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Shock wave

O V Soldatova, A V Kubyshkin, A I Gordienko, I I Fomochkina
PURPOSE: to study changes of serum levels of nonspecific proteinases, their inhibitors, and proinflammatory cytokines during short term observation of patients with acute myocardial infarction (MI). MATERIALS AND METHODS: We included in this prospective short-term study 82 patients (27 with uncomplicated non-Q wave MI, 30 with Q-MI complicated by Killip class I-II acute left ventricular failure [ALVF], 17 with Q-MI complicated by Killip class III-IV ALVF, and 8 non-survivors due to development of cardiogenic shock) and 12 healthy controls...
March 2018: Kardiologiia
P Sprenger, M A Hoefer, G A El
A notion of hydrodynamic optical soliton tunneling is introduced in which a dark soliton is incident upon an evolving, broad potential barrier that arises from an appropriate variation of the input signal. The barriers considered include smooth rarefaction waves and highly oscillatory dispersive shock waves. Both the soliton and the barrier satisfy the same one-dimensional defocusing nonlinear Schrödinger (NLS) equation, which admits a convenient dispersive hydrodynamic interpretation. Under the scale separation assumption of nonlinear wave (Whitham) modulation theory, the highly nontrivial nonlinear interaction between the soliton and the evolving hydrodynamic barrier is described in terms of self-similar, simple wave solutions to an asymptotic reduction of the Whitham-NLS partial differential equations...
March 2018: Physical Review. E
Ri Liu, Weiwei Su, Jing Gong, Yu Zhang, Jianping Lu
PURPOSE: To assess the usefulness of factors unique to NCCT for the prediction of ESWL outcomes in patients with pancreatic duct stones. MATERIALS AND METHODS: We retrospectively evaluated 148 patients with multiple PDS who had undergone ESWL therapy. All patients received an examination for NCCT both before and after ESWL. The following parameters were measured and recorded: patient characteristics including sex and age; NCCT parameters including mean stone length, mean stone volumes before and after ESWL, mean value of CT attenuation, standard deviation of CT attenuation, variation coefficient of CT attenuation, skin-to-stone distance, and pancreatic duct diameter; ESWL outcome indexes including stone clearance rate calculated using the formula [Formula: see text], and the number of ESWL sessions...
May 15, 2018: Abdominal Radiology
Indranill Basu-Ray, Jing Liu, Xiaoming Jia, Michael Gold, Kenneth Ellenbogen, James DiNicolantonio, András Komócsi, András Vorobcsuk, Jitae Kim, Hamid Afshar, Wilson Lam, Nilesh Mathuria, Mehdi Razavi, Abdi Rasekh, Mohammad Saeed
OBJECTIVES: This study aims to conduct a meta-analysis comparing efficacy and safety outcomes between subcutaneous implantable cardioverter-defibrillator (S-ICD) and transvenous implantable cardioverter-defibrillator (TV-ICD). BACKGROUND: The S-ICD was developed to minimize complications related to the conventional TV-ICD. Direct comparison of clinical outcomes between the 2 devices has been limited by varying patient characteristics and definitions of complications with no randomized trials completed comparing these systems...
December 26, 2017: JACC. Clinical Electrophysiology
Joseph Y S Chan, Jacek Lelakowski, Francis D Murgatroyd, Lucas V Boersma, Jian Cao, Vladimir Nikolski, Griet Wouters, Mark C S Hall
OBJECTIVES: This study assessed the defibrillation efficacy of the substernal-lateral electrode configuration. BACKGROUND: Subcutaneous implantable cardioverter-defibrillators (ICDs) are regarded as alternatives to transvenous ICDs in certain subjects. However, substantially higher shock energy of up to 80 J may be required. Proposed is a new defibrillation method of placing the shock coil into the substernal space. METHODS: This prospective, nonrandomized, feasibility study was conducted in subjects scheduled for midline sternotomy or implant of ICD...
August 2017: JACC. Clinical Electrophysiology
F J Uribe, R M Velasco
We use the Navier-Stokes-Fourier constitutive equations to study plane shock waves in dilute gases. It is shown that the experimental information on the normalized density profiles can be fit by using the so-called soft sphere model, in which the viscosity and thermal conductivity are proportional to a power of the temperature.
April 2018: Physical Review. E
Jianchun Wang, Minping Wan, Song Chen, Chenyue Xie, Shiyi Chen
The statistics and scaling of compressible isotropic turbulence in the presence of large-scale shock waves are investigated by using numerical simulations at turbulent Mach number M_{t} ranging from 0.30 to 0.65. The spectra of the compressible velocity component, density, pressure, and temperature exhibit a k^{-2} scaling at different turbulent Mach numbers. The scaling exponents for structure functions of the compressible velocity component and thermodynamic variables are close to 1 at high orders n≥3. The probability density functions of increments of the compressible velocity component and thermodynamic variables exhibit a power-law region with the exponent -2...
April 2018: Physical Review. E
Wen Yi Huo, Zhichao Li, Yao-Hua Chen, Xufei Xie, Guoli Ren, Hui Cao, Shu Li, Ke Lan, Jie Liu, Yongsheng Li, Sanwei Li, Liang Guo, Yonggang Liu, Dong Yang, Xiaohua Jiang, Lifei Hou, Huabing Du, Xiaoshi Peng, Tao Xu, Chaoguang Li, Xiayu Zhan, Zhebin Wang, Keli Deng, Qiangqiang Wang, Bo Deng, Feng Wang, Jiamin Yang, Shenye Liu, Shaoen Jiang, Guanghui Yuan, Haijun Zhang, Baibin Jiang, Wei Zhang, Qianqian Gu, Zhibing He, Kai Du, Xuewei Deng, Wei Zhou, Liquan Wang, Xiaoxia Huang, Yuancheng Wang, Dongxia Hu, Kuixing Zheng, Qihua Zhu, Yongkun Ding
The first octahedral spherical hohlraum energetics experiment is accomplished at the SGIII laser facility. For the first time, the 32 laser beams are injected into the octahedral spherical hohlraum through six laser entrance holes. Two techniques are used to diagnose the radiation field of the octahedral spherical hohlraum in order to obtain comprehensive experimental data. The radiation flux streaming out of laser entrance holes is measured by six flat-response x-ray detectors (FXRDs) and four M-band x-ray detectors, which are placed at different locations of the SGIII target chamber...
April 20, 2018: Physical Review Letters
Kai-Hung Chen, Ching-Yi Shen, Yu-Jang Su
No abstract text is available yet for this article.
May 8, 2018: Gastroenterology
Cihan Bereket, Nilüfer Çakir-Özkan, Mehmet Emin Önger, Selim Arici
OBJECTIVE: Distraction osteogenesis (DO) is widely used treatment for the bone deformities. In addition extracorporeal shock wave therapy (ESWT) is a new perspective on noninvasive modalities of management of the bone regeneration. We examined the effects of 2 different single doses of ESWT on the consolidation period of DO of the rabbit mandible using stereological, radiological and immunohistochemical methods in the present study. METHODS: DO was performed unilaterally in the mandible of 18 New Zealand rabbits (6 months' old, weighing between 2...
May 8, 2018: Journal of Craniofacial Surgery
J Auvinet, P Graça, L Belkadi, L Petit, E Bonnivard, A Dettaï, W H Detrich, C Ozouf-Costaz, D Higuet
BACKGROUND: The importance of transposable elements (TEs) in the genomic remodeling and chromosomal rearrangements that accompany lineage diversification in vertebrates remains the subject of debate. The major impediment to understanding the roles of TEs in genome evolution is the lack of comparative and integrative analyses on complete taxonomic groups. To help overcome this problem, we have focused on the Antarctic teleost genus Trematomus (Notothenioidei: Nototheniidae), as they experienced rapid speciation accompanied by dramatic chromosomal diversity...
May 9, 2018: BMC Genomics
Nadeem Iqbal, Yashfeen Malik, Utbah Nadeem, Maham Khalid, Amna Pirzada, Mehr Majeed, Hajra Arshad Malik, Saeed Akhter
OBJECTIVE: To evaluate and compare the effectiveness of ureteroscopic (URS) pneumatic lithotripsy versus extracorporeal shock wave lithotripsy (ESWL) in the management of the proximal ureteral stones in terms of stone- free rates, complications and costs involved. MATERIAL AND METHODS: We included 200 patients in Group 1 who underwent ESWL and 200 patients in Group 2 who underwent URS intervention. We used Modulith SL X lithotripter 3rd generation Storz medical for ESWL group while Swiss pneumatic lithoclast was used to break the stone in the URS group...
May 2018: Turkish Journal of Urology
Robert M Geraghty, Patrick Jones, Thomas R W Herrmann, Omar Aboumarzouk, Bhaskar K Somani
INTRODUCTION: A rising incidence of kidney stone disease has led to an increase in ureteroscopy (URS) and shock wave lithotripsy (SWL). Our aim was to compare the cost of URS and SWL for treatment of stones. METHODS: A systematic review and meta-analysis based on Cochrane and PRISMA standards was conducted for all studies reporting on comparative cost of treatment between URS and SWL. The cost calculation was based on factual data presented in the individual studies as reported by the authors...
May 5, 2018: World Journal of Urology
Dongli Li, Andre Hallack, Robin O Cleveland, Antoine Jérusalem
Understanding the interaction between shock waves and tissue is critical for ad- vancing the use of shock waves for medical applications, such as cancer therapy. This work aims to study shock wave-cell interaction in a more realistic environment, relevant to in vitro and in vivo studies, by using 3D computational models of healthy and cancerous cells. The results indicate that for a single cell embedded in an extracellular environment, the cellular geometry does not influence significantly the membrane strain but does influence the von Mises stress...
May 1, 2018: Acta Biomaterialia
Ludmiła Daniłowicz-Szymanowicz, Damian Kaufmann, Katarzyna Rozwadowska, Maciej Kempa, Ewa Lewicka, Grzegorz Raczak
INTRODUCTION: The role of implantable cardioverter-defibrillator (ICD) placement in the primary prevention of sudden cardiac death (SCD) in all consecutive patients with left ventricular ejection fraction (LVEF) ≤ 35% is still a matter of hot debate due to the fact that the population of these patients is highly heterogeneous in terms of the SCD risk. Nevertheless, reduced LVEF is still the only established criterion during qualification of patients for ICD implantation in the primary prevention of SCD, therefore identification of persons with particularly high risk among patients with LVEF ≤35% is currently of lesser importance...
2018: PloS One
Mehran Razavipour, Masoud Shayesteh Azar, Mohamad Hosein Kariminasab, Salman Gaffari, Mehran Fazli
Background: Tennis elbow is one of the most often diagnosed pathology of the upper extremity and different treatments have been suggested for this disease, so this study was to investigate the effects of extracorporeal shock wave therapy in Tennis elbow treatment. Materials and Methods: We design a before and after clinical trial study (registry number: IRCT2012072610405N1) and investigated 40 patients with tennis elbow disease. All patients received 2000 pulses extracorporeal shock wave by piezoelectric device (WOLF Company) daily for one-week...
2018: Acta Informatica Medica: AIM
Cesar Khazen, Peter Magnusson, Johannes Flandorfer, Christoph Schukro
BACKGROUND: The aim of the study was to evaluate subcutaneous implantable cardioverter-defibrillator (S-ICD) patients with regard to underlying etiology, peri-procedural outcome, appropriate/inappropriate shocks, and complications during follow-up. METHODS: All patients who underwent S-ICD implantation from February 2013 to March 2017 at an academic hospital in Vienna were included. Medical records were examined and follow-up interrogations of devices were conducted...
May 2, 2018: Cardiology Journal
James F Kelly, Simone Marras, Xiaofeng Zhao, Robert J McGough
A nodal discontinuous Galerkin (DG) code based on the nonlinear wave equation is developed to simulate transient ultrasound propagation. The DG method has high-order accuracy, geometric flexibility, low dispersion error, and excellent scalability, so DG is an ideal choice for solving this problem. A nonlinear acoustic wave equation is written in a first-order flux form and discretized using nodal DG. A dynamic sub-grid scale stabilization method for reducing Gibbs oscillations in acoustic shock waves is then established...
April 2018: Journal of the Acoustical Society of America
J-E Franzkowiak, P Mercier, G Prudhomme, L Berthe
A roughened metallic plate, subjected to intense shock wave compression, gives rise to an expanding ejecta particle cloud. Photonic Doppler velocimetry (PDV), a fiber-based heterodyne velocimeter, is often used to track ejecta velocities in dynamic compression experiments and on nanosecond time scales. Shortly after shock breakout at the metal-vacuum interface, a particular feature observed in many experiments in the velocity spectrograms is what appear to be slow-moving ejecta, below the free-surface velocity...
April 10, 2018: Applied Optics
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