[go: up one dir, main page]

DE2348063A1 - Press. wave pulse generator(s) - for shattering brittle inclusions in biological tissues, has wire-explosion generator(s) - Google Patents

Press. wave pulse generator(s) - for shattering brittle inclusions in biological tissues, has wire-explosion generator(s)

Info

Publication number
DE2348063A1
DE2348063A1 DE19732348063 DE2348063A DE2348063A1 DE 2348063 A1 DE2348063 A1 DE 2348063A1 DE 19732348063 DE19732348063 DE 19732348063 DE 2348063 A DE2348063 A DE 2348063A DE 2348063 A1 DE2348063 A1 DE 2348063A1
Authority
DE
Germany
Prior art keywords
pressure wave
inclusion
generator
arrangement according
wave generator
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.)
Pending
Application number
DE19732348063
Other languages
German (de)
Inventor
Eberhard Prof Dr Haeusler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19732348063 priority Critical patent/DE2348063A1/en
Publication of DE2348063A1 publication Critical patent/DE2348063A1/en
Pending legal-status Critical Current

Links

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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22004—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Vascular Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Mechanical Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Multimedia (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

Apparatus produces pressure wave pulses in liquids and biological tissues, for shattering brittle inclusions without contact; the wave neighbourhood of the inclusion. Pref. the condution, in the neighbourhood of the inclusion. PRef. the generator causes a spatial pressure wave profile resulting in focussing at the location of the inclusion. The pulses are caused by a wire explosion; the wire length and cross section, and the electrical energy, are such that a pulse of 1 mu sec and max. amplitude 1 kbar is caused at a few cm. from the generator. A system of generators may be used, with time-control to result in focussing, and to avoid overload of the tissues.

Description

Beschreibung der ErfindungDescription of the invention

"Vorrichtung zur berührungsfreien Zerstörung spröder, in flüssige oder biologische Medien eingebetteter Einschlüsse""Device for the contact-free destruction of brittle, Inclusions embedded in liquid or biological media "

In Veröffentlichungen aus den Jahren 1970 bi· 1973 wurde von dem Anmelder ein Verfahren beschrieben, mit dem es möglich ist, feste Einschlüsse in flüssiger Umgebung, deren Zugfestigkeit wesentlich geringer ist als ihre Druckfestigkeit, dadurch berührungsfrei zu zerstören, daß man eine Druckwelle hoher Amplitude (ca. 1 kbar) und sehr kurzer Zeitdauer (Halbwertsbreite-ca. 0,5 usec) durch die Flüssigkeit bzw. durch das biologische Gewebe zum Einschluss gelangen lässt. Beim Auftreffen dieses Druckwellenimpulses auf den Stein wird ein Teil direkt reflektiert, ein anderer Teil tritt in den Einschluss ein, und durchsetzt diesen ebenfalls als Druckwellenimpuls. An der gegenüberliegenden Berandung des Einschlusses tritt ein Teil der Welle in die Flüssigkeit über, ein weiterer Teil wird reflektiert und läuft als Zugwelle im Stein zurück. Bei genügend hoher Amplitude und genügend kurzer Zeitdauer wird dann durch den Hopkinson-Effekt ein Zerplatzen des Einschlusses bewirkt. Die Trümmer sind umso kleiner, je kürzer die Zeitdauer des Druckwellenimpulses ist.In publications from the years 1970 to 1973 was by the applicant described a method with which it is possible to remove solid inclusions in a liquid environment, whose Tensile strength is much lower than its compressive strength, thereby destroying without contact that one Pressure wave of high amplitude (approx. 1 kbar) and very short duration (half-width - approx. 0.5 usec) through the liquid or can get through the biological tissue to the inclusion. When this pressure wave pulse hits a part is reflected directly onto the stone, another part enters the inclusion and penetrates it also as a pressure wave pulse. At the opposite edge of the inclusion, part of the wave enters the Liquid over, another part is reflected and runs back as a pulling wave in the stone. If the amplitude is high enough and the duration is short enough, then through the Hopkinson effect causes the inclusion to burst. The shorter the period of time, the smaller the debris of the pressure wave impulse.

Der Gegenstand der Erfindung besteht in der Angabe von Vorrichtungen, die geeignet sind, derartige Druckwellen mit geeigneter räumlicher und zeitlicher Verteilung zu erzeugen.The object of the invention consists in specifying devices which are suitable for generating such pressure waves with a suitable spatial and temporal distribution.

Wegen der relativ hohen Dämpfung der Druckwelle im Körpergewebe ist es notwendig, relativ hohe Druckamplituden zu erzeugen und in die Flüssigkeit bzw. das biologische Gewebe einzuleiten.Because of the relatively high damping of the pressure wave in the body tissue, it is necessary to apply relatively high pressure amplitudes generate and introduce into the liquid or the biological tissue.

Um die Gewebebelastung in erträglichen Grenzen zu halten, soll nach dem Erfindungsgedanken weiterhin der.Druckimpuls von mehreren, räumlich getrennt angeordneten Druckwellenerzeugern hervorgerufen werden, deren Druckimpulse durch entsprechende zeitliche Steuerung und geometrische Konfiguration auf den Einschluss fokussiert werden sollen.In order to keep the tissue load within tolerable limits, according to the idea of the invention, the pressure pulse are caused by several, spatially separated pressure wave generators, the pressure pulses of which are caused by appropriate timing and geometric configuration should be focused on the inclusion.

5098U/0U25098U / 0U2

Nach dem Erfindungegedanken soll weiterhin diese zeitliche Steuerung mit Hilfe eines Rechenwerkes erfolgen. Die Ortung des Einschlusses soll mit Hilfe eines Ultraschallimpulsverfahrens erfolgen, wobei die Abstände der Stosswellenerzeuger von Einschluss mittels Ultraschallschwingern, die in unmittelbarer Nähe der Stossgeneratoren angeordnet sind, ermittelt werden. Damit erhält man den für die Ausbreitung von Stosswellen maßgeblichen "akustischen" Abstand zwischen Einschluss und den einzelnen Stoßwellengeneratoren.According to the invention, this should continue to be temporal Control take place with the help of an arithmetic unit. The location of the inclusion is to be done with the help of an ultrasonic pulse method take place, the distances of the shock wave generator from inclusion by means of ultrasonic transducers, the are arranged in the immediate vicinity of the shock generators. This gives you that for the spread of shock waves significant "acoustic" distance between Inclusion and the individual shock wave generators.

Claims (6)

Patentansprüche tClaims t Anordnung zur Herstellung von Druckwellenimpulsen in Flüssigkeiten und biologischen Geweben, dadurch gekennzeichnet, daß ein oder mehrere Druckwellenerzeuger akustisch leitend in der Nähe des zu zertrümmernden Einschlusses angeordnet sind.Arrangement for the production of pressure wave pulses in liquids and biological tissues, characterized in that that one or more pressure wave generators are acoustically conductive in the vicinity of the one to be smashed Inclusion are arranged. 2.) Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Druckwellenerzeuger ein räumliches Druckwellenprofil hervorruft, das zu einer Fokussierung am Ort des Einschlusses führt.2.) Arrangement according to claim 1, characterized in that the pressure wave generator creates a spatial pressure wave profile, which leads to a focus at the location of the confinement leads. 3.) Anordnung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Druckwellenimpulse durch eine Drahtexplosion hervorgerufen werden, wobei die Drahtlänge, Querschnitt und elektrische Energie so gewählt werden, daß ein Druckwellenimpuls von einer Zeitdauer von ca. 1 usec und einer Maximalamplitude von ca. 1 kbar im Abstand von einigen Zentimetern vom Druckerzeuger hervorgerufen werden.3.) Arrangement according to claim 1 and 2, characterized in that the pressure wave pulses by a wire explosion caused, the wire length, cross section and electrical energy are chosen so that a Pressure wave impulse with a duration of approx. 1 usec and a maximum amplitude of approx. 1 kbar at a distance caused by a few centimeters from the pressure generator will. 4.) Anordnung nach1Anspruch 1 bis 3» dadurch gekennzeichnet, daß die Erzeugung des Druckwellenimpulses durch ein System von Druckwellenerzeugern erfolgt, die durch entsprechende zeitliche Steuerung eine Fokussierung der Druckwelle am Ort des Einschlusses erfolgt.4.) Arrangement according to 1 claim 1 to 3 »characterized in that the generation of the pressure wave pulse is carried out by a system of pressure wave generators, which is carried out by appropriate timing a focusing of the pressure wave at the location of the inclusion. 5098U/0U25098U / 0U2 5.) Anordnung nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die Steuerung der Druckwellenerzeuger mit Hilfe eines Rechenwerkes erfolgt, das den durch in der Nähe der Druckwellenerzeuger angeordnete Ultraschallschwinger ermittelten akustischen Abstand zwischen Druckwellenerzeuger und Einschluss in die zur zeitlichen Steuerung der Druckwellenerzeuger benötigten Verzögerungszeiten umwandelt.5.) Arrangement according to claim 1 to 4, characterized in that that the control of the pressure wave generator takes place with the help of an arithmetic unit, which the through in the vicinity Ultrasonic transducers arranged in the pressure wave generator determined the acoustic distance between the pressure wave generator and inclusion in the delay times required for timing the pressure wave generator converts. 6.) Anordnung nach Anspruch 1 bis 5» dadurch gekennzeichnet, daß der Einschluss ein Nierenstein ist, und die Druckwellenerzeuger außerhalb des Körpers in einem Koppelmedium<(z.B. Wasser) angeordnet sind.6.) Arrangement according to claim 1 to 5 »characterized in that the inclusion is a kidney stone, and the pressure wave generator are arranged outside the body in a coupling medium (e.g. water). 5098 14/01425098 14/0142
DE19732348063 1973-09-25 1973-09-25 Press. wave pulse generator(s) - for shattering brittle inclusions in biological tissues, has wire-explosion generator(s) Pending DE2348063A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19732348063 DE2348063A1 (en) 1973-09-25 1973-09-25 Press. wave pulse generator(s) - for shattering brittle inclusions in biological tissues, has wire-explosion generator(s)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732348063 DE2348063A1 (en) 1973-09-25 1973-09-25 Press. wave pulse generator(s) - for shattering brittle inclusions in biological tissues, has wire-explosion generator(s)

Publications (1)

Publication Number Publication Date
DE2348063A1 true DE2348063A1 (en) 1975-04-03

Family

ID=5893520

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19732348063 Pending DE2348063A1 (en) 1973-09-25 1973-09-25 Press. wave pulse generator(s) - for shattering brittle inclusions in biological tissues, has wire-explosion generator(s)

Country Status (1)

Country Link
DE (1) DE2348063A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328039A1 (en) * 1983-08-03 1985-02-21 Siemens AG, 1000 Berlin und 8000 München Crushing device for concrements in the body of a living being
WO1992002926A1 (en) * 1990-07-31 1992-02-20 Arthur David Bryden Zebra mussel (dreissena polymorpha) and other aquatic organism control
DE19518408A1 (en) * 1995-05-19 1996-11-21 Bayer Ag Selected ceramic molded parts and process for the selection of faultless ceramic molded parts

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328039A1 (en) * 1983-08-03 1985-02-21 Siemens AG, 1000 Berlin und 8000 München Crushing device for concrements in the body of a living being
WO1992002926A1 (en) * 1990-07-31 1992-02-20 Arthur David Bryden Zebra mussel (dreissena polymorpha) and other aquatic organism control
US5432756A (en) * 1990-07-31 1995-07-11 1008786 Ontario Limited Zebra mussel (Dreissena polymorpha) and other aquatic organism control
CN1041075C (en) * 1990-07-31 1998-12-09 阿瑟·大为·布赖顿 Zebra mussel control
DE19518408A1 (en) * 1995-05-19 1996-11-21 Bayer Ag Selected ceramic molded parts and process for the selection of faultless ceramic molded parts
DE19518408C2 (en) * 1995-05-19 1998-07-02 Bayer Ag Selected ceramic molded parts and process for the selection of faultless ceramic molded parts

Similar Documents

Publication Publication Date Title
DE69012165T2 (en) Method and device for locating and focusing waves.
DE69631555T2 (en) DEVICE FOR CRUSHING CONCRETE
DE4241161C2 (en) Acoustic therapy facility
DE3119295C2 (en)
DE3607949C2 (en)
EP0308644B1 (en) Focusing ultrasonic transducer
DE3319871A1 (en) PIEZOELECTRIC CONVERTER FOR DESTROYING CONCRETE IN THE BODY
DE69522352T2 (en) Method and therapy device for generating ultrasound with reduced cavitation formation
DE595783T1 (en) Ultrasound treatment system.
EP0320433A3 (en) Process using ultrasonic or shock waves, and means for carrying it out
EP1749488B1 (en) Shockwave therapy apparatus with imaging
DE4424555A1 (en) Detection of corrosion fatigue cracks in diaphragm boiler tubes
DE3240691C1 (en) Device for generating shock wave pulse trains
DE2216264A1 (en) Method and device for material testing by means of ultrasound
DD248067A5 (en) GENERATOR WITH ELASTIC STRAITS OF LARGE STAERKS WHICH HAVE LIVING POINTS IN A LIQUID AND THROUGH COLLABORATIONS
DE2538960A1 (en) Therapeutic destruction of concretions by impulse laser - uses elliptical focussing chamber with shock waves produced at focal point
DE3520133C2 (en)
DE1136138B (en) Automatic ultrasound testing device
DE10394286T5 (en) Apparatus for improved shockwave renal fragmentation (SWL) using a piezoelectric ring assembly (PEAA) shockwave generator in combination with a primary shockwave source
DE3437488A1 (en) SOUND TRANSMITTER
DE2650624C2 (en) Device for smashing concretions in the body of a living being
DE2348063A1 (en) Press. wave pulse generator(s) - for shattering brittle inclusions in biological tissues, has wire-explosion generator(s)
DE3806532C2 (en)
DE3414362A1 (en) METHOD FOR ULTRASONIC TESTING BOLTS WITH A WALL THICKNESS
DE68907024T2 (en) ULTRASONIC TREATMENT DEVICE USING A FOCALIZING AND OSCILLATING PIEZOELECTRIC CERAMIC DEVICE.

Legal Events

Date Code Title Description
OHN Withdrawal