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https://www.readbyqxmd.com/read/29351494/factors-associated-with-sarcopenia-in-patients-with-colorectal-cancer
#1
Bianca Umbelino de Souza, Nilian Carla Silva Souza, Renata Brum Martucci, Viviane Dias Rodrigues, Nivaldo Barroso de Pinho, Maria Cristina Gonzalez, Carla Maria Avesani
Introduction; Sarcopenia are frequently observed in cancer patients and was associated with poor prognosis. Objectives; to determine the association of nutritional status, body composition, and clinic parameters with sarcopenia in patients with colorectal cancer (CRC). Methods; We conducted a cross-sectional study of 197 patients with CRC. The sarcopenia elements, including lumbar skeletal muscle index (SMI), handgrip strength, and gait speed were measured. The SMI was assessed by computed tomography at third lumbar vertebra...
January 19, 2018: Nutrition and Cancer
https://www.readbyqxmd.com/read/29346957/double-transition-in-a-model-of-oscillating-percolation
#2
Sumanta Kundu, Amitava Datta, S S Manna
Two distinct transition points have been observed in a problem of lattice percolation studied using a system of pulsating disks. Sites on a regular lattice are occupied by circular disks whose radii vary sinusoidally within [0,R_{0}] starting from a random distribution of phase angles. A lattice bond is said to be connected when its two end disks overlap with each other. Depending on the difference of the phase angles of these disks, a bond may be termed as dead or live. While a dead bond can never be connected, a live bond is connected at least once in a complete time period...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29337009/coherence-and-interlimb-force-control-effects-of-visual-gain
#3
Nyeonju Kang, James H Cauraugh
Neural coupling across hemispheres and homologous muscles often appears during bimanual motor control. Force coupling in a specific frequency domain may indicate specific bimanual force coordination patterns. This study investigated coherence on pairs of bimanual isometric index finger force while manipulating visual gain and task asymmetry conditions. We used two visual gain conditions (low and high gain = 8 and 512 pixels/N), and created task asymmetry by manipulating coefficient ratios imposed on the left and right index finger forces (0...
January 11, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29330426/glucose-independent-segmental-phase-angles-from-multi-frequency-bioimpedance-analysis-to-discriminate-diabetes-mellitus
#4
Min-Ho Jun, Soochan Kim, Boncho Ku, JungHee Cho, Kahye Kim, Ho-Ryong Yoo, Jaeuk U Kim
We investigated segmental phase angles (PAs) in the four limbs using a multi-frequency bioimpedance analysis (MF-BIA) technique for noninvasively diagnosing diabetes mellitus. We conducted a meal tolerance test (MTT) for 45 diabetic and 45 control subjects stratified by age, sex and body mass index (BMI). HbA1c and the waist-to-hip-circumference ratio (WHR) were measured before meal intake, and we measured the glucose levels and MF-BIA PAs 5 times for 2 hours after meal intake. We employed a t-test to examine the statistical significance and the area under the curve (AUC) of the receiver operating characteristics (ROC) to test the classification accuracy using segmental PAs at 5, 50, and 250 kHz...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29324061/the-prediction-of-deterioration-of-nutritional-status-during-chemoradiation-therapy-in-patients-with-esophageal-cancer
#5
Sofia C M Rietveld, Jill E Witvliet-van Nierop, Karen Ottens-Oussoren, Donald L van der Peet, Marian A E de van der Schueren
Patients with esophageal cancer are at high risk of developing malnutrition during neoadjuvant chemoradiation therapy (CRT), which in turn is associated with postoperative morbidity. The aim of the study is to explore whether parameters of a complete pre-treatment nutritional status may predict deterioration of nutritional status during CRT in patients with esophageal cancer. In this prospective cohort study, 101 patients with esophageal cancer treated with CRT were included. Data of patient characteristics, tumor classification, performance score, %weight change, body mass index, fat (free) mass index, phase angle, handgrip strength, energy- and protein intake, and use of (additional) dietary supplements were collected...
January 11, 2018: Nutrition and Cancer
https://www.readbyqxmd.com/read/29316025/impedance-spectroscopy-measurements-as-a-tool-for-distinguishing-different-luminal-content-during-bolus-transit-studies
#6
A Ruiz-Vargas, R Mohd Rosli, A Ivorra, J W Arkwright
BACKGROUND: Intraluminal electrical impedance is a well-known diagnostic tool used to study bolus movement in the human esophagus. However, it is use in the human colon it is hindered by the fact that the content cannot be controlled and may include liquid, gas, solid, or a mixture of these at any one time. This article investigates the use of complex impedance spectroscopy to study different luminal content (liquid and gas). METHODS: An excised section of guinea pig proximal colon was placed in an organ bath with Krebs solution at 37°C and a custom built bioimpedance catheter was placed in the lumen...
January 8, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29299224/the-effectiveness-of-functional-electrical-stimulation-fes-in-on-off-mode-for-enhancing-the-cycling-performance-of-team-phoenix-at-2016-cybathlon
#7
Kenry Wc Leung, Raymond Ky Tong, Xiaojun Wang, Ginny Ty Lee, Peter Mk Pang, H W Wai, H C Leung
In this study we designed a Functional Electrical Stimulation (FES) trike for a female subject with spinal cord injury to exercise her lower limbs and improve her lower limb muscle condition for attending the 2016 Cybathlon FES bike competition. Our FES pilot was the only female participant, in the FES cycling competition and she rode for Team Phoenix from the Chinese University of Hong Kong. Due to the weakness of muscles in the lower limb of the subject, and due to scoliosis over her thoracolumbar aéra, the mechanical structure of the trike had to be tailor-made to ensure she sat on the bike in a safe and secure position...
December 5, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29289338/full-order-observer-for-direct-torque-control-of-induction-motor-based-on-constant-v-f-control-technique
#8
Narongrit Pimkumwong, Ming-Shyan Wang
This paper presents another control method for the three-phase induction motor that is direct torque control based on constant voltage per frequency control technique. This method uses the magnitude of stator flux and torque errors to generate the stator voltage and phase angle references for controlling the induction motor by using constant voltage per frequency control method. Instead of hysteresis comparators and optimum switching table, the PI controllers and space vector modulation technique are used to reduce torque and stator-flux ripples and achieve constant switching frequency...
December 27, 2017: ISA Transactions
https://www.readbyqxmd.com/read/29289194/visar-signal-analysis-with-an-emphasis-on-ellipse-fitting
#9
Amit Sur, K D Joshi, Archana Sharma, T C Kaushik
A method based on ellipse fitting for analysis of VISAR (Velocity Interferometer System for Any Reflector) signals has been described. The errors introduced on the free surface velocity history due to common measurement imperfections in the amplitude and phase angle of the VISAR signal has been investigated and a remedy to mitigate this using a proper ellipse fitting technique has been presented. Performance comparison among various ellipse fitting techniques based on empirical evidence is carried out, and the geometric fitting technique of the Gauss Newton algorithm with initial conditions from the Bookstein algebraic fitting method is proposed...
December 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29260797/entrained-delta-oscillations-reflect-the-subjective-tracking-of-time
#10
Luc H Arnal, Andreas K Kleinschmidt
The ability to precisely anticipate the timing of upcoming events at the time-scale of seconds is essential to predict objects' trajectories or to select relevant sensory information. What neurophysiological mechanism underlies the temporal precision in anticipating the occurrence of events? In a recent article,1 we demonstrated that the sensori-motor system predictively controls neural oscillations in time to optimize sensory selection. However, whether and how the same oscillatory processes can be used to keep track of elapsing time and evaluate short durations remains unclear...
2017: Communicative & Integrative Biology
https://www.readbyqxmd.com/read/29246199/possible-interference-between-seasonal-epidemics-of-influenza-and-other-respiratory-viruses-in-hong-kong-2014-2017
#11
Xueying Zheng, Zhengyu Song, Yapeng Li, Juanjuan Zhang, Xi-Ling Wang
BACKGROUND: Unlike influenza viruses, little is known about the prevalence and seasonality of other respiratory viruses because laboratory surveillance for non-influenza respiratory viruses is not well developed or supported in China and other resource-limited countries. We studied the interference between seasonal epidemics of influenza viruses and five other common viruses that cause respiratory illnesses in Hong Kong from 2014 to 2017. METHODS: The weekly laboratory-confirmed positive rates of each virus were analyzed from 2014 to 2017 in Hong Kong to describe the epidemiological trends and interference between influenza viruses, respiratory syncytial virus (RSV), parainfluenza virus (PIV), adenovirus, enterovirus and rhinovirus...
December 16, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29221904/tensile-behaviour-of-individual-fibre-bundles-in-the-human-lumbar-anulus-fibrosus
#12
Diana T Pham, Joe G Shapter, John J Costi
Disc degeneration is a common medical affliction whose origins are not fully understood. An improved understanding of its underlying mechanisms could lead to the development of more effective treatments. The aim of this paper was to investigate the effect of (1) degeneration, (2) circumferential region and (3) strain rate on the microscale mechanical properties (toe region modulus, linear modulus, extensibility, phase angle) of individual fibre bundles in the anulus fibrosus lamellae of the human intervertebral disc...
November 28, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29217332/revisiting-high-frequency-oscillatory-ventilation-in-vitro-and-in-silico-in-neonatal-conductive-airways
#13
REVIEW
Katrin Bauer, Eliram Nof, Josué Sznitman
BACKGROUND: High frequency oscillatory ventilation is often used for lung support in premature neonates suffering from respiratory distress syndrome. Despite its broad use in neonatal intensive care units, there are to date no accepted protocols for the choice of appropriate ventilation parameter settings. In this context, the underlying mass transport mechanisms are still not fully understood. METHODS: We revisit the question of flow phenomena under conventional mechanical ventilation and high frequency oscillatory ventilation in an anatomically-inspired model of neonatal conductive airways spanning the first few airway generations...
November 28, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29210931/phase-angle-is-moderately-associated-with-muscle-quality-and-functional-capacity-independent-of-age-and-body-composition-in-older-women
#14
Crisieli M Tomeleri, Edilaine F Cavalcante, Melissa Antunes, Hellen C G Nabuco, Mariana F de Souza, Denilson C Teixeira, Luis A Gobbo, Analiza M Silva, Edilson S Cyrino
BACKGROUND AND PURPOSE: There is a growing body of evidence indicating that phase angle (PhA) can be used as an indicator of nutritional status, disease prognosis, and mortality risk; however, it is still unknown whether PhA can be used as an explanator of functional capacity and muscle quality in older women. The main purpose of this cross-sectional study was to explore whether PhA is associated with muscle quality and functional capacity in older women, regardless of total and regional body composition...
November 28, 2017: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/29201536/the-challenges-of-nutritional-assessment-in-cirrhosis
#15
Alessio Molfino, Sheeva Johnson, Valentina Medici
Purpose of Review: Nutritional status in patients with cirrhosis is very frequently associated with macro- and micronutrient deficiencies. Cirrhosis itself is the cause of malnutrition and nutritional deficiencies but these conditions have to be identified and addressed properly as they can worsen the prognosis of cirrhosis. The goals of this review are to 1) identify and describe the challenges associated with nutritional assessment in cirrhosis and 2) describe recent advancements when using clinical, laboratory, and instrumental tools in the evaluation of malnourished patients with liver diseases...
September 2017: Current Nutrition Reports
https://www.readbyqxmd.com/read/29200983/the-short-term-effect-of-high-versus-moderate-protein-intake-on-recovery-after-strength-training-in-resistance-trained-individuals
#16
Justin Roberts, Anastasia Zinchenko, Craig Suckling, Lee Smith, James Johnstone, Menno Henselmans
Background: Dietary protein intakes up to 2.9 g.kg-1.d-1 and protein consumption before and after resistance training may enhance recovery, resulting in hypertrophy and strength gains. However, it remains unclear whether protein quantity or nutrient timing is central to positive adaptations. This study investigated the effect of total dietary protein content, whilst controlling for protein timing, on recovery in resistance trainees. Methods: Fourteen resistance-trained individuals underwent two 10-day isocaloric dietary regimes with a protein content of 1...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29197656/endocardial-infarct-scar-recognition-by-myocardial-electrical-impedance-is-not-influenced-by-changes-in-cardiac-activation-sequence
#17
Gerard Amorós-Figueras, Esther Jorge, Concepción Alonso-Martin, Daniel Traver, Maria Ballesta, Ramon Bragós, Javier Rosell-Ferrer, Juan Cinca
BACKGROUND: Measurement of myocardial electrical impedance can allow recognition of infarct scar and theoretically is not influenced by changes in cardiac activation sequence, but this is not known. OBJECTIVES: To evaluate the ability of endocardial electrical impedance measurements to recognize areas of infarct scar and to assess the stability of the impedance data under changes of cardiac activation sequence. METHODS: One month-old myocardial infarction confirmed by cardiac magnetic resonance (CMR) was induced in five pigs submitted to coronary artery catheter-balloon occlusion...
November 29, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29197561/phase-angle-is-related-with-inflammatory-and-oxidative-stress-biomarkers-in-older-women
#18
Crisieli Maria Tomeleri, Cláudia Regina Cavaglieri, Mariana Ferreira de Souza, Edilaine Fungari Cavalcante, Melissa Antunes, Hellen Clair Garcez Nabbuco, Danielle Venturini, Decio Sabbatini Barbosa, Analiza Mônica Silva, Edilson Serpeloni Cyrino
BACKGROUND: The aim of this study was to examine the relation between phase angle (PhA) and inflammatory and oxidative stress biomarkers in older women. METHODS: One hundred and fifty-five physically independent older women participated in this study (67.7±5.7years, 27.0±4.4kg/m2). Inflammatory markers included interleukin 6 (IL-6), tumor necrosis factor alpha (TNF-α), and acute phase reactive protein (CRP). Oxidative stress biomarkers comprised superoxide dismutase (SOD), catalase (CAT), advanced oxidation protein products (AOPP), and total radical-trapping antioxidant potential (TRAP)...
November 29, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29193449/characterization-of-glioblastoma-in-an-orthotopic-mouse-model-with-magnetic-resonance-elastography
#19
Katharina Schregel, Navid Nazari, Michal O Nowicki, Miklos Palotai, Sean E Lawler, Ralph Sinkus, Paul E Barbone, Samuel Patz
Glioblastoma (GBM) is the most common primary brain tumor. It is highly malignant and has a correspondingly poor prognosis. Diagnosis and monitoring are mainly accomplished with MRI, but remain challenging in some cases. Therefore, complementary methods for tumor detection and characterization would be beneficial. Using magnetic resonance elastography (MRE), we performed a longitudinal study of the biomechanical properties of intracranially implanted GBM in mice and compared the results to histopathology. The biomechanical parameters of viscoelastic modulus, shear wave speed and phase angle were significantly lower in tumors compared with healthy brain tissue and decreased over time with tumor progression...
November 29, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29188034/viscoelastic-properties-of-sweet-potato-complementary-porridges-as-influenced-by-endogenous-amylases
#20
Agnes Nabubuya, Agnes Namutebi, Yusuf Byaruhanga, Reidar B Schuller, Judith Narvhus, Trude Wicklund
Sweet potato (Ipomoea batatas L.) roots contain amylolytic enzymes, which hydrolyze starch thus having the potential to affect the viscosity of sweet potato porridges provided the appropriate working conditions for the enzymes are attained. In this study, the effect of sweet potato variety, postharvest handling conditions, freshly harvested and room/ambient stored roots (3 weeks), and slurry solids content on the viscoelastic properties of complementary porridges prepared using amylase enzyme activation technique were investigated...
November 2017: Food Science & Nutrition
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