EP0256232B1 - Stosswellengenerator zum berührungslosen Zertrümmern von Konkrementen im Körper eines Lebenswesens - Google Patents

Stosswellengenerator zum berührungslosen Zertrümmern von Konkrementen im Körper eines Lebenswesens Download PDF

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Publication number
EP0256232B1
EP0256232B1 EP87108117A EP87108117A EP0256232B1 EP 0256232 B1 EP0256232 B1 EP 0256232B1 EP 87108117 A EP87108117 A EP 87108117A EP 87108117 A EP87108117 A EP 87108117A EP 0256232 B1 EP0256232 B1 EP 0256232B1
Authority
EP
European Patent Office
Prior art keywords
coil
membrane
shock wave
wave generator
layers
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
EP87108117A
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German (de)
English (en)
French (fr)
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EP0256232A1 (de
Inventor
Georg Dipl.-Ing. Köhler
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0256232A1 publication Critical patent/EP0256232A1/de
Application granted granted Critical
Publication of EP0256232B1 publication Critical patent/EP0256232B1/de
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Expired - Lifetime 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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated

Definitions

  • the invention relates to a shock wave generator for a device for contactless crushing of concrements in the body of a living being, which has a coil with spirally arranged turns and an opposite, a liquid-filled space, made of an electrically conductive material membrane, the coil can be connected to a high voltage supply.
  • shock wave generator with a membrane arranged parallel to the coil is described in DE-OS 33 12 014.
  • the shock waves are generated by connecting the coil to the high-voltage supply, which converts one to several kV, e.g. 20 kV, charged capacitor contains.
  • the energy stored in the capacitor then suddenly discharges into the coil, with the result that the coil builds up a magnetic field extremely quickly.
  • a current is induced in the membrane which is opposite to the current flowing in the coil and consequently generates an opposing magnetic field, under the effect of which the membrane is suddenly moved away from the coil.
  • the so in the with liquid, e.g. Water, filled space shock wave generated by suitable measures on the concrements located in the body of the living being, e.g. Kidney stones, focuses and causes their destruction.
  • the known shock wave generator To achieve the greatest possible conversion of the electrical energy given off by the high-voltage supply into impulse energy, it is necessary in the known shock wave generator to mount the membrane as close as possible to the coil. However, this is only possible to a limited extent because of the inevitable potential difference between the coil and the membrane, since a minimum distance must be maintained in order to avoid voltage flashovers between the membrane and the coil. Voltage flashovers would impair the effect of the shock wave generator and lead to damage to the membrane, which adversely affects its service life. In the case of the known shock wave generator, the distance between the membrane and the coil must therefore be chosen in the interest of a sufficient lifespan of the membrane so that only an unsatisfactory efficiency is achieved when converting the electrical energy into shock energy.
  • the invention has for its object to design a generic shock wave generator so that its membrane has a long service life without being associated with a significant reduction in the efficiency of energy conversion.
  • this object is achieved in that the coil consists of two cascaded, covering, lying in parallel areas, the direction of current and winding of the two layers of the coil are matched to each other in terms of strengthening their magnetic field, and that the Membrane the smaller potential difference layer of the coil of the membrane is arranged directly opposite.
  • the invention takes advantage of the fact that the high voltage drops across the coil, which in the case of a two-layer coil has the result that there is a maximum potential difference between at least one layer of the coil and the membrane, which is less than that for the same amount of High voltage between the membrane and a single-layer coil maximum potential difference.
  • the coil builds in due to the fact that its two layers are connected one behind the other and lying in a covering manner in parallel areas, the current and winding directions of the two layers being matched to one another in the sense of strengthening their magnetic field, with the same amount of high voltage and the same coil diameter stronger magnetic field than a single-layer coil, which induces larger eddy currents in the membrane and builds up a stronger magnetic opposing field, which ultimately results in the formation of stronger shock waves in the liquid-filled space.
  • the invention albeit partially or completely dispensing with an improved high-voltage strength - allows: to convert a larger electrical energy into impulse energy, or to realize shorter rise times of the shock wave with the same electrical energy, since that in the high-voltage supply located capacitor can be charged to a higher charging voltage than a shock wave generator with a single-layer coil.
  • the capacitor can either give off a larger energy, which increases with the square of the charging voltage, or its capacity can be reduced with the same available energy, as a result of which the resonant circuit formed by the coil and the capacitor has a higher natural frequency, which leads to a shorter rise time of the current flowing through the coil and thus to a shorter rise time of the shock wave, which is quite desirable when crushing concrements.
  • the two layers of the coil are wound in opposite directions, their innermost turns are connected to one another and their respective outermost turns are connected to the high-voltage supply. It is thus achieved that the coil can be produced in a simple manner and has a small thickness, since an otherwise required special connection between the two layers of the coil can be omitted. With regard to the manufacture of the coil, it is also particularly expedient if both layers of the coil have the same number of turns. According to one embodiment of the invention it is provided that the outermost turn of the position of the coil with the membrane directly opposite the membrane is at the same potential, the membrane being at earth potential according to a last variant of the invention. It is thus ensured that there is no high voltage on the liquid in the room, which may come into contact with the living being or the operating personnel.
  • the shock wave generator has a housing 1 which contains a space 3 filled with a liquid and closed off by a membrane 2. Opposite the membrane 2 formed from an electrically conductive material, a coil 4 with spirally arranged turns is provided, an insulating film 5 being arranged between the membrane 2 and the coil 4. The turns of the coil 4 are arranged on a support surface 6 of an insulator 7, which is accommodated in a cap 8. The membrane 2, the insulating film 5 and the cap 8 containing the insulator 7 with the coil 4 are fastened to the housing 1 by means of screws 9.
  • the space between the insulating film 5 and the support surface 6 of the insulator 7 is filled with an electrically insulating cast resin (not shown for the sake of clarity).
  • the coil 4 can be connected via connections 10 and 11, which come out through holes in the insulator 7 and the cap 8, by means of a suitable switching means 12 to a schematically illustrated high-voltage supply 13, which emits a current surge to the coil 4, as a result of which the membrane 2 is suddenly repelled by the coil 4, which leads to the formation of a shock wave in the liquid in the space 3.
  • a suitable switching means 12 to a schematically illustrated high-voltage supply 13 which emits a current surge to the coil 4, as a result of which the membrane 2 is suddenly repelled by the coil 4, which leads to the formation of a shock wave in the liquid in the space 3.
  • potential differences occur between the membrane 2 and the individual turns of the coil 4.
  • the coil 4 consists of two layers 14 and 15, which are arranged lying in parallel planes.
  • the two layers 14 and 15 of the coil 4 are wound in opposite directions and connected in series by connecting their innermost windings 16 and 17, so that the magnetic fields of both layers 14 and 15 of the coil 4 reinforce each other when they pass through their respective outermost windings 18 and 19 the high voltage supply 13 are connected.
  • the two layers 14 and 15 of the coil 4 have the same number of turns.
  • the outermost turn 18 of the layer 14 of the coil 4 which is directly adjacent to the membrane 2 is at the same potential as the membrane 2, namely earth potential 20. Accordingly, there is a smaller potential difference between the layer 14 of the coil 4 which is immediately adjacent to the membrane 2 than between the membrane 2 and the layer 15 of the coil 4 removed from this.
  • shock wave generator with a flat membrane 2 is shown. But it is also possible to use shock wave generators with different types, e.g. spherically shaped membrane according to the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Surgical Instruments (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP87108117A 1986-06-16 1987-06-04 Stosswellengenerator zum berührungslosen Zertrümmern von Konkrementen im Körper eines Lebenswesens Expired - Lifetime EP0256232B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3620189 1986-06-16
DE3620189 1986-06-16

Publications (2)

Publication Number Publication Date
EP0256232A1 EP0256232A1 (de) 1988-02-24
EP0256232B1 true EP0256232B1 (de) 1991-01-16

Family

ID=6303094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108117A Expired - Lifetime EP0256232B1 (de) 1986-06-16 1987-06-04 Stosswellengenerator zum berührungslosen Zertrümmern von Konkrementen im Körper eines Lebenswesens

Country Status (4)

Country Link
US (1) US4796608A (enrdf_load_stackoverflow)
EP (1) EP0256232B1 (enrdf_load_stackoverflow)
JP (1) JPS6368314U (enrdf_load_stackoverflow)
DE (1) DE3767405D1 (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3743822A1 (de) * 1987-12-23 1989-07-13 Dornier Medizintechnik Elektromagnetische stosswellenquelle
DE4130796A1 (de) * 1990-09-27 1992-04-02 Siemens Ag Elektrisch antreibbare stosswellenquelle
US5233972A (en) * 1990-09-27 1993-08-10 Siemens Aktiengesellschaft Shockwave source for acoustic shockwaves
DE4032357C1 (enrdf_load_stackoverflow) * 1990-10-12 1992-02-20 Dornier Medizintechnik Gmbh, 8000 Muenchen, De
DE4123160C1 (enrdf_load_stackoverflow) * 1991-07-12 1992-09-17 Siemens Ag, 8000 Muenchen, De
DE19702593C2 (de) * 1997-01-24 2000-07-06 Siemens Ag Verfahren und Vorrichtung zur Erzeugung von Stoßwellen für technische, vorzugsweise medizintechnische Anwendungen
US6312434B1 (en) 1999-04-14 2001-11-06 Northgate Technologies, Inc. Device for producing a shock wave to impact an object
US7251195B1 (en) 2003-10-23 2007-07-31 United States Of America As Represented By The Secretary Of The Army Apparatus for generating an acoustic signal
CN103536339B (zh) * 2013-11-01 2015-11-25 杜锡鑫 体外冲击波碎石机及用于体外冲击波碎石机的充放电电路
CN107595386B (zh) * 2017-10-31 2023-04-25 重庆京渝激光技术有限公司 激光治疗头

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648837A (en) * 1952-03-10 1953-08-11 Standard Oil Dev Co Pulsed sound system
DE3312014C2 (de) * 1983-04-02 1985-11-07 Wolfgang Prof. Dr. 7140 Ludwigsburg Eisenmenger Einrichtung zur berührungsfreien Zertrümmerung von Konkrementen im Körper von Lebewesen
DE3328051A1 (de) * 1983-08-03 1985-02-14 Siemens AG, 1000 Berlin und 8000 München Einrichtung zum beruehrungslosen zertruemmern von konkrementen
DE3443295A1 (de) * 1984-11-28 1986-06-05 Wolfgang Prof. Dr. 7140 Ludwigsburg Eisenmenger Einrichtung zur beruehrungsfreien zertruemmerung von konkrementen im koerper von lebewesen

Also Published As

Publication number Publication date
EP0256232A1 (de) 1988-02-24
US4796608A (en) 1989-01-10
JPS6368314U (enrdf_load_stackoverflow) 1988-05-09
DE3767405D1 (de) 1991-02-21

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