Background and Aim: Hyponatremia is supposed to be the most common electrolyte abnormality in the paediatric intensive care unit (PICU), and is associated with increased morbidity and mortality. Present study was carried out with an aim to study on hyponatremia in children admitted in Pediatric intensive care unit. Material and Methods: Present study was carried out in the Department of Pediatrics, Gujarat Adani institute of medical science, Bhuj for over a period of March 2015 to June 2016. Using aseptic technique, 2ml of blood was introverted from the antecubital fossa of each patient and put in a vacationer. Samples were stored at 280 C. Samples were sent for serum electrolytes to the Department of Biochemistry. Results: In this study incidence of hyponatremia in bronchopneumonia was 22.88%. Incidence of hyponatremia in bronchiolitis was 27.99%. Incidence of hyponatremia in seizures was 17.52%. Incidence of hyponatremia in meningitis was 59.01%. Incidence of hyponatremia in fevers was 13.90%. Incidence of hyponatremia in other diseases was 08.99%. Conclusion: There is a high prevalence of hyponatremia in children admitted in PICU. Meningitis, Acute gastroenteritis/acute diarrhoeal illness, Bronchopneumonia and Bronchiolitis patients were having hyponatremia in the majority of them. Premature recognition of hyponatremia is obligatory to start proper fluid management, or else additional hyponatremia causes permanent brain damage and death.

Keywords: Bhuj; Children; Electrolyte; Hyponatremia; Incidence.