What characterizes isotonic dehydration?

Isotonic dehydration is characterized by the equal loss of body water and sodium. This type of dehydration typically occurs when the body loses fluids without a significant alteration in the osmolarity of the extracellular fluid, meaning that the concentration of solutes remains balanced. It can result from conditions such as vomiting or diarrhea, where both water and sodium are excreted in similar amounts.

Understanding isotonic dehydration is critical in gerontological nutrition because older adults are more vulnerable to fluid imbalances. Recognizing the signs and implications of isotonic dehydration can help healthcare professionals devise better hydration strategies to maintain electrolyte balance in this population.