CPT/HCPCS
82570
Order Code
CH135
Turnaround Time
24 hours
Test Includes
Creatinine Urine Random
Specimen Requirements
Specimen Source
Urine
Transport Container
(Specimen Container)
(Specimen Container)
Plastic screw-cap container
Preferred Specimens
Urine
Collection Instructions
(Transport Temperature)
(Transport Temperature)
Transport at Room Temperature
Specimen Stability
| Temperature | Period |
|---|---|
| Room temperature | 72 hours |
| Refrigerated | 8 days |
| Frozen | 30 days |
Test Details
Methodology
Spectrophotometry
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.
Reference Ranges
15 – 278 mg/dL
