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WO2000064328A1 - Reflectometre pour l'oreille - Google Patents

Reflectometre pour l'oreille Download PDF

Info

Publication number
WO2000064328A1
WO2000064328A1 PCT/EP2000/003207 EP0003207W WO0064328A1 WO 2000064328 A1 WO2000064328 A1 WO 2000064328A1 EP 0003207 W EP0003207 W EP 0003207W WO 0064328 A1 WO0064328 A1 WO 0064328A1
Authority
WO
WIPO (PCT)
Prior art keywords
ear
reflectometer
light guide
measuring tip
light
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.)
Ceased
Application number
PCT/EP2000/003207
Other languages
German (de)
English (en)
Inventor
Bernhard Kraus
Alexander KLÖS
Elke Kahler
Horst Mannebach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braun GmbH
Original Assignee
Braun GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Braun GmbH filed Critical Braun GmbH
Publication of WO2000064328A1 publication Critical patent/WO2000064328A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/227—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for ears, i.e. otoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/12—Audiometering
    • A61B5/121—Audiometering evaluating hearing capacity
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6814—Head
    • A61B5/6815—Ear
    • A61B5/6817—Ear canal

Definitions

  • the invention relates to an ear reflectometer with an observation device.
  • a conventional ear reflectometer measures the condition of the middle ear by emitting sound waves with different frequencies and registering the sound waves reflected on the eardrum. It usually has a measuring tip in which a sound source and a microphone are arranged in such a way that when the reflectometer is used, sound waves are emitted by the sound source through an end of the measuring tip on the auditory canal side in the direction of the eardrum and receive reflected sound waves from there through the microphone can be. In this way, the impedance of the eardrum can be measured.
  • the impedance of the middle ear changes with the amount of fluid that has accumulated in the middle ear.
  • the measurement result is noticeably determined by the respective geometry of an ear canal.
  • Bends can prevent the direct propagation of sound towards the eardrum, the impedance of which is to be determined.
  • Subjectively correct seating of the measuring tip in the ear is no guarantee of correct alignment of the loudspeaker and the microphone with the eardrum.
  • partial coverage of the field of view of the loudspeaker and the microphone leads to a strong directional dependence of the measured or reflected sound waves and thus to gross incorrect measurements with poor reproducibility.
  • a device for ear examination in which a sound source and a light source are arranged in a measuring tip.
  • the eardrum vibrates by emitting sound waves. Visible light emitted by the light source into the ear canal is reflected by the vibrating eardrum.
  • the reflected light is fed via a beam splitter to a photodetector and an eyepiece, so that the ear canal can be viewed and the measuring tip can be aligned in the direction of the eardrum.
  • US Pat. No. 5,239,984 describes an additional device for an otoscope, by means of which the image information supplied by the otoscope is supplied on the one hand to the eyepiece of the additional device and on the other hand through a beam splitter to a video camera. This makes it possible the attending physician to have the image information available in a practical way on a viewing device, which facilitates the alignment of the measuring tip in the ear canal.
  • the object of the present invention is to provide an ear reflectometer in which the correct alignment of the measuring tip in the ear canal can be checked.
  • an ear reflectometer according to the invention is provided with an observation device which preferably has an optical fiber.
  • a particularly advantageous light guide for an ear reflectometer according to the invention is a glass fiber bundle which extends from the front end of the measuring tip to an eyepiece or an image recording device and through which the ear canal can be viewed.
  • a lens is arranged at the front end of the measuring tip, to which the light guide is coupled at one end. The other end of the light guide is connected to the eyepiece and / or the image recording device.
  • An ear reflectometer according to the invention preferably also contains a light source for illuminating the ear canal, which is advantageously arranged in the measuring tip, so that light can enter the ear canal through an opening provided at the front end of the measuring tip.
  • the light guide has a coupling point at which light emitted by the light source can be coupled into the light guide.
  • the light guide then transmits the light to its front end and emits it into the ear canal.
  • the image information available on the eyepiece can advantageously be fed to a screen via a video camera by using a beam splitter or the like. The invention thus enables images of the inner ear canal and the eardrum during the treatment.
  • FIG. 1 shows a first embodiment of an ear reflectometer according to the invention, in which the light source is connected to the light guide via a branch;
  • Fig. 2 shows a second embodiment of an ear reflectometer according to the invention, in which the light source is arranged independently of the light guide in the measuring tip.
  • the ear reflectometer 10 has a measuring tip 1 with a sound outlet opening at its front end which, as shown in use, is inserted into the auditory canal 20 in order to determine the sound impedance of the eardrum 30.
  • a sound source 2 for example a loudspeaker, and a microphone 3 in miniature size are installed in the reflectometer 10 in a manner known per se, by means of which the impedance of the eardrum can be measured over a specific sound frequency range.
  • the auditory canal is illuminated by visible light from a light source 4, which is coupled into a light guide 5 via a branch.
  • the light guide 5 on the auditory canal side At the end of the light guide 5 on the auditory canal side, it is coupled to a lens 6.
  • the light cone 7 emerging through the lens 6 illuminates the auditory canal 20. A large part of the light reflected back from there arrives again through the lens 6 and is focused by the latter onto the light guide 5.
  • the light guide 5 is coupled at its end opposite the end on the auditory canal side to an eyepiece 8 through which the auditory canal and the alignment of the measuring tip 1 in the auditory canal can be viewed. However, it can also be provided, as indicated by an arrow, to feed the image information present on the eyepiece 8 to a viewing device 9, for example a screen, via a video camera.
  • the light source 4 is arranged separately in the measuring tip 1.
  • the inner walls of the measuring tip 1 are designed to be reflective.
  • the light source 4 can also be inserted in a suitable manner outside the measuring tip 1 together with the measuring tip 1 into the auditory canal. The latter is more complex to use, since the light source 4 must always be adjusted. However, this offers more possibilities in the positioning of the light source 4 and the preferred illumination of certain parts of the auditory canal.
  • the radiation from the light source 4 does not necessarily have to be in the visible spectral range.
  • an infrared-emitting light source can also be used, for example. If necessary or desirable, it is also possible to arrange a plurality of light sources whose emitted light radiation according to the first exemplary embodiment can be coupled into the light guide through a plurality of branches.
  • the light guide which can consist of a flexible or rigid glass fiber bundle, thus forms an endoscope according to the present invention, at one end of which the lens 6 is located and at the other end of which the eyepiece 8 is coupled.
  • the endoscope With a correspondingly large opening angle of the lens 6 and optimal illumination of the ear canal, the endoscope enables a direct view into the ear canal.
  • the lens 6 is preferably not significantly larger than the diameter of the light guide, so that there is still enough space for the sound outlet opening at the front end of the measuring tip.
  • the ear reflectometer In the ear reflectometer according to the invention, video recordings of the ear canal and the eardrum can be made, which can also be saved for possible later evaluations. This enables a direct examination of the ear canal and its morphology. Questions about the curvature of the ear canal and the amount of ear wax can be clarified. It can be investigated to what extent these factors influence an impedance measurement or how an impedance measurement can be improved. At the same time as measuring the impedance of the eardrum, an additional examination method is provided by looking directly into the ear canal. This makes it easier to diagnose pathological changes (e.g. fluid accumulation in the middle ear). The treating person also has the opportunity to show the patient pictures of his own ear canal and eardrum. B. Explain and present diagnosis and therapy in a more understandable way. With the arrangement according to the invention, it is also possible to detect a gross incorrect measurement, such as occurs, for example, when the measuring tip is placed directly on tissue.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Otolaryngology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne un réflectomètre pour l'oreille, qui comporte une pointe de mesure pouvant être introduite dans le canal auditif et un dispositif pour l'observation du canal auditif.
PCT/EP2000/003207 1999-04-22 2000-04-11 Reflectometre pour l'oreille Ceased WO2000064328A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999118288 DE19918288A1 (de) 1999-04-22 1999-04-22 Ohr-Reflektometer
DE19918288.4 1999-04-22

Publications (1)

Publication Number Publication Date
WO2000064328A1 true WO2000064328A1 (fr) 2000-11-02

Family

ID=7905498

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/003207 Ceased WO2000064328A1 (fr) 1999-04-22 2000-04-11 Reflectometre pour l'oreille

Country Status (2)

Country Link
DE (1) DE19918288A1 (fr)
WO (1) WO2000064328A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3213675A1 (fr) 2016-03-04 2017-09-06 Technische Universität Dresden Dispositif et procédé de tomographie optique par cohérence double (otc) sur l'oreille moyenne humaine

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6770080B2 (en) 2001-04-26 2004-08-03 Fenestra Medical, Inc. Mechanically registered videoscopic myringotomy/tympanostomy tube placement system
WO2007039843A2 (fr) * 2005-10-06 2007-04-12 Koninklijke Philips Electronics N.V. Otoscope avec dispositif audio integre pour ecoute par le patient
US8249700B2 (en) 2007-04-19 2012-08-21 Acclarent, Inc. System and method for the simultaneous bilateral integrated tympanic drug delivery and guided treatment of target tissues within the ears
US9770366B2 (en) 2009-07-15 2017-09-26 Tusker Medical, Inc. Tympanic membrane pressure equalization tube delivery system
US9539146B2 (en) 2009-07-15 2017-01-10 Tusker Medical, Inc. Trigger assembly for tympanostomy tube delivery device
US9320652B2 (en) 2013-03-14 2016-04-26 Tusker Medical, Inc. Features to improve and sense tympanic membrane apposition by tympanostomy tube delivery instrument
US9681891B2 (en) 2013-03-14 2017-06-20 Tusker Medical, Inc. Tympanostomy tube delivery device with cutting dilator
US20160038341A1 (en) 2014-08-08 2016-02-11 Acclarent, Inc. Tympanostomy tube delivery device with elastomeric brake
US10195086B2 (en) 2014-08-11 2019-02-05 Tusker Medical, Inc. Tympanostomy tube delivery device with rotatable
US9833360B2 (en) 2014-08-12 2017-12-05 Tusker Medical, Inc. Tympanostomy tube delivery device with replaceable shaft portion
US9833359B2 (en) 2014-08-12 2017-12-05 Tusker Medical, Inc. Tympanostomy tube delivery device with cutter force clutch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4434800A (en) 1981-06-10 1984-03-06 National Research Development Corporation Tympanometric apparatus
US4567881A (en) * 1983-03-31 1986-02-04 Welch Allyn Inc. Combination otoscope and audiometer
US5239984A (en) 1991-11-25 1993-08-31 Cane Richard M Hand-held opto-diagnostic instrument system
US5419312A (en) * 1993-04-20 1995-05-30 Wildflower Communications, Inc. Multi-function endoscope apparatus
WO1998023205A1 (fr) * 1996-11-25 1998-06-04 Mdi Instruments, Inc. Appareil et procede de diagnostic de l'oreille interne
US5893828A (en) * 1996-05-02 1999-04-13 Uram; Martin Contact laser surgical endoscope and associated myringotomy procedure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55110528A (en) * 1979-02-20 1980-08-26 Olympus Optical Co Endoscope
DE4234782A1 (de) * 1992-10-15 1994-04-21 Hortmann Gmbh Vorrichtung zur Überprüfung des Hörvermögens

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4434800A (en) 1981-06-10 1984-03-06 National Research Development Corporation Tympanometric apparatus
US4567881A (en) * 1983-03-31 1986-02-04 Welch Allyn Inc. Combination otoscope and audiometer
US5239984A (en) 1991-11-25 1993-08-31 Cane Richard M Hand-held opto-diagnostic instrument system
US5419312A (en) * 1993-04-20 1995-05-30 Wildflower Communications, Inc. Multi-function endoscope apparatus
US5893828A (en) * 1996-05-02 1999-04-13 Uram; Martin Contact laser surgical endoscope and associated myringotomy procedure
WO1998023205A1 (fr) * 1996-11-25 1998-06-04 Mdi Instruments, Inc. Appareil et procede de diagnostic de l'oreille interne

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3213675A1 (fr) 2016-03-04 2017-09-06 Technische Universität Dresden Dispositif et procédé de tomographie optique par cohérence double (otc) sur l'oreille moyenne humaine
DE102016203608A1 (de) 2016-03-04 2017-09-07 Technische Universität Dresden Vorrichtung und System zur Doppler optischen Kohärenztomografie (OCT) am humanen Mittelohr
US10682058B2 (en) 2016-03-04 2020-06-16 Technische Universität Dresden Device and system for doppler optical coherence tomography (OCT) of the human middle ear

Also Published As

Publication number Publication date
DE19918288A1 (de) 2000-10-26

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