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Simons Antoine P - - 2013
Next to severely decreased pump flow, hypovolemia in extracorporeal life support (ELS) can result in subatmospheric venous line pressure. Such pressure may lead to degassing and resultant gaseous microemboli (GME), with potential changes in neurological clinical outcome. CME activity resulting from degassing was investigated in relation to subatmospheric venous line ...
Lattimer Christopher R - - 2013
BACKGROUND: Graduated elastic compression (GEC) stockings have been demonstrated to reduce the morbidity associated with post-thrombotic syndrome. The ideal length or compression strength required to achieve this is speculative and related to physician preference and patient compliance. The aim of this study was to evaluate the hemodynamic performance of four ...
Ran Hai-Tao - - 2013
Objectives To prospectively assess changes in spleen stiffness and splenoportal venous flow before and after transjugular intrahepatic portosystemic shunt (TIPS) placement. Methods We prospectively evaluated spleen stiffness measured by the mean shear wave velocity with acoustic radiation force impulse imaging and the splenoportal venous velocity with color Doppler sonography in ...
Lai Jonathan - - 2013
Objective: To investigate the potential value of measuring mean arterial pressure (MAP), systolic (sBP) and diastolic (dBP) blood pressure at 30-33 weeks' gestation in the prediction of preeclampsia (PE) developing at or after 34 weeks. Methods: Screening study in singleton pregnancies at 30-33 weeks' gestation including 4,294 that were unaffected ...
Prekker Matthew E - - 2013
OBJECTIVE:: To determine the most accurate predictor of central venous pressure among three point-of-care venous ultrasound techniques. DESIGN:: Cross-sectional study. SETTING:: Medical ICU in an academic medical center. PATIENTS:: Convenience sample of 67 spontaneously breathing patients who had an intrathoracic central venous catheter to allow measurement of central venous pressure. ...
Kosmidou Ioanna - - 2013
Cryoballoon ablation (CBA) is an established therapy for atrial fibrillation (AF). Pulmonary vein (PV) occlusion is essential for achieving antral contact and PV isolation and is typically assessed by contrast injection. We present a novel method of direct pressure monitoring for assessment of PV occlusion. Transcatheter pressure is monitored during ...
Blaber Andrew P - - 2013
The goal of this study was to investigate the contribution of splanchnic volume redistribution and lower limb vasoconstriction in the maintenance of blood pressure during progressive central hypovolemia induced by graded lower body negative pressure (LBNP). It was hypothesized that splanchnic blood volume loss during LBNP would buffer decreases in ...
Zahir Muhammed - - 2013
Isolated giant varicocele has been reported with portal hypertension that results in abnormal communication between portal venous system and testicular vein venous system resulting in retrograde backflow of blood into the testicular venous system which leads to varicosity of the pampiniform plexuses. 65-year-old male with no past medical or surgical ...
Beggs Clive B - - 2013
Venous abnormalities contribute to the pathophysiology of several neurological conditions. This paper reviews the literature regarding venous abnormalities in multiple sclerosis (MS), leukoaraiosis, and normal-pressure hydrocephalus (NPH). The review is supplemented with hydrodynamic analysis to assess the effects on cerebrospinal fluid (CSF) dynamics and cerebral blood flow (CBF) of venous ...
Ajlan Abdulrazag M - - 2013
Spontaneous intracranial hypotension (SIH) is a syndrome of low pressure headache associated with low CSF pressure. The condition is generally considered benign but extreme cases of SIH can lead to changes in the level of consciousness. We describe a case in which alteration in the level of consciousness was prolonged ...
Zöllei Eva E Department of Anaesthesiology and Intensive Therapy, University of Szeged, Semmelweis u, 6, Szeged 6725, Hungary. - - 2013
In the assessment of hypovolemia the value of functional hemodynamic monitoring during spontaneous breathing is debated. The aim of our study was to investigate in spontaneously breathing subjects the changes in hemodynamic parameters during graded central hypovolemia and to test whether slow patterned breathing improved the discriminative value of stroke ...
Strohmaier Clemens A CA Department of Ophthalmology, University of Texas Health Science Center at San Antonio, San Antonio, - - 2013
Histological evidence suggests a role for the central nervous system in controlling episcleral venous pressure (EVP). Based on prior studies that identified candidate regions in the brain stem, the present study assessed the effect of electrical stimulation at the location of the superior salivatory nucleus (SSN) on EVP in rats. ...
Escobedo Liza Victoria S LV Department of Emergency Medicine, Beth Israel Medical Center, New York, NY, - - 2013
Traumatic brain injuries are common and costly to hospital systems. Most of the guidelines on management of traumatic brain injuries are taken from the Brain Trauma Foundation Guidelines. This is a review of the current literature discussing the evolving practice of traumatic brain injury. A literature search using multiple databases ...
Abdel-Sayed Saad - - 2012
A new plastic self-expanding Smartcanula (Smartcanula LLC, Lausanne, Switzerland) is designed for central insertion and prevention of caval collapse. The objective of our work is to assess the influence of the new design on atrial chatter. Caval collapse over the entire caval axis, right atrial, hepatic, renal vein, and iliac ...
F Gnanaraj Joseph - - 2012
Worsening renal function (WRF) during the treatment of acute decompensated heart failure (ADHF) occurs in up to a third of patients and is associated with worse survival. Venous congestion is increasingly being recognized as a key player associated with WRF in ADHF. Understanding the hemodynamic effects of venous congestion and ...
Wakerley Benjamin - - 2012
In many intracranial disease states, monitoring of intracranial pressure (ICP) is essential to evaluate response to the therapeutic measures as well as estimation of prognosis. Although, direct estimation of ICP is reliable, it is invasive and not possible in all patients. Transcranial Doppler (TCD) ultrasonography is a bedside and noninvasive ...
Tonnelier Alexandre - - 2012
BACKGROUND: Different filtering devices are used during mechanical ventilation to avoid dysfunction of flow and pressure transducers or for airborne micro7organisms containment. Water condensates resulting from the use of humidifiers, but also residual nebulization particles, may have a major influence on expiratory limb resistances. OBJECTIVES: To evaluate the influence of ...
Wang Zhiguo - - 2012
To study the anaphylaxis of Qingkailing injection (QI) and its components. Experimental anaphylactoid and allergic reactions were used. Changes in the behaviors of Beagles and serum levels of histamine, immunoglobulin (Ig)E, IgG, IgM, eosinophil cationic protein (ECP), and interleukin (IL)-4, as well as blood pressure, after injecting QI and its ...
Araos Joaquin D - - 2012
Objective-To evaluate the use of the oxygen content-based index, Fshunt, as an indicator of venous admixture ([Formula: see text]s/[Formula: see text]t) at various fractions of inspired oxygen (Fio(2)s) in anesthetized sheep undergoing Flung or 2-lung ventilation. Animals-6 healthy adult female sheep. Procedures-Sheep were anesthetized and administered 5 different Fio(2)s (0.21, ...
Persichini Romain - - 2012
Norepinephrine exerts venoconstriction that could increase both the mean systemic pressure and the resistance to venous return, but this has not yet been investigated in human septic shock. We examined the relative importance of both effects and the resulting effect on venous return when decreasing the dose of norepinephrine. Intensive ...
Schuren Jan J 3M Skin and Wound Care Division, Neuss, Germany - - 2012
Chronic venous insufficiency can lead to recalcitrant leg ulcers. Compression has been shown to be effective in healing these ulcers, but most products are difficult to apply and uncomfortable for patients, leading to inconsistent/ineffective clinical application and poor compliance. In addition, compression presents risks for patients with an ankle-brachial pressure ...
Dwyer Christopher M - - 2012
Object The authors examined the role of venous sinus obstruction in the etiology of idiopathic intracranial hypertension (IIH) by reviewing more than 200 MR venograms performed in suspected cases of IIH. Methods Individual MR venograms performed in cases of suspected IIH at the Children's Hospital at Westmead in Sydney, Australia, ...
Rohan C P-Y - - 2012
A patient-specific finite-element (FE) model of the human leg is developed to model the stress distribution in and around a vein wall in order to determine the biomechanical response of varicose veins to compression treatment. The aim is to investigate the relationship between the local pressure on the soft tissues ...
Caspersen C - - 2012
The purpose of this study was to assess immediate changes in the partial pressure of nitric oxide (NO) in exhaled gas (PE(NO) ) in healthy trained subjects who were acutely exposed to moderate altitude. One group of nine and another group of 20 healthy subjects were exposed to an ambient ...
Lurie F - - 2012
PurposeTo assess the variability of interface pressure and changes in this pressure over one month time interval under ready-to-use compression stockings. METHODS: Fifteen healthy volunteers with a broad range of sizes and shapes of the calves were included in final analysis. Each volunteer sequentially used six pairs of stockings daily ...
Van Canneyt K - - 2012
Although arterio-venous grafts (AVGs) are the second best option as long-term vascular access for hemodialysis, they suffer from complications caused by intimal hyperplasia, mainly located in vessel regions of low and oscillating wall shear stress. However, certain flow patterns in the bulk may reduce these unfavorable hemodynamic conditions. We therefore ...
Park Byung Hyun - - 2012
A pleated filter bag is often used to treat exhaust gas in many industrial applications, due to its fairly high dust collection efficiency and relatively low pressure drop. This work deals with the optimum pleating geometries of a pleated filter made with a newly developed PTFE/glass composite filter. It was ...
Rosique Marina Jf - - 2012
Objective:This study was carried out to determine high pressure and pulsatile flow perfusion effects on human saphenous vein (HSV) segments obtained from diabetic and non-diabetic patients.Methods:The veins were perfused with oxygenated Krebs solution for 3 h, with a pulsatile flow rate of 100 mL/min and pressures of 250 × 200 ...
Amaris Manuel M Medical College of Wisconsin DysphagiaInstitute and VA Medical Center, Division of Gastroenterologyand Hepatology, Medical College of Wisconsin, Milwaukee, WI, - - 2012
Vagal reflex initiated by esophageal stimulation and microaspiration can cause chronic cough in patients with gastroesophageal reflux disease (GERD). By raising intraabdominal pressure,cough can, in turn, predispose to GERD. The role of the upper esophageal sphincter (UES)in preventing esophagopharyngeal reflux during coughing is not well known. The aim of this ...
Ross Edward A - - 2012
Longstanding experimental evidence supports the role of renal venous hypertension in causing kidney dysfunction and "congestive renal failure." A focus has been heart failure, in which the cardiorenal syndrome may partly be due to high venous pressure, rather than traditional mechanisms involving low cardiac output. Analogous diseases are intra-abdominal hypertension ...
Anuszkiewicz A - - 2012
We report on the sensing characteristics of rocking filters fabricated in two microstructured fibers with enhanced polarimetric sensitivity to hydrostatic pressure. The filter fabricated in the first fiber shows a very high sensitivity to pressure ranging from 16.2 to 43.4 nm/MPa, depending on the resonance order and features an extremely ...
Wilson Michael R - - 2012
Ventilator-induced lung injury is a crucial determinant of the outcome of mechanically ventilated patients. Increasing numbers of mouse studies have identified numerous pathways and mediators that are modulated by ventilation, but it is conceptually difficult to reconcile these into a single paradigm. There is substantial variability in tidal volumes used ...
Camboni Daniele - - 2012
Veno-venous extracorporeal membrane oxygenation (vvECMO) conventionally requires the cannulation of two vessels. Here we report our initial experience with the "Wang-Zwische" (WZ) double-lumen cannula.In a group of n = 36 patients single venous cannulation for vvECMO was performed. A retrospective analysis was executed. A comparison of flow characteristics to standard ...
Todini A R - - 2012
Background. Imaging methods for diagnosis of pulmonary embolism (PE) are not available at small medical or rural centres as well as during night time. Herein, we evaluated the diagnostic value of brachial venous pressure measurement in the diagnosis of PE in patients with deep vein thrombosis. Materials and Methods. One-hundred ...
Saleem Mahmood M Institut of Chemical Engineering and Technology, University of the Punjab, Quaid-i-Azam Campus, Lahore-54590, Pakistan ; Graz University of Technology, Graz, - - 2012
Resistance parameters are essential for the prediction of pressure drop in bag filters. The reported values for limestone dust differ in magnitude and also depend on operating parameters. In this work, experimental data is provided from a pilot scale pulse-jet regenerated bag filter test facility for three types of needle ...
Recek Cestmir C (Retired from) Department of Surgery, University Hospital, Hradec Kralove, Czech - - 2012
A curious hemodynamic phenomenon emerging as a consequence of the treatment of varicose veins can offer a reasonable explanation why varicose vein and reflux recurrences occur tenaciously irrespective of the applied therapeutic procedure. Saphenous reflux is the most important hemodynamic factor in varicose vein disease: it is responsible for the ...
Dave Jaydev K JK Department of Radiology, Thomas Jefferson University, Philadelphia, PA 19107, - - 2012
The efficacy of using subharmonic emissions from Sonazoid microbubbles (GE Healthcare, Oslo, Norway) to track portal vein pressures and pressure changes was investigated in 14 canines using either slow- or high-flow models of portal hypertension (PH). A modified Logiq 9 scanner (GE Healthcare, Milwaukee, WI, USA) operating in subharmonic mode ...
Zhang Xia X Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City 37614, Tennessee, - - 2012
Cardiovascular collapse is the major factor contributing to the mortality of trauma-hemorrhage (T-H) patients. Toll-like receptors (TLRs) play a critical role in T-H-induced cardiac dysfunction. This study evaluated the role of TLR9 agonist, CpG-oligodeoxynucleotide (ODN) 1826, in cardiac functional recovery after T-H. Trauma-hemorrhage was induced in a murine model by ...
Loenneke Jeremy P - - 2013
The purpose was to investigate the acute effects of blood flow restriction (BFR) on arterial and venous hemodynamic parameters. Nine participants completed a 10-min time control (resting condition) and then a lower body BFR protocol. The protocol was five, 5-min bouts of restrictive cuff inflation with 3-min of deflation between ...
Fromy Bérengère - - 2012
Pressure-induced vasodilation (PIV) delays the decrease in cutaneous blood flow produced by local application of low pressure to the skin, a physiologically appropriate adjustment of local vasomotor function. Individuals without a normal PIV response have a high risk of ulceration. Here we demonstrate that acid-sensing ion channel 3 (Asic3) is ...
Ju Sheng - - 2012
High pressure is an important dimension for the emergent phenomena in transition metal oxides, including high-temperature superconductivity, colossal magnetoresistance, and magnetoelectric coupling. In these multiply correlated systems, the interplay between lattice, charge, orbital, and spin is extremely susceptible to external pressure. Magnetite (Fe3O4), as one of oldest known magnetic materials ...
Lai N Chin - - 2012
Congestive heart failure is associated with increased expression of pro-inflammatory cytokines, and the levels of these cytokines correlate with heart failure severity and prognosis. Chronic interleukin 6 (IL-6) stimulation leads to left ventricular (LV) hypertrophy and dysfunction, and deletion of IL-6 reduces LV hypertrophy after angiotensin II infusion. In this ...
Yan Tingting - - 2012
The effect of high pressure on the structural stability of oxamide has been investigated in a diamond anvil cell by Raman spectroscopy up to ~14.6 GPa and angle-dispersive X-ray diffraction (ADXRD) up to ~17.5 GPa. The discontinuity in Raman shifts around 9.6 GPa indicates a pressure-induced structural phase transition. This ...
Tumanov N A - - 2012
Tables 2 and 3 in the paper by Tumanov et al. [(2010), Acta Cryst. B66, 458-471] are corrected.
Van Huysse James W - - 2012
Neural precursor cell expressed and developmentally downregulated 4-2 protein (Nedd4-2) facilitates the endocytosis of epithelial Na channels (ENaCs). Both mice and humans with a loss of regulation of ENaC by Nedd4-2 have salt-induced hypertension. ENaC is also expressed in the brain, where it is critical for hypertension on a high-salt ...
Zhou Kangbin - - 2012
Metabolic syndrome (MS) is a combination of medical disorders that increase the risk of developing cardiovascular disease and diabetes. MS is associated with obesity, increased blood pressure, hyperlipidemia, and hyperglycemia. This study was designed to investigate the pharmacological profile of phentolamine, a nonselective α adrenergic receptor antagonist, in the prevention ...
Loudon R - - 2012
The name of Poynting is universally recognized for his development of the well-known expression for the flow of electromagnetic energy. Not so well known is Poynting's series of papers on radiation pressure, with 2011 marking the centenary of the last of his 15 publications on this topic. This paper reviews ...
Long D A - - 2012
Frequency-stabilized cavity ring-down spectroscopy measurements were performed in the P-branch of the O(2) A-band [b(1)Σ(g) (+) ← X (3)Σ(g) (-)(0,0)] near atmospheric pressure. Line mixing parameters and collision-induced absorption were quantified and reported. These measurements show qualitative differences with those taken at relatively high pressure (2 MPa-20 MPa). We also assess the ...
Damnjanović Z - - 2012
The study analysed the relationship between the incidence of idiopathic lower extremity deep vein thrombosis (DVT) and the location of the thrombus with changes in atmospheric pressure. During the two year period between May 2009 and April 2011, inclusively, 124 consecutive patients were diagnosed as having idiopathic lower extremity DVT ...
Saleem Mahmood M Institute of Chemical Engineering and Technology, University of the Punjab, Quaid-i-Azam Campus, 54590- Lahore, Pakistan ; Graz University of Technology, Graz, - - 2012
Bag filters are commonly used for fine particles removal in off-gas purification. There dust laden gas pervades through permeable filter media starting at a lower pressure drop limit leaving dust (called filter cake) on the filter media. The filter cakeformation is influenced by many factors including filtration velocity, dust concentration, ...
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