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Hirota Masashi M 1Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, Japan 2Division of Collaborative Research for Next Generation Endoscopic Intervention, Center for Advanced Medical Engineering and Informatics, Osaka University, Osaka, - - 2014
Steady pressure automatically controlled endoscopy is a new insufflation concept, achieving a laparoscopy-like steady environment in the upper GI tract, recently reported in the esophagus. The purpose of this work was to validate the feasibility and safety of steady pressure automatically controlled endoscopy in the lower GI tract and to ...
Qi Xing-Shun XS Xing-Shun Qi, Dai-Ming Fan, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, 710032, Shaanxi Province, - - 2014
Hepatic venous pressure gradient (HVPG) is an independent predictor of variceal rebleeding in patients with cirrhosis. After pharmacological and/or endoscopic therapy, the use of a transjugular intrahepatic portosystemic shunt (TIPS) may be necessary in HVPG non-responders, but not in responders. Thus, HVPG measurement may be incorporated into the treatment algorithm ...
Zhang Renlin - - 2014
The current understanding of soot particle morphology in diesel engines and their dependency on the fuel injection timing and pressure is limited to those sampled from the exhaust. In this study, a thermophoretic sampling and subsequent transmission electron microscope imaging were applied to the in-flame soot particles inside the cylinder ...
Urrunaga Nathalie H NH Division of Gastroenterology and Hepatology, University of Maryland School of Medicine, 22 S. Greene Street, N3W156, Baltimore, MD 21201, - - 2014
Portal hypertensive gastropathy (PHG) and colopathy (PHC) are considered complications of portal hypertension. Both entities are clinically relevant because they may cause insidious blood loss or even acute massive gastrointestinal hemorrhage. Endoscopic evaluation is necessary for the diagnosis of PHG and PHC. The existence of different endoscopic criteria for PHG ...
Giannelli Valerio V Gastroenterology Department of Clinical Medicine, Sapienza University of Rome, Rome, Italy (Valerio Giannelli, Barbara Lattanzi, Manuela - - 2014
Since the original description of the effectiveness of β-blockers in lowering the portal pressure and therefore the risk of variceal bleeding, more than 500 articles in the English literature on the use of non selective β-blockers (NSBB) in cirrhosis have been published. The use of NSBB in pre-primary prophylaxis of ...
De Shubha S Cleveland Clinic Foundation, Urology, 9500 Euclid Ave, Buidling Q10, Cleveland, Ohio, United States, 44106, 2163336887 ; - - 2013
Introduction: The Thermedx Fluid Management System (TFMS) is an automated pressurized irrigation system that allows concurrent temperature control. Developed for use in multiple surgical specialties, it provides settings specific to several endoscopic urologic procedures. The objective of this study was to critically appraise the functional characteristics and precision of the ...
Codd Patrick J - - 2013
Object Endoscopy plays an increasingly important role in minimally invasive neurosurgery. Visual feedback from the endoscope tip helps the surgeon prevent unwanted tissue contact. However, critical feedback regarding tissue deformation and trauma from proximal endoscope components is currently unavailable. A system for force feedback along the endoscope length could provide ...
Song Y - - 2013
Background and study aims: Endoscopic surgical technology has been developing rapidly. Although several successful endoscopic closure devices have already been introduced, only a few of them have demonstrated improvements in closure strength and reproducibility over conventional endoscopic clip closures or hand sutures. The objective of this study was to test ...
Okada Takuya - - 2013
Background: In gastrointestinal surgery, anastomosis can result in various complications. Anastomosis is evaluated using classical examinations. The most reliable one is endoscopy, which provides direct information on the anastomosis and conduit. But the influence of endoscopy on anastomosis is uncertain. Methods: The internal pressure of a graft during endoscopy was ...
Topuz Ufuk - - 2013
The SRS(TM) Endoscopic Stapling System (Medigus, Tel Aviv, Israel) is a new tool capable of creating a totally endoscopic fundoplication, combined with an endoscope, endoscopic ultrasound and a surgical stapler. SRS(TM) endoscopic stapling for gastro-esophageal reflux disease is a minimally invasive, outpatient procedure, which requires general anesthesia with positive-pressure ventilation. ...
Kim Jin Nyoung - - 2012
Variceal hemorrhage is one of the major complications of cirrhosis and is associated with significant mortality and morbidity. The development of gastroesophageal varices and variceal hemorrhage is the most direct consequence of portal hypertension. Correlations between the hepatic venous pressure gradient (HVPG) and first variceal hemorrhage were examined. Patients with ...
Morrison Michele P - - 2012
A preponderance of literature supports the safety of office-based flexible endoscopic procedures of the upper aerodigestive tract; however, until recently there were no data regarding hemodynamic stability during these procedures. A recent study showed intraprocedure changes in patients' hemodynamic parameters, raising the concern that perhaps patients should be monitored during ...
Shi Ke-Qing - - 2012
OBJECTIVES: Transient elastography (TE), as a non-invasive method, has been studied for evaluation of portal hypertension in patients with chronic liver diseases (CLD) with variable results. We studied the performance of TE for detection of significant portal hypertension, oesophageal varices and large oesophageal varices using meta-analysis. METHODS: PubMed, the Cochrane ...
Rzoska Sylwester J - - 2012
Results of the extended Landau-de Gennes model analysis and experimental studies of the isotropic-nematic (I-N) and isotropic-smectic-A (I-SmA) phase transitions in rod-like liquid crystalline n-alkylcyanobiphenyls are presented. Experiments were carried out as a function of temperature and pressure using the static dielectric permittivity and its 'nonlinear' (strong electric field related) ...
Hövener Jan-Bernd - - 2012
Pure parahydrogen (pH(2) ) is the prerequisite for optimal pH(2) -based hyperpolarization experiments, promising approaches to access the hidden orders of magnitude of MR signals. pH(2) production on-site in medical research centers is vital for the proliferation of these technologies in the life sciences. However, previously suggested designs do not ...
Zhang Sheng - - 2012
To improve anaerobic sludge digestion efficiency, the effects of high-pressure homogenization (HPH) conditions on the anaerobic sludge digestion were investigated. The VS and TCOD were significantly removed with the anaerobic digestion, and the VS removal and TCOD removal increased with increasing the homogenization pressure and homogenization cycle number; correspondingly, the ...
Sonnleitner Andrea - - 2012
Hydrogen production via thermophilic dark fermentation is considered a sustainable way to produce renewable hydrogen. For industrial scale an optimisation of hydrogen production is of highest importance. The aim of this work was to evaluate induced bubble formation and applying reduced pressure as methods of removing produced hydrogen instead of ...
Barrera Olga - - 2012
This paper deals with fatigue life prediction of 316L stainless steel cardiac stents. Stents are biomedical devices used to reopen narrowed vessels. Fatigue life is dominated by the cyclic loading due to the systolic and diastolic pressure and the design against premature mechanical failure is of extreme importance. Here, a ...
Tommimatsu Takuji - - 2012
To investigate the relationship between maternal hyperventilation and fetal blood gas values and to estimate its possible association with fetal oxygenation, maternal transcutaneous partial pressure of carbon dioxide (tcP(CO2)) values were analyzed in association with umbilical venous P(CO2) (UVP(CO2)), umbilical venous partial pressure of oxygen (UVP(O2)), and umbilical venous oxyhemoglobin ...
Bajovic Bajo - - 2012
Pressure can be applied by high hydrostatic pressure, better known as high pressure processing (HPP), or by hydrodynamic pressure (HDP) in the form of shockwaves to alter quality parameters, such as shelf-life and texture of meat and meat products. The aim of this review is to give an overview of ...
Schultz A J - - 2012
BACKGROUND: Increasing urbanisation in sub-Saharan African countries is causing a rapid increase in cardiovascular disease. Evidence suggests that Africans have higher blood pressures and a higher prevalence of hypertension-related cardiovascular morbidity and mortality, compared to Caucasians. We investigated double product (systolic blood pressure×heart rate), a substantial measure of cardiac workload, ...
Whitson Matthew J MJ Department of Medicine, Division of Gastroenterology, Mount Sinai Medical Center, New York City, New York, - - 2012
Fatigue is an underestimated cause of underperformance among physicians. There is evidence that fatigue or other byproducts of production pressure may negatively influence the quality of colonoscopy. To investigate the practices and perceptions of U.S. endoscopists regarding the effect of production pressure on the performance of colonoscopy. We conducted a ...
Pauser Johannes - - 2012
To investigate the value of a built-in physical strain trainer for the monitoring of partial weight bearing with an ankle-foot orthosis. 12 healthy volunteers were asked to perform three trials. Plantar peak pressure values from normal gait (trial one) were defined as 100% (baseline). The following trials were performed with ...
Lubinsky Mark - - 2011
Interactions between selective factors (hypertension and tuberculosis) and environmental effects (vitamin D deficiency [VDD], temperature, and altitude) largely explain cystic fibrosis (CF) carrier geography. For VDD sequelae such as hypertension and tuberculosis vulnerability, clinical evidence of carrier protection is supported by indications that decreased CF arylsulfatase B activity suppresses tuberculosis, ...
Su Min - - 2011
Although pathogens and predators have been widely used as bio-control agents against problematic prey species, little has been done to examine the prevalence and aggregation of pathogens in spatially structured eco-epidemiological systems. Here, we present a spatial model of a predator-prey/host-parasite system based on pair approximation and spatially stochastic simulations, ...
Zolfaghari Parjam S - - 2011
Ventilator-associated pneumonia (VAP) is a major healthcare-associated complication with considerable attributable morbidity, mortality and cost. Inherent design flaws in the standard high-volume low-pressure cuffed tracheal tubes form a major part of the pathogenic mechanism causing VAP. The formation of folds in the inflated cuff leads to microaspiration of pooled oropharyngeal ...
Kreit E - - 2010
Reported are Laplace barriers consisting of arrayed posts or ridges that impart ∼100 to 1000 s of N/m(2) Laplace pressure for fluid confinement, but the Laplace pressure is also small enough such that the barriers are porous to electrowetting control. As a result, the barriers are able to provide electrowetting ...
Pertl Heidi - - 2010
To allow successful germination and growth of a pollen tube, mature and dehydrated pollen grains (PGs) take up water and have to adjust their turgor pressure according to the water potential of the surrounding stigma surface. The turgor pressure of PGs of lily (Lilium longiflorum) was measured with a modified ...
Van der Kloott William - - 2010
During World War I, military surgeons discovered that patients die from wound shock because their blood pressure falls catastrophically. William Maddock Bayliss produced experimental shock by bleeding anaesthetized cats, which lowers their blood pressure. He restored pressure by infusing salt solution containing enough gum acacia to generate the colloid osmotic ...
Kivistö Anniina T - - 2011
In hypersaline environments bacteria are exposed to a high osmotic pressure caused by the surrounding high salt concentrations. Halophilic microorganisms have specific strategies for balancing the osmotic pressure and surviving in these extreme conditions. Halophilic fermentative bacteria form taxonomically and phylogenetically a coherent group mainly belonging to the order Halanaerobiales. ...
Grime John M A - - 2010
Behaviors of a model interfacial system featuring the clustering of discrete, mobile wall charges and a counterion solution are investigated. The results demonstrate that even very small localized charge clusters produce significant effects for the osmotic pressure, effects that are not adequately represented in common colloidal models. We observe a ...
Magder Sheldon - - 2010
Fluid boluses are a key element of hemodynamic resuscitation, but overuse of fluids also can be harmful. It is thus important to understand how fluids actually improve clinical problems and how one can predict fluid responsiveness. It is also important to understand potential limitations of fluid therapy. Currently there is ...
Fahlgren Anna - - 2010
Unstable implants in bone become surrounded by an osteolytic zone. This is seen around loose screws, for example, but may also contribute to prosthetic loosening. Previous animal studies have shown that such zones can be induced by fluctuations in fluid pressure or flow, caused by implant instability. To understand the ...
Lorenz B - - 2010
We study the time dependency of the (average) interfacial separation between an elastic solid with a flat surface and a rigid solid with a randomly rough surface, squeezed together in a fluid. As an application we discuss fluid squeeze-out between a tire tread block and a road surface. Some implications ...
Johannessen Erik - - 2010
The growing pandemic of diabetes mellitus places a stringent social and economic burden on the society. A tight glycemic control circumvents the detrimental effects, but the prerogative is the development of new more effective tools capable of longterm tracking of blood glucose (BG) in vivo. Such discontinuous sensor technologies will ...
Reed Rolf K - - 2010
This review will summarize current knowledge on the role of the extracellular matrix (ECM) in general and on the interstitial fluid pressure (P(if)) in particular with regard to their importance in transcapillary exchange. The fluid volume in the interstitial space is normally regulated within narrow limits by automatic re-adjustment of ...
Li Wen - - 2010
Solute transport through bone plays an important role in tissue metabolism and cellular mechanotransduction. Due to limited diffusion within the mineralized bone matrix, both mechanical loading and vascular pressure have been proposed to drive interstitial fluid flow within the lacunar-canalicular system (LCS); thereby augmenting solute diffusion in bone. Although blood ...
Stokes Ian A - - 2010
The finite element method is used in biomechanics to provide numerical solutions to simulations of structures having complex geometry and spatially differing material properties. Time-varying load deformation behaviors can result from solid viscoelasticity as well as viscous fluid flow through porous materials. Finite element poroelastic analysis of rapidly loaded slow-draining ...
Bannerman Marcus N - - 2010
Hard-sphere molecular dynamics (MD) simulation results, with six-figure accuracy in the thermodynamic equilibrium pressure, are reported and used to test a closed-virial equation-of-state. This latest equation, with no adjustable parameters except known virial coefficients, is comparable in accuracy both to Pad? approximants, and to numerical parameterizations of MD data. There ...
Greene George W - - 2010
A compression cell designed to fit inside an NMR spectrometer was used to investigate the in situ mechanical strain response, structural changes to the internal pore structure, and the diffusion and flow of interstitial water in full-thickness cartilage samples as it was deforming dynamically under a constant compressive load (pressure). ...
Lin G - - 2010
In the last few years, a new type of glucose-sensitive hydrogel (GSH) has been developed that shrinks with increasing glucose concentration due to the formation of reversible crosslinks The first osmotic swelling pressure results measured for any member of this new class of GSH are reported, so that their suitability ...
Gardinier Joseph D - - 2010
Bone is capable of adapting its mass and structure under mechanical cues. Bone cells respond to various mechanical stimuli including substrate strain, fluid pressure, and fluid flow (shear stress) in vitro. Although tissue-level strains are well documented experimentally, microfluidic parameters around bone cells are quantified mainly through theoretical modeling. A ...
Wolf Andrea S - - 2010
Rapid fluid evacuation of the pneumonectomy space can cause ipsilateral mediastinal shift, contralateral lung hyperexpansion, compromised caval blood return and a precipitous drop in cardiac output. Conversely, rapid fluid accumulation can cause contralateral mediastinal shift with compression of the remaining lung and respiratory insufficiency. In this retrospective analysis, we evaluate ...
Ozmen Selahattin - - 2010
While certain parameters such as blood loss and serum lidocaine levels following liposuction have been well studied, fluid shifts between the intravascular and extravascular space have not. With the advent of large volume liposuction, prudent fluid management has become obligatory. Hence, the reason for our study.To test the impact of ...
Costanzo Maria Rosa - - 2010
More than one million hospitalizations occur annually in the US because of heart failure (HF) decompensation caused by fluid overload. Congestion contributes to HF progression and mortality. Apart from intrinsic renal insufficiency, venous congestion, rather than a reduced cardiac output, may be the primary hemodynamic factor driving worsening renal function ...
Bergomi Marzio - - 2010
The periodontal ligament (PDL) functions both in tension and in compression. The presence of an extensive vascular network inside the tissue suggests a significant contribution of the fluid phase to the mechanical response. This study examined the load response of bovine PDL under different pore pressure levels. A custom-made pressure ...
Costanzo Maria Rosa - - 2010
Ultrafiltration is the mechanical removal of fluid from the vasculature. Hydrostatic pressure is applied to blood across a semipermeable membrane to separate isotonic plasma water from blood. Because solutes in blood freely cross the semipermeable membrane, large amounts of fluid can be removed at the discretion of the treating physician ...
Di Somma Salvatore - - 2010
Evaluation of hydration state or water homeostasis is an important component in the assessment and treatment of critically ill patients in the emergency department (ED). The main purpose of ED physicians is to immediately distinguish between normal hydrated, dehydrated and hyperhydrated states. Fluid depletion may result from renal losses and ...
Woodruff D R - - 2010
Stomatal responses to leaf-to-air vapour pressure deficit (LVPD), leaf water potential components, and cuticular properties were characterized for Douglas-fir (Pseudotsuga menziesii) foliage collected from tree tops along a height gradient from 5 m to 58 m in order to explore height-related trends in stomatal sensitivity to LVPD and to investigate ...
Vanhecke Dimitri - - 2010
All preparation efforts of biological samples in electron microscopy are focused to preserve structures as close as possible to the native state. To achieve this goal with tissues, it is of advantage to have a very short time between excision and fixation. The most common approach is chemical fixation: cross-linking ...
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