EP0111047A1 - Dispositif pour la production d'une suite d'ondes de choc - Google Patents

Dispositif pour la production d'une suite d'ondes de choc Download PDF

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Publication number
EP0111047A1
EP0111047A1 EP83106091A EP83106091A EP0111047A1 EP 0111047 A1 EP0111047 A1 EP 0111047A1 EP 83106091 A EP83106091 A EP 83106091A EP 83106091 A EP83106091 A EP 83106091A EP 0111047 A1 EP0111047 A1 EP 0111047A1
Authority
EP
European Patent Office
Prior art keywords
shock wave
layer
propagation medium
wave
reflector
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.)
Granted
Application number
EP83106091A
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German (de)
English (en)
Other versions
EP0111047B1 (fr
Inventor
Gerold Dr.Rer.Nat. Heine
Othmar Dr.Rer.Nat. Wess
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 System GmbH
Original Assignee
Dornier System 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 System GmbH filed Critical Dornier System GmbH
Publication of EP0111047A1 publication Critical patent/EP0111047A1/fr
Application granted granted Critical
Publication of EP0111047B1 publication Critical patent/EP0111047B1/fr
Expired legal-status Critical Current

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    • 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
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • 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 invention relates to a device for generating shock wave pulse sequences for contact-free comminution of concrements in bodies of living beings.
  • a device for the contact-free comminution of concrements in bodies of living beings by means of shock waves is known (DE-OS 23 51 247).
  • the shock waves are generated by a spark gap in a focal point of a liquid-filled hollow ellipsoid and focused by the ellipsoid surface on the second focal point, in which the concretion to be destroyed, for example a kidney stone, lies.
  • the shock waves load the concrement under pressure and tension and bring parts of the cone flaking.
  • the firing sequence frequency is limited by the charging time of the capacitors. Simultaneous processing of a concrement by two or more shock wave fronts is not possible with this device.
  • shock wave fronts In order for several shock wave fronts to act on a concrement almost simultaneously, these fronts must follow one another within 0.1 to 10 microseconds. Attempts have already been made to trigger double pulses by using two shock generators, but only a time interval of 20 milliseconds has been reached. At this point, the crack formation initiated by the first shock wave has already been completed.
  • the invention has for its object to provide a device for generating shock wave pulse sequences in which the shock wave fronts act on the concrement at such short time intervals that the concretion is still under the effect of the first wave front when the subsequent wave front interacts with the Concretion occurs, the slope, the pressure rise must not be reduced.
  • This object is achieved according to the invention by a device in which a layer of uniform thickness made of a material with an impedance unequal to that of the propagation medium is arranged in the propagation medium such that it is traversed by the entire shock wave field.
  • Embodiments of the invention are the subject of subclaims.
  • the solution according to the invention is based on the fact that a single pulse generated by the spark gap is multiplied by multiple reflections on the front and on the back of a layer with an impedance unequal to that of the propagation medium into a sequence of staggered shock wave fronts of the desired repetition frequency.
  • the interaction of different shock wave fronts in the same concretion results in interferences which locally increase the pressure amplitudes and tensile amplitudes and excitations of special resonance frequencies with an increased comminution effect.
  • the solution according to the invention also has the advantage that the energy introduced into the body of the living being does not increase in spite of the increased destruction. This prevents damage to the tissue traversed by the shock wave, and the concrements are nevertheless broken down into small fragments reliably and faster than before. Due to the higher shredding effect, fewer applications are necessary. The patient is relieved, the service life of the electrodes is increased.
  • F ig. 1 shows an inventive device for E rzeu- supply of shock wave pulse trains.
  • a spark gap 7 In the first focal point of the ellipsoid 5 there is a spark gap 7 which can produce a shock wave front by discharge.
  • the body 3 is positioned so that the concrement 4 is in the second focal point of the ellipsoid.
  • the reflector 5 is closed with a layer 8 according to the invention.
  • the layer has the interfaces 9 and 10 and is not drawn to scale in FIG. 1.
  • the thickness of real layers is in the mm range.
  • An underwater discharge is ignited at the spark gap 7 in order to crush the concrement 4. This creates a shock wave front, which spreads in the reflector 5 and is guided from the reflector walls to the concretion 4.
  • a wave normal with the amplitude P E is shown .
  • the transmitted wave P is likewise split into a transmitted wave P TT and a reflected wave P TR if the wave fronts are at the rear Reach interface 10 of layer 8.
  • the amplitudes are again to be calculated analogously to the formulas mentioned above.
  • the wave P TT continues in the original direction
  • the wave P TR runs back in the layer 8 and suffers a new reflection at the front interface 9 (with the corresponding amplitude weakening).
  • a corresponding fraction of this wave emerges from the rear boundary surface 10 and follows the first transmitted Wave P TT at a time interval ⁇ t.
  • ⁇ t is the time required to run through the layer thickness d twice:
  • the parameters can be selected by selecting suitable materials , c and d are largely free to determine the desired pulse repetition frequencies (with a fixed choice of material depending on the thickness of layer 8) and amplitude ratios (depending on the size of the impedance jump z 8 - z 6 and layer thickness d) within wide limits.
  • a layer with a suitable thickness can, for example, be made of aluminum, V2A steel, titanium, lead or the like. Materials or alloys made from them and also from suitable non-metals, ceramics or plastics. Liquids may also be suitable, provided that they can be held in the appropriate shape by pillows, for example.
  • F ig. 2 shows an arrangement with a reflector 5a, in which the layer 8a is designed like a zone plate. It is only traversed by fractions of the shock wave field.
  • the second (third etc.) pulse of the shock wave sequence has the greatest amplitude.
  • the primary wave can come with a time delay compared to the wave that runs through the plate.
  • FIG. 3 shows an arrangement in which the layer 8b according to the invention is arranged concentrically to the shock wave focus 11 in the form of a spherical shell. All parts of the shock wave field run perpendicular to the layer surface. The reflection conditions and the time offset ⁇ t of the wave fronts are thus constant for all parts of the wave field.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Surgical Instruments (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP83106091A 1982-11-04 1983-06-22 Dispositif pour la production d'une suite d'ondes de choc Expired EP0111047B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3240691A DE3240691C1 (de) 1982-11-04 1982-11-04 Vorrichtung zur Erzeugung von Stosswellenimpulsfolgen
DE3240691 1982-11-04

Publications (2)

Publication Number Publication Date
EP0111047A1 true EP0111047A1 (fr) 1984-06-20
EP0111047B1 EP0111047B1 (fr) 1986-12-03

Family

ID=6177261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106091A Expired EP0111047B1 (fr) 1982-11-04 1983-06-22 Dispositif pour la production d'une suite d'ondes de choc

Country Status (4)

Country Link
US (1) US4721108A (fr)
EP (1) EP0111047B1 (fr)
JP (1) JPS5982978A (fr)
DE (2) DE3240691C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU580895B2 (en) * 1985-10-17 1989-02-02 Yachiyoda Kogyo Co. Ltd. Shock wave generating apparatus

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5143073A (en) 1983-12-14 1992-09-01 Edap International, S.A. Wave apparatus system
USRE33590E (en) 1983-12-14 1991-05-21 Edap International, S.A. Method for examining, localizing and treating with ultrasound
DE3429487A1 (de) * 1984-08-10 1986-02-20 Richard Wolf Gmbh, 7134 Knittlingen Geraet zur erzeugung der wechselspannung fuer den wandler einer lithotripsie-sonde
DE3702120A1 (de) * 1987-01-24 1988-08-04 Dornier Medizintechnik Schmerzfreie zerkleinerung von konkrementen
DE8710118U1 (de) * 1987-07-23 1988-11-17 Siemens AG, 1000 Berlin und 8000 München Stoßwellengenerator für eine Einrichtung zum berührungslosen Zertrümmern von Konkrementen im Körper eines Lebewesens
EP0324948A3 (fr) * 1988-01-21 1989-10-25 Dornier Medizintechnik Gmbh Dispositif de réduction pour concrétions
US5065761A (en) * 1989-07-12 1991-11-19 Diasonics, Inc. Lithotripsy system
DE9109025U1 (de) * 1990-08-02 1991-12-05 Siemens AG, 80333 München Generator zur Erzeugung akustischer Zugimpulse
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
DE10158519B4 (de) * 2001-11-29 2005-01-13 Dornier Medtech Holding International Gmbh Stoß- und Druckwellen-Therapiegerät
US20030199857A1 (en) * 2002-04-17 2003-10-23 Dornier Medtech Systems Gmbh Apparatus and method for manipulating acoustic pulses
US7311677B1 (en) * 2002-06-26 2007-12-25 Fields John G Energy concentrator system and method
DE10234144A1 (de) * 2002-07-26 2004-02-05 Dornier Medtech Gmbh Lithotripter
JP4804906B2 (ja) * 2004-12-15 2011-11-02 ドルニエル メドテック システムズ ゲーエムベーハー 循環器および神経疾患の患者における細胞治療および組織再生の衝撃波による改良方法
DE102005037043C5 (de) * 2005-08-05 2017-12-14 Dornier Medtech Systems Gmbh Stoßwellentherapiegerät mit Bildgewinnung
DE102006002273A1 (de) * 2006-01-17 2007-07-26 Dornier Medtech Systems Gmbh Behandlungseinrichtung
FR2991807B1 (fr) * 2012-06-06 2014-08-29 Centre Nat Rech Scient Dispositif et procede de focalisation d'impulsions
EP4052665A1 (fr) * 2021-03-04 2022-09-07 Storz Medical AG Diffuseur pour transducteur d'onde de choc

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2351247A1 (de) * 1973-10-12 1975-04-24 Dornier System Gmbh Einrichtung zum beruehrungsfreien zertruemmern von im koerper von lebewesen befindlichen konkrementen
DE2913251A1 (de) * 1979-04-03 1980-10-23 Wolf Gmbh Richard Vorrichtung zur zertruemmerung von nierensteinen o.dgl.
EP0081639A1 (fr) * 1981-11-25 1983-06-22 DORNIER SYSTEM GmbH Dispositif pour la couplage et découplage sans léser des ondes de choc à des fins thérapeutiques

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559227A (en) * 1947-05-24 1951-07-03 Interval Instr Inc Shock wave generator
DE2508494A1 (de) * 1975-02-27 1976-09-02 Hansrichard Dipl Phys D Schulz Anordnung zum fokussieren von elektromagnetischen oder mechanischen wellen
DE2650624C2 (de) * 1976-11-05 1985-05-30 Dornier System Gmbh, 7990 Friedrichshafen Einrichtung zum Zertrümmern von im Körper eines Lebewesens befindlichen Konkrementen
JPS5540257A (en) * 1978-09-13 1980-03-21 Takehiro Nishi Windmill improve dynamic lift by means of guide vane
DE2921444B2 (de) * 1979-05-26 1981-04-23 Richard Wolf Gmbh, 7134 Knittlingen Vorrichtung zur berührungslosen Zertrümmerung von Nierensteinen o.dgl.
US4311147A (en) * 1979-05-26 1982-01-19 Richard Wolf Gmbh Apparatus for contact-free disintegration of kidney stones or other calculi

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2351247A1 (de) * 1973-10-12 1975-04-24 Dornier System Gmbh Einrichtung zum beruehrungsfreien zertruemmern von im koerper von lebewesen befindlichen konkrementen
DE2913251A1 (de) * 1979-04-03 1980-10-23 Wolf Gmbh Richard Vorrichtung zur zertruemmerung von nierensteinen o.dgl.
EP0081639A1 (fr) * 1981-11-25 1983-06-22 DORNIER SYSTEM GmbH Dispositif pour la couplage et découplage sans léser des ondes de choc à des fins thérapeutiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ULTRASONICS SYMPOSIUM PROCEEDINGS, New Jersey, 25.-27. September 1978, Seiten 122-125, IEEE, New York, USA *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU580895B2 (en) * 1985-10-17 1989-02-02 Yachiyoda Kogyo Co. Ltd. Shock wave generating apparatus

Also Published As

Publication number Publication date
DE3368008D1 (en) 1987-01-15
JPS5982978A (ja) 1984-05-14
JPH0553497B2 (fr) 1993-08-10
EP0111047B1 (fr) 1986-12-03
DE3240691C1 (de) 1987-12-23
US4721108A (en) 1988-01-26

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