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Xu Xiaofei - - 2014
We study the solvation of a single nanoparticle in poly(methyl methacrylate)--CO2 mixture at coexistence by using statistical classical density-functional theory. In the temperature range where there is triple-phase coexistence, the lowest solvation free energy occurs at the triple point pressure. Beyond the end point temperature of the triple line, and ...
Colloc'h Nathalie N CERVoxy team, ISTCT UMR 6301 CNRS, Centre Cyceron, Caen, France; ISTCT UMR 6301 CEA, DSV/I2BM, Caen, France; ISTCT UMR 6301 Université de Caen Basse-Normandie, Normandie Université, Caen, France. Electronic address: - - 2014
Urate oxidase from Aspergillus flavus is a 135 kDa homo-tetramer which has a hydrophobic cavity buried within each monomer and located close to its active site. Crystallographic studies under moderate gas pressure and high hydrostatic pressure have shown that both gas presence and high pressure would rigidify the cavity leading ...
Nemecek R R Division of General Dermatology, Department of Dermatology, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria, - - 2014
High pressure peaks might be a risk factor for the development of abdominal hernia. The course of abdominal pressure during extubation remains unclear. This preliminary study assessed the impact of two established extubation techniques. Twenty-four consecutive patients suffering from abdominal wall hernia with the indication for surgical treatment were included. ...
Shaw Janet M JM a Department of Exercise and Sport Science , University of Utah , Salt Lake City , - - 2014
Abstract Strenuous physical activity has been linked to pelvic floor disorders in women. Using a novel wireless intra-vaginal pressure transducer, intra-abdominal pressure was measured during diverse activities in a laboratory. Fifty-seven women performed a prescribed protocol using the intra-vaginal pressure transducer. We calculated maximal, area under the curve and first ...
Oren Liran L Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, 231 Albert Sabin Way, Cincinnati, OH 45267-0528, USA. Electronic address: - - 2014
Intraglottal velocity measurements were taken using particle image velocimetry and the corresponding estimates for the intraglottal pressure were computed using the pressure Poisson equation. Results from five canine larynges showed that when the flow separated from the divergent glottal walls during closing, the vortices that were formed in the separated ...
Basu Roshni R †Department of Microbiology & Immunology, Columbia University College of Physicians and Surgeons, New York, - - 2014
Yeast and other walled cells possess high internal turgor pressure that allows them to grow and survive in the environment. This turgor pressure however may oppose the invagination of the plasma membrane needed for endocytosis. Here, we study the effects of turgor pressure on endocytosis in the fission yeast Schizosaccharomyces ...
Aggarwal A K AK Department of Mathematics, Jaypee Institute of Information Technology, A-10, Sector 62, Noida 201307, - - 2014
The objective of this paper is to provide guidance for the design of the thick-walled cylinder made up of transversely isotropic material so that collapse of cylinder due to influence of internal and external pressure can be avoided. The concept of transition theory based on Lebesgue strain measure has been ...
Zhang Zhaojie Z Division of Gastroenterology and Hepatology, Tongji Hospital, Tongji University School of Medicine Shanghai 200065, - - 2014
Hepatopulmonary syndrome (HPS) is considered as a triad of chronic liver disease, pulmonary vascular ectasia and severe hypoxemia. The study aims to investigate the pathological mechanism of intra-abdominal pressure (IAP) in HPS and establish a novel mouse model. Fifty male ICR mice were randomly divided into experimental and control group, ...
Maddison Liivi L University of Tartu, Tartu University Hospital, Clinic of Anaesthesiology and Intensive Care, Puusepa 8, 51014 Tartu, - - 2014
Purpose. We hypothesize that intra-abdominal hypertension (IAH) is associated with the presence of anaerobic metabolism in the abdominal rectus muscle (RAM) tissue of critically ill patients. Methods. We included 10 adult, critically ill patients with intra-abdominal pressure (IAP) above 12 mmHg. Microdialysis catheters (CMA 60) were inserted into the RAM tissue. ...
Cheng Juntao - - 2013
Abdominal distension is common in critical illness. There is a growing recognition that intra-abdominal hypertension (IAH) may complicate non-surgical critical illness as well as after abdominal surgery. However, the pathophysiological basis of the injury to the intestinal mucosal barrier and its influence on the onset of abdominal compartment syndrome (ACS) ...
Wirkert Florian J FJ Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, - - 2014
A high-pressure cell for in situ X-ray reflectivity measurements of liquid/solid interfaces at hydrostatic pressures up to 500 MPa (5 kbar), a pressure regime that is particularly important for the study of protein unfolding, is presented. The original set-up of this hydrostatic high-pressure cell is discussed and its unique properties are demonstrated ...
Akonur Alp - - 2013
Icodextrin induces ultrafiltration (UF) during long-dwell exchanges by creating a difference in oncotic pressure between the peritoneal cavity and plasma; however, the mechanisms governing intra-patient and inter-patient variability in UF when icodextrin is used remain largely unexplained. In the present study, we show theoretically that differences in peritoneal residual volume ...
Horný Lukáš - - 2013
Elastic arteries are significantly prestretched in an axial direction. This property minimises axial deformations during pressure cycle. Ageing-induced changes in arterial biomechanics, among others, are manifested via a marked decrease in the prestretch. Although this fact is well known, little attention has been paid to the effect of decreased prestretch ...
Blaser Annika Reintam - - 2013
Intra-abdominal hypertension may contribute to a poor outcome. Whether limiting intra-abdominal pressure measurements to preselected at-risk patients allows for sufficient detection of intra-abdominal hypertension is unclear. We aimed to clarify whether expanded intra-abdominal pressure monitoring results in an increased detection rate of intra-abdominal hypertension. Retrospective observational study. General ICU of ...
Vlot John - - 2013
Determinants of working space in minimal access surgery have not been well studied. Using computed tomography (CT) to measure volumes and linear dimensions, we are studying the effect of a number of determinants of CO2 working space in a porcine laparoscopy model. Here we report the effects of pre-stretching of ...
Chang Mingtao - - 2013
To build a new and appropriate model of secondary intra-abdominal hypertension (IAH) in rats. A total of 32 female Sprague-Dawley rats were randomized into four groups. Group I: the rats were hemorrhaged to a mean arterial pressure (MAP) of 40 mm Hg for 1 h and portal hypertension was induced by partial ligation ...
Hejazi Mohamad M Department of Animal Science, Agriculture Faculty, Islamic Azad University, Khorramabad Branch, Khorramabad, IR - - 2013
During laparoscopy, insufflation of an inert gas in the peritoneal cavity creates a working space to facilitate surgery. The space should be large enough to facilitate surgery without increasing intra-abdominal pressure (IAP) over a threshold limit (usually 15 mm Hg). This experimental study was performed to evaluate the effects of ...
Cortes-Puentes Gustavo A - - 2013
To clarify the effect of progressively increasing intra-abdominal pressure on esophageal pressure, transpulmonary pressure, and functional residual capacity. Controlled application of increased intra-abdominal pressure at two positive end-expiratory pressure levels (1 and 10 cm H2O) in an anesthetized porcine model of controlled ventilation. Large animal laboratory of a university-affiliated hospital. ...
Hamdan A - - 2013
The determination of the initial pressure at the bubble wall created by a discharge in heptane for micro-gap conditions cannot be determined straightforwardly by modeling the time-oscillations of the bubble. The resolution of the Gilmore equation gives the same solutions beyond 1 μs typically for various sets of initial parameters, making ...
Shelmerdine Sc - - 2013
Laplace's law states that within a tubular structure, the transmural pressure required to cause distension is proportional to the wall thickness and surface wall tension, and inversely proportional to its radius. In other words, a structure with a larger radius and low surface tension requires less change in pressure to ...
Diallo S O - - 2013
We report a study of the effects of pressure on the diffusivity of water molecules confined in single-wall carbon nanotubes (SWNT) with average mean pore diameter of ∼16 Å. The measurements were carried out using high-resolution neutron scattering, over the temperature range 220≤T≤260 K, and at two pressure conditions: ambient and ...
Blagonravov M L - - 2013
The specific features of circadian rhythm of BP were investigated in freely moving male SHR rats using telemetry monitoring technique. BP was recorded in the abdominal aorta according to 24-h/4-month schedule. The data were obtained from 22, 26, 30, 34, and 38-week-old animals. Normotensive Wistar rats (22 weeks) served as ...
Moriyama S - - 2013
The present study aimed to determine the intra-abdominal pressure during front crawl swimming at different velocities in competitive swimmers and to clarify the relationships between stroke indices and changes in intra-abdominal pressure. The subjects were 7 highly trained competitive collegiate male swimmers. Intra-abdominal pressure was measured during front crawl swimming ...
Papparella Alfonso - - 2013
Introduction Carbon dioxide (CO2) used in laparoscopy evokes local and systemic effects. This study was designed to evaluate the histopathologic morphologic changes due to CO2 and air insufflation, at different pressure levels, on visceral and parietal peritoneum in rats.Materials and Methods A total of 56 rats were object of the ...
Lattuada Marco - - 2013
We hypothesized that mechanical ventilation per se increases abdominal edema and inflammation in sepsis and tested this in experimental endotoxemia. Thirty anesthetized piglets were allocated to one of five groups: healthy control pigs breathing spontaneously with continuous positive pressure of 5 cm H2O or mechanically ventilated with positive end-expiratory pressure ...
Malbrain Manu L N G - - 2013
This review will describe the definitions on intra-abdominal hypertension (IAH) and abdominal compartment syndrome (ACS). In order to understand these definitions the reader must be aware of the interactions between intra-abdominal pressure (IAP) and intra-abdominal volume (IAV), explaining why dramatic IAP increases can be observed in some patients related to ...
Dadpour Bita B Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, IR Iran ; Addiction Research Centre, Mashhad University of Medial Toxicology, Mashhad, IR - - 2013
Chronic lead exposure is known to be a risk factor for hypertension (HTN). No specific medication is recommended for the treatment of lead-induced hypertension (LIHTN). Our patient was a male admitted with the chief complaint of chronic abdominal pain. His whole blood lead level was reported to be 1961 µg/L. ...
Roberts Derek J - - 2013
BACKGROUND: Damage control laparotomy, or abbreviated initial laparotomy followed by temporary abdominal closure (TAC), intensive care unit resuscitation, and planned re-laparotomy, is frequently used to manage intra-abdominal bleeding and contamination among critically ill or injured adults. Animal data suggest that TAC techniques that employ negative pressure to the peritoneal cavity ...
Correa-Martín Laura - - 2013
BACKGROUND: The gastrointestinal system is the most sensitive to the presence of intra-abdominal hypertension. We aimed to assess the early prognostic value of gastric air tonometry as a predictor of inadequate splanchnic perfusion and determine its relation with abdominal perfusion pressure (APP). METHODS: Twenty-five Large White swine were used for ...
Park Du-Jin DJ Department of Physical Therapy, Graduate School of Catholic University of - - 2013
[Purpose] The aim of this study was to determine the appropriate pressure variation for performing a successful abdominal drawing-in maneuver (ADIM). The abdominal muscle thickness variations and contraction ratios were examined in relation to pressure variations using a Pressure Biofeedback Unit (PBU) during an ADIM in the supine position. [Methods] ...
Myrrha Mariana Alves Coutinho - - 2013
Chest wall volumes and breathing patterns of 13 male COPD patients were evaluated at rest and during inspiratory loaded breathing (ILB). The sternocleidomastoid (SMM) and abdominal muscle activity was also evaluated. The main compartment responsible for the tidal volume at rest and during ILB was the abdomen. During ILB patients ...
Albanese Valeria - - 2013
OBJECTIVE: To measure intra-abdominal pressure (IAP) in horses that crib and compare it with IAP in horses that do not have this vice. STUDY DESIGN: Cohort study. ANIMALS: Healthy cribbing horses (cribbing cohort, n = 8) and 8 healthy noncribbing horses (noncribbing cohort). METHODS: A microsensor catheter was introduced into the peritoneal ...
Ito Tetsuya T Department of Palliative Medicine, The University of Tokyo Hospital, Tokyo, - - 2014
Cell-Free and Concentrated Ascites Reinfusion Therapy (CART) is expected to improve patients' symptoms related to ascites. Use of a patient's own proteins in ascites might reduce the risk of infection. However, several reports have described that reinfusion of concentrated ascites might elevate body temperature. The aim of this study is ...
Goineau Sonia - - 2013
INTRODUCTION: Nausea and vomiting are common side effects of cancer chemotherapy. The ferret is a highly appropriate animal species to evaluate both early and delayed emetic events occurring hours and days after administration, respectively. If early emesis can be easily investigated in ferrets by direct observation, alternative methods are required ...
Liu X M - - 2013
The purpose of the present study was to evaluate whether pulse pressure variation (PPV) and stroke volume variation (SVV) can predict fluid responsiveness in patients with intra-abdominal hypertension (IAH) in either a supine or Trendelenburg position. Forty mechanically ventilated patients that exhibited IAH resulting from carbon dioxide insufflation (up to ...
Argyra Eriphyli - - 2013
BACKGROUND: Intra-abdominal hypertension (IAH) can have a profound impact on the cardiovascular system. We hypothesized that natriuretic peptides (Nt-pro-ANP and Nt-pro-BNP) are produced in response to the cardiovascular changes observed in an experimental model of IAH. MATERIALS AND METHODS: Eleven female pigs were enrolled in this study. Four experimental phases ...
Wang Miao - - 2013
Mechanically excellent native cellulose nanofibers that are cleaved from plant cell walls have been modified by functionalized few-walled carbon nanotubes for hybrid nanofiber/nanotube aerogels. They show elastic mechanical behavior in combination with reversible electrical response under compression allowing responsive conductivity and pressure sensing. The concept combines wide availability of nanocellulosics ...
Hamad Nadia M - - 2013
ABSTRACT: Activities thought to induce high intra-abdominal pressure (IAP), such as lifting weights, are restricted in women with pelvic floor disorders. Standardized procedures to assess IAP during activity are lacking and typically only focus on maximal IAP, variably defined. Our intent in this methods paper is to establish the best ...
Nygaard Ingrid E - - 2013
Many surgeons recommend rest and restricting activities to their patients after surgery. The aim of this review is to summarize the literature regarding types of activities gynecologic surgeons restrict and intra-abdominal pressure during specific activities and to provide an overview of negative effects of sedentary behavior (rest). We searched PubMed ...
Vlot John - - 2013
BACKGROUND: Adequate working space is a prerequisite for safe and efficient minimal access surgery. No objective data exist in literature about the effect of mechanical bowel preparation (MBP) on working space in laparoscopic surgery. We objectively measured this effect with computed tomography in a porcine laparoscopy model. METHODS: Using standardized ...
Makan Abdelhadi - - 2013
This study aimed to evaluate the effect of initial moisture content on the in-vessel composting under air pressure of organic fraction of municipal solid waste in Morocco in terms of internal temperature, produced gases quantity, organic matter conversion rate, and the quality of the final composts.For this purpose, in-vessel bioreactor ...
Barrett Elizabeth J - - 2013
To determine the effect of an abdominal support wrap and transrectal abdominal palpation on intra-abdominal pressures (IAPs) measured directly from the peritoneal space. Prospective, experimental study. A university-based equine research facility. Ten healthy adult horses, 5 males and 5 females. IAPs were measured through an intraperitoneal cannula zeroed at a ...
Lindekaer Astrid Listov - - 2013
Shoulder pain is a commonly reported symptom following laparoscopic procedures such as myomectomy or hysterectomy, and recent studies have shown that lowering the insufflation pressure during surgery may reduce the risk of post-operative pain. In this pilot study, a method is presented for measuring the intra-abdominal space available to the ...
Lalitha Rejani R Department of Medicine, School of Medicine, College of Health Sciences, Makerere University, P. O. Box: 7072, Kampala, - - 2013
A 23-year-old gravid Ugandan female at 26 weeks was admitted to the maternity ward with sweats, abdominal pain, feeling of apprehension and palpitations. A diagnosis of pre-eclampsia was made and treatment with magnesium sulphate initiated. She was later transferred to intensive care unit for monitoring and control of blood pressure. ...
Malbrain Manu Lng - - 2012
Monitoring hepatic blood flow and function might be crucial in treating critically ill patients. Intra-abdominal hypertension is associated with decreased abdominal blood flow, organ dysfunction, and increased mortality. The plasma disappearance rate (PDR) of indocyanine green (ICG) is considered to be a compound marker for hepatosplanchnic perfusion and hepatocellular membrane ...
Ahmadi-Noorbakhsh Siavash - - 2012
The intra-abdominal pressure (IAP) is an important clinical parameter that can significantly change during respiration. Currently, IAP is recorded at end-expiration (IAPee), while continuous IAP changes during respiration (ΔIAP) are ignored. Herein, a novel concept of considering continuous IAP changes during respiration is presented. Based on the geometric mean of ...
Pelosi Paolo - - 2012
ABSTRACT: Intra-abdominal hypertension is frequent in surgical and medical critically ill patients. Intra-abdominal hypertension has a serious impact on the function of respiratory as well as peripheral organs. In the presence of alveolar capillary damage, which occurs in acute respiratory distress syndrome (ARDS), intra-abdominal hypertension promotes lung injury as well ...
Vlot John - - 2012
BACKGROUND: Several factors may affect volume and dimensions of the working space in laparoscopic surgery. The precise impact of these factors has not been well studied. In a porcine model, we used computed tomographic (CT) scanning for measuring working space volume and distances. In a first series of experiments, we ...
Matthew Dwight - - 2012
Abdominal compartment syndrome is an under-recognized cause of acute kidney injury in critically ill patients. We report a case of a patient with severe obstructive lung disease who, while intubated for respiratory failure, developed abdominal compartment syndrome and oliguric acute kidney injury due to air-trapping and excessive auto-positive end-expiratory pressure ...
Hengy Baptiste - - 2012
To assess preload dependence, the variation of the plethysmographic waveform of pulse oximetry (ΔPOP) has been proposed as a surrogate of the pulse pressure variation (ΔPP). The aim of the study was to assess the ability of the pulse oximeter-derived plethysmographic analysis to accurately trend ΔPP in patients undergoing major ...
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