UWHC Laboratory Services

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

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