[Hyponatremia in children with liver cirrhosis: Treatment strategies]

Hyponatremia is a common hydroelectrolytic disorder in pediatric patients with advanced cirrhosis. This complication is related to the alteration in the renal capacity to eliminate free water with solutes such as sodium, which leads to disproportionate water retention, a condition known as dilutional hyponatremia. The main pathogenic factors are the non-osmotic secretion of antidiuretic hormone and the activation of the renin-angiotensin-aldosterone axis and the sympathetic nervous system. Given that hyponatremia in cirrhosis is associated with an increase in morbidity and mortality, the objective of this review is to propose a systematic approach, based on the level of serum sodium, assessment of hemodynamic status and diuresis, which allows precise modifications that minimize negative impacts on survival and neurological sequelae.