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"Total body water"

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https://www.readbyqxmd.com/read/28537652/efficacy-and-safety-of-very-low-calorie-ketogenic-diet-a-double-blind-randomized-crossover-study
#1
C Colica, G Merra, A Gasbarrini, A De Lorenzo, G Cioccoloni, P Gualtieri, M A Perrone, S Bernardini, V Bernardo, L Di Renzo, M Marchetti
OBJECTIVE: To verify safety respect to weight loss, cardiometabolic diseases of short-term Very low-calorie ketogenic diets (VLCKDs, <800 kcal day-1). PATIENTS AND METHODS: Randomized cross-over trial with placebo. The study had no. 2 dietary treatment (DT), conducted in two arms: (1) VLCKD1 in which 50% of protein intake is replaced with synthetic amino acids; (2) VLCKD2 with placebo. The VLCKDs (<800 kcal day-1) were different in term of protein content and quality each arm lasted three weeks (wks)...
May 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28530202/effect-of-age-and-blood-pressure-on-determination-of-normal-fluid-status-in-a-general-population-using-whole-body-and-calf-bioimpedance-techniques
#2
Fansan Zhu, Samer R Abbas, Peter Kotanko, Nathan W Levin
Normal fluid status (dry weight) can be identified by hydration markers established in the healthy population. The general population average could be influenced by age with its accompanying physiological changes and/or illness. The aims of this study were (1) to evaluate the effect of age and systolic blood pressure (SBP) on these markers; (2) to compare mean values of hydration markers as assessed by different bioimpedance techniques. Subjects from the general population (n  =  212, males 105, 57...
June 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28514233/energy-balance-over-one-athletic-season
#3
Analiza M Silva, Catarina N Matias, Diana A Santos, Diana Thomas, Anja Bosy-Westphal, Manfred J Müller, Steven B Heymsfield, Luís B Sardinha
INTRODUCTION: Magnitude and variation in energy balance (EB) components over an athletic season are largely unknown. PURPOSE: We investigated the longitudinal changes in EB over one season and explored the association between EB variation and the change in the main fat-free mass (FFM) components in highly trained athletes. METHODS: Eighty athletes (54 males; handball, volleyball, basketball, triathlete, and swimming) were evaluated from the beginning of the season to the main competition stage...
March 22, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28513264/body-composition-analysis-by-using-bioelectrical-impedance-in-a-young-healthy-chinese-population-methodological-considerations
#4
Wei Chen, Hua Jiang, Jiong-Xian Yang, Hao Yang, Jing-Min Liu, Xiu-Yuan Zhen, Lian-Jun Feng, Jian-Chun Yu
OBJECTIVE: To develop a new bioelectrical impedance analysis (BIA) model for analyzing body composition by using isotope dilution, magnetic resonance imaging (MRI), and dual-energy X-ray absorptiometry (DEXA) as the reference methods in young healthy Chinese populations. METHODS: Thirty healthy participants were enrolled. Their body composition was analyzed using BIA and 3 reference methods. We established a model that uniformed data from 3 references methods (isotope, MRI, and DEXA) into 1 formula...
June 2017: Food and Nutrition Bulletin
https://www.readbyqxmd.com/read/28512162/increase-in-extracellular-hydration-status-after-initiating-peritoneal-dialysis-electively
#5
Kwanpeemai Panorchan, Andrew Davenport
Renal replacement therapy is designed to treat uremic symptoms and correct hypervolemia. We hypothesized that starting peritoneal dialysis (PD) should reduce overhydration, and we measured body composition and hydration status using bioimpedance in PD patients prior to training and then at the first assessment of peritoneal membrane function. We studied 100 consecutive patients with a planned start to PD, without peritoneal infections or mechanical catheter problems, mean age 54.7 ± 17.1 years, 57% male and 25% diabetic...
May 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/28497294/a-two-step-deconvolution-analysis-informed-population-pharmacodynamic-modeling-approach-for-drugs-targeting-pulsatile-endogenous-compounds
#6
Michiel J van Esdonk, Jacobus Burggraaf, Piet H van der Graaf, Jasper Stevens
Pharmacodynamic modeling of pulsatile endogenous compounds (e.g. growth hormone [GH]) is currently limited to the identification of a low number of pulses. Commonly used pharmacodynamic models are not able to capture the complexity of pulsatile secretion and therefore non-compartmental analyses are performed to extract summary statistics (mean, AUC, Cmax). The aim of this study was to develop a new quantification method that deals with highly variable pulsatile data by using a deconvolution-analysis-informed population pharmacodynamic modeling approach...
May 11, 2017: Journal of Pharmacokinetics and Pharmacodynamics
https://www.readbyqxmd.com/read/28434207/maternal-rates-of-lipolysis-and-glucose-production-in-late-pregnancy-are-independently-related-to-fetal-weight
#7
Barbro Diderholm, Kathryn Beardsall, Peter Murgatroyd, Christoph Lees, Jan Gustafsson, David Dunger
OBJECTIVE: Associations between maternal glucose levels and increased fetal growth are well established and independent relationships with maternal weight, weight gain and insulin resistance are also observed. The relative roles of lipolysis and glucose production in the determination of these observations remain unclear. DESIGN: We examined, through detailed physiological studies, the relationship between maternal late gestational energy substrate production (glucose and glycerol), maternal weight and weight gain, and estimated fetal size in the third trimester...
April 23, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28422530/physiological-changes-following-competition-in-male-and-female-physique-athletes-a-pilot-study
#8
Eric T Trexler, Katie R Hirsch, Bill I Campbell, Abbie E Smith-Ryan
The purpose of the current study was to evaluate changes in body composition, metabolic rate, and hormones during post-competition recovery. Data were collected from natural physique athletes (7 male/8 female) within one week before (T1) competition, within one week after (T2), and 4-6 weeks after (T3) competition. Measures included body composition (fat mass [FM] and lean mass [LM] from ultrasongraphy), resting metabolic rate (RMR; indirect calorimetry), and salivary leptin, testosterone, cortisol, ghrelin, and insulin...
April 19, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28421004/neurosensory-and-cognitive-modifications-in-europe-s-toughest-randoraid-competition-the-transpyr%C3%A3-n%C3%A3-a-extreme-study
#9
Alessandro Tonacci, Simona Mrakic-Sposta, Kristian Ujka, Francesco Sansone, Alice Ferrisi, Guido Giardini, Raffaele Conte, Lorenza Pratali
Introduction: Given the wide proliferation of ultra-long endurance races, it is important to understand the physiological response of the athletes to improve their safety. We evaluated the cognitive and neurosensory effects on ultra-endurance athletes during the Transpyrénéa (866 Km, 65,000 m positive slope), held on the French Pyrenees. Materials and Methods: 40 athletes were enrolled (age 43.8 ± 8.8 years; 36 males). Olfactory and cognitive tests were performed before the race (T0, n = 40), at 166 kms (T1, n = 28), at 418 kms (T2, n = 20), and after the race (T3, 866 kms, n = 13)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28410328/manipulation-of-muscle-creatine-and-glycogen-changes-dual-x-ray-absorptiometry-estimates-of-body-composition
#10
Julia L Bone, Megan L Ross, Kristyen A Tomcik, Nikki A Jeacocke, Will G Hopkins, Louise M Burke
Standardizing a dual x-ray absorptiometry (DXA) protocol is thought to provide a reliable measurement of body composition. PURPOSE: We investigated the effects of manipulating muscle glycogen and creatine content independently and additively on DXA estimates of lean mass. METHOD: Eighteen well-trained male cyclists undertook a parallel group application of creatine loading (n = 9) (20 g·d for 5 d loading; 3 g·d maintenance) or placebo (n = 9) with crossover application of glycogen loading (12 v 6 g·kg BM per day for 48 h) as part of a larger study involving a glycogen-depleting exercise protocol...
May 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28382898/impact-of-food-and-fluid-intake-on-technical-and-biological-measurement-error-in-body-composition-assessment-methods-in-athletes
#11
Ava Kerr, Gary J Slater, Nuala Byrne
Two, three and four compartment (2C, 3C and 4C) models of body composition are popular methods to measure fat mass (FM) and fat-free mass (FFM) in athletes. However, the impact of food and fluid intake on measurement error has not been established. The purpose of this study was to evaluate standardised (overnight fasted, rested and hydrated) v. non-standardised (afternoon and non-fasted) presentation on technical and biological error on surface anthropometry (SA), 2C, 3C and 4C models. In thirty-two athletic males, measures of SA, dual-energy X-ray absorptiometry (DXA), bioelectrical impedance spectroscopy (BIS) and air displacement plethysmography (BOD POD) were taken to establish 2C, 3C and 4C models...
February 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28376734/sleep-apnea-prevalence-in-chronic-kidney-disease-association-with-total-body-water-and-symptoms
#12
Hsin-Chia Huang, Giles Walters, Girish Talaulikar, Derek Figurski, Annette Carroll, Mark Hurwitz, Krishna Karpe, Richard Singer
BACKGROUND: Sleep apnea is common and associated with poor outcome in severe chronic kidney disease, but validated screening tools are not available. Our objectives were to determine the prevalence of sleep apnea in this population, to assess the validity of screening for sleep apnea using an ApneaLink device and to investigate the relationship of sleep apnea to; symptoms, spirometry and body water. METHODS: Patients with glomerular filtration rate ≤30 mL/min/1...
April 4, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28373014/the-combyn%C3%A2-ecg-adding-haemodynamic-and-fluid-leads-for-the-ecg-part-ii-prediction-of-total-body-water-tbw-extracellular-fluid-ecf-ecf-overload-fat-mass-fm-and-dry-appendicular-muscle-mass-appmm
#13
Falko Skrabal, Georg P Pichler, Mathias Penatzer, Johannes Steinbichl, Anna-Katharina Hanserl, Alfred Leis, Herbert Loibner
Simultaneous with a 12 channel ECG, body composition was analysed by segmental multi-frequency impedance analysis in 101 healthy subjects and in 118 patients with chronic heart failure (CHF, n= 40), chronic renal failure with haemodialysis (HD, n= 20), and miscellaneous internal diseases (n= 58). Whole body DXA and sodium bromide dilution were used as reference methods for total body water (TBW), extracellular fluid (ECF), appendicular muscle mass (AppMM) and fat mass (FM). Empirical prediction equations were developed in a randomized evaluation sample and then evaluated in unknowns...
March 31, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28365067/the-utility-of-a-phase-angle-analysis-in-patients-with-severe-motor-and-intellectual-disabilities
#14
Motomu Yoshida, Kimio Asagiri, Suguru Fukahori, Yoshiaki Tanaka, Naoki Hashizume, Shinji Ishii, Nobuyuki Saikusa, Naruki Higashidate, Daisuke Masui, Naoko Komatsuzaki, Hirotomo Nakahara, Minoru Yagi, Yushiro Yamashita
PURPOSE: The purpose of the present study was to evaluate whether evaluating the phase angle (PhA), in a bioelectrical impedance analysis (BIA) is useful for estimating the nutritional status of severe motor and intellectual disabilities (SMID) patients. SUBJECTS AND METHODS: This retrospective study included 31 SMID patients (mean age: 33.9±13.5years, median age: 29years (range: 18-58years), male/female: 23/8). First, each of the parameters from the total study population and the male and female SMID patients were compared with those of healthy Asian subjects...
March 29, 2017: Brain & Development
https://www.readbyqxmd.com/read/28360221/nfat5-and-slc4a10-loci-associate-with-plasma-osmolality
#15
Carsten A Böger, Mathias Gorski, Gearoid M McMahon, Huichun Xu, Yen-Pei C Chang, Peter J van der Most, Gerjan Navis, Ilja M Nolte, Martin H de Borst, Weihua Zhang, Benjamin Lehne, Marie Loh, Sian-Tsung Tan, Eric Boerwinkle, Morgan E Grams, Peggy Sekula, Man Li, Beth Wilmot, James G Moon, Paul Scheet, Francesco Cucca, Xiangjun Xiao, Leo-Pekka Lyytikäinen, Graciela Delgado, Tanja B Grammer, Marcus E Kleber, Sanaz Sedaghat, Fernando Rivadeneira, Tanguy Corre, Zoltan Kutalik, Sven Bergmann, Carrie M Nielson, Priya Srikanth, Alexander Teumer, Martina Müller-Nurasyid, Anne Catharina Brockhaus, Arne Pfeufer, Wolfgang Rathmann, Annette Peters, Martha Matsumoto, Mariza de Andrade, Elizabeth J Atkinson, Cassianne Robinson-Cohen, Ian H de Boer, Shih-Jen Hwang, Iris M Heid, Martin Gögele, Maria Pina Concas, Toshiko Tanaka, Stefania Bandinelli, Mike A Nalls, Andrew Singleton, Salman M Tajuddin, Adebowale Adeyemo, Jie Zhou, Ayo Doumatey, Shannon McWeeney, Joanne Murabito, Nora Franceschini, Michael Flessner, Michael Shlipak, James G Wilson, Guanjie Chen, Charles N Rotimi, Alan B Zonderman, Michele K Evans, Luigi Ferrucci, Olivier Devuyst, Mario Pirastu, Alan Shuldiner, Andrew A Hicks, Peter Paul Pramstaller, Bryan Kestenbaum, Sharon L R Kardia, Stephen T Turner, LifeLines Cohort Study, Tamara Ellefson Briske, Christian Gieger, Konstantin Strauch, Christa Meisinger, Thomas Meitinger, Uwe Völker, Matthias Nauck, Henry Völzke, Peter Vollenweider, Murielle Bochud, Gerard Waeber, Mika Kähönen, Terho Lehtimäki, Winfried März, Abbas Dehghan, Oscar H Franco, Andre G Uitterlinden, Albert Hofman, Herman A Taylor, John C Chambers, Jaspal S Kooner, Caroline S Fox, Robert Hitzemann, Eric S Orwoll, Cristian Pattaro, David Schlessinger, Anna Köttgen, Harold Snieder, Afshin Parsa, David M Cohen
Disorders of water balance, an excess or deficit of total body water relative to body electrolyte content, are common and ascertained by plasma hypo- or hypernatremia, respectively. We performed a two-stage genome-wide association study meta-analysis on plasma sodium concentration in 45,889 individuals of European descent (stage 1 discovery) and 17,637 additional individuals of European descent (stage 2 replication), and a transethnic meta-analysis of replicated single-nucleotide polymorphisms in 79,506 individuals (63,526 individuals of European descent, 8765 individuals of Asian Indian descent, and 7215 individuals of African descent)...
March 30, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28352009/validation-of-bioelectrical-impedance-analysis-for-assessing-dry-weight-of-dialysis-patients-in-pakistan
#16
Huma Asmat, Romaina Iqbal, Fatima Sharif, Aamer Mahmood, Aamir Abbas, Waqar Kashif
Accurate dry weight estimation (DW) to achieve euvolemia is one of the key objectives of hemodialysis (HD). While conventionally DW is estimated by clinical examination, bioelectrical impedance analysis (BIA) has been proposed as an objective method to determine DW and has been tested extensively in the Western population. We aim to validate BIA for determining DW in a Pakistani population against the conventional clinician's method. This is a single-center validation study conducted at two outpatient HD units of Aga Khan Hospital, Karachi...
March 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28351760/extreme-nitrite-tolerance-in-the-clown-knifefish-chitala-ornata-is-linked-to-up-regulation-of-methaemoglobin-reductase-activity
#17
Le Thi Hong Gam, Frank Bo Jensen, Christian Damsgaard, Do Thi Thanh Huong, Nguyen Thanh Phuong, Mark Bayley
The clown knifefish is a facultative air breather, which is widely farmed in freshwater ponds in Vietnam. Here we report a very high nitrite tolerance (96h LC50 of 7.82mM) in this species and examine the effects of 1mM (LC5) and 2.5mM (LC10) ambient nitrite on haemoglobin (Hb) derivatives, electrolyte levels, acid-base status, and total body water content during 7days of exposure. Furthermore, we tested the hypothesis that erythrocyte methaemoglobin (metHb) reductase activity is upregulated by nitrite exposure...
June 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28337087/medication-dosage-in-overweight-and-obese-children
#18
Kelly L Matson, Evan R Horton, Amanda C Capino
Approximately 31.8% of U.S. children ages 2 to 19 years are considered overweight or obese. This creates significant challenges to dosing medications that are primarily weight based (mg/kg) and in predicting pharmacokinetics parameters in pediatric patients. Obese individuals generally have a larger volume of distribution for lipophilic medications. Conversely, the Vd of hydrophilic medications may be increased or decreased due to increased lean body mass, blood volume, and decrease percentage of total body water...
January 2017: Journal of Pediatric Pharmacology and Therapeutics: JPPT: the Official Journal of PPAG
https://www.readbyqxmd.com/read/28331868/a-novel-practical-equation-for-treatment-of-emergent-hypernatremia-and-dehydration-phase-in-infants
#19
Saba Ghaffary, Azadeh Moghaddas, Mehrnoush Dianatkhah
Serum sodium (Na) concentration more than 145 mmol/L is defined as hypernatremia. Hypernatremia carries an acute morbidity and mortality, especially in neonates and infants. Rapid correction of hypernatremia leads to severe cerebral damages, and seizure is the most common neurological complication of hypernatremia. Selection and calculation of an appropriate fluid and its amount is one of the tremendous challenges. It is important to choose the correct amount of suitable fluid and adjust rehydration rate. In this study, we have suggested practical equation to determine the amount of fluid that should be administered to the neonates and infants with hypernatremia...
January 2017: Journal of Research in Pharmacy Practice
https://www.readbyqxmd.com/read/28319679/evaluation-of-body-composition-with-bioimpedence-a-comparison-between-athletic-and-non-athletic-children
#20
Domenico Meleleo, Nicola Bartolomeo, Liliana Cassano, Alessandro Nitti, Giovanna Susca, Giuseppina Mastrototaro, Umberto Armenise, Annapaola Zito, Fiorella Devito, Pietro Scicchitano, Marco Matteo Ciccone
PURPOSE: Conventional Bioelectrical Impedance Analysis (BIA) or Bioelectrical Impedance Vector Analysis (BIVA) can provide direct evaluations of body composition. The purpose of this study was to evaluate lean and fat mass (FM), and hydration of children involved in daily competitive sports. METHODS: 190 non-athletic [8.2-10.5 years] and 29 competitive children [8.0-10.5 years] were enrolled. They were evaluated: at baseline (t0), 6 months (t1) and one year (t2)...
July 2017: European Journal of Sport Science
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