Source: http://www.google.com/patents/US5687729?dq=5958006
Timestamp: 2014-03-17 16:08:21
Document Index: 89330587

Matched Legal Cases: ['arts 1', 'art 1', 'arts 1', 'art 1', 'arts 1', 'arts 1']

Patent US5687729 - Source of therapeutic acoustic waves introducible into the body of a patient - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA source of therapeutic acoustic waves for minimally invasive treatment of internal body regions with the therapeutic acoustic waves has a number of source parts which emit the acoustic waves. In order to be able to apply the source easily in the inside of the body in a simple way, source parts are arranged...http://www.google.com/patents/US5687729?utm_source=gb-gplus-sharePatent US5687729 - Source of therapeutic acoustic waves introducible into the body of a patientAdvanced Patent SearchPublication numberUS5687729 APublication typeGrantApplication numberUS 08/493,218Publication dateNov 18, 1997Filing dateJun 20, 1995Priority dateJun 22, 1994Fee statusLapsedAlso published asDE4421795C1Publication number08493218, 493218, US 5687729 A, US 5687729A, US-A-5687729, US5687729 A, US5687729AInventorsUlrich SchaetzleOriginal AssigneeSiemens AktiengesellschaftExport CitationBiBTeX, EndNote, RefManPatent Citations (10), Referenced by (34), Classifications (26), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetSource of therapeutic acoustic waves introducible into the body of a patientUS 5687729 AAbstract A source of therapeutic acoustic waves for minimally invasive treatment of internal body regions with the therapeutic acoustic waves has a number of source parts which emit the acoustic waves. In order to be able to apply the source easily in the inside of the body in a simple way, source parts are arranged so as to be foldable in an introduction position giving the source a relatively small cross section as viewed in the introduction direction. After introduction into a patient the source parts are unfolded into a working position.
Sources of therapeutic acoustic waves of the above type are utilized, for example, for treating benign as well as malignant tissue modifications. Such sources thereby usually emit acoustic waves in the ultrasound range. The different therapy forms utilize the thermal effect of ultrasound waves. Temperatures in the range from 40 generated in the focus during the treatment in the case of focused acoustic waves, whereby the temperature is selected dependent on the type of pathological condition to be treated.
The source parts 1b and 1c are respectively pivotably connected to the source part 1a with two hinge-like articulations 2A and 2b. The source parts 1b and 1c are pivotable around respective axes A.sub.1 and A.sub.2 proceeding essentially parallel to the introduction direction illustrated by an arrow referenced E.
As shown in FIG. 5 on the basis of the example of the source part 1b shown without positive lens 6b, the source parts 1a-1c, i.e. their ultrasound transducers 5a-5c, are divided into a number of ultrasound transducer elements in the fashion of a liner array (linear arrangement). The ultrasound transducer elements are referenced 7a.sub.1 -7a.sub.n. In the exemplary embodiment set forth, moreover, the ultrasound transducers 5a-5c together with the backings 4a-4c and the positive lenses 6a-6c are identically fashioned; however, this need not necessarily be the case.
The ultrasound transducer elements of the source parts 1a-1c are driven during operation of the source 1 in the fashion of phased arrays (i.e., the arrangement is driven with a phase-offset) so that a common, approximately cigar-shaped focus zone arises for the ultrasound waves emanating from the ultrasound transducers 5a-5c. Dependent on the drive of the ultrasound transducer elements, the focus zone can be displaced relative to the source I within a region identified in FIG. 3 by shading. Three possible position of the focus zone FZ.sub.1 -FZ.sub.3 are indicated in FIG. 3. As used herein, focus zone means a region that surrounds the location of maximum acoustic pressure and that is limited by a three-dimensional -3 dB isobaric surface. This region is also referred to as the region of therapeutic action.
For the implementation of the treatment, the abdominal cavity is first filled with CO.sub.2 via a Veress needle 46. The CO.sub.2 insufflator is shown as a CO.sub.2 reservoir 32 and fine-pressure control 42. An endoscope 36 is subsequently applied. A rib is indicated in FIG. 6 and is referenced R. The endoscope 36 is guided into the abdominal cavity of the patient P through a trocar that is not shown in FIG. 6. The application of the source 1 also ensues through a trocar of a suitable size which is likewise not shown in FIG. 6.
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