Biophysical measures of skin tissue water: variations within and among anatomical sites and correlations between measures.
BACKGROUND: Biophysical measures to assess that skin water includes stratum corneum hydration via capacitance (SC), dermal water via tissue dielectric constant (TDC), and transepidermal water loss (TEWL). Since skin differs among anatomical sites and tissue depth we sought to determine the site and depth variability of these measures and their relationships. METHODS: Measurements were done [...]
Cognitive performance and hydration
No matter how mild, dehydration is not a desirable condition because there is an imbalance in the homeostatic function of the internal environment. This can adversely affect cognitive performance, not only in groups more vulnerable to dehydration, such as children and the elderly, but also in young adults. However, few studies have examined the impact [...]
Ethical issues around continuous deep sedation without hydration.
By reviewing the literature on the subject, this article examines whether continuous deep sedation without hydration--in the context of palliative care for patients with advanced cancer at the end of life--could be seen as a moral and clinical equivalent of so-called "slow euthanasia". It focuses on length of survival, fluid retention and thirst, and reviews [...]
Progressive Dehydration during Cycling Increases Skeletal Muscle Glycogenolysis and Perceived Exertion in Hydrated Males.
This study investigated the effects of progressive mild dehydration during cycling on whole body substrate oxidation and skeletal muscle metabolism in recreationally active men. Subjects (n=9) cycled for 120 min at ~65% VO2peak (22.7°C, 32% RH) with water to replace sweat losses (HYD) or without fluid (DEH). Blood samples were taken at rest and every [...]
Thirst in heart failure: a systematic literature review.
AIMS: Although patients with heart failure (HF) may suffer from severe thirst, this has received little attention in scientific studies. A systematic literature review was conducted to identify and analyse data on thirst in HF. METHODS AND RESULTS: Pubmed, Cochrane, Cinahl, and Medline databases were searched for original studies on patients with HF with thirst [...]
A subjective evaluation of a drinking system for saturation divers.
Studies have shown that divers may lose large volumes of body fluids in hot water suit (HWS) dives lasting for four hours or longer, and that this dehydration is mainly caused by sweating. Body fluid balance may be impaired and the diver's alertness and power of judgement could be influenced by such imbalance. The main [...]
Disorders in sodium-water balance.
Water balance control is aimed at normalizing cellular hydration, and sodium balance control at normalizing extracellular volume. Water balance control is based on the regulation of body fluid tonicity, while the control of sodium balance is based on the regulation of effective arterial volume. Disorders of water balance act on cellular hydration: primary disorders induce [...]
Assessing the Relationship between Vitamin D(3) and Stratum Corneum Hydration for the Treatment of Xerotic Skin.
Vitamin D(3) has been called the "sunshine" vitamin since the formation of vitamin D is mediated by exposure to sunlight. Vitamin D(3) is linked to many health benefits, however serum levels of vitamin D(3) have been decreasing over the last few decades and the lower levels of vitamin D(3) may have consequences on normal physiology. [...]
Challenges of linking chronic dehydration and fluid consumption to health outcomes.
The purpose of this article is to review the effects of chronic mild dehydration and fluid consumption on specific health outcomes including obesity. The electronic databases PubMed and Google Scholar were searched for relevant literature published from the time of their inception to 2011, with results restricted to studies performed on human subjects and reports [...]