In rats, the hypothalamic neurotransmitter histamine participates in regulation of vasopressin secretion and seems to be of physiological importance, because blockade of the histaminergic system reduces dehydration-induced vasopressin secretion. We investigated whether histamine is also involved in regulation of vasopressin secretion during dehydration in humans. We found that 40 h of dehydrati...

INTRODUCTION Heart rate variability and resting metabolic rate are commonly to assess athlete's physiological status and energy requirements. Exercise-induced dehydration can reach up to 5% of body mass per hour. Consequently, dehydration may have a profound physiological effect on human's homeostasis. OBJECTIVES To compare the effects of dehydration and rehydration after exercise on heart ra...

Dehydration in the neonatal period has many causes. Dehydration is classified as isotonic, hypotonic, or hypertonic, based on the serum osmolality that in most cases is reflected in the serum sodium level. Hypernatremic dehydration is usually caused by gastroenteritis, but it can also be caused by salt poisoning or diabetes insipidus. This type of dehydration can be especially dangerous. The hy...

introduction: neonatal hypernatremia dehydration (nhd) is a dangerous condition in neonates, which is accompanied by acute complications (renal failure, cerebral edema, and cerebral hemorrhage) and chronic complications (developmental delay). children begin learning language from birth, and hearing impairment interferes with this process. we assessed the hearing status of infants with hypernatr...

The purpose of this study was to examine the in vitro dehydration characteristics of new and worn conventional and silicone-hydrogel contact lenses. Four contact lens materials were investigated: three conventional hydrogels (etafilcon, nelfilcon, omafilcon) and one silicone-hydrogel (narafilcon). Gravimetric data were obtained with analytical balance with 1 min intervals. Quantitative paramete...

Dehydration in clinical practice, as opposed to a physiological definition, refers to the loss of body water, with or without salt, at a rate greater than the body can replace it. We argue that the clinical definition for dehydration, ie, loss of total body water, addresses the medical needs of the patient most effectively. There are 2 types of dehydration, namely water loss dehydration (hypero...

introduction: water is an essential nutrient for life. it comprises 75% of total body weight in infants,60% in adult males and 50% in adult females. decrease in body water is commonly known as dehydration. acute or chronic dehydration is a common condition in some population groups, especialy the elderly and those who participate in physical activity in warm enviroments. potential consequences ...