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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Microalbumin, Urine

Test Code(s): UALB / UMA

CPT Code(s): 82043

Methodology: Nephelometry

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 1 hour.
Routine: 4 hours.


Specimen Requirements

Specimen: Random urine

Patient Preparation: 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.

Collection Instructions: Collect in a urine container with no preservatives. First morning void is preferred. A blood-free specimen is preferred.

Collection Container: Preferred: Sterile screw cap container

Collection Volume: Preferred: Entire collection
Pediatrics: Entire collection

Sample Analyzed: Urine aliquot

Volume Required: Preferred: 1 mL
Pediatrics: 0.4 mL

Specimen Processing: Mix specimen. Transfer 10 mL into a screw cap container. Refrigerate specimen. Do not freeze.

Specimen Transport: Transport entire specimen to UWHC Core Laboratory (B4/220) at close of collection.  Transport with coolant pack if coming from outreach location.

Unacceptable Criteria: Collection container contaminated with preservative is not acceptable.

Stability: Refrigerated: 7 days
Frozen: Not acceptable


Interpretation

Reference Interval:

 2 years and up: 0-30 mg/L

 

 A microalbumin/creatinine ratio will be calculated

 whenever a spot urine microalbumin and random

 urine creatinine are ordered together.

 

 Albumin/Creatinine Ratio reference range:

 

 24 months and up (male and female): 0 - 29 mg/g cret

 

 

Interpretive Guidelines:

          Albumin Creatinine Ratio (Spot Urine)

< 30 mg/g cret  

Normal

30-299 mg/g cret  

Microalbuminuria

 > 299 mg/g cret  

Clinical albuminuria

 

Microalbuminuria Albumin

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