-term diagnoses. Only in this way can the physician compare changes in the eye that take place over long time periods with each other using the diagrams that are produced and arrive at meaningful conclusions concerning the course of the disorder.
Claims (5)
1. A device with an ultrasonic probe for examining the eye and for measuring and identifying functions and states of the same by using a mounting that can be set on the eye and which is essentially in the form of a truncated cone, the cone tapering conically in the direction towards the eye and at the eye end having a concave recess that corresponds to the curvature of the eyeball, characterized in that within the mounting (1) and essentially parallel to the outer surface of the conical cone there is a measuring probe (2) that is configured as a transmitter and receiver for pulse-like signals and in addition to the pulse transmitter has an analytical apparatus that is suitable for picking up the Doppler effect.
2. A device as defined in Claim 1, characterized in that a pressure sensor (9) is arranged in the edge (8) around the curved contact surface (5) of the mounting (1).
3. A device as defined in one of the Claims 1 or 2, characterized in that the mounting (1) is of transparent material.
4. A device as defined in Claim 3, characterized in that the mounting (1) is of glass.
5. A device as defined in one of the Claims 1 to 3, characterized in that there is also a pressure sensor (9) on the contact surface of the mounting (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4235079.4 | 1992-10-17 | ||
| DE4235079A DE4235079C2 (en) | 1992-10-17 | 1992-10-17 | Device for examining the eye, in particular the human eye |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2147149A1 true CA2147149A1 (en) | 1994-04-28 |
Family
ID=6470725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002147149A Abandoned CA2147149A1 (en) | 1992-10-17 | 1993-10-14 | A device for examining the eye, in particular the human eye |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0664684B1 (en) |
| JP (1) | JPH08502188A (en) |
| KR (1) | KR950703302A (en) |
| AT (1) | ATE162702T1 (en) |
| AU (1) | AU5148193A (en) |
| CA (1) | CA2147149A1 (en) |
| DE (2) | DE4235079C2 (en) |
| ES (1) | ES2114618T3 (en) |
| WO (1) | WO1994008510A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10898381B2 (en) | 2003-06-02 | 2021-01-26 | Carl Zeiss Meditec Ag | Method and apparatus for precision working of material |
| US11576648B2 (en) | 2018-03-05 | 2023-02-14 | Fujifilm Corporation | Ultrasound diagnostic apparatus and method for controlling ultrasound diagnostic apparatus |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19514796C1 (en) * | 1995-04-21 | 1996-09-19 | Bernhard Dr Med Loew | Ophthalmodynamometer and method for operating the same |
| ES2116944B1 (en) * | 1996-12-26 | 1999-03-01 | Carreras Egana Fcp Javier | EYE TONOMETER THROUGH LASER INTERFEROMETRY AND ULTRASONICS. |
| DE102005062238A1 (en) * | 2005-12-22 | 2007-07-05 | Carl Zeiss Meditec Ag | Ophthalmological measurement system for measuring biometric eye data has evaluation unit that uses measurement values of optical measurement device and/or ultrasonic measurement device to determine biometric data of an eye |
| DE102009022598A1 (en) | 2009-05-20 | 2010-11-25 | Carl Zeiss Meditec Ag | Human eye's absolute measuring value determining method, involves reconstructing medium of eye by local scaling factors such that two-dimensional or three-dimensional representation of medium of eye comprises absolute measuring values |
| DE102009022958A1 (en) | 2009-05-28 | 2010-12-02 | Carl Zeiss Meditec Ag | Device and method for the optical measurement of relative distances |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT227868B (en) * | 1962-04-26 | 1963-06-10 | P Kretz Tech Werkstaetten Dipl | Device for eye examination with ultrasound |
| US3597964A (en) * | 1968-03-08 | 1971-08-10 | Optotechnik Gmbh | Device for testing by applanation |
| US3948248A (en) * | 1974-09-05 | 1976-04-06 | Zuckerman Joel L | Method of measuring ocular pulse |
| DE2639635A1 (en) * | 1976-08-31 | 1978-03-02 | Taeumer Reiner | Electro-retinogram obtained by measuring voltage at cornea - has small liq. electrolyte vessel attached to cornea and connected to lens |
| US4485820A (en) * | 1982-05-10 | 1984-12-04 | The Johns Hopkins University | Method and apparatus for the continuous monitoring of hemoglobin saturation in the blood of premature infants |
| US4823801A (en) * | 1985-11-01 | 1989-04-25 | Canon Kabushiki Kaisha | Cornea thickness measuring ultrasonic probe |
| FR2592784B1 (en) * | 1986-01-10 | 1992-05-07 | Strauss Andreas | APPARATUS FOR MEASURING BLOOD PRESSURE, ESPECIALLY IN THE OPHTHALMIC ARTERY |
| FR2602663A1 (en) * | 1986-08-14 | 1988-02-19 | Kedra Antoni | Probe and apparatus for measuring blood pressure, in particular in the ophthalmic artery |
| CH673760A5 (en) * | 1988-02-09 | 1990-04-12 | Yves Dr Med Robert | |
| US4930512A (en) * | 1988-06-16 | 1990-06-05 | Sonomed, Inc. | Hand held spring-loaded ultrasonic probe |
| US4930507A (en) * | 1988-09-23 | 1990-06-05 | Welch Allyn, Inc. | Double chamber acoustical tonometer |
| GB8909491D0 (en) * | 1989-04-26 | 1989-06-14 | Glynn Christopher J | Device for real-time monitoring of human or animal bodily functions |
| US5109852A (en) * | 1990-06-08 | 1992-05-05 | Kaye David B | Method for sensing pressure in an object |
-
1992
- 1992-10-17 DE DE4235079A patent/DE4235079C2/en not_active Expired - Fee Related
-
1993
- 1993-10-14 CA CA002147149A patent/CA2147149A1/en not_active Abandoned
- 1993-10-14 ES ES93922499T patent/ES2114618T3/en not_active Expired - Lifetime
- 1993-10-14 EP EP93922499A patent/EP0664684B1/en not_active Expired - Lifetime
- 1993-10-14 KR KR1019950701461A patent/KR950703302A/en not_active Application Discontinuation
- 1993-10-14 WO PCT/DE1993/000992 patent/WO1994008510A1/en active IP Right Grant
- 1993-10-14 DE DE59308085T patent/DE59308085D1/en not_active Expired - Fee Related
- 1993-10-14 AT AT93922499T patent/ATE162702T1/en not_active IP Right Cessation
- 1993-10-14 JP JP6509513A patent/JPH08502188A/en active Pending
- 1993-10-14 AU AU51481/93A patent/AU5148193A/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10898381B2 (en) | 2003-06-02 | 2021-01-26 | Carl Zeiss Meditec Ag | Method and apparatus for precision working of material |
| US11576648B2 (en) | 2018-03-05 | 2023-02-14 | Fujifilm Corporation | Ultrasound diagnostic apparatus and method for controlling ultrasound diagnostic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08502188A (en) | 1996-03-12 |
| AU5148193A (en) | 1994-05-09 |
| DE59308085D1 (en) | 1998-03-05 |
| ES2114618T3 (en) | 1998-06-01 |
| EP0664684A1 (en) | 1995-08-02 |
| WO1994008510A1 (en) | 1994-04-28 |
| DE4235079A1 (en) | 1994-04-21 |
| KR950703302A (en) | 1995-09-20 |
| EP0664684B1 (en) | 1998-01-28 |
| ATE162702T1 (en) | 1998-02-15 |
| DE4235079C2 (en) | 1996-08-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |