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https://www.readbyqxmd.com/read/29153826/performance-evaluation-of-phase-angle-and-handgrip-strength-in-patients-undergoing-cardiac-surgery-prospective-cohort-study
#1
Taís Kereski da Silva, Ingrid Dalira Schweigert Perry, Janete Salles Brauner, Orlando Carlos Belmonte Weber, Gabriela Corrêa Souza, Sílvia Regina Rios Vieira
BACKGROUND AND AIMS: The phase angle (PA), derived from bioelectrical impedance analysis (BIA), has been interpreted as a cell membrane integrity indicator, while handgrip strength (HGS) has been used as a prognostic indicator in certain clinical situations, such as in cardiac, oncologic patients with renal disease, hemodialysis patients, HIV-positive patients, and liver disease patients. In addition to prognostic scores, body changes due to surgical procedures indicate the importance of measuring muscle function and cell integrity...
November 16, 2017: Australian Critical Care: Official Journal of the Confederation of Australian Critical Care Nurses
https://www.readbyqxmd.com/read/29148844/circadian-phase-circadian-period-and-chronotype-are-reproducible-over-months
#2
Thomas Kantermann, Charmane I Eastman
The timing of the circadian clock, circadian period and chronotype varies among individuals. To date, not much is known about how these parameters vary over time in an individual. We performed an analysis of the following five common circadian clock and chronotype measures: 1) the dim light melatonin onset (DLMO, a measure of circadian phase), 2) phase angle of entrainment (the phase the circadian clock assumes within the 24-h day, measured here as the interval between DLMO and bedtime/dark onset), 3) free-running circadian period (tau) from an ultradian forced desynchrony protocol (tau influences circadian phase and phase angle of entrainment), 4) mid-sleep on work-free days (MSF from the Munich ChronoType Questionnaire; MCTQ) and 5) the score from the Morningness-Eveningness Questionnaire (MEQ)...
November 17, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29146139/how-to-prevent-renal-cachexia-a-clinical-randomized-pilot-study-testing-oral-supplemental-nutrition-in-hemodialysis-patients-with-and-without-human-immunodeficiency-virus-infection
#3
Michael Zilles, Christoph Betz, Oliver Jung, Stefan Gauer, Renate Hammerstingl, Astrid Wächtershäuser, Thomas J Vogl, Helmut Geiger, Aida Asbe-Vollkopf, Rainer U Pliquett
OBJECTIVE: End-stage renal disease associates with catabolism and sarcopenia. Hypothetically, peroral supplemental nutrition over 6 months prevents catabolism in hemodialysis patients. DESIGN: Prospective randomized pilot study (ClinicalTrials.gov Identifier: NCT00687050). SUBJECTS: Twenty-three hemodialysis patients (15 males and 7 females) with or without human immunodeficiency virus (HIV) infection of 2 ambulatory hemodialysis centers...
November 14, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/29137731/combined-effects-of-phase-shift-and-power-distribution-on-efficiency-of-dual-high-frequency-sonochemistry
#4
Nicholas B Waldo, Chad D Vecitis
In an effort to increase the efficiency of sonochemical reactors, this study investigates a single-source, dual-high-frequency ultrasound reactor. Experiments were conducted with a variety of piezoelectric crystals and reactor components, and for each reactor design a range of power distributions and phase shifts between the two frequencies were evaluated. Certain dual-frequency configurations produced up to a threefold increase in sonochemical efficiency, while others yeilded no improvement over a single frequency...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29132737/discordance-between-bioelectrical-impedance-vector-analysis-and-the-new-espen-definition-of-malnutrition-for-the-diagnosis-of-hospital-malnutrition
#5
Edgar Dehesa-López, Jesús Israel Martínez-Felix, Arturo Ruiz-Ramos, Ximena Atilano-Carsi
BACKGROUND & AIMS: No universally accepted diagnostic criteria for malnutrition are available to date. The aim was to assess the concordance for the diagnosis of hospital malnutrition between the bioelectrical impedance vector analysis (BIVA) and the new definition of malnutrition proposed by the European Society for Clinical Nutrition and Metabolism (ESPEN). METHODS: A total of 140 adult hospitalized patients were included. The malnutrition risk was assessed by the Nutritional Risk Screening...
April 2017: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29130711/combined-assessment-of-nutritional-status-in-patients-with-peritoneal-dialysis-using-bioelectrical-impedance-vectors-and-malnutrition-inflammation-score
#6
Elia Muñoz-Pérez, María De Los Ángeles Espinosa-Cuevas, Paola Vanessa Miranda-Alatriste, Ricardo Correa-Rotter, Ximena Atilano-Carsi
BACKGROUND AND OBJECTIVE: Protein energy wasting (PEW) is a common syndrome in patients with chronic kidney disease, related to changes in hydration status, decreased food intake and inflammation. There are several tools for the assessment and diagnosis of such alterations. Bioimpedance vector analysis (BIVA) assess the state of nutrition and hydration, but not the inflammatory component, while the malnutrition inflammation score (MIS) comprises the inflammatory and nutritional factors, but not the state of hydration...
October 24, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29128293/test-retest-reliability-of-sit-to-stand-and-stand-to-sit-analysis-in-people-with-and-without-chronic-non-specific-low-back-pain
#7
Mohammad Reza Pourahmadi, Ismail Ebrahimi Takamjani, Shapour Jaberzadeh, Javad Sarrafzadeh, Mohammad Ali Sanjari, Rasool Bagheri, Elham Jannati
BACKGROUND: Sit-to-stand (STD) and stand-to-sit (SIT) analysis can provide information on functional independence in daily activities in patients with low back pain (LBP). However, in order for measurements to be clinically useful, data on psychometric properties should be available. OBJECTIVES: The main purpose was to investigate intra-rater reliability of STD and SIT tasks in participants with and without chronic non-specific LBP (CNLBP). The second purpose was to detect any differences in lumbar spine and hips sagittal plane kinematics and coordination between asymptomatic individuals and CNLBP patients during STD and SIT...
November 6, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/29111172/nutritional-counseling-with-or-without-systematic-use-of-oral-nutritional-supplements-in-head-and-neck-cancer-patients-undergoing-radiotherapy
#8
Emanuele Cereda, Silvia Cappello, Sara Colombo, Catherine Klersy, Ilaria Imarisio, Annalisa Turri, Marilisa Caraccia, Valeria Borioli, Teresa Monaco, Marco Benazzo, Paolo Pedrazzoli, Franco Corbella, Riccardo Caccialanza
BACKGROUND: To evaluate the benefit of oral nutritional supplements (ONS) in addition to nutritional counseling in head and neck cancer (HNC) patients undergoing radiotherapy (RT). METHODS: In a single-center, randomized, pragmatic, parallel-group controlled trial (ClinicalTrials.gov: NCT02055833; February 2014-August 2016), 159 newly diagnosed HNC patients suitable for to RT regardless of previous surgery and induction chemotherapy were randomly assigned to nutritional counseling in combination with ONS (N = 78) or without ONS (N = 81) from the start of RT and continuing for up to 3 months after its end...
October 27, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29095012/body-composition-of-patients-with-autism-spectrum-disorder-through-bioelectrical-impedance
#9
Kamila Castro, Larissa Slongo Faccioli, Diego Baronio, Carmem Gottfried, Ingrid Schweigert Perry, Rudimar Riesgo
BACKGROUND: Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by deficits in sociability, communication, and limited repertoire of interests and behaviors. OBJECTIVES: We aimed to investigate the nutritional status through bioelectrical impedance analysis (BIA) and antrophometrics variables in 63 ASD children and adolescents (10.5 ± 4.1 years; 81% male). MATERIALS AND METHODS: Anthropometric variables were weight, height, and waist circumference (WC); body composition (fat mass, fat free mass) and phase angle (PA) were obtained through BIA...
July 28, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29083245/assessment-and-impact-of-phase-angle-and-sarcopenia-in-palliative-cancer-patients
#10
Dana A Pérez Camargo, Silvia R Allende Pérez, Emma Verastegui Avilés, Mónica M Rivera Franco, Abelardo Meneses García, Ángel Herrera Gómez, Víctor I Urbalejo Ceniceros
Sarcopenia has been evaluated as a separate condition in cancer patients and as an important indicator of adverse outcomes. Muscle mass and phase angle are usually quantified by bioelectrical impedance analysis, due to its lower cost, and availability. The aim of this study was to assess the impact of sarcopenia, phase angle, and other characteristics on overall survival (OS) in palliative cancer patients at the National Cancer Institute of Mexico. We enrolled 628 patients (female, 59%). The most frequent disease was gastric cancer (39...
October 30, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/29079797/multi-wavelength-anomalous-diffraction-de-novo-phasing-using-a-two-colour-x-ray-free-electron-laser-with-wide-tunability
#11
Alexander Gorel, Koji Motomura, Hironobu Fukuzawa, R Bruce Doak, Marie Luise Grünbein, Mario Hilpert, Ichiro Inoue, Marco Kloos, Gabriela Kovácsová, Eriko Nango, Karol Nass, Christopher M Roome, Robert L Shoeman, Rie Tanaka, Kensuke Tono, Yasumasa Joti, Makina Yabashi, So Iwata, Lutz Foucar, Kiyoshi Ueda, Thomas R M Barends, Ilme Schlichting
Serial femtosecond crystallography at X-ray free-electron lasers (XFELs) offers unprecedented possibilities for macromolecular structure determination of systems prone to radiation damage. However, de novo structure determination, i.e., without prior structural knowledge, is complicated by the inherent inaccuracy of serial femtosecond crystallography data. By its very nature, serial femtosecond crystallography data collection entails shot-to-shot fluctuations in X-ray wavelength and intensity as well as variations in crystal size and quality that must be averaged out...
October 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/29073719/value-of-whole-breast-magnetic-resonance-elastography-added-to-mri-for-lesion-characterization
#12
Corinne Balleyguier, Aicha Ben Lakhdar, Ariane Dunant, Marie-Christine Mathieu, Suzette Delaloge, Ralph Sinkus
The purpose of this work was to assess the diagnostic value of magnetic resonance elastography (MRE) in addition to MRI to differentiate malignant from benign breast tumors, and the feasibility of performing MRE on the whole breast. MRE quantified biomechanical properties within the entire breast (50 slices) using an 11 min acquisition protocol at an isotropic image acquisition resolution of 2 × 2 × 2 mm(3) . Fifty patients were included. Finally, 43 patients (median age 52) with a suspect breast lesion detected by mammography and/or ultrasound were examined by MRI and MRE at 1...
October 26, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29073084/disruption-and-rescue-of-interareal-theta-phase-coupling-and-adaptive-behavior
#13
Robert M G Reinhart
Rescuing executive functions in people with neurological and neuropsychiatric disorders has been a major goal of psychology and neuroscience for decades. Innovative computer-training regimes for executive functions have made tremendous inroads, yet the positive effects of training have not always translated into improved cognitive functioning and often take many days to emerge. In the present study, we asked whether it was possible to immediately change components of executive function by directly manipulating neural activity using a stimulation technology called high-definition transcranial alternating current stimulation (HD-tACS)...
October 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29070856/directional-mass-transport-in-an-atmospheric-pressure-surface-barrier-discharge
#14
A Dickenson, Y Morabit, M I Hasan, J L Walsh
In an atmospheric pressure surface barrier discharge the inherent physical separation between the plasma generation region and downstream point of application reduces the flux of reactive chemical species reaching the sample, potentially limiting application efficacy. This contribution explores the impact of manipulating the phase angle of the applied voltage to exert a level of control over the electrohydrodynamic forces generated by the plasma. As these forces produce a convective flow which is the primary mechanism of species transport, the technique facilitates the targeted delivery of reactive species to a downstream point without compromising the underpinning species generation mechanisms...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29067673/a-few-remarks-on-spatial-interference-in-visual-stimuli
#15
Bernt Christian Skottun
Many vision experiments, e.g., tests of masking and visual crowding, involve the effect of adding a second stimulus to an initial one. The effects of such additions are generally considered in terms of physiological mechanisms and the possibility of interference in the stimuli is generally not considered. In the present study, interference between two stimuli was assessed by comparing the sum of amplitudes in the combined stimulus to the sums of the amplitudes in the two stimuli determined separately. With this approach, evidence for interference was found...
October 24, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/29060219/using-impedance-to-track-fracture-healing-rates-in-mice-in-vivo-a-pilot-study
#16
Monica C Lin, Diane Hu, Frank Yang, Safa T Herfat, Chelsea S Bahney, Meir Marmor, Michel M Maharbiz
Fracture injuries are highly prevalent worldwide, with treatment of problematic fractures causing a significant burden on the U.S. healthcare system. Physicians typically monitor fracture healing by conducting physical examinations and taking radiographic images. However, nonunions currently take over 6 months to be diagnosed because these techniques are not sensitive enough to adequately assess fracture union. In this study, we display the utility of impedance spectroscopy to track different healing rates in a pilot study of an in vivo mouse tibia fracture model...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29044737/chronic-bmy7378-treatment-alters-behavioral-circadian-rhythms
#17
Jhenkruthi Vijaya Shankara, Angélique Orr, Richelle Mychasiuk, Michael C Antle
The mammalian circadian clock is synchronized to the day : night cycle by light. Serotonin modulates the circadian effects of light, with agonists inhibiting response to light and antagonists enhancing responses to light. A special class of serotonergic compounds, the mixed 5-HT1A agonist/antagonists, potentiates light-induced phase advances by up to 400% when administered acutely. In this study, we examine the effects of one of these mixed 5-HT1A agonist/antagonists, BMY7378, when administered chronically...
October 17, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29029340/circadian-phase-and-phase-angle-disorders-in-primary-insomnia
#18
Erin E Flynn-Evans, Julia A Shekleton, Belinda Miller, Lawrence J Epstein, Douglas Kirsch, Lauren A Brogna, Liza M Burke, Erin Bremer, Jade M Murray, Philip Gehrman, Shantha M W Rajaratnam, Steven W Lockley
Objectives: We aimed to identify the prevalence of circadian phase and phase angle abnormalities in patients with insomnia. Methods: We conducted a cross-sectional, multicenter study at three sleep laboratories in the United States and Australia. Patients with insomnia and healthy control participants completed a sleep log for seven days. Circadian phase was assessed from salivary Dim Light Melatonin Onset (DLMO) time during a 12-hour laboratory visit. Results: Seventy-nine patients meeting the Research Diagnostic Criteria for Primary, Psychophysiological, Paradoxical, and/or Idiopathic Childhood Insomnia (46F, 35...
October 3, 2017: Sleep
https://www.readbyqxmd.com/read/29024874/electrical-impedance-myography-changes-after-incomplete-cervical-spinal-cord-injury-an-examination-of-hand-muscles
#19
Le Li, Henry Shin, Argyrios Stampas, Xiaoyan Li, Ping Zhou
OBJECTIVE: This study was to apply the newly developed electrical impedance myography (EIM) technique to examine hand muscles in patients with an incomplete cervical spinal cord injury (SCI). METHODS: EIM was performed on the thenar, hypothenar, and first dorsal interosseous (FDI) muscles of SCI (n=16) and age-matched healthy control (n=18) subjects. By sending low intensity and high frequency current through the skin and measuring the consequent voltage, EIM estimates the major impedance parameters, which include resistance (R), reactance (X) and phase angle (θ)...
September 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28988445/effect-of-cochlear-implantation-on-middle-ear-function-a-three-month-prospective-study
#20
Joseph D Wasson, Luke Campbell, Scott Chambers, Amy Hampson, Robert J S Briggs, Stephen J O'Leary
OBJECTIVES/HYPOTHESIS: To determine if cochlear implantation has a delayed effect on the middle ear conductive hearing mechanism by measuring laser Doppler vibrometry (LDV) of the tympanic membrane (TM) in both implanted and contralateral control ears preoperatively and 3 months postoperatively, and then comparing the relative change in LDV outcome measures between implanted and control ears. STUDY DESIGN: Prospective cohort study. METHODS: Eleven preoperative adult unilateral cochlear implant recipients in previously unoperated ears with normal anatomy and aerated temporal bones were included in this study...
October 8, 2017: Laryngoscope
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