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Creatinine, Quant, U24
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Test Code
24UCR
Alias/See Also
70197;
24 hour Urine Creatinine;
Creatinine, 24hr Urine;
24 hour Urine Creatinine;
Creatinine, 24hr Urine;
CPT Codes
82570
Preferred Specimen
24 hour urine specimen (minimum 1 mL). No preservative necessary
Instructions
Transport 24 urine container in sealed plastic bag
Transport Container
24-HR. Urine Collection Container
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature = n/a
Refrigerated = 1 day
Frozen = n/a
Refrigerated = 1 day
Frozen = n/a
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.
Methodology
kinetic alk picrate
Setup Schedule
7 am Monday til 10 pm Saturday
AU
AU
Report Available
1 day excluding weekends
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. Since blood and daily urine excretion of creatinine shows minimal fluctuation, creatinine excretion is useful in determining whether 24-hour urine specimens for other analytes (e.g., protein) have been completely and accurately collected.
Performing Laboratory
CompuNet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine, OH 45439
Last Updated: December 7, 2021