text: <unk>  is an electrolyte disturbance consisting of an elevated sodium level in the blood (compare to hyponatremia, meaning a low sodium level). It is defined as a serum sodium concentration exceeding 145 mEq/L. The most common cause of<unk>  is not an excess of sodium, but a relative deficit of free water in the body. For this reason,<unk>  is often synonymous with the less precise term dehydration.
option_0: Hypernatremia
option_1: Hyponatremia
option_2: Pseudohyponatremia
option_3: Alkalosis
option_4: Hypoosmolality
option_5: Hyperchloremic acidosis
option_6: Hypercarbia
option_7: Acidosis