Sodium (Na) and Potassium (K)
Sodium blood levels are important, because sodium regulates the amount of water
in the body. Potassium blood levels are also important, because a high or low
potassium can cause disorders in heart rhythms.
Sodium and potassium levels should be measured as a matter of course in all
patients over 65.
Underlying Diseases/Conditions
Patients with renal disease, diabetes, or a neurological disease should be
tested for sodium and potassium levels.
Current Drugs Use
Sodium and potassium levels should be investigated in those patients who are
taking diuretics, digoxin or steroids.
