EP0253053B1 - Générateur d'ondes de choc pour un dispositif de désintégration à distance des concrétions dans un organisme vivant - Google Patents

Générateur d'ondes de choc pour un dispositif de désintégration à distance des concrétions dans un organisme vivant Download PDF

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Publication number
EP0253053B1
EP0253053B1 EP87101803A EP87101803A EP0253053B1 EP 0253053 B1 EP0253053 B1 EP 0253053B1 EP 87101803 A EP87101803 A EP 87101803A EP 87101803 A EP87101803 A EP 87101803A EP 0253053 B1 EP0253053 B1 EP 0253053B1
Authority
EP
European Patent Office
Prior art keywords
coil
membrane
wave generator
terminal
shock 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 - Lifetime
Application number
EP87101803A
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German (de)
English (en)
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EP0253053A1 (fr
Inventor
Sylvester Dipl.-Ing. Oppelt (Fh)
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 EP0253053A1 publication Critical patent/EP0253053A1/fr
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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 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 turns are arranged in a surface opposite the membrane , wherein the coil can be connected to a high-voltage supply by means of two connections and wherein one connection of the coil is connected to a first and the other connection of the coil to a second connection of the high-voltage supply and a first potential difference is present between the membrane and the one connection of the coil .
  • shock wave generator with a membrane arranged parallel to the coil is described in EP-A-0 133 665.
  • the shock waves are generated by connecting the coil to the high-voltage supply, which contains a capacitor charged to several kV, for example 20 kV.
  • 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 shock wave thus generated in the space filled with liquid, for example water is focused by suitable measures on the concrements in the body of the living being, for example kidney stones, 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 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.
  • the invention has for its object to design a generic shock wave generator so that its membrane has a long service life, without this being associated with a significant reduction in the efficiency of energy conversion.
  • this object is achieved in that the membrane is connected to a third connection of the high-voltage supply and that the potentials of the connections of the high-voltage supply are selected such that a second potential difference exists between the other connection of the coil and the membrane, which is their direction after the first is opposite to reduce the maximum potential difference between the membrane and coil to avoid voltage flashovers.
  • the potential difference that can occur between the windings of the coil and the membrane is less than the amount of 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 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 invention albeit partially or completely dispensing with an improved high-voltage strength - allows a larger electrical energy to be converted into impulse energy or, with the same electrical energy, to realize shorter rise times of the shock wave, since the one in the high-voltage supply Capacitor can be charged to a higher charging voltage than the known shock wave generator.
  • the capacitor can either release 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 filled with an electrically insulating resin, not shown, for the sake of clarity.
  • 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, 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 room 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, reads 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, with respect to the earth potential 14, differ only in their signs, the amount of the two potential differences 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 Flashovers exist.
  • 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. to form spherically shaped membrane according to the invention.

Claims (3)

  1. Générateur d'ondes de choc pour un dispositif qui est destiné à fragmenter sans contact des concrétions se trouvant dans le corps d'un être vivant et qui a une membrane (2), fermant une chambre (3) emplie de liquide et est en un matériau électriquement conducteur, et une bobine (4), dont les spires sont disposées sur une surface (6) opposée à la membrane (2), la membrane (4) pouvant être reliée au moyen de deux bornes (10, 11) à une alimentation à haute tension (13) et une borne (11) de la bobine (4) étant reliée à une première borne de l'alimentation à haute tension (13) et l'autre borne (10) de la bobine à une seconde borne de l'alimentation à haute tension (13), une première différence de potentiel était présente entre la membrane (2) et une borne (11) de la bobine (4), caractérisé par le fait que la membrane (2) est reliée à une troisième borne de l'alimentation à haute tension (13) et que les potentiels des bornes de l'alimentation à haute tension (13) sont choisis de manière à avoir entre l'autre borne (10) de la bobine (4) et la membrane (2) une seconde différence de potentiel, dont le sens est opposé à celui de la première différence de potentiel, pour diminuer la différence de potentiel maximale entre la membrane et la bobine afin d'empêcher des claquages.
  2. Générateur d'ondes de choc suivant la revendication 1, caractérisé par le fait que les valeurs absolues des différences de potentiel présentes respectivement entre la membrane (2) et les bornes (10, 11) de la bobine (4) sont égales.
  3. Générateur d'ondes de choc suivant la revendication 1 ou 2, caractérisé par le fait que la membrane (2) est placée au potentiel de terre (14).
EP87101803A 1986-07-14 1987-02-10 Générateur d'ondes de choc pour un dispositif de désintégration à distance des concrétions dans un organisme vivant Expired - Lifetime EP0253053B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
EP0253053A1 EP0253053A1 (fr) 1988-01-20
EP0253053B1 true EP0253053B1 (fr) 1994-04-27

Family

ID=6305178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87101803A Expired - Lifetime EP0253053B1 (fr) 1986-07-14 1987-02-10 Générateur d'ondes de choc pour un dispositif de désintégration à distance des concrétions dans un organisme vivant

Country Status (4)

Country Link
US (1) US4766888A (fr)
EP (1) EP0253053B1 (fr)
JP (1) JPH0340257Y2 (fr)
DE (1) DE3789688D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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
US4879993A (en) * 1986-10-29 1989-11-14 Siemens Aktiengesellschaft Shock wave source for generating a short initial pressure pulse
DE59005639D1 (de) * 1990-06-13 1994-06-09 Siemens Ag Elektrisch antreibbarer akustischer Stosswellengenerator.
DE4032357C1 (fr) * 1990-10-12 1992-02-20 Dornier Medizintechnik Gmbh, 8000 Muenchen, De
DE4123160C1 (fr) * 1991-07-12 1992-09-17 Siemens Ag, 8000 Muenchen, De
US6771565B2 (en) * 2002-03-01 2004-08-03 Lvb Systems Ltd. Low voltage seismic sound source

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328051A1 (de) * 1983-08-03 1985-02-14 Siemens AG, 1000 Berlin und 8000 München Einrichtung zum beruehrungslosen zertruemmern von konkrementen
DE8413031U1 (de) * 1984-04-27 1984-07-05 Siemens AG, 1000 Berlin und 8000 München Einrichtung zum berührungslosen Zertrümmernvon 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
DE3447440A1 (de) * 1984-12-27 1986-07-03 Siemens AG, 1000 Berlin und 8000 München Stosswellenrohr fuer die zertruemmerung von konkrementen

Also Published As

Publication number Publication date
JPS6316008U (fr) 1988-02-02
DE3789688D1 (de) 1994-06-01
US4766888A (en) 1988-08-30
JPH0340257Y2 (fr) 1991-08-23
EP0253053A1 (fr) 1988-01-20

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