Creatinine, Urine

Diagnostic Use

Creatinine is a waste product produced by skeletal muscle tissue. Creatinine is usually measured in the plasma as a biomarker of renal function.

Because creatinine is produced and excreted at a constant rate, urine creatinine concentration can be measured to assess the concentration of a urine specimen. This is particularly relevant when measuring the concentration of another analyte in urine, which can be corrected for urine concentration by expressing that analyte as a ratio to creatinine concentration (e.g. albumin/creatinine ratio).

Whilst plasma creatinine is normally measured to assess renal function, urine creatinine is measured when calculating creatinine clearance, a largely outdated method of assessing glomerular filtration.


Core Biochemistry

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Turnaround Time

3 hours

Test Code