EP0513279B1 - Dispositif pour la generation d'ondes sonores acoustiques focalisees - Google Patents

Dispositif pour la generation d'ondes sonores acoustiques focalisees Download PDF

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Publication number
EP0513279B1
EP0513279B1 EP91920223A EP91920223A EP0513279B1 EP 0513279 B1 EP0513279 B1 EP 0513279B1 EP 91920223 A EP91920223 A EP 91920223A EP 91920223 A EP91920223 A EP 91920223A EP 0513279 B1 EP0513279 B1 EP 0513279B1
Authority
EP
European Patent Office
Prior art keywords
sonic generator
segments
sound
axis
sound waves
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.)
Expired - Lifetime
Application number
EP91920223A
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German (de)
English (en)
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EP0513279A1 (fr
Inventor
Ernst Marlinghaus
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.)
Storz Medical AG
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Storz Medical AG
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Publication date
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Publication of EP0513279A1 publication Critical patent/EP0513279A1/fr
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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors

Definitions

  • the sound generating unit is a body which is rotationally symmetrical with respect to an axis passing through the focus point, the body of which shell surface extending in the direction of this axis is the radiation surface for the sound waves.
  • the axially symmetrically emitted sound waves are focused by a reflector, which is a paraboloid in the case of a cylindrical sound generating unit, for example.
  • a flat, ring-shaped sound source which emits the sound waves in the “backward direction” onto a reflector, which then “focuses the sound waves through the ring”.
  • Another device for generating sound waves is known from DE 32 41 026 C3, for example, in which the shock waves generated by a spark gap are focused by an ellipsoid.
  • EP-A-0 209 053 a device for the contact-free destruction of concrements in the body of living beings is known, in which the electromagnetic sound generating unit has the shape of a spherical cap, so that "focused sound waves" are already emitted.
  • DE 35 01 838 A1 discloses a device for generating shock waves at different times, in which a flat sound generating unit is used, the sound waves of which are a first conical reflector redirects to a second reflector, which then focuses the sound waves.
  • the focus zone has largely fixed dimensions that are typical for a specific design of the sound generating unit and that can be varied slightly at most.
  • small stones can be treated gently with small focus zones.
  • Larger stones or multiple stones can, on the other hand, be treated more cheaply with an extended focus zone.
  • EP-A-0 367 117 discloses a device for generating focused acoustic sound waves for therapeutic applications with a sound generating unit which has at least one sound radiation surface from which sound waves are emitted which are focused by the focusing zone, the focusing unit and / or the sound generating unit is divided into segments. This document is regarded as the generic state of the art.
  • EP-A-0 367 117 lists three options in the form of a final list. The best possible The variant shown is to control the individual segments differently electronically, which results in a good solution to the variation of the focus geometry.
  • EP-A-0 367 117 it is not known from EP-A-0 367 117 to make the segments of the focusing unit movable relative to one another and to provide a housing in addition to the focusing unit which surrounds the focusing unit in a liquid-tight manner.
  • the invention is based on the object of a therapy device for crushing concrements, having a sound generation unit which has at least one sound radiation surface which generates acoustic sound waves in a liquid serving as a coupling medium, and a focusing unit which focuses the sound waves into a focus of variable size , the sound generating unit and / or the focusing unit being subdivided into segments in such a way that the focus zone can be widened easily and inexpensively for certain applications.
  • At least the focusing unit is divided into segments that are movable relative to one another.
  • the coupling medium is a liquid and if a housing is provided which at least surrounds the focusing unit and which has an opening which is closed by a sound-permeable, acoustically adapted membrane.
  • This design results in a liquid-tight design in a simple manner, which allows handling of the device according to the invention in the same way as conventional devices.
  • the segments are sealed in a liquid-tight manner with the exception of a sound outlet opening.
  • the sound outlet openings are connected to a liquid-tight space which has an opening which is closed by a sound-permeable, acoustically adapted membrane.
  • the segments can be pivoted independently of one another about the focal point. Furthermore, the segments can be pivoted independently of one another about an axis running through the focal point (claim 13) or displaceable relative to one another.
  • the number of segments is at least two, but three, four or more segments can also be used.
  • the focusing unit can have the shape of a spherical cap, the intersecting curves of which are essentially second-order curves (claim 2).
  • the intersecting curves of which are essentially second-order curves (claim 2).
  • the sound generating unit can be identical to the surface of the focusing unit or, according to claim 6, can be a rotationally symmetrical body in the initial state, the outer surface of which extends in the direction of the axis of rotation and represents a radiation surface for axially symmetrical sound waves, the direction of propagation of which is essentially perpendicular to the axis of rotation, and which the dome-shaped reflector focuses on.
  • the sound generating unit piezo vibrator (claim 4 or 11) or an electromagnetic pressure wave generating unit, but also other sound generating elements, such as magnetostrictive vibrator, etc. have (claim 5 or 11).
  • the dome-shaped focusing unit is a reflector that focuses the sound waves emanating from the sound radiation surface (s) (claim 6), it is also possible that the sound generating unit in on is known to be a spark gap, so that the reflector has the shape of an ellipsoid (claim 7)
  • the sound generating unit in the initial state is a rotationally symmetrical body, the lateral surface of which extends in the direction of the axis of rotation represents a radiation surface for axially symmetrical sound waves, the direction of propagation of which is essentially perpendicular to the axis of rotation, and which the spherical reflector focuses, it is preferred if the rotationally symmetrical body is also divided into segments that are movable together with the associated segments of the spherical reflector.
  • the device according to the invention also allows the simple integration of an X-ray and / or ultra-sound locating device for concrements, the observation axis of which intersects the axis of the sound generating device at the focal point or extends in the axis of the sound generating unit (claim 16).
  • the observation axis of the X-ray and / or ultrasound locating device runs in the axis of the sound generating unit, it is possible to design the device in such a way that the possibility of movement of the individual segments is used to ensure that their (apart) movement occurs serves to release the observation axis of the locating device, so that a space-saving arrangement of the individual elements is possible.
  • a device for generating focused acoustic sound waves for therapeutic applications and in particular for the crushing of concretions is shown, which in the basic state, i.e. the state in which the segments have not moved (apart) is similar to the device described in DE 38 35 318 C1.
  • the device has a sound generation unit 1, which can be an electromagnetic, magnetostrictive or piezoelectric pressure wave generation unit, for example, and which is a rotationally symmetrical body in the initial state.
  • both the sound generation unit 1 and the reflector 5 are divided into two segments (1, 1 'and 5, 5') in the embodiment shown, which are relative in the embodiment shown are movable relative to one another in that they can be pivoted independently of one another about the focus point F or an axis passing through the focus point.
  • the movement of the reflector segments 5 and 5 'takes place together with the assigned segments of the sound generating unit 1 and 1'.
  • the figure shows the case in which the individual parts have already been pivoted by the angle ⁇ .
  • the in practice "elongated" focus zones of the reflector segments 5 and 5 ' are also rotated relative to one another by the angle ⁇ , so that a broadened focus zone results as the total focus zone, ie as a superimposition of the two individual focus zones.
  • a housing which the sound generating unit 1, 1 ' and surrounds the reflector 5, 5 'and which has an opening which is closed in the manner described, for example, in DE 38 35 318 C1 by a sound-permeable, acoustically adapted membrane.
  • the housing and the membrane are not shown in the figure.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Surgical Instruments (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Claims (17)

  1. Dispositif thérapeutique, en particulier à détruire des concrétions, comprenant
    - un générateur sonore (1) prévu d'au moins une surface émettrice du son, qui engendre des des ondes sonores acoustiques (4) dans un liquide qui sert en tant que milieu de couplage, et
    - une unité de focalisation (5) à focaliser les ondes sonores dans un foyer (F) à grandeur variable, dans lequel ledit générateur sonore (1) et/ou lesdits moyens de focalisation sont divisés en segments (1, 1', 5, 5'),
    caractérisé en ce qu'un carter est prévu à compléter ladite unité de focalisation (5) et ledit générateur sonore (1), qui entoure ladite unité de focalisation et ledit générateur sonore pour les rendre étanches à liquides, et qui est prévu d'une ouïe fermé par une membrane perméable au son et adaptée sur le plan acoustique, et
    en ce que les segments de ladite unité de focalisation (5, 5') et/ou dudit générateur sonore (1, 1') sont mobile l'un relativement à l'autre.
  2. Dispositif selon la revendication 1,
    caractérisé en ce que ladite unité de focalisation la la forme d'une calotte sphérique dont les courbes de section sont essentiellement des courbes du 2me ordre.
  3. Dispositif selon la revendication 2,
    caractérisé en ce que la surface émettrice du son dudit générateur sonore est identique à la surface de ladite unité de focalisation.
  4. Dispositif selon la revendication 3,
    caractérisé en ce que ledit générateur sonore comprend des transducteurs piézoélectriques qui sont disposés en forme d'une calotte sphérique.
  5. Dispositif selon la revendication 3,
    caractérisé en ce que ledit générateur sonore est un générateur électromagnétique à engendre des ondes de pression, qui est disposé en forme d'une calotte sphérique.
  6. Dispositif selon la revendication 2,
    caractérisé en ce que ladite unité de focalisation sous forme d'une calotte sphérique est un réflecteur (5) qui focalise les ondes sonores (4), qui proviennent de la ou des surface(s) émettrice(s) du son.
  7. Dispositif selon la revendication 6,
    caractérisé en ce que ledit générateur sonore est un éclateur, de façon connue en soi, et en ce que ledit réflecteur a la forme d'un ellipsoïde.
  8. Dispositif selon la revendication 6,
    caractérisé en ce qu'en état initial, ledit générateur sonore est un corps à symétrie de révolution, dont la nappe, qui s'étend au sens de l'axe de révolution, constitue une surface qui émet des ondes sonores à symétrie de révolution (4), dont le sens de propagation est essentiellement orthogonal à l'axe de révolution (2) et qui sont focalisées par ledit réflecteur (5) sous forme d'une calotte sphérique.
  9. Dispositif selon la revendication 8,
    caractérisé en ce que ladite nappe (3) est la surface émettrice dudit générateur sonore (1).
  10. Dispositif selon la revendication 8,
    caractérisé en ce que ladite nappe (3) est la surface d'un réflecteur qui change la direction des ondes sonores (4) qui proviennent d'un générateur sonore plat (1).
  11. Dispositif selon la revendication 9 ou 10,
    caractérisé en ce que ledit générateur sonore (1) est un générateur des ondes de pression électromagnétique ou piézoélectrique.
  12. Dispositif selon une quelconque des revendications 1 à 11,
    caractérisé en ce que les segments sont pivotants autour du point focal, indépendamment l'un de l'autre.
  13. Dispositif selon une quelconque des revendications 1 à 11,
    caractérisé en ce que les segments sont pivotants, indépendamment l'un de l'autre, autour d'un axe qui passe par le point focal.
  14. Dispositif selon une quelconque des revendications 1 à 11,
    caractérisé en ce que les segments sont déplaçables l'un relativement à l'autre.
  15. Dispositif selon une quelconque des revendications 1 à 14,
    caractérisé en ce qu'au moins deux segments n'ont pas un point focal commun.
  16. Dispositif selon une quelconque des revendications 1 à 15,
    caractérisé en ce qu'un dispositif aux rayons X et/ou à ultra-son est prévu à localiser des concrétions, dont l'axe d'observation se coupe avec l'axe dudit générateur sonore ou s'étend le long de l'axe dudit générateur sonore.
  17. Dispositif selon la revendication 16,
    caractérisé en ce que l'axe d'observation dudit dispositif de localisattion peut être libréré par un mouvement desdits segments.
EP91920223A 1990-11-20 1991-11-20 Dispositif pour la generation d'ondes sonores acoustiques focalisees Expired - Lifetime EP0513279B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4036981 1990-11-20
DE4036981A DE4036981A1 (de) 1990-11-20 1990-11-20 Vorrichtung zur erzeugung von fokussierten akustischen schallwellen
PCT/EP1991/002188 WO1992008413A1 (fr) 1990-11-20 1991-11-20 Dispositif pour la generation d'ondes sonores acoustiques focalisees

Publications (2)

Publication Number Publication Date
EP0513279A1 EP0513279A1 (fr) 1992-11-19
EP0513279B1 true EP0513279B1 (fr) 1995-10-11

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ID=6418625

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Application Number Title Priority Date Filing Date
EP91920223A Expired - Lifetime EP0513279B1 (fr) 1990-11-20 1991-11-20 Dispositif pour la generation d'ondes sonores acoustiques focalisees

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EP (1) EP0513279B1 (fr)
AT (1) ATE128843T1 (fr)
DE (2) DE4036981A1 (fr)
WO (1) WO1992008413A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5595178A (en) * 1994-10-02 1997-01-21 Hmt High Medical Technologies Gmbh System, method and apparatus for treatment of degenerative bone
US7189209B1 (en) 1996-03-29 2007-03-13 Sanuwave, Inc. Method for using acoustic shock waves in the treatment of a diabetic foot ulcer or a pressure sore
US6368292B1 (en) 1997-02-12 2002-04-09 Healthtronics Inc. Method for using acoustic shock waves in the treatment of medical conditions
US6390995B1 (en) 1997-02-12 2002-05-21 Healthtronics Surgical Services, Inc. Method for using acoustic shock waves in the treatment of medical conditions
DE10301875B4 (de) * 2003-01-17 2004-11-18 Sws Shock Wave Systems Ag Vorrichtung zur Erzeugung von unterschiedlichen akustischen Druckwellen durch variable Reflexionsflächen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029395A (en) * 1975-10-31 1977-06-14 Westinghouse Electric Corporation Method for altering the focal zone of a lens system
DE3150513A1 (de) * 1981-12-21 1983-06-30 Battelle-Institut E.V., 6000 Frankfurt "vorrichtung zur lokalen hyperthermiebehandlung"
DE3501838A1 (de) * 1985-01-21 1986-07-24 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur erzeugung zeitlich versetzter stosswellen
DE3835318C1 (fr) * 1988-10-17 1990-06-28 Storz Medical Ag, Kreuzlingen, Ch
JP2602923B2 (ja) * 1988-10-31 1997-04-23 株式会社東芝 衝撃波治療装置
DE3932967A1 (de) * 1989-10-03 1991-04-11 Wolf Gmbh Richard Ultraschall-stosswellenwandler

Also Published As

Publication number Publication date
DE59106686D1 (de) 1995-11-16
DE4036981A1 (de) 1992-05-21
EP0513279A1 (fr) 1992-11-19
WO1992008413A1 (fr) 1992-05-29
ATE128843T1 (de) 1995-10-15

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