Pre-test preparation or requirements
• 24 hr urine is collected alongwith one serum sample.
Significance of test
Creatinine clearance is used for GFR estimation as creatinine clearance is supposed to be equal to GFR.
Stage of Chronic Kidney Disease GFR
Stage 1: Normal Kidney Function >90 ml/min
Stage 2: Mild Loss of Kidney Function 60-89 ml/min
Stage 3a: Mild to Moderate Loss of Kidney Function 45-59 ml/min
Stage 3b: Moderate to Severe Loss of Kidney Function 30-44 ml/min
Stage 4: Severe Loss of Kidney Function 15-29 ml/min
Stage 5: Kidney Failure <15 ml/min