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Test Directory

3291 Creatinine Clearance

Specimen Type
Specimen Stability
Reference Range
Random Urine
  and
Serum
7 Days Refrigerated
See Report

Specimen Requirements

Specimen Type: Random Urine
Container: Sterile Container
Temperature: Refrigerated
  and
Specimen Type: Serum
Container: 1 Serum Separator Tube (SST)
Temperature: Refrigerated
Preferred Vol: 2.00 mL
Min Vol: 1.50 mL

Method

Immunoassay

Schedule

Mon-Fri

Turn-Around Time

24hrs

Instructions/Notes

24 hour urine collection and serum with notation of total volume collected.

Clinical Utility

Microalbumin is albumin excreted in the urine and is a sensitive marker of nephropathy. It is used to screen for early renal disease in diabetic patients. A random urine creatinine value can be helpful in the differential diagnosis of a ruptured urinary bladder after abdominal trauma. Extravasated urine will have high levels of creatinine and also urea nitrogen. Creatinine in urine is commonly used to evaluate patients with advanced renal failure. However, due to diurnal variation and fluid intake during the day, a creatinine clearance test should be considered as a more accurate assessment of kidney function.

CPT Codes

82565, 82570

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