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Body water and electrolytes

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https://www.readbyqxmd.com/read/28332116/sweating-rate-and-sweat-sodium-concentration-in-athletes-a-review-of-methodology-and-intra-interindividual-variability
#1
REVIEW
Lindsay B Baker
Athletes lose water and electrolytes as a consequence of thermoregulatory sweating during exercise and it is well known that the rate and composition of sweat loss can vary considerably within and among individuals. Many scientists and practitioners conduct sweat tests to determine sweat water and electrolyte losses of athletes during practice and competition. The information gleaned from sweat testing is often used to guide personalized fluid and electrolyte replacement recommendations for athletes; however, unstandardized methodological practices and challenging field conditions can produce inconsistent/inaccurate results...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28303369/clinical-aspects-of-changes-in-water-and-sodium-homeostasis-in-the-elderly
#2
REVIEW
Christian A Koch, Tibor Fulop
The population of elderly individuals is increasing worldwide. With aging, various hormonal and kidney changes occur, both affecting water homeostasis. Aging is a risk factor for chronic kidney disease (CKD) and many features of CKD are reproduced in the aging kidney. Dehydration and hyperosmolarity can be triggered by diminished thirst perception in this population. Elderly with dementia are especially susceptible to abnormalities of their electrolyte and body water homeostasis and should be (re-)assessed for polypharmacy...
March 16, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28272337/impact-of-isotonic-beverage-on-the-hydration-status-of-healthy-chinese-adults-in-air-conditioned-environment
#3
Phei Ching Siow, Wei Shuan Kimberly Tan, Christiani Jeyakumar Henry
People living in tropical climates spend much of their time in confined air-conditioned spaces, performing normal daily activities. This study investigated the effect of distilled water (W) or isotonic beverage (IB) on the hydration status in subjects living under these conditions. In a randomized crossover design, forty-nine healthy male subjects either consumed beverage or IB over a period of 8 h (8 h) in a controlled air-conditioned environment. Blood, urine, and saliva samples were collected at baseline and after 8 h...
March 7, 2017: Nutrients
https://www.readbyqxmd.com/read/28268713/investigations-on-different-epoxies-for-electrical-insulation-of-microflex-structures
#4
P Cvancara, S Lauser, L Rudmann, T Stieglitz
The microflex interconnection (MFI) technique is often used to connect electrically and mechanically thin film ribbons or electrodes with a solid substrate like screen printed ceramics. For stabilization reasons epoxy is used to fix the MFI structure. As epoxy tends to form cracks when surrounded by water or electrolytes we are eager to find an epoxy which provides sufficient insulation between the single channels of the MFI structure also in a moist surrounding. Therefore we designed a device to investigate the insulating properties of different epoxies (Uhu Plus Endfest 300, Epo-Tek 353ND and 353ND-T) immersed in saline solution...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267585/disturbances-of-thirst-and-fluid-balance-associated-with-aging
#5
REVIEW
Denovan P Begg
During heat waves, significant mortality and morbidity occurs in elderly populations due to heat-stress and dehydration. The dehydration is primarily attributable to inadequate water intake caused by dysfunction of the central nervous system mechanisms controlling thirst. The phenomenon of a reduced thirst in response to dehydration in aging was first observed decades ago and has been examined extensively since. The reduced thirst and ingestive behavior have been reported consistently in response to hyperosmotic stimuli, hypovolemic stimuli and dehydration in both elderly humans and animal models of aging...
March 3, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28262194/protective-effect-of-propolis-in-proteinuria-crystaluria-nephrotoxicity-and-hepatotoxicity-induced-by-ethylene-glycol-ingestion
#6
Nawal El Menyiy, Noori Al Waili, Meryem Bakour, Hamza Al-Waili, Badiaa Lyoussi
BACKGROUND AND AIMS: Propolis is a natural honeybee product with wide biological activities and potential therapeutic properties. The aim of the study is to evaluate the protective effect of propolis extract on nephrotoxicity and hepatotoxicity induced by ethylene glycol in rats. METHODS: Five groups of rats were used. Group 1 received drinking water, group 2 received 0.75% ethylene-glycol in drinking water, group 3 received 0.75% ethylene-glycol in drinking water along with cystone 500 mg/kg/body weight (bw) daily, group 4 received 0...
October 2016: Archives of Medical Research
https://www.readbyqxmd.com/read/28255797/acetate-buffered-crystalloid-infusate-versus-infusion-of-0-9-saline-and-hemodynamic-stability-in-patients-undergoing-renal-transplantation-prospective-randomized-controlled-trial
#7
Carmen Pfortmueller, Georg-Christian Funk, Eva Potura, Christian Reiterer, Florian Luf, Barbara Kabon, Wilfred Druml, Edith Fleischmann, Gregor Lindner
BACKGROUND: Infusion therapy is one of the most frequently prescribed medications in hospitalized patients. Currently used crystalloid solutes have a variable composition and may therefore influence acid-base status, intracellular and extracellular water content and plasma electrolyte compositions and have a major impact on organ function and outcome. The aim of our study was to investigate whether use of acetate-based balanced crystalloids leads to better hemodynamic stability compared to 0...
March 2, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28254387/colectomy-induces-an-aldosterone-mediated-increase-in-jejunal-glucose-uptake-in-rats
#8
Maha Khachab, Amjad Kanaan, Dania Awad, Elie Deeba, Samira Osman, Camille F Nassar
AIMS: The main function of the colon is water and electrolyte absorption. Total colectomy eliminates this colonic function and may alter the absorptive capacity of the small intestine for nutrients. This study examines the effect of total colectomy on jejunal glucose absorption and investigates the potential role of aldosterone in mediating the alterations in glucose uptake post-colectomy using the aldosterone antagonist spironolactone. MAIN METHODS: Total colectomy with ileo-rectal anastomosis was performed on anesthetized rats...
February 27, 2017: Life Sciences
https://www.readbyqxmd.com/read/28226901/investigations-on-different-epoxies-for-electrical-insulation-of-microflex-structures
#9
P Cvancara, S Lauser, L Rudmann, T Stieglitz, P Cvancara, S Lauser, L Rudmann, T Stieglitz, P Cvancara, S Lauser, T Stieglitz, L Rudmann
The microflex interconnection (MFI) technique is often used to connect electrically and mechanically thin film ribbons or electrodes with a solid substrate like screen printed ceramics. For stabilization reasons epoxy is used to fix the MFI structure. As epoxy tends to form cracks when surrounded by water or electrolytes we are eager to find an epoxy which provides sufficient insulation between the single channels of the MFI structure also in a moist surrounding. Therefore we designed a device to investigate the insulating properties of different epoxies (Uhu Plus Endfest 300, Epo-Tek 353ND and 353ND-T) immersed in saline solution...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222581/a-comparison-of-the-physiological-demands-imposed-by-competing-in-a-half-marathon-vs-a-marathon
#10
Juan Del Coso, Juan J Salinero, Beatriz Lara, Javier Abián-Vicén, César Gallo-Salazar, Francisco Areces
BACKGROUND: While there is widespread scientific information about the physiological challenges imposed on elite endurance runners during competitions, the information regarding the amateur population is scarce. The aim of this study was to compare the physical and physiological load imposed by competing in a real half-marathon vs a marathon race. METHODS: From a larger group of participants, we selected 22 experienced runners who were matched in pairs (11 marathoners and 11 half-marathoners) for age and anthropometric data...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28167686/high-salt-diet-causes-osmotic-gradients-and-hyperosmolality-in-skin-without-affecting-interstitial-fluid-and-lymph
#11
Elham Nikpey, Tine V Karlsen, Natalia Rakova, Jens M Titze, Olav Tenstad, Helge Wiig
The common notion is that the body Na(+) is maintained within narrow limits for fluid and blood pressure homeostasis. Several studies have, however, shown that considerable amounts of Na(+) can be retained or removed from the body without commensurate water loss and that the skin can serve as a major salt reservoir. Our own data from rats have suggested that the skin is hypertonic compared with plasma on salt storage and that this also applies to skin interstitial fluid. Even small electrolyte gradients between plasma and interstitial fluid would represent strong edema-generating forces...
February 6, 2017: Hypertension
https://www.readbyqxmd.com/read/28145415/changes-in-serum-osmotic-pressure-following-haemodialysis-treatments-lead-to-changes-in-bioimpedance-spectroscopy-estimates-of-lean-and-adipose-tissue
#12
M Antonelou, S El-Kateb, N Davies, A Davenport
Haemodialysis (HD) patients are at risk of sarcopenia. Newer bioimpedance devices (BIS) using a three-compartmental body composition model, separate extracellular water overhydration from normo-hydrated lean tissue mass (LTM) and adipose tissue mass (ATM). During HD hydration status changes, along with changes in electrolytes and solutes, and may alter body composition measurements. As such, we measured BIS and serum osmotic pressure (sOP) pre- and post dialysis in 43 patients. There were no significant changes in LTM (39...
February 1, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28141711/an-8-year-old-boy-with-treatment-resistant-encopresis
#13
Martin T Stein, Marc A Benninga, Barbara T Felt
Paul is an 8-year-old boy with a long-standing history of encopresis and enuresis. Potty training was initiated when he was 2 years old. At this time, his mother was absent from the home for 6 weeks when she cared for her ill father in a different city. The process of teaching Paul to use the bathroom was described as "inconsistent" due to multiple caretakers.Paul never successfully mastered bowel and bladder control. He continues to wet and soil his clothes on a daily basis at home and school. According to his parents, he does not accept responsibility and comments about his soiling such as, "I didn't do it; someone else must have put it there...
February 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28138765/low-dose-carperitide-%C3%AE-human-a-type-natriuretic-peptide-alleviates-hemoglobin-concentration-decrease-during-prolonged-oral-surgery-a-randomized-controlled-study
#14
Masanori Tsukamoto, Sayuri Koyama, Kanako Esaki, Takashi Hitosugi, Takeshi Yokoyama
PURPOSE: Surgical injury stimulates the renin-angiotensin-aldosterone system (RAAS) and causes antidiuresis, leading to postoperative oliguria. Carperitide (α-human A-type natriuretic peptide) is a cardiac peptide hormone secreted from the atrium. This peptide hormone enhances diuresis by suppressing the RAAS. In our experience, carperitide alleviates decreased hemoglobin (Hb) concentration during elective surgery. In the current study, we investigated the relationship between low-dose carperitide (0...
January 30, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28117000/vasopressin-and-related-peptides-potential-value-in-diagnosis-prognosis-and-treatment-of-clinical-disorders
#15
Ewa Szczepanska-Sadowska, Tymoteusz Zera, Piotr Sosnowski, Agnieszka Cudnoch-Jedrzejewska, Anna Puszko, Aleksandra Misicka
Vasopressin (AVP) and its receptors play a pivotal role in maintaining body homeostasis under physiological and pathophysiological conditions. As a consequence, the vasopressin system has emerged as an important target for both diagnostic and therapeutic applications in a number of medical conditions. Stoichiometric generation of AVP with copeptin, which is relatively accessible in the blood for measurements, makes copeptin a valuable surrogate of AVP. In this review, we present the regulation of release of AVP and activation of V1a, V1b, and V2 vasopressin receptors under physiological and pathological conditions...
January 19, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28104353/fluid-energy-and-nutrient-recovery-via-ad-libitum-intake-of-different-fluids-and-food
#16
Nadia Campagnolo, Elizaveta Iudakhina, Christopher Irwin, Matthew Schubert, Gregory R Cox, Michael Leveritt, Ben Desbrow
INTRODUCTION: This study compared the effects of ad libitum consumption of different beverages and foods on fluid retention and nutrient intake following exercise. METHODS: Ten endurance trained males (mean±SD; Age=25.3±4.9years, VO2max=63.0±7.2mL·kg·min(-1)) performed four trials employing a counterbalanced, crossover design. Following 60min of exercise (matched for energy expenditure and fluid loss) participants consumed either water (W1 and W2), a sports drink (Powerade® (P)) or a milk-based liquid meal supplement (Sustagen Sport® (SS)) over a four hour recovery period...
January 16, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28078240/effect-of-methanol-leaf-extract-of-dalbergia-saxatilis-hook-f-fabaceae-on-renal-function
#17
Fatima Ismail Hassan, Zezi Abdulkadir Umar, Danmalam Umar Habib, Yaro Abdullahi Hamza
OBJECTIVE: Dalbegia saxatilis (D.saxatilis) is used as a decoction in traditional medicine for ailments such as cough, small pox, skin lesions, bronchial ailments and toothache. This study is aimed at evaluating the toxic effect of methanol leaf extract of D.saxatilis on renal function. MATERIALS AND METHODS: Wistar rats of both sexes were divided into four groups of five: control animals (group 1) received distilled water 1 ml/kg while groups 2, 3 and 4 were given graded doses of the extract (250, 500 and 1000 mg/kg body weight, respectively) daily for 28 days...
November 2016: Avicenna Journal of Phytomedicine
https://www.readbyqxmd.com/read/27932937/effect-of-electrolyzed-high-ph-alkaline-water-on-blood-viscosity-in-healthy-adults
#18
RANDOMIZED CONTROLLED TRIAL
Joseph Weidman, Ralph E Holsworth, Bradley Brossman, Daniel J Cho, John St Cyr, Gregory Fridman
BACKGROUND: Previous research has shown fluid replacement beverages ingested after exercise can affect hydration biomarkers. No specific hydration marker is universally accepted as an ideal rehydration parameter following strenuous exercise. Currently, changes in body mass are used as a parameter during post-exercise hydration. Additional parameters are needed to fully appreciate and better understand rehydration following strenuous exercise. This randomized, double-blind, parallel-arm trial assessed the effect of high-pH water on four biomarkers after exercise-induced dehydration...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27925707/natural-mineral-bottled-waters-available-on-the-polish-market-as-a-source-of-minerals-for-the-consumers-part-2-the-intake-of-sodium-and-potassium
#19
Anna Gątarska, Joanna Ciborska, Elżbieta Tońska
Background: Natural mineral waters are purchased and consumed according to consumer preferences and possible recommendations. The choice of appropriate water should take into account not only the general level of mineralization but also the content of individual components, including electrolytes such as sodium and potassium. Sodium is necessary to ensure the proper physiological functions of the body. It is defined as a health risk factor only when its excessive intake occurs. Potassium acts antagonistically towards sodium and calcium ions, contributes to a reduction of the volume of extracellular fluids and at the same time reduces muscle tension and permeability of cell membranes...
2016: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/27899683/validation-of-an-integrative-mathematical-model-of-dehydration-and-rehydration-in-virtual-humans
#20
W Andrew Pruett, John S Clemmer, Robert L Hester
Water homeostasis is one of the body's most critical tasks. Physical challenges to the body, including exercise and surgery, almost always coordinate with some change in water handling reflecting the changing needs of the body. Vasopressin is the most important hormone that contributes to short-term water homeostasis. By manipulating vascular tone and regulating water reabsorption in the collecting duct of the kidneys, vasopressin can mediate the retention or loss of fluids quickly. In this study, we validated HumMod, an integrative mathematical model of human physiology, against six different challenges to water homeostasis with special attention to the secretion of vasopressin and maintenance of electrolyte balance...
November 2016: Physiological Reports
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