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Epic Test Code LAB441A Protein, Total: Urine, 12 hour

Performing Location(s)

BMC

Specimen Type

12 hour urine

Volume Required

Entire collection

At least 10 mL urine needs to be submitted to testing lab.

  • Multiple test can be performed from this volume. For question please contact the lab at 547-3975.  

Preferred Container

24 hour urine collection container with no preservative

Storage Requirements

Keep urine refrigerated during the collection period.

Transportation Needs

Deliver specimen to the laboratory at the end of collection. If transportation is expected to exceed 1 hour, provisions must be made to keep the urine chilled

Causes for Rejection

Mislabeled or unlabeled specimen

Bloody specimens

Greater than 10% of total volume lost

Inappropriate urine preservative used

Specimen not refrigerated
>12 hrs room Temperature
>24 hrs Refrigereated

Limitations

This methodology is prone to aminoglycoside interference. The presence of Neomycin, Gentamicin, Tobramycin, Kanamycin, Geneticin, Streptomycin, Amikacin and/or Dihydrostreptomycin will falsely increase the Protein result in urines tested by this Fujita method.

 

Specimens with visible red cells or hemolysis should be avoided since hemolysis increases Urine/CSF Total Protein results (at 25 mg/dL hemoglobin)The sensitivity of the Urine/CSF Total Protein method is 2 mg/dL [20 mg/L] and represents the lowest concentration of urine or cerebrospinal fluid protein that can be distinguished from zero. This sensitivity is defined as the concentration of two standard deviations above the 0 mg/dL [0 mg/L] level (n=20).

Reference Values

Population Units Reference Range
All populations mg/12 hours <75

 

Includes

Urine Total Protein, Urine Protein Output

Additional Testing

A urine creatinine (CPT: 82570) is performed and billed on all requests for 12 hour urine chemistries

Additional Information

Refer to 24 hour Urine Collection procedure  while only collecting for 12 hours.

 

 

Days of Analysis

All

Methodology

Beckman AU/Dx Series

CPT Code

84156

Last Updated

30-July-19