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Urine Creatinine, 12 HR
MessageFor Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.
Test Code
UCR12
Alias/See Also
Creatinine (12 HOUR URINE SUBMITTED),
Creatinine (12 HOUR URINE),
URINE Creatinine,
URINE, Creatinine (12-HOUR URINE)
Creatinine (12 HOUR URINE),
URINE Creatinine,
URINE, Creatinine (12-HOUR URINE)
CPT Codes
81050, 82570
Preferred Specimen
12 hour urine specimen. No preservative necessary if kept refrigerated during collection
Instructions
Transport 12 urine container in sealed plastic bag
Transport Container
12-HR. Urine Collection Container
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature = 2 days
Refrigerated = 6 days
Frozen = 6 months
Refrigerated = 6 days
Frozen = 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.
Methodology
Spectrophotometric
Setup Schedule
Daily
Report Available
Daily
Clinical Significance
Creatinine is the endproduct of creatine metabolism. Creatine is present primarily in muscle and the amount of creatinine produced is related to total skeletal muscle mass. Daily creatinine production is fairly constant except when there is massive injury to muscle. The kidneys excrete creatinine very efficiently and blood levels and daily urinary excretion of creatinine fluctuates very little in healthy normal people.
Performing Laboratory
CompuNet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine, Ohio 45439
Last Updated: May 25, 2023