UW Hospital and Clinics Lab Test Directory
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Microalbumin/Creatinine Ratio
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| Test Code(s): |
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UMACR
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| CPT Code(s): |
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82043, 82570
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| Test Description: |
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Test Component: Microalbumin, urine creatinine and calculated ratio. The microalbumin/creatinine ratio will also be calculated and reported if a random urine creatinine and random urine microalbumin are ordered on the same urine collection.
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: 1 hour.
Routine: 4 hours.
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Specimen Requirements
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| Specimen: |
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Random urine
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| Patient Preparation: |
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No vigorous exercise during 4 hours prior to collection. Patients should not collect the urine specimen during menses, since blood in the sample may affect test results.
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| Collection Instructions: |
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Collect in a urine container. No preservative necessary. First morning void is preferred. A blood-free specimen is preferred.
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| Collection Container: |
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Preferred: Sterile screw cap 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 Transport: |
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After specimen collection is completed, transport entire specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack. If transport is delayed, keep specimen refrigerated.
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| Outreach Specimen Transport: |
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Transport entire collection on coolant pack to UWHC Core Laboratory (B4/220).
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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 for Microalbumin/Creatinine Ratio:
24 months and up (male and female): 0-29 mg/g cret
Reference Interval for Microalbumin, urine: 2 years and up: 0-30 mg/L
Interpretive Guidelines:
Microalbumin/Creatinine Ratio (Spot Urine)
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< 30 mg/g cret
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Normal |
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30-299 mg/g cret
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Microalbuminuria |
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> 299 mg/g cret
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Clinical albuminuria |
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albumin/cret
albumin/creatinine
albumin/cret
alb/cret
albcrt
ualb/cret
ualb/creat
creatinine/albumin
creatinine/microalbumin
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