Othmar Wess, PhD
Physicist, since 1979 working in the field of medical shock wave application. Experienced in basic research in shock wave generation and focusing, product development and marketing at STORZ MEDICAL. Since 2010 consultant.
8574 Oberhofen, Switzerland

Fovargue D. et al., 2019: An experimentally-calibrated damage mechanics model for stone fracture in shock wave lithotripsy

Daniel Fovargue, Sorin Mitran, Georgy Sankin, Ying Zhang, Pei Zhong
Department of Mathematics, University of North Carolina, Chapel Hill, North Carolina.
Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina.

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Othmar Wess
Almost 40 years after the first extracorporeal shock wave lithotripsy in humans, the fracture mechanism is still under debate. The... Leggi tutto
Martedì, 28 Maggio 2019 08:31
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Wess O et al., 2018: Fragmentation of brittle material by shock wave lithotripsy. Momentum transfer and inertia: a novel view on fragmentation mechanisms

Othmar J. Wess, Juergen Mayer
Storz Medical AG, Lohstampfestrasse 8, 8274, Taegerwilen, Switzerland.

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Othmar Wess
Understanding the mechanism of shock wave fragmentation is of essential relevance for the design of a shock wave lithotripter. Saf... Leggi tutto
Lunedì, 15 Aprile 2019 08:40
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Li G et al, 2017: Evaluation of an experimental electrohydraulic discharge device for extracorporeal shock wave lithotripsy: Pressure field of sparker array.

Li G, Connors BA, Schaefer RB, Gallagher JJ, Evan AP.
School of Physics, Northeast Normal University, Changchun, 130024, People's Republic of China.
Department of Anatomy and Cell Biology, Indiana University School of Medicine, Medical Science Building, Room 0051, 635 Barnhill Drive, Indianapolis, Indiana 46202, USA.
Phoenix Science and Technology, C/O John Gallagher, 12 Van Buren Circle, Goffstown, New Hampshire 03045, USA.
Phoenix Science and Technology, 12 Van Buren Circle, Goffstown, New Hampshire 03045, USA.

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Othmar Wess
The myth is alive! The legendary glory of the original HM3-Lithotripter outshines all succeeding lithotripter developments since i... Leggi tutto
Giovedì, 03 Maggio 2018 08:03
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Hoy NY et al, 2016: Are We Banging Our Heads Against the Wall? The Effect of Treatment Head Wear on the Outcomes of Extracorporeal Shockwave Lithotripsy.

Hoy NY, Shapka L, Rudzinski J, Schuler TD, Wollin TA, Bochinski D, De SK.
Division of Urology, University of Alberta , Edmonton, Canada.

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Othmar Wess
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Martedì, 20 Giugno 2017 07:26
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Ohl SW et al, 2016: Lithotripter shock wave interaction with a bubble near various biomaterials.

Ohl SW, Klaseboer E, Szeri AJ, Khoo BC.
Institute of High Performance Computing, 1 Fusionopolis Way #16-16 Connexis, 138632, Singapore.

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Othmar Wess
Cavitation bubbles are considered playing an important role in shockwave lithotripsy. In vitro experiments show that bubbles colla... Leggi tutto
Martedì, 13 Giugno 2017 07:09
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Wang KG, 2016: Multiphase Fluid-Solid Coupled Analysis of Shock-Bubble-Stone Interaction in Shockwave Lithotripsy.

Wang KG
Department of Aerospace and Ocean Engineering, Virginia Tech, Blacksburg, 24061, VA, USA.

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Othmar Wess
The title of the paper indicates a direct impact on shockwave lithotripsy. Since cavitation and shockwave interaction with bubbles... Leggi tutto
Lunedì, 10 Aprile 2017 10:25
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Ghorbani M et al, 2016: Review on Lithotripsy and Cavitation in Urinary Stone Therapy

Ghorbani M, Oral O, Ekici S, Gozuacik D, Kosar A.

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Othmar Wess
This is a comprehensive review for all being interested in shock wave lithotripsy and the role of cavitation in urinary stone frag... Leggi tutto
Venerdì, 10 Marzo 2017 14:19
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Zhang Y et al, 2016: Effects of Stone Size on the Comminution Process and Efficiency in Shock Wave Lithotripsy.

Zhang Y, Nault I, Mitran S, Iversen ES, Zhong P.
Department of Mathematics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Department of Statistical Science, Duke University, Durham, North Carolina, USA.
Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA.

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Othmar Wess
This is a nice proof for what has been known or assumed for long. Comminution of a certain mass of stone material is more efficien... Leggi tutto
Lunedì, 06 Marzo 2017 07:27
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Wang JC, Zhou Y. 2016: Shifting the Split Reflectors to Enhance Stone Fragmentation of Shock Wave Lithotripsy.

Wang JC, Zhou Y
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.

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Othmar Wess
The authors start their study by the hypothesis that focal size has a decisive impact on lithotripsy performance. They follow the ... Leggi tutto
Martedì, 01 Novembre 2016 12:59
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Duryea AP et al, 2015: Removal of residual cavitation nuclei to enhance histotripsy erosion of model urinary stones.

Duryea AP, Roberts WW, Cain CA, Hall TL

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Othmar Wess
This is another paper of Duryea and co-workers being about cavitation nuclei and their impact on kidney stone treatment by histotr... Leggi tutto
Lunedì, 28 Settembre 2015 07:39
12852 Visite
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de Icaza-Herrera M et al, 2015: Combined short and long-delay tandem shock waves to improve shock wave lithotripsy according to the Gilmore-Akulichev theory.

de Icaza-Herrera M, Fernández F, Loske AM
Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Qro. 76230, Mexico.

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Othmar Wess
Cavitation plays an important role in extracorporeal shock wave lithotripsy. To achieve high fragmentation efficiency and low tiss... Leggi tutto
Lunedì, 22 Giugno 2015 11:07
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Duryea AP et al, 2015: Removal of residual nuclei following a cavitation event using low-amplitude ultrasound.

Duryea AP, Cain CA, Tamaddoni HA, Roberts WW, Hall TL.

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Othmar Wess
Cavitation bubbles may occur during shock wave lithotripsy and high energy ultrasound application. They may support stone fragment... Leggi tutto
Lunedì, 20 Aprile 2015 10:37
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Maxwell AD et al, 2015: Fragmentation of Urinary Calculi in Vitro by Burst Wave Lithotripsy.

Maxwell AD, Cunitz BW, Kreider W, Sapozhnikov OA, Hsi RS, Harper JD, Bailey MR, Sorensen MD
Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington;
Department of Acoustics, Physics Faculty, Moscow State University, Moscow, Russia.
Department of Urology, School of Medicine, University of Washington, Seattle, Washington

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Othmar Wess
Obviously, ultrasound seems to be a logic alternative instead of shock waves for stone fragmentation. Promising in vitro results a... Leggi tutto
Martedì, 10 Febbraio 2015 12:36
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Wang JC et al, 2014: Suppressing bubble shielding effect in shock wave lithotripsy by low intensity pulsed ultrasound.

Wang JC, Zhou Y
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore

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Othmar Wess
Gas bubbles and cavitation bubbles in particular have a significant impact on shock wave propagation. The energy of shock waves pa... Leggi tutto
Lunedì, 15 Dicembre 2014 12:30
12968 Visite
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Vlaisavljevich E et al, 2014: Histotripsy-induced cavitation cloud initiation thresholds in tissues of different mechanical properties

Vlaisavljevich E, Maxwell A, Warnez M, Johnsen E, Cain CA, Xu Z

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Othmar Wess
This article deals with cavitation and cavitation clouds generated by 1 MHz ultrasound pulses with respect to soft tissues oft dif... Leggi tutto
Mercoledì, 14 Maggio 2014 13:01
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Rad AJ et al, 2014: Investigation on the comparability of the light spot hydrophone and the fiber optic hydrophone in lithotripter field measurements

Rad AJ, Ueberle F, Krueger K
Department Life Sciences, Hamburg University of Applied Sciences, Hamburg 21033, Germany
Department Mechanical Engineering, Helmut Schmidt University, Hamburg 22043, Germany

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Othmar Wess
This paper digs into the problems of measuring shock wave pressure profiles. Contemporary lithotripters feature extreme high press... Leggi tutto
Lunedì, 12 Maggio 2014 12:59
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Kang G et al, 2014: Characterization of the shock pulse-induced cavitation bubble activities recorded by an optical fiber hydrophone

Kang G, Cho SC, Coleman AJ, Choi MJ
Interdisciplinary Postgraduate Program in Biomedical Engineering, Jeju National University, 102 Jejudaehakno, Jeju-Si, Jeju Special Self-Governing Province, 690-756, Republic of Korea
KORUST Limited, B-#716,717, Keumkang Penterium IT Tower, 282 Hagui-Ro, Dongan-Gu, Anyang-Si, Gyeonggi-Do, 431-810, Republic of Korea
Medical Physics Department, Guy's and St. Thomas' National Health Service Foundation Trust, Lambeth Palace Road, London, SE1 7EH, United Kingdom
Department of Medicine, Jeju National University, 102 Jejudaehakno, Jeju-Si, Jeju Special Self-Governing Province, 690-756, Republic of Korea

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Othmar Wess
Shock wave pressure measurements by optical fibre hydrophones (FOPH) usually provide pressure signals which are well correlated wi... Leggi tutto
Lunedì, 05 Maggio 2014 12:56
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Neisius A et al, 2014: Improving the lens design and performance of a contemporary electromagnetic shock wave lithotripter

Neisius A, Smith NB, Sankin G, Kuntz NJ, Madden JF, Fovargue DE, Mitran S, Lipkin ME, Simmons WN, Preminger GM, Zhong P
Division of Urologic Surgery and Department of Pathology, Duke University Medical Center, Durham, NC 27710

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Othmar Wess
This is the second paper dealing with a new lens design for an electromagnetic lithotripter. See also previous review: 70. Smith ... Leggi tutto
Lunedì, 28 Aprile 2014 12:53
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Neisius A et al, 2014: Improving the lens design and performance of a contemporary electromagnetic shock wave lithotripter

Neisius A, Smith NB, Sankin G, Kuntz NJ, Madden JF, Fovargue DE, Mitran S, Lipkin ME, Simmons WN, Preminger GM, Zhong P
Division of Urologic Surgery and Department of Pathology, Duke University Medical Center, Durham, NC 27710

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Othmar Wess
This is the second paper dealing with a new lens design for an electromagnetic lithotripter. See also previous review: 70. Smith ... Leggi tutto
Venerdì, 31 Gennaio 2014 14:40
13846 Visite
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Smith NB et al, 2013: A heuristic model of stone comminution in shock wave lithotripsy

Smith NB, Zhong P
Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA

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Othmar Wess
After more than 30 years the mechanism of stone fragmentation in lithotripsy is still not completely understood. Understanding bas... Leggi tutto
Martedì, 05 Novembre 2013 14:59
13040 Visite
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Fovargue D.E. et al, 2013: Experimentally validated multiphysics computational model of focusing and shock wave formation in an electromagnetic lithotripter

Fovargue DE, Mitran S, Smith NB, Sankin GN, Simmons WN, Zhong P
Department of Mathematics, University of North Carolina at Chapel Hill, 329 Phillips Hall, CB 3250, Chapel Hill, North Carolina 27599, USA

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Othmar Wess
Daniel Fovargue et al. developed a novel computational model to calculate the acoustic field of an electromagnetic lithotripter wi... Leggi tutto
Lunedì, 04 Novembre 2013 14:45
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Alibakhshi MA et al, 2013: Single-shot measurements of the acoustic field of an electrohydraulic lithotripter using a hydrophone array

Alibakhshi MA, Kracht JM, Cleveland RO, Filoux E, Ketterling JA
Department of Mechanical Engineering, Boston University, 110 Cummington Street, Boston, Massachusetts 02215, USA

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Othmar Wess
The extraordinary technical and medical importance of this paper is based on the type of measuring the shock wave field of an elec... Leggi tutto
Lunedì, 16 Settembre 2013 13:05
12708 Visite
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Zhou Y et al, 2012: Characteristics of the secondary bubble cluster produced by an electrohydraulic shock wave lithotripter

Zhou Y, Qin J, Zhong P
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore

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Othmar Wess
From a physical point of view the paper of Zhou, Qin and Zhong is very interesting since it investigates for the first time a uniq... Leggi tutto
Giovedì, 05 Aprile 2012 06:28
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Cárcamo JJ et al, 2011: Raman study of the shockwave effect on collagens

Cárcamo JJ, Aliaga AE, Clavijo RE, Brañes MR, Campos-Vallette MM
Laboratory of Vibrational Spectroscopy, Faculty of Sciences, University of Chile, PO Box 653, Santiago, Chile

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Othmar Wess
Shock waves are not only used for stone fragmentation but for many different diseases such as chronic pelvic pain syndrome, chroni... Leggi tutto
Giovedì, 17 Novembre 2011 00:00
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Kreider W et al, 2011: A reduced-order, single-bubble cavitation model with applications to therapeutic ultrasound

Kreider W, Crum LA, Bailey MR, Sapozhnikov OA
Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 Northeast 40th Street, Seattle, Washington 98105, USA

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Othmar Wess
This paper digs into details of bubble dynamics. Cavitation is considered an important mechanism of stone fragmentation. However, ... Leggi tutto
Martedì, 18 Ottobre 2011 08:27
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Pishchalnikov YA et al, 2011: Bubble proliferation in the cavitation field of a shock wave lithotripter

Pishchalnikov YA, Williams JC, McAteer JA
Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA

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Othmar Wess
SWL at low pulse repetition frequency (PRF) (0.5 -1 Hz vs. 2 Hz or higher) turned out to be more effective in clinical routine tre... Leggi tutto
Venerdì, 02 Settembre 2011 15:35
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Kobayashi K et al, 2011: Shock wave-bubble interaction near soft and rigid boundaries during lithotripsy: numerical analysis by the improved ghost fluid method

Kobayashi K, Kodama T, Takahira H
Division of Mechanical and Space Engineering, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan

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Othmar Wess
Cavitation is an important phenomenon in shock wave lithotripsy (SWL) and is considered a major mechanism for tissue damage as wel... Leggi tutto
Venerdì, 26 Agosto 2011 15:24
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