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Protein and Creatinine, Random Urine

CPT 82570; 84156

Test Details

Methodology

Spectrophotometric

Result Turnaround Time

Within 1 day

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Documents

Test Includes

Creatinine; protein, total; protein:creatinine ratio

Use

Protein:creatinine ratio in a first-morning or random untimed "spot" urine specimen is recommended testing to ascertain chronic kidney disease.1 It is also used to evaluate nephrotic syndromes; work up other renal diseases, including malignant hypertension, glomerulonephritis, Goodpasture syndrome, cryoglobulinemia, toxemia of pregnancy, drug nephrotoxicity, and renal tubular lesions; manage myeloma and macroglobulinemia of Waldenström (Bence Jones proteinuria); evaluate hypoproteinemia; tubular proteinurias, including Wilson's disease and Fanconi syndrome. Albumin/Creatinine Ratio, Random Urine is a more sensitive marker of progression and regression of renal disease than urine total protein, especially when urine total protein is <300 mg/g creatinine.

Footnotes

1. Kidney Disease Outcomes Quality Initiative (K/DOQI). K/DOQI clinical practice guidelines on hypertension and antihypertensive agents in chronic kidney disease.Am J Kidney Dis. 2004 May; 43(5 Suppl 1):S1-290. 15114537

Specimen Requirements

Specimen

Urine (random)

Volume

50 mL

Minimum Volume

1 mL (Note: This volume does not allow for repeat testing.)

Container

Plastic urine container, no preservative

Collection Instructions

Collect random urine in a clean plastic container. Label the urine container with the patient's full name and the date and time of collection.

Stability Requirements

Temperature

Period

Room temperature

7 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Storage Instructions

Room temperature

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
003129 Prot+CreatU (Random) 87434-7 013672 Creatinine, Urine mg/dL 2161-8
003129 Prot+CreatU (Random) 87434-7 013664 Protein,Total,Urine mg/dL 2888-6
003129 Prot+CreatU (Random) 87434-7 100203 Protein/Creat Ratio mg/g creat 2890-2
Order Code003129
Order Code NameProt+CreatU (Random)
Order Loinc87434-7
Result Code013672
Result Code NameCreatinine, Urine
UofMmg/dL
Result LOINC2161-8
Order Code003129
Order Code NameProt+CreatU (Random)
Order Loinc87434-7
Result Code013664
Result Code NameProtein,Total,Urine
UofMmg/dL
Result LOINC2888-6
Order Code003129
Order Code NameProt+CreatU (Random)
Order Loinc87434-7
Result Code100203
Result Code NameProtein/Creat Ratio
UofMmg/g creat
Result LOINC2890-2