Symptomatic Hyponatremia Following Tonsillectomy despite Using Isotonic Fluid

Hyponatremia is the most common electrolyte imbalance in inpatients, but severe symptomatic hyponatremia has a higher mortality rate in compared to normal patients. Post-operative hyponatremia in children can usually occur following administration of hypotonic fluid. However, inappropriate secretion of the antidiuretic hormone can also be the cause of post-operative hyponatremia. The study presents a case of Sixyear girl, who developed symptomatic hyponatremia despite administration of lactated Ringer’s solution after tonsillectomy. After electrolyte correction with 3% saline, the child recovered well without any further complications.