| Test Name: |
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Microalbumin Excretion Rate
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| Test Code(s): |
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UALBX / UMAU
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| CPT Code(s): |
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82043
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| Test Description: |
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Test Component: Urine albumin, collection volume and period.
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| Methodology: |
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Nephelometry
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Routine: 4 hours.
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Specimen Requirements
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| Specimen: |
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Overnight timed urine
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| Patient Preparation: |
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No vigorous exercise during 4 hours prior to collection. Patients should not collect urine specimen during menses, since blood in the sample may affect test results.
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| Collection Instructions: |
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Collect all urine excreted during the patient's sleep period including the first morning void. Collection container must be free of any preservatives. For a timed collection, indicate date and time collection started and date and time collection finished. Timed collections must be for a period of 22-26 hours.
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| Collection Container: |
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Preferred: 24 hour urine container
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| Collection Volume: |
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Preferred: Entire collection
Pediatrics: Entire collection
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| Sample Analyzed: |
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Urine aliquot
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| Volume Required: |
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Preferred: 1 mL
Pediatrics: 0.4 mL
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| Specimen Processing: |
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Indicate collection period and volume. Mix specimen. Transfer 5 mL into a screw cap container. Do not freeze.
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| Specimen Transport: |
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Transport entire specimen to UWHC Core Laboratory (B4/220) at close of collection. Transport with coolant pack if coming from outreach location.
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| Unacceptable Criteria: |
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Collection container contaminated with preservative is not acceptable.
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| Stability: |
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Refrigerated: 7 days
Frozen: Not acceptable
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Interpretation
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Reference Interval:
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2 years and up (male and female): 0.0-19.9 mcg/min
Interpretive Guidelines:
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< 20.0 mcg/min
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Normal |
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20.0-199.9 mcg/min
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Microalbuminuria |
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> 199.9 mcg/min
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Clinical albuminuria |
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