EP0253053A1 - Shock-wave generator for a device for non-contacting desintegration of concretions in a living body - Google Patents

Shock-wave generator for a device for non-contacting desintegration of concretions in a living body Download PDF

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Publication number
EP0253053A1
EP0253053A1 EP87101803A EP87101803A EP0253053A1 EP 0253053 A1 EP0253053 A1 EP 0253053A1 EP 87101803 A EP87101803 A EP 87101803A EP 87101803 A EP87101803 A EP 87101803A EP 0253053 A1 EP0253053 A1 EP 0253053A1
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Prior art keywords
membrane
coil
wave generator
shock wave
shock
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EP87101803A
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German (de)
French (fr)
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EP0253053B1 (en
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Sylvester Dipl.-Ing. Oppelt (Fh)
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Siemens AG
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Siemens AG
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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

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  • the invention relates to a shock wave generator for a device for contactlessly crushing concrements in the body of a living being, which has a membrane that closes off a space filled with a liquid and is formed from an electrically conductive material, and a coil whose windings are arranged in a surface opposite the membrane , wherein the coil can be connected to a high-voltage supply by means of two connections.
  • shock wave generator with a membrane arranged parallel to the coil is described in DE-OS 33 28 051.
  • 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 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 is at such a potential that there is a positive potential difference between one connection of the coil and the membrane and a negative potential difference between the other connection of the coil and the membrane.
  • the potential difference that can occur at most between the turns of the coil and the membrane is less than the magnitude of the high voltage.
  • the coil can be used without the risk of voltage flashovers the membrane and the coil are arranged closer to the membrane, so that the shock wave generator according to the invention has a higher efficiency than the known shock wave generator with the same high voltage strength in converting the electrical energy into shock energy.
  • the coil is arranged in a surface running parallel to the membrane, it is advantageous if, according to a variant of the invention, the magnitude of the potential differences between the membrane and the connections of the coil are the same, since they are then between the membrane and the coil maximum potential difference corresponds to only half the amount of high voltage.
  • the membrane is at earth potential. 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 capacitor in the high voltage supply can be charged to a higher charging voltage than the known shock wave generator.
  • 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 leads to a shorter rise time of the shock wave, which is quite desirable when crushing concrements.
  • 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 provided with an elec trically insulating cast resin filled.
  • the coil 4 can be connected via connections 10 and 11, which emerge through bores 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, thereby causing 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, thereby causing 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 membrane 2 is at ground potential 14, while the terminal 11 is at a positive potential + U and the terminal 10 is at a negative potential -U. There is therefore a positive potential difference between the connection 11 of the coil 4 and the membrane 2. In contrast, there is a negative potential difference between the terminal 10 of the coil 4 and the membrane. Because of the fact that the potentials + U and -U, based on the earth potential 14, differ only in their signs, their magnitude is the same.
  • the turns of the coil 4 are at a constant distance from the membrane 2, there occurs at most a potential difference between the turns of the coil 4 and the membrane 2 which corresponds to half the amount of the high voltage supplied by the high voltage supply 13 .
  • the coil 4 can thus be attached closer to the membrane 2 in the shock wave generator according to the invention without the risk of Flashover arises.
  • 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.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Surgical Instruments (AREA)

Abstract

Die Erfindung betrifft einen Stoßwellengenerator, der eine einen mit einer Flüssigkeit gefüllten Raum (3) abschliessende, aus einem elektrisch leitenden Werkstoff gebildete Membran (2) und eine Spule (4) aufweist, deren Windungen in einer der Membran (2) gegenüberliegenden Fläche (6) angeordnet sind, wobei die Spule (4) mittels zweier Anschlüsse (10, 11) an eine Hochspannungsversorgung (13) anschließbar ist. Um eine hohe Lebensdauer der Membran (2) ohne nennenswerte Minderung des bei der Wandlung von elektrischer Energie in Stoßenergie vorliegenden Wirkungsgrades sicherzustellen, liegt die Membran (2) auf einem solchen Potential (14), daß zwischen einem Anschluß (11) der Spule (4) und der Membran (2) eine positive und zwischen dem anderen Anschluß (10) der Spule (4) und der Membran (2) eine negative Potentialdifferenz vorliegt.The invention relates to a shock wave generator which has a membrane (2) which closes off a space (3) filled with a liquid and is made of an electrically conductive material, and a coil (4), the windings of which in a surface (6) opposite the membrane (2) ) are arranged, the coil (4) being connectable to a high-voltage supply (13) by means of two connections (10, 11). In order to ensure a long service life of the membrane (2) without any appreciable reduction in the efficiency present when converting electrical energy into impact energy, the membrane (2) is at such a potential (14) that between a connection (11) of the coil (4 ) and the membrane (2) has a positive and between the other connection (10) of the coil (4) and the membrane (2) there is a negative potential difference.

Description

Die Erfindung betrifft einen Stoßwellengenerator für eine Einrichtung zum berührungslosen Zertrümmern von Konkre­menten im Körper eines Lebewesens, welcher eine einen mit einer Flüssigkeit gefüllten Raum abschließende, aus einem elektrisch leitenden Werkstoff gebildete Membran und eine Spule aufweist, deren Windungen in einer der Membran ge­genüberliegenden Fläche angeordnet sind, wobei die Spule mittels zweier Anschlüsse an eine Hochspannungsversorgung anschließbar ist.The invention relates to a shock wave generator for a device for contactlessly crushing concrements in the body of a living being, which has a membrane that closes off a space filled with a liquid and is formed from an electrically conductive material, and a coil whose windings are arranged in a surface opposite the membrane , wherein the coil can be connected to a high-voltage supply by means of two connections.

Ein solcher Stoßwellengenerator mit einer parallel zu der Spule angeordneten Membran ist in der DE-OS 33 28 051 be­schrieben. Dabei werden die Stoßwellen dadurch erzeugt, daß die Spule an die Hochspannungsversorgung angeschlos­sen wird, die einen auf mehrere kV, z.B. 20 kV, aufge­ladenen Kondensator enthält. Die in dem Kondensator ge­speicherte Energie entlädt sich dann schlagartig in die Spule, was zur Folge hat, daß die Spule äußerst schnell ein magnetisches Feld aufbaut. Gleichzeitig wird in der Membran ein Strom induziert, der dem in der Spule flies­senden Strom entgegengesetzt ist und demzufolge ein ma­gnetisches Gegenfeld erzeugt, unter dessen Wirkung die Membran schlagartig von der Spule wegbewegt wird. Die so in dem mit Flüssigkeit, z.B. Wasser, gefüllten Raum er­zeugte Stoßwelle wird durch geeignete Maßnahmen auf die im Körper des Lebewesens befindlichen Konkremente, z.B. Nierensteine, fokussiert und bewirkt deren Zertrümmerung.Such a shock wave generator with a membrane arranged parallel to the coil is described in DE-OS 33 28 051. 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. At the same time, 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.

Um eine möglichst weitgehende Wandlung der von der Hoch­ spannungsversorgung abgegebenen elektrischen Energie in Stoßenergie zu erreichen, ist es bei dem bekannten Stoß­wellengenerator erforderlich, die Membran möglichst nahe an der Spule anzubringen. Dies ist jedoch wegen der zwi­schen der Spule und der Membran zwangsläufig vorliegenden Potentialdifferenz, die wegen des Umstandes, daß die Mem­bran gemeinsam mit einem Anschluß der Spule und einem Pol der Hochspannungsversorgung auf Erdpotential liegt, dem Betrag der Hochspannung entspricht, nur bedingt möglich, da zur Vermeidung von Spannungsüberschlägen zwischen Mem­bran und Spule ein Mindestabstand eingehalten werden muß. Spannungsüberschläge würden die Wirkung des Stoßwellenge­nerators beeinträchtigen und zu Beschädigungen der Mem­bran führen, die deren Lebensdauer nachteilig beeinflus­sen. Bei dem bekannten Stoßwellengenerator muß daher im Interesse einer ausreichenden Lebensdauer der Membran der Abstand zwischen der Membran und der Spule so gewählt werden, daß sich bei der Wandlung der elektrischen Ener­gie in Stoßenergie nur ein unbefriedigender Wirkungsgrad einstellt.To achieve the greatest possible change from the high In order to achieve the electrical power output in impulse energy, it is necessary in the known shock wave generator to attach the membrane as close as possible to the coil. However, this is due to the inevitably present between the coil and the membrane potential difference, which corresponds to the amount of high voltage due to the fact that the membrane together with a connection of the coil and a pole of the high-voltage supply corresponds to the amount of high voltage, because for To avoid flashovers between the membrane and the coil, a minimum distance must be maintained. 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.

Der Erfindung liegt die Aufgabe zugrunde, einen gattungs­gemäßen Stoßwellengenerator so auszubilden, daß dessen Membran eine hohe Lebensdauer aufweist, ohne daß damit eine nennenswerte Minderung des Wirkungsgrades der Ener­giewandlung verbunden ist.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.

Nach der Erfindung wird diese Aufgabe dadurch gelöst, daß die Spule auf einem solchen Potential liegt, daß zwischen einem Anschluß der Spule und der Membran eine positive und zwischen dem anderen Anschluß der Spule und der Mem­bran eine negative Potentialdifferenz vorliegt. Bei dem erfindungsgemäßen Stoßwellengenerator ist somit die Po­tentialdifferenz, die zwischen den Windungen der Spule und der Membran höchstens auftreten kann, geringer als der Betrag der Hochspannung. Demzufolge kann die Spule, ohne daß die Gefahr von Spannungsüberschlägen zwischen der Membran und der Spule besteht, näher bei der Membran angeordnet werden, so daß der erfindungsgemäße Stoßwel­lengenerator bei gleicher Hochspannungsfestigkeit bei der Wandlung der elektrischen Energie in Stoßenergie einen höheren Wirkungsgrad als der bekannte Stoßwellengenerator aufweist.According to the invention, this object is achieved in that the coil is at such a potential that there is a positive potential difference between one connection of the coil and the membrane and a negative potential difference between the other connection of the coil and the membrane. In the shock wave generator according to the invention, the potential difference that can occur at most between the turns of the coil and the membrane is less than the magnitude of the high voltage. As a result, the coil can be used without the risk of voltage flashovers the membrane and the coil are arranged closer to the membrane, so that the shock wave generator according to the invention has a higher efficiency than the known shock wave generator with the same high voltage strength in converting the electrical energy into shock energy.

Optimale Verhältnisse liegen vor, wenn die Spule relativ zur Membran so angeordnet ist, daß die zwischen den ein­zelnen Windungen der Spule und der Membran vorliegenden Potentialdifferenzen ihrem Betrag nach an keiner Stelle den Betrag der größeren zwischen den Anschlüssen der Spu­le und der Membran vorliegenden Potentialdifferenz über­schreiten. Dabei wird davon ausgegangen, daß die Span­nungsabfälle über den Anschlüssen der Spule vernachläs­sigbar sind, d.h., daß die zwischen den den Anschlüssen unmittelbar benachbarten Windungen der Spule und der Mem­bran vorliegenden Potentialdifferenzen denen zwischen den Anschlüssen und der Membran entsprechen.Optimal conditions exist when the coil is arranged relative to the membrane in such a way that the magnitude of the potential differences between the individual turns of the coil and the membrane never exceed the magnitude of the larger potential difference between the connections of the coil and the membrane. It is assumed that the voltage drops across the connections of the coil are negligible, i.e. that the potential differences between the turns of the coil and the membrane immediately adjacent to the connections correspond to those between the connections and the membrane.

Insbesondere dann, wenn die Spule in einer parallel zur Membran verlaufenden Fläche angeordnet ist, ist es vor­teilhaft, wenn nach einer Variante der Erfindung die zwi­schen der Membran und den Anschlüssen der Spule jeweils vorliegenden Potentialdifferenzen ihrem Betrag nach gleich sind, da die dann zwischen der Membran und der Spule maximal auftretende Potentialdifferenz nur dem halben Betrag der Hochspannung entspricht.In particular, if the coil is arranged in a surface running parallel to the membrane, it is advantageous if, according to a variant of the invention, the magnitude of the potential differences between the membrane and the connections of the coil are the same, since they are then between the membrane and the coil maximum potential difference corresponds to only half the amount of high voltage.

Nach einer weiteren Variante der Erfindung liegt die Mem­bran auf Erdpotential. Es ist so sichergestellt, daß an der in dem Raum befindlichen Flüssigkeit, die unter Um­ständen mit dem Lebewesen bzw. dem Bedienungspersonal in Berührung kommen kann, keine Hochspannung anliegt.According to a further variant of the invention, the membrane is at earth potential. 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.

Es sei erwähnt, daß es die Erfindung - allerdings unter teilweisem oder vollständigem Verzicht auf eine verbes­ serte Hochspannungsfestigkeit - erlaubt, eine größere elektrische Energie in Stoßenergie umzuwandeln, bzw. bei gleicher elektrischer Energie geringere Anstiegszeiten der Stoßwelle zu realisieren, da der in der Hochspan­nungsversorgung befindliche Kondensator auf eine gegen­über dem bekannten Stoßwellengenerator höhere Ladespan­nung aufgeladen werden kann. Somit kann der Kondensator entweder eine größere, mit dem Quadrat der Ladespannung wachsende Energie abgeben oder seine Kapazität kann bei gleicher zur Verfügung stehender Energie verkleinert wer­den, wodurch der durch die Spule und den Kondensator ge­bildete Schwingkreis eine höhere Eigenfrequenz aufweist, was zu einer kürzeren Anstiegszeit des durch die Spule fließenden Stromes und damit zu einer kürzeren Anstiegs­zeit der Stoßwelle führt, was beim Zertrümmern von Kon­krementen durchaus wünschenswert ist.It should be mentioned that it is the invention - albeit partially or completely without a verb Serte high voltage resistance - 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 the capacitor in the high voltage supply can be charged to a higher charging voltage than the known shock wave generator. Thus, 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 leads to a shorter rise time of the shock wave, which is quite desirable when crushing concrements.

Ein Ausführungsbeispiel der Erfindung ist in der Zeich­nung dargestellt, deren einzige Figur einen Längsschnitt durch einen erfindungsgemäßen Stoßwellengenerator zeigt.An embodiment of the invention is shown in the drawing, the only figure of which shows a longitudinal section through a shock wave generator according to the invention.

Der erfindungsgemäße Stoßwellengenerator weist ein Gehäu­se 1 auf, das einen mit einer Flüssigkeit gefüllten, durch eine Membran 2 abgeschlossenen Raum 3 enthält. Der aus einem elektrisch leitenden Werkstoff gebildeten Mem­bran 2 gegenüberliegend ist eine Spule 4 mit spiralförmig angeordneten Windungen vorgesehen, wobei zwischen der Membran 2 und der Spule 4 eine Isolierfolie 5 angeordnet ist. Die Windungen der Spule 4 sind auf einer Auflageflä­che 6 eines Isolators 7 angeordnet, der in einer Kappe 8 aufgenommen ist. Die Membran 2, die Isolierfolie 5 und die den Isolator 7 mit der Spule 4 enthaltende Kappe 8 sind mittels Schrauben 9 an dem Gehäuse 1 befestigt. Zur Fixierung der Spule 4 an der Auflagefläche 6 des Isola­tors 7 ist der zwischen der Isolierfolie 5 und der Auf­lagefläche 6 des Isolators 7 befindliche Raum mit einem der Übersichtlichkeit halber nicht dargestellten elek­ trisch isolierenden Gießharz ausgefüllt. Die Spule 4 ist über Anschlüsse 10 und 11, die durch Bohrungen in dem Isolator 7 und der Kappe 8 nach außen treten, mittels ei­nes geeigneten Schaltmittels 12 an eine schematisch dar­gestellte Hochspannungsversorgung 13 anschließbar, die einen Stromstoß an die Spule 4 abgibt, wodurch die Mem­bran 2 schlagartig von der Spule 4 abgestoßen wird, was zur Ausbildung einer Stoßwelle in der Flüssigkeit im Raum 3 führt. Infolge der an der Spule 4 anliegenden Hochspan­nung treten zwischen der Membran 2 und den einzelnen Win­dungen der Spule 4 Potentialdifferenzen auf.The shock wave generator according to the invention 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. To fix the coil 4 to the support surface 6 of the insulator 7, the space between the insulating film 5 and the support surface 6 of the insulator 7 is provided with an elec trically insulating cast resin filled. The coil 4 can be connected via connections 10 and 11, which emerge through bores 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, thereby causing 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. As a result of the high voltage applied to the coil 4, potential differences occur between the membrane 2 and the individual turns of the coil 4.

Dabei ist vorgesehen, daß die Membran 2 auf Erdpotential 14 liegt, während der Anschluß 11 auf einem positiven Po­tential +U und der Anschluß 10 auf einem negativen Poten­tial -U liegt. Zwischen dem Anschluß 11 der Spule 4 und der Membran 2 liegt somit eine positive Potentialdiffe­renz vor. Dagegen liegt zwischen dem Anschluß 10 der Spu­le 4 und der Membran eine negative Potentialdifferenz vor. Beide Potentialdifferenzen sind aufgrund des Umstan­des, daß sich die Potentiale +U und -U, bezogen auf das Erdpotential 14, nur durch ihre Vorzeichen unterscheiden, dem Betrag nach gleich.It is provided that the membrane 2 is at ground potential 14, while the terminal 11 is at a positive potential + U and the terminal 10 is at a negative potential -U. There is therefore a positive potential difference between the connection 11 of the coil 4 and the membrane 2. In contrast, there is a negative potential difference between the terminal 10 of the coil 4 and the membrane. Because of the fact that the potentials + U and -U, based on the earth potential 14, differ only in their signs, their magnitude is the same.

Da bei dem in der Figur dargestellten Stoßwellengenerator die Windungen der Spule 4 einen konstanten Abstand zu der Membran 2 aufweisen, tritt zwischen den Windungen der Spule 4 und der Membran 2 höchstens eine Potentialdiffe­renz auf, die dem halben Betrag der von der Hochspan­nungsversorgung 13 abgegebenen Hochspannung entspricht. Gegenüber dem bekannten Stoßwellengenerator, bei dem die zwischen den Windungen der Spule 4 und der Membran 2 maximal vorliegende Potentialdifferenz dem Betrag der Hochspannung entsprechen würde, kann bei dem erfindungs­gemäßen Stoßwellengenerator die Spule 4 somit näher an der Membran 2 angebracht werden, ohne daß die Gefahr von Spannungsüberschlägen besteht.Since in the shock wave generator shown in the figure, the turns of the coil 4 are at a constant distance from the membrane 2, there occurs at most a potential difference between the turns of the coil 4 and the membrane 2 which corresponds to half the amount of the high voltage supplied by the high voltage supply 13 . Compared to the known shock wave generator, in which the maximum potential difference between the turns of the coil 4 and the membrane 2 would correspond to the magnitude of the high voltage, the coil 4 can thus be attached closer to the membrane 2 in the shock wave generator according to the invention without the risk of Flashover arises.

In dem Ausführungsbeispiel ist ein Stoßwellengenerator mit einer ebenen Membran 2 dargestellt. Es ist aber auch möglich, Stoßwellengeneratoren mit andersartig, z.B. sphärisch geformter Membran erfindungsgemäß auszubilden.In the exemplary embodiment, a 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.

Claims (3)

1. Stoßwellengenerator für eine Einrichtung zum berüh­rungslosen Zertrümmern von im Körper eines Lebewesens be­findlichen Konkrementen, welcher eine einen mit einer Flüssigkeit gefüllten Raum (3) abschließende, aus einem elektrisch leitenden Werkstoff gebildete Membran (2) und eine Spule (4) aufweist, deren Windungen in einer der Membran (2) gegenüberliegenden Fläche (6) angeordnet sind, wobei die Spule (4) mittels zweier Anschlüsse (10, 11) an eine Hochspannungsversorgung (13) anschließbar ist, dadurch gekennzeichnet, daß die Membran (2) auf einem solchen Potential (14) liegt, daß zwischen einem Anschluß (11) der Spule (4) und der Membran (2) eine positive und zwischen dem anderen Anschluß (10) der Spule (4) und der Membran (2) eine negative Potentialdifferenz vorliegt.1. Shock wave generator for a device for contactless smashing of concrements located in the body of a living being, which has a membrane (2) formed from an electrically conductive material and a coil (4), the windings of which are filled with a liquid-filled material, and their coils are arranged in a surface (6) opposite the membrane (2), the coil (4) being connectable to a high-voltage supply (13) by means of two connections (10, 11), characterized in that the membrane (2) is mounted on such a surface Potential (14) is that there is a positive potential difference between one connection (11) of the coil (4) and the membrane (2) and a negative potential difference between the other connection (10) of the coil (4) and the membrane (2). 2. Stoßwellengenerator nach Anspruch 1, dadurch gekennzeichnet, daß die zwischen der Mem­bran (2) und den Anschlüssen (10, 11) der Spule (4) je­weils vorliegenden Potentialdifferenzen ihrem Betrag nach gleich sind.2. Shock wave generator according to claim 1, characterized in that between the membrane (2) and the connections (10, 11) of the coil (4) each existing potential differences are equal in amount. 3. Stoßwellengenerator nach Anspruch 1 oder 2, da­durch gekennzeichnet, daß die Mem­bran (2) auf Erdpotential (14) liegt.3. Shock wave generator according to claim 1 or 2, characterized in that the membrane (2) is at earth potential (14).
EP87101803A 1986-07-14 1987-02-10 Shock-wave generator for a device for non-contacting desintegration of concretions in a living body Expired - Lifetime EP0253053B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3623775 1986-07-14
DE3623775 1986-07-14

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EP0253053A1 true EP0253053A1 (en) 1988-01-20
EP0253053B1 EP0253053B1 (en) 1994-04-27

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US (1) US4766888A (en)
EP (1) EP0253053B1 (en)
JP (1) JPH0340257Y2 (en)
DE (1) DE3789688D1 (en)

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Publication number Priority date Publication date Assignee Title
US5095891A (en) * 1986-07-10 1992-03-17 Siemens Aktiengesellschaft Connecting cable for use with a pulse generator and a shock wave generator
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Also Published As

Publication number Publication date
EP0253053B1 (en) 1994-04-27
JPS6316008U (en) 1988-02-02
DE3789688D1 (en) 1994-06-01
US4766888A (en) 1988-08-30
JPH0340257Y2 (en) 1991-08-23

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