EP0362529A1 - Kombinierte Stosswellenquelle - Google Patents

Kombinierte Stosswellenquelle Download PDF

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Publication number
EP0362529A1
EP0362529A1 EP89115234A EP89115234A EP0362529A1 EP 0362529 A1 EP0362529 A1 EP 0362529A1 EP 89115234 A EP89115234 A EP 89115234A EP 89115234 A EP89115234 A EP 89115234A EP 0362529 A1 EP0362529 A1 EP 0362529A1
Authority
EP
European Patent Office
Prior art keywords
shock wave
wave source
imaging system
shock
flat
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Withdrawn
Application number
EP89115234A
Other languages
German (de)
English (en)
French (fr)
Inventor
Michael Dr.rer.nat. Dipl.-Phys. Grünewald
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.)
Dornier Medizintechnik GmbH
Original Assignee
Dornier Medizintechnik 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 Dornier Medizintechnik GmbH filed Critical Dornier Medizintechnik GmbH
Publication of EP0362529A1 publication Critical patent/EP0362529A1/de
Withdrawn legal-status Critical Current

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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
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/04—Sound-producing devices
    • G10K15/043—Sound-producing devices producing shock waves

Definitions

  • the invention relates to a device for generating focused shock waves according to the preamble of claim 1.
  • Shock waves are understood here as weaker pressure pulses, the intensity of which is sufficient to cause changes in the bodies of living beings, such as e.g. Movement of stones or heating of tissue.
  • a lithotripter with an area source is known. This is either designed as a self-focusing spherical cap or flat. Imaging systems such as reflectors, lenses or electrical controls of the different zones of the shock wave source are then required for focusing.
  • a lithotripter with two shock wave sources is known from German utility model 88 02 995.
  • shock waves are generated extracorporeally and passed through the skin to the stone; on the other hand, the shock waves are generated at the end of a light guide near the stone.
  • the object of the invention is to propose a flexible and versatile shock wave source, in particular for lithotripsy, which combines the positive properties of the individual shock wave sources known per se, such as high flexibility and high shattering power.
  • the essence of the invention is the dual use of the imaging system by shock waves that come from two different sources.
  • the second shock wave source is a flat, circular oscillator (e.g. a disk covered with piezoceramic elements).
  • the imaging system is a rotationally symmetrical body with a flat back and a curved front. This body is designed so that it acts as a reflector for the point source and for the surface shock wave source together with the medium in the reflector as a lens, so that with suitable dimensioning and choice of material both sources have a common object-side focus.
  • the second shock wave source and the imaging body are preferably rotationally symmetrical, in particular the body has an ellipsoidal front surface.
  • the first shock wave source is preferably located in the Axis of symmetry of the two aforementioned components.
  • a common focal point and ideal geometric imaging properties are present if ellipsoid eccentricity and refractive index on the object side match.
  • the latter condition determines the selection of suitable materials and the geometric shape.
  • the imaging system exists - e.g. when the reflector is filled with water - preferably from a metallic material with which the double effect (lens and reflector) can be achieved.
  • the imaging system is flush with the flat shock wave (e.g. the piezoceramic transducer or the transducer), which can be achieved by gluing or friction welding.
  • the flat shock wave e.g. the piezoceramic transducer or the transducer
  • the first shock wave source the electrode
  • the ellipsoid of revolution formed by the front surface of the imaging body can be closed off for use with a water cushion for coupling to the patient's body.
  • the flat transducer can be segmented. This segmentation can e.g. in a piezoceramic transducer consist of individual elements (mosaic-like design) to protect the transducer from destruction by high-voltage pulses.
  • the mechanical termination of the piezoelectric oscillator is selected so that acoustic pulses (shock waves) with the widest possible band are generated.
  • the flat transducer can also have a dynamic focus. This can be done in the segmented Execution can be achieved in that the individual elements are controlled radially offset in time. This makes it possible to achieve different foci of the two shock wave systems, to vary the focus or, in the case of non-ideal focusing, to compensate for the error by means of electronic control by means of the ellipsoid of rotation.
  • the planar transducer can also be curved itself. This is advantageous, for example, if the ellipsoid eccentricity and the refractive index of the lens on the object side are different, so that one or the other shock wave system results in a non-ideal focusing, which is corrected without electronic aids.
  • the shape of the transducer should be either concave or convex, depending on whether the eccentricity is greater or less than the refractive index.
  • the imaging body can also have such curvatures that different foci can be reached. This always occurs when the eccentricity and the refractive index are different. This can be used to advantage if different focal lengths are required in the application, which can be due to different stone positions or patient sizes.
  • the invention is illustrated by a figure.
  • the figure shows a device for crushing stones in the body of a patient P.
  • the device is arranged opposite the patient's body such that the second focal point (F2) coincides with the location of the stone in the patient P.
  • the device contains a first shock wave source, here the electrode E, whose spark, which generates a shock wave, lies in the focal point F1 of an imaging body K.
  • the body K has a rotationally elliptical symmetry and guides all shock waves generated in its focal point F1 into the second focal point by reflection on its front side. This is indicated by the wave normal N1 in the figure.
  • the device contains a second shock wave source, here the piezoceramic vibrator S. This shock wave source is here rotationally symmetrical and flat.
  • shock waves generated by the vibrator S pass through the imaging body K, whose front interface here deflects the shock waves to the focal point F2.
  • An exemplary shock wave is represented by the normal N2.
  • the components of the electrical current and voltage supply for the two shock wave sources E and S are not shown, it being possible for one or both of the sources to also be strong ultrasound transmitters.
  • shock wave sources are also not shown.
  • the shape of the shock wave sources corresponds to the back of the imaging body.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Surgical Instruments (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
EP89115234A 1988-10-05 1989-08-18 Kombinierte Stosswellenquelle Withdrawn EP0362529A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883833862 DE3833862A1 (de) 1988-10-05 1988-10-05 Kombinierte stosswellenquelle
DE3833862 1988-10-05

Publications (1)

Publication Number Publication Date
EP0362529A1 true EP0362529A1 (de) 1990-04-11

Family

ID=6364426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115234A Withdrawn EP0362529A1 (de) 1988-10-05 1989-08-18 Kombinierte Stosswellenquelle

Country Status (3)

Country Link
EP (1) EP0362529A1 (xx)
JP (1) JPH02174839A (xx)
DE (1) DE3833862A1 (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5159917A (en) * 1991-12-03 1992-11-03 Meco Corporation Portable barbecue cooking grill
US5224468A (en) * 1990-04-05 1993-07-06 Dornier Medizintechnik Gmbh Combination shock wave source
US5458652A (en) * 1992-09-28 1995-10-17 Hmt High Medical Technologies Entwicklungs-Und Vertriebs Ag Device for generating shock waves for non contact disintegration of calculi

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2973685B1 (fr) * 2011-04-05 2014-11-28 Eye Tech Care Dispositif de therapie oculaire par ultrasons a reflecteur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2247195A1 (xx) * 1973-10-12 1975-05-09 Dornier System Gmbh
DE3119295A1 (de) * 1981-05-14 1982-12-16 Siemens AG, 1000 Berlin und 8000 München Einrichtung zum zerstoeren von konkrementen in koerperhoehlen
DE3617032A1 (de) * 1985-05-24 1987-01-08 Elscint Ltd Ultraschallgeraet zum orten von steinbildungen
EP0229981A1 (de) * 1985-12-20 1987-07-29 Siemens Aktiengesellschaft Verfahren zur Kontrolle der Eigenschaften des Fokus eines Ultraschallfeldes und Vorrichtung zur Durchführung des Verfahrens
EP0277489A2 (de) * 1987-01-26 1988-08-10 Siemens Aktiengesellschaft Lithotripsie-Arbeitsplatz

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3543867C3 (de) * 1985-12-12 1994-10-06 Wolf Gmbh Richard Vorrichtung zur räumlichen Ortung und zur Zerstörung von Konkrementen in Körperhöhlen
DE8802995U1 (de) * 1988-03-05 1988-05-05 Dornier Medizintechnik GmbH, 8034 Germering Mehrzweck-Lithotripter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2247195A1 (xx) * 1973-10-12 1975-05-09 Dornier System Gmbh
DE3119295A1 (de) * 1981-05-14 1982-12-16 Siemens AG, 1000 Berlin und 8000 München Einrichtung zum zerstoeren von konkrementen in koerperhoehlen
DE3617032A1 (de) * 1985-05-24 1987-01-08 Elscint Ltd Ultraschallgeraet zum orten von steinbildungen
EP0229981A1 (de) * 1985-12-20 1987-07-29 Siemens Aktiengesellschaft Verfahren zur Kontrolle der Eigenschaften des Fokus eines Ultraschallfeldes und Vorrichtung zur Durchführung des Verfahrens
EP0277489A2 (de) * 1987-01-26 1988-08-10 Siemens Aktiengesellschaft Lithotripsie-Arbeitsplatz

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5224468A (en) * 1990-04-05 1993-07-06 Dornier Medizintechnik Gmbh Combination shock wave source
US5159917A (en) * 1991-12-03 1992-11-03 Meco Corporation Portable barbecue cooking grill
US5458652A (en) * 1992-09-28 1995-10-17 Hmt High Medical Technologies Entwicklungs-Und Vertriebs Ag Device for generating shock waves for non contact disintegration of calculi

Also Published As

Publication number Publication date
DE3833862A1 (de) 1990-04-19
DE3833862C2 (xx) 1990-09-06
JPH02174839A (ja) 1990-07-06

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