WO1997010758A1 - Vorrichtung zur behandlung von körpergewebe und zur zertrümmerung von körpersteinen - Google Patents
Vorrichtung zur behandlung von körpergewebe und zur zertrümmerung von körpersteinen Download PDFInfo
- Publication number
- WO1997010758A1 WO1997010758A1 PCT/DE1996/001794 DE9601794W WO9710758A1 WO 1997010758 A1 WO1997010758 A1 WO 1997010758A1 DE 9601794 W DE9601794 W DE 9601794W WO 9710758 A1 WO9710758 A1 WO 9710758A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sound
- transmission medium
- acoustic waves
- interface
- propagation
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/225—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for for extracorporeal shock wave lithotripsy [ESWL], e.g. by using ultrasonic waves
- A61B17/2251—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for for extracorporeal shock wave lithotripsy [ESWL], e.g. by using ultrasonic waves characterised by coupling elements between the apparatus, e.g. shock wave apparatus or locating means, and the patient, e.g. details of bags, pressure control of bag on patient
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/225—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for for extracorporeal shock wave lithotripsy [ESWL], e.g. by using ultrasonic waves
- A61B17/2256—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for for extracorporeal shock wave lithotripsy [ESWL], e.g. by using ultrasonic waves with means for locating or checking the concrement, e.g. X-ray apparatus, imaging means
- A61B17/2258—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for for extracorporeal shock wave lithotripsy [ESWL], e.g. by using ultrasonic waves with means for locating or checking the concrement, e.g. X-ray apparatus, imaging means integrated in a central portion of the shock wave apparatus
Definitions
- the invention relates to a device for the treatment of body tissue and / or for the destruction of body stones by means of acoustic energy, that is to say for example by means of shock, pressure or ultrasound waves according to the preamble of claim 1.
- a device which is used in the formulation of the preamble of claim 1, is known from EP-A-0 369 177.
- a device is described in this document, to which, as well as to the prior art mentioned in this document including the research report for explaining all terms not described here or not described in detail, an apparatus is described, which among other things. can be used as an extracorporeal litho tripter.
- the known devices of this type have a sound generating unit which generates a flat, a cylindrical, an approximately spherical or an already focused wave field in a transmission medium. If the generated wave field does not have the desired “bundling” or focusing, the sound generating unit is followed by a bundling unit for the acoustic waves. arranges.
- the bundling unit can be a reflector with - depending on the design of the sound generating unit - parabolic or elliptical cross section, a shock wave tube and / or an acoustic lens etc.
- the sound generation unit and the bundling unit which may be provided are outside the human body, i.e. arranged extracorporeally.
- continuous, pulsed or repetitive acoustic wave fields pressure, impact, pulsed or unpulsed ultrasonic fields
- the acoustic waves are generated in water and then coupled into the body via a water cushion or in an open water bath.
- water appears to be a suitable transmission medium, because one can assume, to a good approximation, that body tissue and water have a similar acoustic impedance.
- the acoustic energy is transmitted into the body without great reflection losses.
- Water as a transmission medium also lends itself to ease of handling. This is the reason why today all known lithotriptors and ultrasound therapy devices work with water as the transmission medium.
- the acoustic impedance Z is defined by the product of density and the speed of sound propagation c. If the impedance Z of the transmission medium is the same or at least approximately the same as the impedance of the body tissue, a low-loss energy coupling is guaranteed. This goal is also achieved if the values for the density and speed of sound differ significantly in the two media, as long as only the product of the respective values is at least approximately the same for both media.
- the focal energy density achievable in the body is decisively influenced by whether the waves can propagate undisturbed in the body or whether they are deflected by obstacles from the intended direction of propagation, i.e. broken, scattered or bent. The deviations from the desired direction of propagation are greater the further in front of the zone of effect.
- Obstacles where there are deviations from the linear spread are e.g. Organ boundaries at which breakage and reflection take place due to a change in the propagation speed.
- the rate of propagation of ultrasonic waves in the kidney or in the liver differs in part by more than 50 m / s from that in water.
- the entrance surface of the acoustic waves i.e. the patient's skin has a special influence because it is furthest away from the focus zone in the interior of the body, ie slight deviations from the linear spread on the way to the focus zone have significant lateral deviations.
- the adipose tissue immediately adjacent to the skin has a speed of propagation for acoustic waves that differs significantly from that of water, so that large breaking effects can be expected at this interface:
- the rate of expansion in adipose tissue is between 1350 and 1480 m / s, while in water at temperatures between approx. 20 ° C and 50 ° C it is between 1480 m / s and 1550 m / s.
- the invention is therefore based on the object of increasing the efficiency or the efficiency of therapy devices which work with concentrated acoustic waves by minimizing deviations from the linear or intended propagation of acoustic waves during the transition from the transmission medium into the body and thereby increasing the energy density in focus.
- the shape of the interface or the conditions at the interface between the transmission medium and the body are set in such a way that the energy is transmitted from the sound generating unit to the body without significant deviations from the desired spread,
- the conditions at the interface can be set, for example, by using as the medium for the transmission of acoustic waves a material which, with respect to the refractive index or, in other words, the speed of propagation, is matched as closely as possible to the superficial tissue layers of the human body index matching is carried out:
- the near-surface fatty tissue has a propagation speed for acoustic waves of about 1350-1400 m / s
- water 32 ° C with about 1520 m / s
- so far used criterion of impedance matching as good as possible in order to avoid unnecessary reflection losses.
- the transmission medium is in direct contact with the body or whether one or more thin boundary layers, such as coupling pads, intermediate foils or the like, prevent direct contact. As long as these intermediate layers are comparatively thin, there will be no significant distraction from the linear propagation even when the acoustic waves pass obliquely through these layers.
- Another - alternative or additional - possibility of avoiding undesired deviations from the linear or intended propagation of the acoustic waves is to shape the geometry of the interface in such a way that deviations do not occur or only in a controlled manner:
- the coupling surface is changed in a controlled manner.
- the coupling surface can be created by pressing appropriately shaped applicators flat, spherical or otherwise regularly or controlled shaped interfaces, the effects of which on the propagation of the acoustic waves can be specifically taken into account.
- This also enables effective zones with a high energy density to be created inside the body and largely prevents undesirable deviations from the ideal spread.
- the invention provides a device whose efficiency is increased compared to conventional therapy devices that work with concentrated acoustic waves.
- This increase in efficiency is a consequence of the measures according to the invention, by means of which deviations in the refraction of the waves from the "ideal passage" during the transition of the acoustic waves from the transmission medium into the patient's body are minimized.
- a smaller focus than with conventional devices and thus an increased energy density in the effective range can be achieved.
- Fig. 1 shows a cross section through a device according to the invention
- FIG. 1 shows, without limitation, as an example a device for the treatment of body tissue and / or for the destruction of body stones by means of pressure waves, as described in EP-A-0 369 177.
- the invention can also be applied to other devices, such as those recognized as prior art in the cited publication, and which have sound sources of a different configuration.
- the device shown in FIG. 1 has a cylinder coil 1, which is surrounded by a membrane 2, as the sound source or as the sound generating unit.
- the sound source emits a cylindrical wave field, which a reflector 3 "ideally focuses in the small area F.
- the reflector 3 has the shape of a paraboloid of revolution. At the" focus point "F there is a stone 4 in a kidney 5. With 6, the outer contour of a human body.
- the reflector 3 is closed by a film or membrane 8, so that there is a closed chamber 7 which is filled with a transmission medium for the acoustic waves generated by the sound generating unit.
- the transmission medium conducts the acoustic waves, the waves 9 to the body 6.
- 10 denotes lines by means of which the transmission medium can be pumped into the chamber 7 or pumped out there.
- 11 denotes an ultrasound locating unit which is arranged within the sound source and is displaceable in the direction of the axis.
- the device shown in Fig. 1 is known from EP-A-0 369 177.
- the transmission medium, which is located in the chamber 7, is water, which has a different refractive index than the body tissue.
- Fig. 2a shows the conditions that arise with undisturbed wave propagation.
- the "straight" grating symbolizes the propagation of the ultrasonic waves.
- the ultrasound waves are focused in an area F with a small lateral extent.
- FIG. 2b shows the conditions which result from a wave propagation which is disturbed by the lack of index adaptation.
- the "wave-shaped" grating symbolizes the disturbed propagation of the ultrasonic waves.
- the ultrasound waves are focused with a large lateral extension in a region g0 disturbing.
- this disturbance can at least be reduced by adapting the transmission medium in the chamber 7 in the refractive index or, in other words, with its speed of propagation to the superficial tissue layers of the body.
- a fluid is selected as the transmission medium, which has a propagation speed for acoustic waves in the range from 1350 to 1400 m / s.
- a suitable fluid is, for example, an oil and in particular a paraffin oil.
- a second possibility is that the geometry of the coupling surface is designed in a controlled manner, e.g. is deformed into a flat, spherical or aspherical surface, the influence of which on the propagation of the acoustic waves is known and is taken into account when determining the focus position.
- the film or membrane 8 which is used in the coupling cushions of conventional devices is replaced by an applicator which is pressed onto the body with comparatively high pressure, so that a defined interface geometry between the human body 6 and the sound exit surface of the device.
- FIG. 2c shows the real conditions in the human body with the kidney and liver L.
- the chamber 7 for example in the case of a line through a membrane
- the chamber which surrounds the sound source 1 is to be filled with water and the chamber 7 ", which adjoins the body 8, with a fluid with an adapted refractive index.
- the device according to the invention for the treatment of body tissue and for the destruction of body concretions to generate high energy densities of pressure, shock or ultrasound waves in the interior of the body.
- the device according to the invention increases the effect of the acoustic energy introduced in the defined action or focus zone in that the concentration of the energy on this zone compared to conventional ones Process is improved, that is, a more intensive effect in the predetermined zone and at the same time protection of the surrounding tissue is achieved.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59611378T DE59611378D1 (de) | 1995-09-20 | 1996-09-20 | Vorrichtung zur behandlung von körpergewebe und zur zertrümmerung von körpersteinen |
EP96938947A EP0851741B1 (de) | 1995-09-20 | 1996-09-20 | Vorrichtung zur behandlung von körpergewebe und zur zertrümmerung von körpersteinen |
US09/043,662 US6059741A (en) | 1995-09-20 | 1996-09-20 | Device for treating corporal tissue and for crushing corporal concretions |
JP9512201A JPH11512323A (ja) | 1995-09-20 | 1996-09-20 | 身体組織の処置用ならびに組織の結石粉砕用装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19534809.5 | 1995-09-20 | ||
DE19534809A DE19534809A1 (de) | 1995-09-20 | 1995-09-20 | Vorrichtung zur Behandlung von Körpergewebe und zur Zertrümmerung von Körpersteinen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997010758A1 true WO1997010758A1 (de) | 1997-03-27 |
Family
ID=7772612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/001794 WO1997010758A1 (de) | 1995-09-20 | 1996-09-20 | Vorrichtung zur behandlung von körpergewebe und zur zertrümmerung von körpersteinen |
Country Status (6)
Country | Link |
---|---|
US (1) | US6059741A (de) |
EP (1) | EP0851741B1 (de) |
JP (1) | JPH11512323A (de) |
AT (1) | ATE336947T1 (de) |
DE (2) | DE19534809A1 (de) |
WO (1) | WO1997010758A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19914809B4 (de) * | 1999-03-31 | 2006-10-05 | Dornier Medtech Holding International Gmbh | Verwendung eines abbildenden Systems in einer Vorrichtung zur Erzeugung von fokussierten Stoßwellen |
EP2722012A1 (de) | 2012-10-18 | 2014-04-23 | Storz Medical Ag | Vorrichtung zur Stoßwellentherapie eines menschlichen Gehirns |
US11484724B2 (en) | 2015-09-30 | 2022-11-01 | Btl Medical Solutions A.S. | Methods and devices for tissue treatment using mechanical stimulation and electromagnetic field |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10225709B4 (de) * | 2002-06-10 | 2005-09-22 | Siemens Ag | Balg zur Ankopplung einer Quelle akustischer Wellen an ein Lebewesen |
PL2564338T3 (pl) | 2010-04-28 | 2021-10-18 | Empi Corp. | Systemy do modulacji terapii falami ciśnieniowymi |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2913251A1 (de) * | 1979-04-03 | 1980-10-23 | Wolf Gmbh Richard | Vorrichtung zur zertruemmerung von nierensteinen o.dgl. |
EP0131654A1 (de) * | 1983-07-19 | 1985-01-23 | N.V. Optische Industrie "De Oude Delft" | Einrichtung zum berührungsfreien Zertrümmern von im Körper befindlichen steinigen Gegenständen mittels Schallschockwellen |
EP0240797A1 (de) * | 1986-04-01 | 1987-10-14 | Siemens Aktiengesellschaft | Stosswellenquelle mit erhöhtem Wirkungsgrad |
DE3817094A1 (de) * | 1988-04-18 | 1989-11-30 | Schubert Werner | Ankopplungs- und haftvorrichtung fuer stosswellenbehandlungsgeraete |
WO1993008749A1 (fr) * | 1991-10-31 | 1993-05-13 | Technomed International | Procede de reduction des phenomenes de destruction ou de lesion des surfaces se trouvant dans le champ de propagation d'ondes de pression de puissance, par l'emploi d'un agent diminuant la formation de bulles creees par les ondes de pression, et appareil de generation d'ondes de pression en comportant application |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3840077A1 (de) * | 1988-11-28 | 1990-05-31 | Wolf Gmbh Richard | Lithotriptor |
US5060634A (en) * | 1989-10-12 | 1991-10-29 | Richard Wolf Gmbh | Lithotriptor with reduced attenuation x-ray locating system |
DE4122590A1 (de) * | 1990-07-20 | 1992-01-23 | Siemens Ag | Druckimpulsgenerator mit variablem fokus |
DE4136004C1 (de) * | 1991-10-31 | 1993-01-28 | Siemens Ag, 8000 Muenchen, De | |
DE19622919C1 (de) * | 1996-06-07 | 1997-08-21 | Dornier Medizintechnik | Vorrichtung zur Ortung und Zertrümmerung von Konkrementen |
-
1995
- 1995-09-20 DE DE19534809A patent/DE19534809A1/de not_active Ceased
-
1996
- 1996-09-20 AT AT96938947T patent/ATE336947T1/de not_active IP Right Cessation
- 1996-09-20 JP JP9512201A patent/JPH11512323A/ja active Pending
- 1996-09-20 US US09/043,662 patent/US6059741A/en not_active Expired - Lifetime
- 1996-09-20 EP EP96938947A patent/EP0851741B1/de not_active Expired - Lifetime
- 1996-09-20 DE DE59611378T patent/DE59611378D1/de not_active Expired - Lifetime
- 1996-09-20 WO PCT/DE1996/001794 patent/WO1997010758A1/de active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2913251A1 (de) * | 1979-04-03 | 1980-10-23 | Wolf Gmbh Richard | Vorrichtung zur zertruemmerung von nierensteinen o.dgl. |
EP0131654A1 (de) * | 1983-07-19 | 1985-01-23 | N.V. Optische Industrie "De Oude Delft" | Einrichtung zum berührungsfreien Zertrümmern von im Körper befindlichen steinigen Gegenständen mittels Schallschockwellen |
EP0240797A1 (de) * | 1986-04-01 | 1987-10-14 | Siemens Aktiengesellschaft | Stosswellenquelle mit erhöhtem Wirkungsgrad |
DE3817094A1 (de) * | 1988-04-18 | 1989-11-30 | Schubert Werner | Ankopplungs- und haftvorrichtung fuer stosswellenbehandlungsgeraete |
WO1993008749A1 (fr) * | 1991-10-31 | 1993-05-13 | Technomed International | Procede de reduction des phenomenes de destruction ou de lesion des surfaces se trouvant dans le champ de propagation d'ondes de pression de puissance, par l'emploi d'un agent diminuant la formation de bulles creees par les ondes de pression, et appareil de generation d'ondes de pression en comportant application |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19914809B4 (de) * | 1999-03-31 | 2006-10-05 | Dornier Medtech Holding International Gmbh | Verwendung eines abbildenden Systems in einer Vorrichtung zur Erzeugung von fokussierten Stoßwellen |
EP2722012A1 (de) | 2012-10-18 | 2014-04-23 | Storz Medical Ag | Vorrichtung zur Stoßwellentherapie eines menschlichen Gehirns |
US10143483B2 (en) | 2012-10-18 | 2018-12-04 | Storz Medical Ag | Device and method for shock wave treatment of the human brain |
US11484724B2 (en) | 2015-09-30 | 2022-11-01 | Btl Medical Solutions A.S. | Methods and devices for tissue treatment using mechanical stimulation and electromagnetic field |
Also Published As
Publication number | Publication date |
---|---|
DE19534809A1 (de) | 1997-03-27 |
US6059741A (en) | 2000-05-09 |
JPH11512323A (ja) | 1999-10-26 |
ATE336947T1 (de) | 2006-09-15 |
EP0851741A1 (de) | 1998-07-08 |
EP0851741B1 (de) | 2006-08-23 |
DE59611378D1 (de) | 2006-10-05 |
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