Why get tested?
To determine the cause of and monitor treatment for illnesses associated with abnormal sodium levels in the body

When to get tested?
If you are experiencing dehydration, oedema, problems with blood pressure, or have non-specific symptoms; as part of routine laboratory evaluations, or to monitor certain long-term conditions, like high or low blood pressure

Sample required?
A blood sample drawn from a vein in the arm or, in some cases, a urine sample