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Creatinine, Urine Random
MessageTest performed at York Hospital Laboratory.
Test Code
UCRE
CPT Codes
82570
Preferred Specimen
5 mL random urine, submitted in a plastic leakproof container
Minimum Volume
1 mL
Transport Temperature
Refrigerated
Specimen Stability
Room temperature: 3 days
Refrigerated: 5 days
Frozen: Indefinite
Refrigerated: 5 days
Frozen: Indefinite
Methodology
Spectrophotometry
Setup Schedule
Daily
Report Available
Next Day
Reference Range
None established
Clinical Significance
Daily creatinine production is fairly constant except when there is a massive injury to muscle. The kidneys excrete creatinine very efficiently and blood levels and daily urinary excretion of creatinine fluctuate very little in healthy normal people. Since blood and daily urine excretion of creatinine show minimal fluctuation, creatinine excretion is useful for interpreting other urine tests.
