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Creatinine, Urine Random

Order Code CH135
Turnaround Time 24 hours
Test Includes

Creatinine Urine Random

Specimen Requirements
Specimen Source
Transport Container
(Specimen Container)

Plastic screw-cap container

Preferred Specimens
Collection Instructions
(Transport Temperature)
Transport at Room Temperature
Specimen Stability
Temperature Period
Room temperature 72 hours
Refrigerated 8 days
Frozen 30 days
Test Details
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