All electrolyte abnormalities are seen in immediate postoperative period, EXCEPT -: (A) Negative Nitrogen balance, (B) Hypokalemia, (C) Glucose intolerance, (D) Hyponatremia
Answer is D. Following surgery there is variable period of reduced excretion of sodium due to increased adrenocortical activity. This leads to hypernatremia therefore it is advisable not to administer large quantities of isotonic (a) saline solution.
Sometimes postoperative hyponatremia too develops, as a result of too prolonged administration of sodium free solution.