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Test Code UTPCRR Protein / Creatinine Ratio, Urine LAB743

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements

Container/Tube:

Preferred: Random Urine Collection

Acceptable:  24 hour collection

Specimen Volume: 1 mL from a random or 24 hour urine collection.

Stability: Specimens may be stored at 2-8° C for up to one week.  Do not freeze.

Collection Instructions: Samples containing amikacin, gentamicin, kanamycin, and tobramycin should be avoided since these substances falsely increase urine protein results.

Reference Values

No reference range

Useful For

Urine creatinine measurements are used to assess kidney function and in the diagnosis and treatment of renal disease.  Protein measurements in urine are used in the diagnosis and treatment of disease conditions such as renal disease, heart disease, or thyroid disorders, which are characterized by proteinuria or albuminuria.

Day(s) Test Set Up

Monday through Sunday

Methodology

Urine protein:  pyrogallol red

Urine creatinine:  enzymatic

Test Classification and CPT Coding

84156-Total Protein
82570-Creatinine