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Test Code LAB195 Protein, Cerebrospinal Fluid (CSF)

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Colorimetric (Benzethonium Chloride)

Literature Reference:

Package insert: U/CSF protein reagent TPUC3. Roche Diagnostics, 12/2018.

Specimen Requirements

Specimen Type: CSF
Container/Tube: 7-mL screw-capped, plastic vial ; See Body Fluid Collection Guidelines under Special Instructions

 

Specimen Volume: 1 mL

 

Additional Information: Specimen source is required.

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: not available

Test Classification and CPT Coding

84157

Reference Values

<2  months: 20 - 110 mg/dL

2-4 months: 15 - 80 mg/dL

> 4 months: 5-45 mg/dL


Critical result (automatic call-back): 

≥ 150 mg/dL for 0-19 years

≥ 200 mg/dL for >19 years

Literature Reference:

1. Rifai N, Horvath AR, Wittwer AT eds: Textbook of Clinical Chemistry and Molecular Diagnostics 6 th ed: Chapter 28, p. 373, Elsevier, St. Louis, MO 2018.

2. Watson MA, Scott MG; Clinical Utility of Biochemical Analysis of Cerebrospinal Fluid. ClinChem 1995; 41:343.

Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only

Laboratory Processing Instructions:

Test performed in BJH Core lab. If specimen is received in a VACUTAINER, check procedure to confirm suitability. Centrifuge upon receipt. Apply blue tape to specimen aliquot tube. Deliver to the Cobas 8000. Completed specimen is stored frozen for 30 days. 

Special Instructions

See CSF Collection information under General Information.

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

LOINC Code Information

Name LOINC code
Protein, Cerebral Spinal Fluid 2880-3
Albumin, Cerebral Spinal Fluid 1746-7