Creatinine

Creatinine levels are an indication of kidney function. Creatinine and urea blood levels rise in renal disease.

Sodium levels should be measured as a matter of course in all patients over 65.

Underlying Diseases/Conditions

Patients with heart disease, renal disease, diabetes, or a neurological disease should be tested for creatinine levels.

Current Drugs Use

Creatinine levels should be investigated in those patients who are taking diuretics or digoxin.