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Test Code UCR24H Creatinine, Urine, 24 hour, LAB712

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements

Container/Tube:

Preferred: 24-hour urine collection

Specimen Volume: 0.5 mL from a 24-hour timed urine collection. No preservative.

                                    Refrigerate specimen during collection, and send specimen refrigerated.

Stability: Urines should be stored at 2 - 8ºC and analyzed within 4 days.  Freeze for longer storage. 

Collection Instructions: Obtain 24-hour urine jug from laboratory
Note: 1. Starting and ending times of collection are required for processing.

           2. When a 24-hour urine for creatinine is done, a PV (period and volume) must also

                be ordered and resulted. (FOR LAB USE ONLY)

Reference Values

Males: 600-2,500 mg/24 hours

Females: 600-1,500 mg/24 hours

Useful For

Creatinine measurements are used in the diagnosis and treatment of renal diseases, in monitoring renal dialysis, and as a calculation basis for measuring other urine analytes. 

Day(s) Test Set Up

Monday through Sunday

Methodology

Enzymatic

Test Classification and CPT Coding

81050-Timed urine measurement

82570-Creatinine