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CREATININE RANDOM (URINE)

 
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Description
 

CPT Code(s)

82570

Methodology

Colorimetric • Kinetic

Reference Range(s)

≤6 Months2-32mg/dL
7-11 Months 2-36mg/dL
1-2 Years2-128mg/dL
3-8 Years2-149mg/dL
9-12 Years2-183mg/dL
>12 Years Male20-370mg/dL
>12 Years Female20-320mg/dL

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.


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