Hyponatraemia is a potentially life-threatening electrolyte disturbance, that requires the clinician not only to recognise and treat the underlying cause, but to also carefully manage the electrolyte disorder itself, to avoid causing osmotic demyelination within the central nervous system. In this short podcast, we'll work through an approach to managing the electrolyte disorder, using a series of calculations that will enable you to effectively and safely raise sodium concentrations to physiologically normal levels.