ALBUMIN, 24 HOUR URINE W/O CREATININE

Clinical Significance
Albumin, 24-Hour Urine without Creatinine - Albumin excreted in the urine (Microalbumin) is a sensitive marker of nephropathy. It is used to screen for early renal disease in diabetic patients.

Preferred Specimen(s)
5 mL urine aliquot from a well mixed 24-hour urine collection - no preservative

Alternative Specimen(s)
Urinalysis transport tube (yellow-top, blue fill line, preservative tube)

Minimum Volume
2 mL

Collection 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.

Transport Container
Plastic urine container

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 6 months
Reject Criteria
Acid preserved urine

Setup Schedule

Includes
CPT code 81050 may be added at an additional charge for volume measurement
Methodology
Turbidimetric

Reference Range(s)
Albumin, 24-hour Ur    <30 mg/24 h
Albumin, 24-hour Ur    <20 mcg/min

Alternative Name(s)
Albumin, 24-Hour Urine