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Test Code LAB689 Albumin Creatinine Ratio Urine, Random

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Microalbumin/Urine Albumin: Immunoturbidimetric Assay

Creatinine: Enzymatic (Creatininase)

Ratio (mg/g Creat): Calculation

Literature Reference:

Package insert: 

Microalbumin Tina-quant. Roche Corporation, 10/2020.

Creatinine CREP2 reagent. Roche Corporation, 02/2019.

Specimen Requirements

Specimen Type: Urine, random
Container/Tube: Urine Complete Cup Kit
Specimen Volume: 10 mL

Collection Instructions: No additive.
Additional Information: See Urine Collection information under General Information.

Day(s) Test Set Up

Monday through Sunday

Turnaround Time:
STAT: not available
Routine: 2 to 4 hours after receipt in laboratory

Test Classification and CPT Coding

82043-Microalbumin

82570-Creatinine Urine

Reference Values

The American Diabetes Association (ADA) recommends that an albumin/creatinine ratio be reported on all random urine specimens for microalbumin analysis. In accordance with ADA recommendations, the reference range for microalbumin analysis is:

<30 mg/g creatinine (milligram/gram of creatinine)

Calculated ratio above 30 mg/g CR with “<” result will flag as abnormal and will be reported as See Comment with a comment addition of “Unable to Calculate Exact Result.” 

Literature Reference:

1. Diabetes Care. 2010; 33: Supplement 1, S11-S61.

2. Rifai N, Horvath AR, Wittwer AT eds: Textbook of Clinical Chemistry and Molecular Diagnostics 6th ed: Chapter 57, p. 1160, Elsevier, St. Louis, MO 2018.

Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only

Specimen must be kept refrigerated before delivery to limit bacterial growth.

Laboratory Processing Instructions:

Test performed in BJH Core Lab. Mix urine well. Using 13x100 test tubes, prepare a 7-mL aliquot and deliver to the automated line for centrifugation and delivery to Cobas 8000 for analysis. Completed specimen is stored refrigerated for 5 days.

Special Instructions

See Urine Collection information under General Information.

See Analyte Stability Chart under General Information for a complete list.

LOINC Code Information

Name LOINC Code
Microalbumin/Creatinine panel in random urine 34535-5