EP0111047B1 - Vorrichtung zur Erzeugung von Stosswellenimpulsfolgen - Google Patents

Vorrichtung zur Erzeugung von Stosswellenimpulsfolgen Download PDF

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Publication number
EP0111047B1
EP0111047B1 EP83106091A EP83106091A EP0111047B1 EP 0111047 B1 EP0111047 B1 EP 0111047B1 EP 83106091 A EP83106091 A EP 83106091A EP 83106091 A EP83106091 A EP 83106091A EP 0111047 B1 EP0111047 B1 EP 0111047B1
Authority
EP
European Patent Office
Prior art keywords
layer
shockwave
concretion
shock wave
wave
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
Application number
EP83106091A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0111047A1 (de
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/de
Application granted granted Critical
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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 the contact-free comminution of concrements in bodies of living beings according to the preamble of claim 1.
  • Such a device is known from DE-A-2 913 251.
  • 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 concrement to be destroyed, e.g. B. a kidney stone.
  • the shock waves load the concrement under pressure and tension and cause parts of the concrement to flake off.
  • 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 to allow 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 of the pressure rise must not be reduced.
  • This object is achieved according to the invention by a device in which the thickness of the layer is dimensioned such that a pulse generated by a shock wave source is multiplied by multiple reflection at the front and rear of the layer in a sequence of densely staggered shock wave fronts, which the one mentioned in the task Have property.
  • 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 in a sequence of densely staggered shock wave fronts of the desired repetition frequency.
  • 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.
  • Fig. 1 shows an inventive device for generating shock wave pulse trains.
  • a tub 1 (only partially drawn), which is filled with a liquid 2, there is a body 3 with a concretion 4, for. B. a kidney stone.
  • a reflector 5 which is filled with a coupling liquid 6 (for example water), is attached to the tub 1.
  • 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 T also experiences a splitting into a transmitted wave P ⁇ and a reflected wave P TR when the wave fronts reach the rear interface 10 of the layer 8.
  • the amplitudes are again to be calculated analogously to the formulas mentioned above. While 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 - At is the time required for passing through the layer thickness d twice:
  • a layer of suitable thickness can e.g. B. from aluminum, V2A steel, titanium, lead or similar materials or alloys thereof and also from suitable non-metals, ceramics or plastics. Liquids may also be suitable, provided they are e.g. B. can be held in the appropriate shape by pillows.
  • FIG. 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 shock wave components which do not pass through the layer 8a, reach the concretion without weakening and at a point in time denoted by t o ; the remaining shock wave components undergo multiple reflection and the first pulse of the pulse sequence reaches the concretion at the time
  • 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 At of the wave fronts is constant for all parts of the wave field. In addition, the focus remains unaffected.

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 Vorrichtung zur Erzeugung von Stosswellenimpulsfolgen Expired EP0111047B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6177261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106091A Expired EP0111047B1 (de) 1982-11-04 1983-06-22 Vorrichtung zur Erzeugung von Stosswellenimpulsfolgen

Country Status (4)

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

Families Citing this family (19)

* 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
JPS6232008Y2 (enrdf_load_stackoverflow) * 1985-10-17 1987-08-17
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 (de) * 1988-01-21 1989-10-25 Dornier Medizintechnik Gmbh Vorrichtung zur Steinzerkleinerung
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 (en) 2021-03-04 2022-09-07 Storz Medical AG Diffuser for a shockwave transducer

Family Cites Families (8)

* 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
DE2913251C2 (de) * 1979-04-03 1985-08-01 Richard Wolf Gmbh, 7134 Knittlingen Vorrichtung zur berührungsfreien Zertrümmerung von Steinen in Körperhöhlen
US4311147A (en) * 1979-05-26 1982-01-19 Richard Wolf Gmbh Apparatus for contact-free disintegration of kidney stones or other calculi
DE2921444B2 (de) * 1979-05-26 1981-04-23 Richard Wolf Gmbh, 7134 Knittlingen Vorrichtung zur berührungslosen Zertrümmerung von Nierensteinen o.dgl.
DE3146626C2 (de) * 1981-11-25 1985-10-10 Dornier System Gmbh, 7990 Friedrichshafen Vorrichtung zum Zerstören von im Körper eines Lebewesens befindlichen Konkrementen

Also Published As

Publication number Publication date
EP0111047A1 (de) 1984-06-20
JPH0553497B2 (enrdf_load_stackoverflow) 1993-08-10
DE3240691C1 (de) 1987-12-23
US4721108A (en) 1988-01-26
JPS5982978A (ja) 1984-05-14
DE3368008D1 (en) 1987-01-15

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