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Test Code LAB441 Protein, Total, Urine, 24 Hour

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

End point Assay: Colorimetric (Benzethonium Chloride)

Literature Reference:

Package insert: U/CSF protein TPUC3. Roche Corporation, 11/2018.

Specimen Requirements

Specimen Type: Urine, 24 hour
Container/Tube: Plain, brown urine container-Specimen collected in a container with either an acid or base is not acceptable.

Specimen Volume: Entire collection

Collection Instructions: No additive. Refrigerate specimen during collection, preferred.  Room temperature acceptable for 24 hours.

Additional Information:

1. Starting and ending times of collection are required.

2. See Urine Collection information under General Information.

3. Containers with preservatives are NOT acceptable.

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: 2 to 4 hours after receipt in laboratory

Test Classification and CPT Coding

81050-Volume measurement for timed collection

84156-Protein

Reference Values

1-150 mg/24 hours

Literature Reference:

Rifai N, Horvath AR, Wittwer AT eds: Textbook of Clinical Chemistry and Molecular Diagnostics 6 th ed: Chapter 32, p. 479, Elsevier, St. Louis, MO 2018.

Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only

Analyte Stability:

Specimen must be kept refrigerated during the collection and before delivery to limit bacterial growth.

Laboratory Processing Instructions:

Test performed in BJH Core Lab. Mix urine well. Record volume, period, and pH on request form. Using 13x100 test tubes, prepare a 7-mL aliquot and deliver to the automated line for centrifugation and delivery to Cobas 8000 for analysis. Completed specimen is stored refrigerated for 5 days.

Special Instructions

See Urine Collection information under General Information.

See Analyte Stability Chart under General Information for a complete list.
 

LOINC Code Information

Name LOINC Code
Protein in 24 hour urine 2889-4
Collection duration 13362-9
Volume of urine 19153-6