Serum creatinine is useful in the evaluation of kidney function and in monitoring renal dialysis. A serum creatinine result within the reference range does not rule out renal function impairment.
Creatinine, like urea, is a waste product of bodily processes. The kidneys control its elimination from the blood. A rise in creatinine within a health screening, especially if urea levels are also high, will usually mean there is a degree of compromise of the kidneys. Small rises can be a sign of dehydration. Low levels are of no concern.