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CREATINE+CREATININE, 24-HR UR
Test Code3855
CPT Codes
82540; 82570
Includes
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Creatine, urine; creatinine, urine; creatine:creatinine ratio; eGFR calculation
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Creatine, urine; creatinine, urine; creatine:creatinine ratio; eGFR calculation
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Preferred Specimen
"Urine (24-hour), frozen
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Minimum Volume
"1 mL aliquot
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Instructions
"State patient's sex and 24-hour volume on the test request form.
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Transport Container
"Plastic urine container
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Transport Temperature
freeze
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
"Thawed creatine specimen; 6N HCl, boric acid, or alkali added to collection (Acid or alkali preservative will convert creatine to creatinine, falsely lowering creatine values.)
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Methodology
"Spectrophotometry "
