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"Total body water"

Xiaopeng Guo, Lu Gao, Xiaodong Shi, Hailong Li, Qiang Wang, Zihao Wang, Wei Chen, Bing Xing
Objective: To investigate the preoperative body composition, metabolic characteristics, and postoperative changes in patients with active acromegaly and analyze the effects of gender and age. Methods: We included 36 patients with untreated acromegaly and 37 patients with nonfunctional pituitary adenomas. Adipose tissue (AT), the visceral fat index (VFI), sclerotin, protein, skeletal muscle, total body water (TBW), intracellular water (ICW), and extracellular water (ECW) were measured using bioelectrical impedance analysis (BIA)...
2018: International Journal of Endocrinology
Agnieszka Dmitruk, Jan Czeczelewski, Ewa Czeczelewska, Jolanta Golach, Urszula Parnicka
Background: Menopause, also referred to as climacterium, is a period of multiple changes in the structure and functions of a woman organism. Objective: Determination of differences in body composition and fatty tissue distribution in women from groups discriminated based on their menstrual status. Material and Methods: The survey covered 312 women aged 38-75 years. Menstrual status of the surveyed women was established according to WHO guidelines based on answers to a questionnaire, and three groups were discriminated: women in the premenopausal period (group 1), in the perimenopausal period (group 2), and in the postmenopausal period (group 3)...
2018: Roczniki Państwowego Zakładu Higieny
Maria-Eleni Roumelioti, Todd S Ing, Helbert Rondon-Berrios, Robert H Glew, Zeid J Khitan, Yijuan Sun, Deepak Malhotra, Dominic S Raj, Emmanuel I Agaba, Glen H Murata, Joseph I Shapiro, Antonios H Tzamaloukas
Osmotic diuresis results from urine loss of large amounts of solutes distributed either in total body water or in the extracellular compartment. Replacement solutions should reflect the volume and monovalent cation (sodium and potassium) content of the fluid lost. Whereas the volume of the solutions used to replace losses that occurred prior to the diagnosis of osmotic diuresis is guided by the clinical picture, the composition of these solutions is predicated on serum sodium concentration and urinary sodium and potassium concentrations at presentation...
March 6, 2018: International Urology and Nephrology
Jan Rozsypal, Martin Moos, Petr Šimek, Vladimír Koštál
Some insects rely on the strategy of freeze tolerance for winter survival. During freezing, extracellular body water transitions from the liquid to solid phase and cells undergo freeze-induced dehydration. Here we present results of a thermal analysis (from differential scanning calorimetry) of ice fraction dynamics during gradual cooling after inoculative freezing in variously acclimated larvae of two drosophilid flies, Drosophila melanogaster and Chymomyza costata. Although the species and variants ranged broadly between 0 and close to 100% survival of freezing, there were relatively small differences in ice fraction dynamics...
March 1, 2018: Journal of Experimental Biology
Hye Jin Kang, Dae Won Jun, Seung Min Lee, Eun Chul Jang, Yong Kyun Cho
Background: Recent several observational studies have reported that high salt intake is associated with obesity. But it is unclear whether salt intake itself induce obesity or low salt diet can reduce body fat mass. We investigated whether a low salt diet can reduce body weight and fat amount. Matrials and Methods: The randomized, open-label pilot trial was conducted at a single institution. A total of 85 obese people were enrolled. All participants were served meals three times a day, and provided either a low salt diet or control diet with same calorie...
February 2, 2018: Oncotarget
Meredith G Mock, Katie R Hirsch, Malia N M Blue, Eric T Trexler, Erica J Roelofs, Abbie E Smith-Ryan
The current study sought to evaluate the effects of post-exercise ingestion of a high molecular weight glucose polymer solution (HMW) compared to an isocaloric low molecular weight solution (LMW) or placebo (PLA) on subsequent cycling performance in female athletes. In a randomized, double-blind, placebo-controlled, cross-over design, 10 competitive female cyclists (Mean ± SD; Age = 25.7 ± 5.0 yrs; VO2peak = 49.7 ± 4.3 ml[BULLET OPERATOR]kg[BULLET OPERATOR]min) completed three testing sessions separated by 7-10 days...
February 27, 2018: Journal of Strength and Conditioning Research
Malia N M Blue, Katie R Hirsch, Eric T Trexler, Abbie E Smith-Ryan
The purpose of the present study was to assess the validity of dual-energy X-ray absorptiometry (DXA) to estimate body volume (BV) for use in a four-compartment (4C) body composition model in an overweight/obese population. Body composition of 61 overweight/obese adults (Age: 37.3 ± 10.0 yrs; Height: 170.2 ± 9.5 cm; Body mass: 97.1 ± 17.4 kg) was measured by two methods: a criterion 4C model and a DXA-derived BV 4C model. For both models, bioelectrical impedance spectroscopy was used to estimate total body water; total body bone mineral content was measured by a full body DXA scan...
February 23, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
João C P Santiago, Markus Otto, Werner Kern, Paul Christian Baier, Manfred Hallschmid
The hypothalamic neuropeptide orexin A (hypocretin-1) is a key signal in sleep/wake regulation and promotes food intake. We investigated the relationship between cerebrospinal fluid orexin A concentrations and body composition in non-narcoleptic human subjects with a wide range of body weight to gain insight into the role of orexin A in human metabolism. We collected cerebrospinal fluid and blood samples and measured body composition by bioelectric impedance analysis in 36 subjects (16 women and 20 men) with body mass indices between 16...
February 19, 2018: Peptides
A Mohan, R Poulose, A Ansari, K Madan, V Hadda, G C Khilnani, R Guleria
BACKGROUND: Malnutrition is frequent in lung cancer and is measured using various tools, including the novel bioelectric impedance technique for measuring body composition. However, the validation of this technique for assessing body composition in advanced small cell lung cancer (SCLC) is untested. METHODS: Forty-one treatment naïve patients (all males) and an equal number of age- and sex-matched controls were evaluated by anthropometric measurements of skinfold thicknesses and body composition parameters such as body fat%, fat mass, fat-free mass (FFM), and total body water (TBW)...
April 2017: Indian Journal of Cancer
Cassie M Williamson, Brett S Nickerson, Emily E Bechke, Cherilyn N McLester, Brian M Kliszczewicz
Background: Bioelectrical impedance analysis (BIA) is often used to estimate total body water (TBW), intracellular body water (ICW), extracellular body water (ECW), and body fat percentage (BF%). A common restriction for BIA analysis is abstinence from caffeine 12-h prior to testing. However, research has yet to determine whether the consumption of caffeine influences BIA testing results. The purpose of this study was to determine if the consumption of caffeine influences BIA-derived BF% and body water values in habitual caffeine users...
2018: Journal of the International Society of Sports Nutrition
Hao Liu, Rong Lu, Shani Shastri, Mark Sonderman, Peter Noel Van Buren
BACKGROUND/AIMS: Extracellular volume (ECV) overload is a mortality risk factor in hemodialysis patients, but no standard approach exists to objectively assess this clinically. We aimed to quantify relationships between slopes of repeated intradialytic blood pressure (BP) measurements and ECV. METHODS: In a cross-sectional study of 71 hemodialysis patients, we calculated BP slopes from all intradialytic measurements using Gaussian regression. We measured extracellular and total body water (TBW) with bioimpedance spectroscopy...
February 13, 2018: Nephron
Houda Ben Jemaa, Amani Mankaï, Sarra Khlifi, Rim Minaoui, Dhekra Ghozzi, Manel Zediri, Belhassen Kortobi, Inchirah Karmous, Halima Ben Hmad, Fethi Ben Slama, Henda Jamoussi, Hassan Aguenaou, Khalid El Kari, Abdallah Aouidet
BACKGROUND/OBJECTIVES: Accuracy of impedance analysis depends on population-specific prediction equations. The aim of this study was to propose new prediction equations to estimate body composition using impedance analysis for healthy Tunisian children and validate them using the deuterium oxide dilution (D2 O) technique. SUBJECTS/METHODS: Body composition was estimated by the Tanita impedance analyzer. The validity of this system was investigated in 134 school children aged between 8 and 11 years...
February 8, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
Qiang Li, Xueni Li, Yuxin Leng, Xi Zhu, Gaiqi Yao
OBJECTIVE: To assess the nutritional status of severe malnutrition patients with anorexia nervosa by multi-frequency bioelectrical impedance technique, and to provide the basis for nutritional support therapy. METHODS: A prospective study was conducted. Twenty-six severe malnutrition patients with anorexia nervosa, body mass index (BMI) ≤ 16 kg/m2 admitted to intensive care unit (ICU) of Peking University Third Hospital and general three ward of Peking University Sixth Hospital from June 1st to September 30th, 2017 were enrolled...
February 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
Imane El Harchaoui, Asmaa El Hamdouchi, Issad Baddou, Imane El Menchawy, Kaoutar Benjeddou, Naima Saeid, Hakim Belghiti, Mohammed El Mzibri, Khalid El Kari, Hassan Aguenaou
BACKGROUND/OBJECTIVES: Estimating body composition using bioelectric impedance analysis (BIA) requires specific prediction equations. The purpose of our study was to examine the validity of published BIA equations for assessing total body water (TBW) and fat-free mass (FFM) using deuterium oxide dilution (D2 O) as a reference method and to develop new FFM and TBW BIA equations if needed for Moroccan pre-pubertal children. SUBJECTS/METHODS: Data were collected from 247 schoolchildren aged 8-11 years old...
February 1, 2018: European Journal of Clinical Nutrition
Baris U Agar, James A Sloand
BACKGROUND: Incremental dialysis utilizes gradually increasing dialysis doses in response to declines in residual kidney function, and it is the preferred renal replacement therapy for patients who have just transitioned to end-stage renal disease (ESRD). Incremental peritoneal dialysis (PD) may impose fewer restrictions on patients' lifestyle, help attenuate lifetime peritoneal and systemic exposure to glucose and its degradation products, and minimize connections that could compromise the sterile fluid path...
January 31, 2018: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
Kook-Hwan Oh, Seon Ha Baek, Kwon-Wook Joo, Dong Ki Kim, Yon-Su Kim, Sejoong Kim, Yun Kyu Oh, Byoung Geun Han, Jae Hyun Chang, Wookyung Chung, Ki Young Na
INTRODUCTION: In peritoneal dialysis (PD) patients, volume overload is related to cardiac dysfunction and mortality, while intravascular volume depletion is associated with a rapid decline in the residual renal function (RRF). This study sought to determine the clinical usefulness of bioimpedance spectroscopy (BIS)-guided fluid management for preserving RRF and cardiac function in PD patients. SUBJECTS AND METHODS: This is a multicenter, prospective, open-label study that was conducted over a 1-year period (NCT01887262)...
January 31, 2018: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
Agata Leońska-Duniec, Zbigniew Jastrzębski, Aleksandra Jażdżewska, Ficek Krzysztof, Paweł Cięszczyk
Leptin (LEP) and leptin receptor (LEPR) genes have been studied for their potential association with development of human obesity and its related complications.Therefore, we have decided to check if selected body mass, body composition, and metabolic variables observed in physically active participants will be modulated by the polymorphisms.The genotype distribution was examined in a group of 201 women measured for chosen traits before and after the completion of a 12-week aerobic training program.Our results revealed a significant interaction between training and LEP genotype for glucose level...
January 24, 2018: Journal of Strength and Conditioning Research
Jeremy A Sandgren, Danny W Linggonegoro, Shao Yang Zhang, Sarah A Sapouckey, Kristin E Claflin, Nicole A Pearson, Mariah R Leidinger, Gary L Pierce, Mark K Santillan, Katherine N Gibson-Corley, Curt D Sigmund, Justin L Grobe
Angiotensin II (ANG) stimulates the release of arginine vasopressin (AVP) from the neurohypophysis through activation of AT1 receptors within the brain, though it remains unclear whether AT1 receptors expressed on AVP-expressing neurons directly mediate this control. We explored the hypothesis that ANG acts through AT1A receptors expressed directly upon AVP-producing cells to regulate AVP secretion. In-situ hybridization and transgenic mice demonstrated localization of AVP and AT1A mRNA in the supraoptic nucleus (SON) and the paraventricular nucleus (PVN), but co-expression of both AVP and AT1A mRNA was only observed in the SON...
January 24, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
Maria-Eleni Roumelioti, Robert H Glew, Zeid J Khitan, Helbert Rondon-Berrios, Christos P Argyropoulos, Deepak Malhotra, Dominic S Raj, Emmanuel I Agaba, Mark Rohrscheib, Glen H Murata, Joseph I Shapiro, Antonios H Tzamaloukas
The regulation of body fluid balance is a key concern in health and disease and comprises three concepts. The first concept pertains to the relationship between total body water (TBW) and total effective solute and is expressed in terms of the tonicity of the body fluids. Disturbances in tonicity are the main factor responsible for changes in cell volume, which can critically affect brain cell function and survival. Solutes distributed almost exclusively in the extracellular compartment (mainly sodium salts) and in the intracellular compartment (mainly potassium salts) contribute to tonicity, while solutes distributed in TBW have no effect on tonicity...
January 6, 2018: World Journal of Nephrology
Nazanin Noori, Ron Wald, Arti Sharma Parpia, Marc B Goldstein
Background: Accurate assessment of total body water (TBW) is essential for the evaluation of dialysis adequacy (Kt/V urea ). The Watson formula, which is recommended for the calculation of TBW, was derived in healthy volunteers thereby leading to potentially inaccurate TBW estimates in maintenance hemodialysis recipients. Bioimpedance spectroscopy (BIS) may be a robust alternative for the measurement of TBW in hemodialysis recipients. Objectives: The primary objective of this study was to evaluate the accuracy of Watson formula-derived TBW estimates as compared with TBW measured with BIS...
2018: Canadian Journal of Kidney Health and Disease
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