نتایج جستجو برای: total body water

تعداد نتایج: 1917884  

Journal: :Journal of applied physiology 2004
Marie Lof Elisabet Forsum

Bioimpedance spectroscopy (BIS) is a technique of interest in the study of human pregnancy because it can assess extracellular (ECW), intracellular (ICW), and total body water (TBW) as ECW plus ICW. The technique requires appropriate resistivity coefficients and has not been sufficiently evaluated during the reproductive cycle. Therefore, in a methodological study, we estimated ECW, ICW, and TB...

Journal: :British medical journal 1973
F Skrabal R N Arnot G F Joplin

Despite the valuable research information on body electrolytes and water that is gained from isotope dilution studies, these investigations have not become routine clinical procedure. This is partly due to the fact that normal ranges for exchangeable sodium (NaE), exchangeable potassium (KE), extracellular fluid volume (E.C.F.V.), and total body water (T.B.W.) are wide owing to great individual...

Journal: :Clinical chemistry 1969
R C Robbins

ETHODS FOR DETERMINATION of deuterium oxide (D00) using infrared spectrophotometry have been reported by a number of workers (1-3). These methods permit determination of D00 in biologic fluids with an accuracy and precision satisfactory for determination of total body water and similar problems. The use of an infrared spectrophotometer for measurement of 1)20 in water and biologic fluids offers...

2014
Maulin K Shah Biruh Workeneh George E Taffet

Hypernatremia in the geriatric population is a common disorder associated with significant morbidity and mortality. Older people are predisposed to developing hypernatremia because of age-related physiologic changes such as decreased thirst drive, impaired urinary concentrating ability, and reduced total body water. Medications may exacerbate this predisposition. Hypernatremia and dehydration o...

Journal: :International journal of psychophysiology : official journal of the International Organization of Psychophysiology 2003
Birgit A Shanholtzer Stephen M Patterson

Adequate hydration is crucial in maintaining optimal physical and mental functioning and the need for a fast and reliable hydration status assessment in behavioral medicine research has become increasingly important. The goal of this study was to determine the reliability of bioelectrical impedance assessment (BIA) in assessing total body water (TBW), extracellular water (ECW) and intracellular...

Journal: :American journal of physiology. Renal physiology 2004
Minhtri K Nguyen Ira Kurtz

Recent theoretical considerations have played an important role in advancing our understanding of the physiological mechanisms responsible for perturbing the plasma water sodium concentration ([Na(+)](pw)) in health and disease. Central to these considerations is the original empirical relationship between the [Na(+)](pw) and total exchangeable sodium (Na(e)), total exchangeable potassium (K(e)...

2013
Szu-Chun Hung Yao-Ping Lin Hsin-Lei Huang Hsiao-Fung Pu Der-Cherng Tarng

BACKGROUND Elevated aldosterone is associated with increased mortality in the general population. In patients on dialysis, however, the association is reversed. This paradox may be explained by volume overload, which is associated with lower aldosterone and higher mortality. METHODS We evaluated the relationship between aldosterone and outcomes in a prospective cohort of 328 hemodialysis pati...

Journal: :The American journal of clinical nutrition 2008
Analiza M Silva Steven B Heymsfield Dympna Gallagher Jeanine Albu Xavier F Pi-Sunyer Richard N Pierson Jack Wang Stanley Heshka Luis B Sardinha Zimian Wang

BACKGROUND Extracellular water (ECW), a relevant molecular level component for clinical assessment, is commonly obtained by 2 methods that rely on assumptions that may not be possible to test at the time the measurements are made. OBJECTIVE The aim of the current study was to evaluate the degree of agreement between ECW assessment by the sodium bromide dilution (ECW(NaBr)) and total body pota...

Journal: :Journal of applied physiology 2005
Catherine O'Brien Beau J Freund Andrew J Young Michael N Sawka

Hypohydration occurs during cold-air exposure (CAE) through combined effects of reduced fluid intake and increased fluid losses. Because hypohydration is associated with reduced physical performance, strategies for maintaining hydration during CAE are important. Glycerol ingestion (GI) can induce hyperhydration in hot and temperate environments, resulting in greater fluid retention compared wit...

Journal: :The Journal of nutrition 2012
Alison D Gernand Parul Christian Kerry J Schulze Saijuddin Shaikh Alain B Labrique Abu Ahmed Shamim Keith P West

Plasma volume expansion has been associated with fetal growth. Our objective was to examine the associations between maternal nutritional status in early pregnancy and extracellular water (ECW), total body water (TBW), and percentage plasma volume change across pregnancy. In a subsample of 377 pregnant women participating in a cluster-randomized trial of micronutrient supplementation, hemoglobi...

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