ABSTRACT
We studied serum sodium levels within 2 hours of admission of 100 children aged 2months to 5 years admitted with diagnosis of lower respiratory infections(pneumonia,bronchiolitis, bronchitis, empyema and WALRI). Methods: In our study out of these 100 cases 33(33%) cases were having hyponatremia (s.sodium<135mEq/L) &0ut of33(33%) cases 17(51.5%) cases had mild hyponatremia i.e. s.sodium 131-134mEq/L, 14(42.5%) cases had moderate hyponatremia i.e. s.sodium 126-130mEq/L & 2(6%)cases had severe hyponatremia i.e. s.sodium <125mEq/L. These Children with hyponatremia were evaluated for plasma osmolality, urinary sodium and osmolality on day of admission and after appropriate fluid therapy. Results: Out of these 33 cases, the probable cause of hyponatremia was the syndrome of inappropriate secretion of antidiuretic hormone in 27(81.8%) cases (as suggested by their plasma osmolality,urinary sodium and urine osmolality). Symptoms and signs indicative of severe LRIs were about one and a half times more frequent and the mean duration of hospital stay was 49.2% longer in children with hyponatremia than with isonatremia. Two children (2%) with severe hyponatremia had complications in the form of convulsions associated with transitory altered sensorium for 2-3 days. The recovery from hyponatremia with timely intervention showed a good improvement in clinical symptomology of respiratory distress and there was no mortality in the studied cases. Conclusion: Thus it is concluded that,presence of hyponatremia in LRI’s increases the morbidity of these patients in the form of prolonged hospital stay and occurrence of complications like seizures followed by deranged sensorium in some cases.