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Test Code LAB384 Creatinine, Urine, Random

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Enzymatic (Creatininase)

Literature Reference:

Package insert: Creatinine CREP2 reagent. Roche Corporation, 02/2016.

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: 1 hour after receipt in laboratory
Routine: 2 to 4 hours after receipt in laboratory

Test Classification and CPT Coding

82570

Reference Values

No established reference intervals

Literature Reference:

1. Rifai N, Horvath AR, Wittwer AT eds: Textbook of Clinical Chemistry and Molecular Diagnostics 6th ed: Chapter 5, p. 1256, Elsevier, St. Louis, MO 2018. 

2. Sanger AK, Lockwood C, Snozek CL, Karon BS, Scott MG, Jaffe A. Catecholamine Interference in Enzymatic Creatinine Assays.  Clin Chem 2009; 55:1732.

Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only
Analyte Stability:

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
Creatinine in urine 2161-8