Hypernatraemia

Hypernatraemia is a condition characterised by an elevated serum sodium concentration, typically above 145 mmol/L, resulting from water loss or sodium gain. It is clinically significant as it can lead to cellular dehydration, neurological symptoms, and complications such as seizures or coma. Common associations include diabetes insipidus, where impaired water reabsorption leads to increased serum sodium levels, highlighting the need for careful monitoring and management.