From The Thief and the Fallen album out now on Enemy Soil. iTunes: http://apple.co/1PNkd8L. Amazon: http://amzn.to/1EITdjv. MerchDirect: http://bit.ly/1HYpfsW. Video Credits: Directed & edited by Bill Connell, JC Costa & Ryan Donahue.
The term pseudohyponatremia is often erroneously used for hyponatremia caused by hyperglycemia, which increases the blood osmolality what results in the movement of water from the cells into the blood and therefore in dilutional hyponatremia, which is true hypertonic hypervolemic hyponatremia.
Hypernatremia with euvolemia is a decrease in TBW with near-normal total body sodium (pure water deficit). Extrarenal causes of water loss, such as excessive sweating, result in some sodium loss, but because sweat is hypotonic, hypernatremia can result before significant hypovolemia. A deficit of almost purely water also occurs in central diabetes insipidus and nephrogenic diabetes insipidus.