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Feb 8, 2018

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Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Chemistry

Microalbumin/Creatinine Ratio

Microalbumin/Creatinine Ratio (UMACR) Chemistry Lab Test

Name: Microalbumin/Creatinine Ratio

Test Name: Microalbumin/Creatinine Ratio

Health Link Test Code: UMACR

LIS Test Code: UMACR

CPT Code(s): 82043, 82570

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.

Days Performed: Daily, 24 hours.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: 1 hour.

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.

Specimen: Random urine

Collection Container: Sterile screw cap container

Collection Instructions:

Collect in a urine container. No preservative necessary. First morning void is preferred. A blood-free specimen is preferred.

Collection Volume: Entire collection

Stability Refridgerated:

6 days

Stability Frozen:

Not acceptable

Sample Analyzed: Urine aliquot

Testing Volume: 1 mL

Pediatric Testing Volume: 0.4 mL

Specimen Transport:

After specimen collection is completed, transport entire specimen to the laboratory. Transport with coolant pack. If transport is delayed, keep specimen refrigerated.

Unacceptable Criteria:

Collection container contaminated with preservative is not acceptable.

Interpretation:

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)

 < 30   mg/g cret   

 Normal

 30-299 mg/g cret   

 Microalbuminuria

 > 299 mg/g cret   

 Clinical albuminuria