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"Phase angle"

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https://www.readbyqxmd.com/read/28096437/phase-angle-predicts-arterial-stiffness-and-vascular-calcification-in-peritoneal-dialysis-patients
#1
Margarida Sarmento-Dias, Carla Santos-Araújo, Rui Poínhos, Bruno Oliveira, Maria Sousa, Liliana S Silva, Isabel S Silva, Flora Correia, Manuel Pestana
♦ Objectives: Fluid overload (FO) is frequently present in peritoneal dialysis (PD) patients and is associated with markers of malnutrition, inflammation, and atherosclerosis/calcification (MIAC) syndrome. We examined the relationships in stable PD patients between phase angle (PhA) and the spectrum of uremic vasculopathy including vascular calcification and arterial stiffness and between PhA and changes in serum fetuin-A levels. ♦ Methods: Sixty-one stable adult PD patients were evaluated in a cross-sectional study (ST1)...
January 17, 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/28096060/nutritional-status-and-bioelectrical-phase-angle-assessment-in-adult-crohn-disease-patients-receiving-anti-tnf%C3%AE-therapy
#2
Sara Emerenziani, Livia Biancone, Michele Pier Luca Guarino, Paola Balestrieri, Elisa Stasi, Mentore Ribolsi, Maria Paola Rescio, Annamaria Altomare, Silvia Cocca, Francesco Pallone, Michele Cicala
BACKGROUND: Altered body composition is frequently observed in Crohn's disease (CD) patients. AIMS: To investigate the nutritional status, and the effect of different therapeutic regimes in adult CD patients. METHODS: Fat free mass (FFM) and BIA-derived phase angle (PhA) were assessed in 45 CD patients, 22 on conventional therapy (CT) and 23 on maintenance therapy with infliximab (MT). Nutritional status was also assessed in 12 CD patients before and following the induction protocol with infliximab...
December 30, 2016: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28087763/circadian-kinetics-of-cell-cycle-progression-in-adult-neurogenic-niches-of-a-diurnal-vertebrate
#3
Veronica Akle, Alexander J Stankiewicz, Vasili Kharchenko, Lili Yu, Peter V Kharchenko, Irina V Zhdanova
: The circadian system may regulate adult neurogenesis via intracellular molecular clock mechanisms or by modifying the environment of neurogenic niches, with daily variation in growth factors or nutrients depending on the animal's diurnal or nocturnal life-style. In a diurnal vertebrate, zebrafish, we studied circadian distribution of immunohistochemical markers of the cell division cycle (CDC) in five of the sixteen neurogenic niches of adult brain, the dorsal telencephalon, habenula, preoptic area, hypothalamus and cerebellum...
January 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28079435/bioelectrical-impedance-analysis-of-head-and-neck-cancer-patients-at-presentation
#4
Marie Lundberg, Pia Nikander, Katja Tuomainen, Helena Orell-Kotikangas, Antti Mäkitie
CONCLUSION: Finnish head and neck cancer (HNC) patients show signs of severe malnutrition already at presentation, measured by bioelectric impedance analysis (BIA). BIA may be a practical method to detect malnutrition, analyze body composition, and to identify high-risk patients in this population. OBJECTIVES: BIA is a validated method for evaluating body composition and detecting malnutrition. Low phase angle (PA) is associated with increased mortality and morbidity...
January 12, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28063860/could-objective-tests-be-used-to-measure-fatigue-in-patients-with-advanced-cancer
#5
Gustavo Schvartsman, Minjeong Park, Diane D Liu, Sriram Yennu, Eduardo Bruera, David Hui
CONTEXT: Assessment of cancer-related fatigue is currently based on patient-reported outcomes. We asked whether objective assessments such as muscle strength and nutritional markers can be used as surrogate measures of cancer-related fatigue. OBJECTIVE: We examined the association among three fatigue scales, muscle strength, and nutritional markers in patients with advanced cancer. METHODS: In this prospective study, we enrolled hospitalized cancer patients who had been seen in palliative care consultation at MD Anderson Cancer Center...
January 4, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/28048355/th-cd-207a-04-optimized-respiratory-gating-for-abnormal-breathers-in-pancreatic-sbrt
#6
W Campbell, M Miften, T Schefter, K Goodman, B Jones
PURPOSE: Pancreatic SBRT is uniquely challenging due to both the erratic/unstable motion of the pancreas and the close proximity of the radiosensitive small bowel. Respiratory gating can mitigate this effect, but the irregularity of motion severely affects traditional phase-based gating. The purpose of this study was to analyze real-time motion data of pancreatic tumors to optimize the efficacy and accuracy of respiratory gating, with the overall goal of enabling dose escalated pancreatic SBRT...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28042079/association-between-multi-frequency-phase-angle-and-survival-in-patients-with-advanced-cancer
#7
David Hui, Rony Dev, Lindsay Pimental, Minjeong Park, Maria Agustina Cerana, Diane Liu, Eduardo Bruera
CONTEXT: The ability to predict survival accurately has implications in clinical decision making. OBJECTIVE: We determined the association of phase angle obtained from multi-frequency bioelectric impedance analysis (MF-BIA) with overall survival in patients with advanced cancer. METHODS: We included consecutive patients with advanced cancer who had an outpatient palliative care consultation. MF-BIA assessed phase angle at three different frequencies (5 kHz/50 kHz/250 kHz) on each hemibody (right/left)...
December 29, 2016: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/28019677/chirality-specific-lift-forces-of-helix-under-shear-flows-helix-perpendicular-to-shear-plane
#8
Qi-Yi Zhang
Chiral objects in shear flow experience a chirality-specific lift force. Shear flows past helices in a low Reynolds number regime were studied using slender-body theory. The chirality-specific lift forces in the vorticity direction experienced by helices are dominated by a set of helix geometry parameters: helix radius, pitch length, number of turns, and helix phase angle. Its analytical formula is given. The chirality-specific forces are the physical reasons for the chiral separation of helices in shear flow...
December 26, 2016: Chirality
https://www.readbyqxmd.com/read/28018798/exact-solutions-for-unsteady-free-convection-flow-over-an-oscillating-plate-due-to-non-coaxial-rotation
#9
Ahmad Qushairi Mohamad, Ilyas Khan, Zulkhibri Ismail, Sharidan Shafie
BACKGROUND: Non-coaxial rotation has wide applications in engineering devices, e.g. in food processing such as mixer machines and stirrers with a two-axis kneader, in cooling turbine blades, jet engines, pumps and vacuum cleaners, in designing thermal syphon tubes, and in geophysical flows. Therefore, this study aims to investigate unsteady free convection flow of viscous fluid due to non-coaxial rotation and fluid at infinity over an oscillating vertical plate with constant wall temperature...
2016: SpringerPlus
https://www.readbyqxmd.com/read/28018114/low-phase-angle-is-associated-with-the-development-of-hepatic-encephalopathy-in-patients-with-cirrhosis
#10
Astrid Ruiz-Margáin, Ricardo Ulises Macías-Rodríguez, Javier Ampuero, Francisco Javier Cubero, Luis Chi-Cervera, Silvia L Ríos-Torres, Andrés Duarte-Rojo, Ángeles Espinosa-Cuevas, Manuel Romero-Gómez, Aldo Torre
AIM: Evaluate the association between phase angle and the development of hepatic encephalopathy in the long-term follow-up of cirrhotic patients. METHODS: This was a prospective cohort study. Clinical, nutritional and biochemical evaluations were performed. Mann-Whitney's U and χ(2) tests were used as appropriate. Kaplan-Meier curves and Cox proportional Hazards analysis were used to evaluate the prediction and incidence of hepatic encephalopathy. RESULTS: Two hundred and twenty were included; the most frequent etiology of cirrhosis was hepatitis C infection, 52% of the patients developed hepatic encephalopathy (18...
December 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28013296/thoracoabdominal-asynchrony-is-not-associated-with-oxyhemoglobin-saturation-in-recovering-premature-infants
#11
Colleen Brennan, Lara Ulm, Samuel Julian, Aaron Hamvas, Thomas Ferkol, Julie Hoffman, Laura Linneman, James Kemp
BACKGROUND: Recovering premature infants are at risk for hypoxemia and lack of synchrony between their rib cage and abdomen due to airflow obstruction and poor respiratory compliance. Thoracoabdominal asynchrony (TAA) is a useful marker of resistive and elastic lung properties. Whether TAA predicts oxygenation is unknown. OBJECTIVES: We investigated oxyhemoglobin saturation (SpO2%) and TAA (phase angle, φ) in preterm infants with/without high-humidity nasal cannula (HHNC)...
December 24, 2016: Neonatology
https://www.readbyqxmd.com/read/28000452/phase-angle-and-onodera-s-prognostic-nutritional-index-in-critically-ill-patients
#12
Karina Marques Vermeulen, Leilane Lilian Araújo Leal, Mariana Câmara Martins Bezerra Furtado, Sancha Helena de Lima Vale, Lúcia Leite Lais
INTRODUCTION: Assessing severity and nutritional prognosis in critical patients has become increasingly important in recent years, since these parameters are related to morbidity/mortality and used to guide therapeutic options. OBJECTIVE: Determine nutritional prognosis through the Phase Angle (PA) and Onodera's Prognostic Nutritional Index (OPNI) and its relationship with severity, hospitalization time and mortality of critically ill patients. METHODS: Descriptive cross-sectional study, involving adult patients hospitalized in an Intensive Care Unit (ICU)...
November 29, 2016: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/27999858/frailty-syndrome-visceral-adipose-tissue-and-frailty-in-patients-with-symptomatic-severe-aortic-stenosis
#13
M Pinheiro, J Mancio, G Conceição, W Ferreira, M Carvalho, A Santos, L Vouga, V Gama Ribeiro, A Leite-Moreira, I Falcão-Pires, N Bettencourt
BACKGROUND/OBJECTIVES: In patients with severe aortic stenosis (AS), frailty is a clinically relevant measure of increased vulnerability that should be included in the preoperative risk assessment. Bioelectrical impedance analysis (BIA) derived phase angle (PA) reflects cell membrane integrity and function. Few studies are available on the relative contribution of adiposity distribution on frailty, and about the influences of frailty and visceral obesity in PA value. Therefore, we aimed to evaluate associations among frailty, visceral fat depots and PA in patients with symptomatic severe AS...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/27973530/detecting-3d-vegetation-structure-with-the-galileo-space-probe-can-a-distant-probe-detect-vegetation-structure-on-earth
#14
Christopher E Doughty, Adam Wolf
Sagan et al. (1993) used the Galileo space probe data and first principles to find evidence of life on Earth. Here we ask whether Sagan et al. (1993) could also have detected whether life on Earth had three-dimensional structure, based on the Galileo space probe data. We reanalyse the data from this probe to see if structured vegetation could have been detected in regions with abundant photosynthetic pigments through the anisotropy of reflected shortwave radiation. We compare changing brightness of the Amazon forest (a region where Sagan et al...
2016: PloS One
https://www.readbyqxmd.com/read/27875280/malnutrition-identified-by-the-academy-of-nutrition-and-dietetics-and-american-society-for-parenteral-and-enteral-nutrition-consensus-criteria-and-other-bedside-tools-is-highly-prevalent-in-a-sample-of-individuals-undergoing-treatment-for-head-and-neck-cancer
#15
Urvashi Mulasi, David M Vock, Adam J Kuchnia, Gautam Jha, Naomi Fujioka, Venkatesh Rudrapatna, Manish R Patel, Levi Teigen, Carrie P Earthman
BACKGROUND: Using the Academy of Nutrition and Dietetics and American Society for Parenteral and Enteral Nutrition (Academy/ASPEN) Consensus malnutrition definition, we estimated malnutrition prevalence in a sample of individuals with head and neck cancer (HNC) and compared it with the Patient-Generated Subjective Global Assessment (PG-SGA). We also investigated the utility of the 50-kHz phase angle (PA) and 200-kHz/5-kHz impedance ratio (IR) to identify malnutrition. MATERIALS AND METHODS: Nineteen individuals (18 males, 1 female) scheduled to undergo chemoradiotherapy were seen at 5 time points during and up to 3 months after treatment completion...
October 7, 2016: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/27846267/interaction-between-the-stress-phase-angle-spa-and-the-oscillatory-shear-index-osi-affects-endothelial-cell-gene-expression
#16
Ronny Amaya, Limary M Cancel, John M Tarbell
Hemodynamic forces play an important role in the non-uniform distribution of atherosclerotic lesions. Endothelial cells are exposed simultaneously to fluid wall shear stress (WSS) and solid circumferential stress (CS). Due to variations in impedance (global factors) and geometric complexities (local factors) in the arterial circulation a time lag arises between these two forces that can be characterized by the temporal phase angle between CS and WSS (stress phase angle-SPA). Asynchronous flows (SPA close to -180°) that are most prominent in coronary arteries have been associated with localization of atherosclerosis...
2016: PloS One
https://www.readbyqxmd.com/read/27828487/joint-tracking-and-equalization-scheme-for-multi-polarization-effects-in-coherent-optical-communication-systems
#17
Yiqiao Feng, Linqian Li, Jiachuan Lin, Hengying Xu, Wenbo Zhang, Xianfeng Tang, Lixia Xi, Xiaoguang Zhang
We propose a joint multi-polarization-effect tracking and equalization method based on two extended Kalman filters, which can cope with state of polarization (SOP) tracing, polarization demultiplexing, equalization for polarization dependent loss (PDL) and polarization mode dispersion (PMD) in PDM-M-QAM coherent optical communication system. The mathematical model of the proposed method is given and analyzed in detail. Through simulation, the proposed method is proved to be very effective in a 28 Gbaud/s PDM-16QAM system...
October 31, 2016: Optics Express
https://www.readbyqxmd.com/read/27826005/comparative-evaluation-of-polycyanoacrylates
#18
Yoav Barkan, Mira Levinman, Ilana Veprinsky-Zuzuliya, Tsadok Tsach, Emmanuelle Merqioul, Galia Blum, Abraham J Domb, Arijit Basu
: Cyanoacrylate esters (CA) and their corresponding polymers (PolyCA) are used as general and medical adhesives, biodegradable carriers for controlled drug delivery, and as agents for fingerprint development in forensic science. Most reports of cyanoacrylate are on ethyl or 2-octyl cyanoacrylate ester with little attention to other esters. It is the objective of this study to determine the differences amongst cyanoacrylate esters regarding their synthesis, chemical characterization, hydrolytic degradation, and thermal and mechanical properties...
November 5, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27821919/bioelectrical-impedance-analysis-for-severe-stroke-patients-with-upper-extremity-hemiplegia
#19
Chanuk Yoo, Jaehyung Kim, Yeongae Yang, Jinsu Lee, Gyerok Jeon
[Purpose] This study is to analyze bioimpedance parameters and occupational assessment for severe stroke patients with upper extremity hemiplegia. [Subjects and Methods] Experimental subjects were 20 hemiplegic stroke patients receiving rehabilitation therapy between November to October, 2015. Prediction marker (PM), and phase angle (θ), a nd characteristic frequency (fc) were measured using bioelectrical impedance spectroscopy (MultiScan 5000). Bioelectrical impedance vector analysis (BIVA) was also obtained from the bioimpedance data...
October 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27812851/pineal-volume-and-evening-melatonin-in-young-people-with-affective-disorders
#20
Joanne S Carpenter, Amy C Abelmann, Sean N Hatton, Rébecca Robillard, Daniel F Hermens, Maxwell R Bennett, Jim Lagopoulos, Ian B Hickie
Affective disorders in young people have been associated with disruptions in circadian rhythms, including abnormalities in secretion of the pineal hormone melatonin. Previous research reports relationships between pineal gland volumes, melatonin secretion, and sleep-wake cycles, but the relationship between these factors has not been explored in affective disorders. This study aimed to characterize these factors and explore associations with mood symptoms and functioning in a sample of young people with affective disorders...
November 3, 2016: Brain Imaging and Behavior
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