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Albumin, 24-Hour Urine with Creatinine
Test Code15281
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
5 mL urine aliquot from a well-mixed 24-hour urine collection submitted in a plastic leak-proof container - no preservative
Minimum Volume
2 mL
Other Acceptable Specimens
Urinalysis transport tube (yellow-top, blue fill line, preservative tube)
Instructions
Specify 24-hour total volume on container and test requisition.
Note: Exercise within 24 hours, infection, fever, congestive heart failure, marked hyperglycemia, and marked hypertension may elevate urinary albumin excretion over baseline values.
Note: Exercise within 24 hours, infection, fever, congestive heart failure, marked hyperglycemia, and marked hypertension may elevate urinary albumin excretion over baseline values.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Refrigerated: 7 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Acid preserved urine
Methodology
Turbidometric
Setup Schedule
Set up: Daily; Report available: 1 day
Clinical Significance
Albumin excreted in the urine (Microalbumin) is a sensitive marker of Nephropathy. It is used to screen for early renal disease in diabetic patients.
