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Hypernatremia and hyponatremia Hypernatremia and hyponatremia are among the most common electrolyte disorders in older people. Hypernatremia is caused by an increase in the concentration of the sodium in extracellular serum to more than 145 mEq per L. On the other hand, hyponatremia is caused by a decrease in the concentration of sodium in body, i.e. less than 135 mEq per L. Hyponatremia can be acute or chronic (Buttaro, 2013). Both hypernatremia and hyponatremia are commonly found clinical problems in critically ill patients. They are often asymptomatic, but in some patients their symptoms appear that can ...
