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Test Code UTPCRR Total Protein Creatinine Ratio Urine, Random LAB743

Performing Laboratory

UnityPoint Finley Hospital

Test Method

Protein: Turbidimetric Method; Roche cobas Pro
Creatinine: Enzymatic Method; Roche cobas Pro

Performance

Testing is performed Monday through Sunday

Typically completed the same day the specimen arrives at the
testing site.

Specimen Requirement

2 mL urine is required.

Random urine specimens should be collected in a plastic container.  No preservative required. Label the specimen appropriately with two identifiers, patient name and another identifier, (patient ID number, DOB, etc.) include date and time of collection. Urine specimens should be assayed within two hours
of collection. If a urine cannot be run within two hours store refrigerated for up to 72 hours. Frozen samples are not acceptable.

Do not place specimen in a glass container. Do not collect specimens from patients with a urinary tract infection. Urine should not be collected during periods of exercise or prolonged upright posture. Avoid hematuria or blood contamination.

Useful For

The total protein to creatinine ratio estimates the degree of proteinuria based on a single random urine collection. Increased amounts of protein in the urine may be seen with glomerular
disease, over-flow proteinuria, urinary tract inflammation and urinary tract neoplasm. While the total protein/creatinine ratio can be used for screening or monitoring proteinuria in certain clinical situations, the 24 hour urine total collection remains the test of choice to measure true proteinuria.

Reference Values

<0.2

Reference value not established for children <2 years of age.

CPT Code Information

84156 Chemistry: Protein, total, except by refractometry, urine

82570 Chemistry: Creatinine; other source