WO1998033171A2 - Verfahren und vorrichtung zur erzeugung von stosswellen für technische, vorzugsweise medizintechnische anwendungen - Google Patents
Verfahren und vorrichtung zur erzeugung von stosswellen für technische, vorzugsweise medizintechnische anwendungen Download PDFInfo
- Publication number
- WO1998033171A2 WO1998033171A2 PCT/DE1998/000184 DE9800184W WO9833171A2 WO 1998033171 A2 WO1998033171 A2 WO 1998033171A2 DE 9800184 W DE9800184 W DE 9800184W WO 9833171 A2 WO9833171 A2 WO 9833171A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrolyte
- electrode
- sound
- electrodes
- generated
- Prior art date
Links
- 230000035939 shock Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003792 electrolyte Substances 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 230000010349 pulsation Effects 0.000 claims abstract description 6
- 238000002560 therapeutic procedure Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 150000001298 alcohols Chemical class 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000005684 electric field Effects 0.000 claims description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims 3
- 239000002482 conductive additive Substances 0.000 claims 2
- 239000011244 liquid electrolyte Substances 0.000 claims 2
- -1 Ethanol or methanol Chemical class 0.000 claims 1
- 238000007872 degassing Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000001902 propagating effect Effects 0.000 abstract 1
- 239000004575 stone Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000000913 Kidney Calculi Diseases 0.000 description 1
- MPCRDALPQLDDFX-UHFFFAOYSA-L Magnesium perchlorate Chemical compound [Mg+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O MPCRDALPQLDDFX-UHFFFAOYSA-L 0.000 description 1
- 206010029148 Nephrolithiasis Diseases 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 201000001883 cholelithiasis Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical group O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 208000001130 gallstones Diseases 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000003589 local anesthetic agent Substances 0.000 description 1
- 229960005015 local anesthetics Drugs 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
Classifications
-
- 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
- G10K15/00—Acoustics not otherwise provided for
- G10K15/04—Sound-producing devices
- G10K15/06—Sound-producing devices using electric discharge
Definitions
- the invention relates to a method for generating shock waves for technical, preferably medical, applications, in particular for lithotripsy or pain therapy, mechanical waves of high energy being generated by pressure pulsations.
- the invention relates to an apparatus for performing the method.
- One example is lithotripsy in medical technology, in which extra-corporal, focused pressure waves at the site of gall or kidney stones generate such a strong shock wave that the stone disintegrates into small fragments, which have no operative
- a shock wave generator is required that generates a sound wave that is already focused or that can be focused by means of acoustic lenses in particular, the focus of which must be at the location of the stone to be destroyed.
- the focal length of the acoustic arrangement should be small, that is to say in the range of a few 10 cm, in order to limit the energy density on the patient's body surface to such an extent, that is to ⁇ 1 J / cm 2 , that the pain resulting from the passage of sound can be controlled by local anesthetics.
- the pulse repetition rate should be around 1 to 5 per second.
- the shock wave generator must be as high as possible, ie at a few million pulses, in order to enable the treatment of a larger number of patients without the need for service or repair work.
- the properties of the shock wave generator in particular shock wave energy, pulse duration, focus position, etc., may not change or may change only slightly during the entire service life in order to enable constant, reproducible work results.
- the generation of the shock waves should take place in water or in liquids with acoustically comparable properties so that an efficient sound propagation and transmission into the patient's body is possible via an adapted acoustic impedance between the shock wave generator and the body.
- the focus diameter of the focused shock wave at the location of the stone should be comparable to the dimensions of the stone in order to achieve an efficient interaction between shock wave and stone.
- Typical wavelengths of the shock wave are in the range of 1 to 10 mm, corresponding to pulse durations of typically ⁇ 1 ⁇ s.
- the demands on the quality of the wave front in the shock wave generator are correspondingly high in order to achieve the required focusability.
- shock waves in which electrical Energy is converted into acoustic energy in the form of intense shock waves:
- the main disadvantages are the short lifespan, poor reproducibility and limited scalability of the shock wave transducers, the short lifespan, e.g. only a few 1000 pulses, due to the electrode erosion and the associated fluctuation in the focus position cause problems.
- Piezoelectric transducers are also severely limited in their mechanical life at the amplitudes required here.
- Electromagnetic transducers currently reach The largest lifespans of typically ⁇ 1 million pulses, however, are only scalable to a limited extent due to electrical and mechanical resilience. An extension of the lifespan to several million pulses would be advantageous, as would a wider scalability of the sound wave energy and pulse shape.
- the object of the invention is therefore to specify a method for generating shock waves, with which several million pulses can be generated without wear problems, and to create an associated device for this purpose.
- the object is achieved by the entirety of the features of method claim 1 and the associated device claim 7.
- Advantageous further developments are characterized in the subclaims.
- the invention is based on the fact that the short-term heating of a highly conductive electrolyte with the aid of an intense electrical pulse enables the electrical energy to be converted directly and largely without loss into thermal energy of the electrolyte.
- the heating detects larger, scalable volumes or large, also scalable surfaces simultaneously and homogeneously.
- current density and electric field strength remain largely constant within the liquid layer, the thickness of the liquid layer being smaller than the wavelength to be generated, but the transverse dimension being large in comparison.
- the thermal expansion of the heated electrolyte causes an increase in pressure in a suitable ambient medium and thus, under suitable conditions, a
- thermohydraulic shock wave converter On the basis of the principle according to the invention, almost any scalability and geometry is possible with the almost wear-free behavior of such a thermohydraulic shock wave converter. Since, in contrast to the electrohydraulic principle, there is generally no concentration of the current flow due to plasma formation at individual points on the electrodes, the operation of such an arrangement does not lead to the electrodes being burned up, as a result of which a long service life can be achieved. Due to the spatially homogeneous power load of the electrolyte, the membrane or acoustically "permeable" electrode is mechanically very homogeneously loaded, whereby the life of the membrane is also greatly increased compared to electromagnetic transducers.
- the parallel connection of a large number of such channels means that, due to the slight differences between the channels, a single channel is preferred, which is then heated up more than the others; the earlier and stronger current flow resulting from the stronger heating generally leads to a high-current breakdown, so that due to the nonlinearity of the processes leading to the breakdown, the principle can only be operated at safe power densities far from the dielectric strength of the electrolyte. This severely limits both the amplitude and the efficiency of such a pulsed sound source. Even minor ones
- An arrangement according to the present invention has the advantage that by specifically avoiding field-reinforcing structures - wires, tips, edges or even constrictions in the current-carrying area - large and homogeneously large volumes can be evenly loaded up to the limit of dielectric strength, so that there are no restrictions in terms of pulse energy and scalability.
- the main advantage of the new arrangement is in that the resulting wave fronts are very even, so that you get an almost unlimited scalable pulse sound source with high quality of the wave front.
- thermohydraulic sound transducers According to the invention, they each show a schematic representation
- thermohydraulic shock wave generator with flat electrodes and associated power pulse generator
- FIG. 2 shows a rotationally symmetrical thermohydraulic shock wave generator and associated power pulse generator with a radial electrode arrangement and radial current flow
- FIG. 3 shows a thermohydraulic shock wave generator with concave electrodes, and a section of a specific formation of a focusing electrode.
- thermohydraulic sound transducer with flat electrodes.
- a flat sound wave is generated, which can be focused by an acoustic lens that may follow.
- the sound transducer consists of a fixed, solid electrode 1, a thin and light electrode 2 at a distance s from the electrode 1, the electrolyte 3 of the layer thickness s, and the sound propagation medium 4.
- the fixed electrode 1 and the membrane-shaped electrode 2 are both made of materials which are corrosion-resistant to the media 3 and 4 and have smooth surfaces in order to form localized discharges to avoid due to excessive field strength at tips etc.
- the product of mass density and speed of sound of the electrode 1 is significantly larger than the products of this
- the acoustic impedance of the electrolyte 3 and the sound propagation medium 4 should be as equal as possible and approximately that of water, i.e. the main component of the human body, in order to achieve a good acoustic adaptation between the transducer and the patient's body.
- water i.e. the main component of the human body
- a conductive salt solution is used as the electrolyte 3.
- a particularly simple embodiment uses the same material for the sound propagation medium 4 as for the electrolyte 3. Liquids other than water, but with comparable electrical and acoustic properties, can also be used for this purpose. Particularly in applications other than lithotripters, it makes sense to adapt the acoustic impedance of media 3 and 4 to that of the coupling medium. This is particularly important in applications other than medical technology, such as rock crushing using shock waves.
- the current supply to the electrode 2 must be constructed symmetrically in order to achieve the desired symmetry of the pressure wave to be generated via a symmetrical current and power distribution in the electrolyte 3. This is advantageous
- a power pulse generator 5 is connected to the electrodes 1 and 2 and provides electrical energy in the form of short pulses with time periods of typically ⁇ s.
- the pulse generator consists of one Energy store in the form of a high-voltage capacitor C, a fast-closing switching element S, and an inductance L formed from the supply lines. When the switch S is closed, the capacitor C discharges via the inductance L and the switch S into the electrolyte with the internal resistance R.
- the energy content E of the storage is
- ⁇ p ⁇ * E / [c s * ⁇ * ⁇ * p m * Ch * A] The latter means that the amplitude of the pressure increase is independent of the layer thickness s.
- a magnification of A can be the focus he scaled ⁇ targetable tip prints in a wide range. With the aid of the arrangement described, it is thus possible to generate shock waves with amplitudes in the> 100 bar range which are suitable for use in lithotripters in a reproducible and practically wear-free manner.
- An increase in pressure is obtained by shortening the pulse duration, because due to the finite speed of sound, the energy deposited in the electrolyte is distributed over a smaller volume and the pressure rise is accordingly reduced over a shorter distance.
- liquids with a low heat capacity and low compressibility with a high coefficient of thermal expansion are advantageous.
- An example is ethanol, which is mixed with ion-conducting additives.
- an additive for example, an admixture of water with a salt dissolved in it is suitable in order to achieve the required conductivity.
- pressures of the order of magnitude ⁇ p ⁇ 40 bar are obtained when using ethanol.
- higher-quality alcohols which are non-flammable at room temperature such as, for example, ethylene glycol or glycerol with salts soluble therein, e.g. Magnesium perchlorate or lithium chloride.
- an advantageous embodiment uses an electrode arrangement with current flow in the radial instead of the axial direction and thus allows higher operating voltages on the electrolyte 3.
- the power pulse is sent to one in the S ymmetrieachse central electrode 8 and a thereto coaxial, cylindrical or ring-shaped electrode 7 is egt ⁇ l.
- the current flows in the radial direction between the electrodes 7 and 8 in the electrolyte 3. This means that the current flow - in contrast to FIG. 1 with a current flow in the liquid layer in the direction of the preferred sound propagation - in this case, perpendicular to the direction of sound propagation.
- the electrolyte 3 with the layer thickness s is delimited on one side by an insulating plate 9 and on the other side by a likewise insulating membrane 10 against the propagation medium 4 in order to limit the current flow to the volume with the electrolyte thickness s.
- the electrode pitch s is thereby expanded from s to approximately the radius of the arrangement, as a result of which much higher voltages are permitted at the electrodes without the risk of breakdown in the electrolyte. As a result, a much higher energy density can be generated in the electrolyte 3, which leads to considerably higher pressure amplitudes than in the case of axial current flow.
- Focusing of the pressure wave is advantageously achieved in that two electrodes 21 and 22 are not flat, but are concave in accordance with FIG. A curved wavefront is thus generated, which leads to a concentrically incoming pressure wave which has a pronounced focus in the focal point of the reflector formed by the electrode surface of the electrode 21.
- An acoustic lens can be dispensed with in this self-focusing arrangement, so that the imaging errors and losses associated with the lens are eliminated.
- Electrodes 21 and 22 Forming the electrodes 21 and 22 in a convex shape would lead to the formation of spherically expanding shock waves, which are used, for example, for ultrasound tomography in medical technology and in general technology for sonar systems in the Water and in the earth's crust, the so-called “geo-mapping", can be used.
- the geometry of the electrodes 1 and 2 can have a geometry other than flat or spherical. If cylindrical electrode shapes are used, a line focus can be generated, for example, which can advantageously be used for the precise separation of brittle objects, such as semiconductor wafers, glass workpieces, ceramic substrates, optical components, ceramic tiles, etc., or for cleaning larger castings.
- a thermohydraulic shock wave generator can be optimized for almost any application in which high mechanical forces are short-lived, i.e. jerky, are needed.
- a regular or irregular grid structure can be arranged between the two electrodes 1 and 2, which serves to define the distance between the two electrodes, so as to prevent the minimum distance necessary to avoid flashovers from being undershot.
- An insulating plastic with a dielectric number similar to that of the electrolyte 3 used between the electrodes 1 and 2 is expediently used for the material of the grid. This prevents local field elevations at the triple points of the electrode-grid-medium 3 transition that could otherwise lead to undesired flashovers.
- the coupling with the pulse generator is decisive for the dimensioning of the shock wave generator.
- the rings 11 can each have a conical shape in cross section, the surfaces 111 forming conical outer surfaces. Other geometries are also possible. Thus, the surfaces of the rings 11 can form curved surfaces of the rotating body. Spheroid, ellipsoid or paraboloid surfaces are possible.
- the angle ⁇ is calculated in such a way that the normal cones with their tips are all in the required focus point through the respective ring center. The relationship applies to this
- R x is the mean radius of the xth ring and F is the distance of the focus from the electrode surface.
- the ring width is advantageously chosen so that the maximum heights of the rings above the central, ie planar electrode surface are ⁇ 0.25 * d, where d is the average electrode spacing. This does not unduly lower the dielectric strength of the arrangement.
- An additional requirement for the ring width is raised by the permissible deviations of the position of the partial foci from the common focus and the associated broadening of the focus diameter.
- An advantageous embodiment does not use the conical lateral surfaces as the simplest embodiment for the surfaces of the turned-in rings, but spherical surfaces whose radii r x are calculated in such a way that a fine correction of the
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Surgical Instruments (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59801035T DE59801035D1 (de) | 1997-01-24 | 1998-01-21 | Verfahren und vorrichtung zur erzeugung von stosswellen für technische, vorzugsweise medizintechnische anwendungen |
JP53148698A JP2001509045A (ja) | 1997-01-24 | 1998-01-21 | 技術的、特に医療技術的用途のための衝撃波の発生方法及び装置 |
EP98907846A EP0954847B1 (de) | 1997-01-24 | 1998-01-21 | Verfahren und vorrichtung zur erzeugung von stosswellen für technische, vorzugsweise medizintechnische anwendungen |
US09/360,945 US6383152B1 (en) | 1997-01-24 | 1999-07-26 | Apparatus for producing shock waves for technical, preferably medical applications |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702593.5 | 1997-01-24 | ||
DE19702593A DE19702593C2 (de) | 1997-01-24 | 1997-01-24 | Verfahren und Vorrichtung zur Erzeugung von Stoßwellen für technische, vorzugsweise medizintechnische Anwendungen |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/360,945 Continuation US6383152B1 (en) | 1997-01-24 | 1999-07-26 | Apparatus for producing shock waves for technical, preferably medical applications |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998033171A2 true WO1998033171A2 (de) | 1998-07-30 |
WO1998033171A3 WO1998033171A3 (de) | 1998-11-12 |
Family
ID=7818297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/000184 WO1998033171A2 (de) | 1997-01-24 | 1998-01-21 | Verfahren und vorrichtung zur erzeugung von stosswellen für technische, vorzugsweise medizintechnische anwendungen |
Country Status (5)
Country | Link |
---|---|
US (1) | US6383152B1 (de) |
EP (1) | EP0954847B1 (de) |
JP (1) | JP2001509045A (de) |
DE (2) | DE19702593C2 (de) |
WO (1) | WO1998033171A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10053243C2 (de) * | 2000-10-27 | 2002-12-05 | Siemens Ag | Verfahren und Vorrichtung zur Verfeinerung eines Pulvers |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19743336C2 (de) * | 1997-09-30 | 2002-01-31 | Siemens Ag | Vorrichtung zur Erzeugung von Ultraschallfeldern |
DE10012878B4 (de) | 2000-03-16 | 2004-09-30 | Siemens Ag | Vorrichtung zur Erzeugung akustischer Wellen |
US6787974B2 (en) * | 2000-03-22 | 2004-09-07 | Prorhythm, Inc. | Ultrasound transducer unit and planar ultrasound lens |
DE10053222C2 (de) * | 2000-10-27 | 2002-11-21 | Siemens Ag | Verfahren zur Online-Qualitätskontrolle und zugehörige Vorrichtung |
DE10053481C2 (de) * | 2000-10-27 | 2002-10-24 | Siemens Ag | Verfahren zur Qualitätsprüfung eines elektrischen Bauteils |
DE10055633C2 (de) * | 2000-11-10 | 2002-10-10 | Siemens Ag | Stoßwellenquelle |
DE10230879A1 (de) * | 2002-07-09 | 2004-01-29 | Siemens Ag | Verfahren zur Erzeugung von Kavitation mittels hochintensiver Schallwellenimpulse und zugehörige Anordnung |
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 |
NZ731676A (en) | 2006-10-26 | 2018-11-30 | Xyleco Inc | Processing biomass |
US8236535B2 (en) | 2008-04-30 | 2012-08-07 | Xyleco, Inc. | Processing biomass |
US8212087B2 (en) | 2008-04-30 | 2012-07-03 | Xyleco, Inc. | Processing biomass |
RU2636399C1 (ru) | 2008-04-30 | 2017-11-23 | Ксилеко, Инк. | Переработка биомассы |
US7867358B2 (en) | 2008-04-30 | 2011-01-11 | Xyleco, Inc. | Paper products and methods and systems for manufacturing such products |
US8776625B2 (en) * | 2010-05-21 | 2014-07-15 | Focus-In-Time, LLC | Sonic resonator system for use in biomedical applications |
WO2015111603A1 (ja) * | 2014-01-24 | 2015-07-30 | 国立大学法人東京大学 | 超音波発生素子 |
US9879507B2 (en) | 2015-10-22 | 2018-01-30 | Dennis W. Gilstad | Adaptive stimulation system |
WO2022127506A1 (zh) * | 2020-12-16 | 2022-06-23 | 深圳市赛禾医疗技术有限公司 | 一种压力波发生装置及医疗器械 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE911222C (de) * | 1943-05-27 | 1954-05-10 | Hermann Papst | Schallsender |
DE1076413B (de) * | 1954-06-02 | 1960-02-25 | Fruengel Frank Dr Ing | Stoss-Schallquelle |
DE1814561A1 (de) * | 1967-12-14 | 1969-08-21 | Inst Francais Du Petrol | Funkengeber zum seismischen Aufschliessen |
GB2140693A (en) * | 1983-06-01 | 1984-12-05 | Wolf Gmbh Richard | Piezoelectric transducer for the destruction of concretions within an animal body |
US4703463A (en) * | 1986-04-09 | 1987-10-27 | Bernell Izard | Seismic vibration apparatus |
US5105801A (en) * | 1989-06-30 | 1992-04-21 | Technomed International | Method and apparatus for improving the reproducibility and efficiency of the pressure waves generated by a shock wave generating apparatus |
US5245988A (en) * | 1989-11-15 | 1993-09-21 | Dormer Gmbh | Preparing a circuit for the production of shockwaves |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1911424A1 (de) * | 1969-03-06 | 1970-09-24 | Siemens Ag | Verfahren zum Bearbeiten von Werkstuecken mittels Unterwasser-Druckstoessen |
DE3447440A1 (de) * | 1984-12-27 | 1986-07-03 | Siemens AG, 1000 Berlin und 8000 München | Stosswellenrohr fuer die zertruemmerung von konkrementen |
EP0240797B1 (de) * | 1986-04-01 | 1990-07-11 | Siemens Aktiengesellschaft | Stosswellenquelle mit erhöhtem Wirkungsgrad |
US4796608A (en) * | 1986-06-16 | 1989-01-10 | Siemens Aktiengesellschaft | Shock wave generator for an apparatus for non-contacting disintegration of calculi in the body of a life form |
EP0381796B1 (de) * | 1989-02-10 | 1995-08-09 | Siemens Aktiengesellschaft | Ultraschall-Sensor |
US5251614A (en) * | 1989-06-30 | 1993-10-12 | Technomed International | Method and device interposing an electrically conductive liquid between electrodes and shockwave apparatus for method and device |
DE9109025U1 (de) * | 1990-08-02 | 1991-12-05 | Siemens AG, 80333 München | Generator zur Erzeugung akustischer Zugimpulse |
US5233972A (en) * | 1990-09-27 | 1993-08-10 | Siemens Aktiengesellschaft | Shockwave source for acoustic shockwaves |
DE4139024C1 (de) * | 1991-11-27 | 1993-04-15 | Siemens Ag, 8000 Muenchen, De | |
WO1996009621A1 (de) * | 1994-09-21 | 1996-03-28 | Hmt High Medical Technologies Entwicklungs- Und Vertriebs Ag | Verfahren und vorrichtung zur erzeugung von stosswellen für die medizinische therapie, insbesondere für die elektro-hydraulische lithotripsie |
-
1997
- 1997-01-24 DE DE19702593A patent/DE19702593C2/de not_active Expired - Fee Related
-
1998
- 1998-01-21 EP EP98907846A patent/EP0954847B1/de not_active Expired - Lifetime
- 1998-01-21 JP JP53148698A patent/JP2001509045A/ja not_active Ceased
- 1998-01-21 WO PCT/DE1998/000184 patent/WO1998033171A2/de active IP Right Grant
- 1998-01-21 DE DE59801035T patent/DE59801035D1/de not_active Expired - Fee Related
-
1999
- 1999-07-26 US US09/360,945 patent/US6383152B1/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE911222C (de) * | 1943-05-27 | 1954-05-10 | Hermann Papst | Schallsender |
DE1076413B (de) * | 1954-06-02 | 1960-02-25 | Fruengel Frank Dr Ing | Stoss-Schallquelle |
DE1814561A1 (de) * | 1967-12-14 | 1969-08-21 | Inst Francais Du Petrol | Funkengeber zum seismischen Aufschliessen |
GB2140693A (en) * | 1983-06-01 | 1984-12-05 | Wolf Gmbh Richard | Piezoelectric transducer for the destruction of concretions within an animal body |
US4703463A (en) * | 1986-04-09 | 1987-10-27 | Bernell Izard | Seismic vibration apparatus |
US5105801A (en) * | 1989-06-30 | 1992-04-21 | Technomed International | Method and apparatus for improving the reproducibility and efficiency of the pressure waves generated by a shock wave generating apparatus |
US5245988A (en) * | 1989-11-15 | 1993-09-21 | Dormer Gmbh | Preparing a circuit for the production of shockwaves |
Non-Patent Citations (2)
Title |
---|
BOURLION M ET AL: "DESIGN AND CHARACTERIZATION OF A SHOCK WAVE GENERATOR USING CANALIZED ELECTRICAL DISCHARGE: APPLICATION TO LITHOTRIPSY" REVIEW OF SCIENTIFIC INSTRUMENTS, Bd. 65, Nr. 7, 1.Juli 1994, Seiten 2356-2363, XP000458557 in der Anmeldung erw{hnt * |
RINK K ET AL: "Incidence of cavitation in the fragmentation process of extracorporeal shock wave lithotriptors" APPLIED PHYSICS LETTERS, 9 MAY 1994, USA, Bd. 64, Nr. 19, ISSN 0003-6951, Seiten 2596-2598, XP002071136 in der Anmeldung erw{hnt * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10053243C2 (de) * | 2000-10-27 | 2002-12-05 | Siemens Ag | Verfahren und Vorrichtung zur Verfeinerung eines Pulvers |
Also Published As
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DE19702593A1 (de) | 1998-07-30 |
EP0954847B1 (de) | 2001-07-18 |
WO1998033171A3 (de) | 1998-11-12 |
DE19702593C2 (de) | 2000-07-06 |
DE59801035D1 (de) | 2001-08-23 |
JP2001509045A (ja) | 2001-07-10 |
US6383152B1 (en) | 2002-05-07 |
EP0954847A2 (de) | 1999-11-10 |
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