Blood, Gold AND CSF, CSF Tube (MUST INCLUDE BOTH SERUM AND CSF)
Preferred Draw Volume
Blood 2.5 mL, CSF 1 mL
Minimum Draw Volume
Blood 0.5 mL
Other Acceptable Containers
Orange
Pediatric Collection
1 Full microtainer
Unacceptable Conditions
Plasma
Collection Comments
BOTH serum and CSF are required. Collect 1 mL Gold minimum, 0.5 mL serum or 2 microtainers PLUS 0.5 mL CSF minimum. For Blood Specimens: Allow Gold tube to sit for 30 minutes to form clot. Spin for 10 minutes at 1100-1300 g in a swing bucket unit or 15 minutes in a fixed angle to separate cells from serum. Refrigerate spun tube. Remember to properly label tube with patient name, DOB, test and collect date. Must send serum with CSF.
The immunoglobulin G index is used in evaluations for suspected multiple sclerosis. Patients with inflammatory diseases of the central nervous system (e.g., multiple sclerosis) may have increased IgG in their CSF. The CSF index is an indicator of the relative amount of CSF IgG compared to their serum IgG. The CSF Index is a calculated result based on the serum albumin and IgG as well as CSF albumin and IgG.
Performed
Monday - Friday; Days
Methodology
Rate Nephelometry
Reported
1-3
Performing Lab
Chemistry
Synonyms
6268
Immunoglobulin G (IgG) Index, CSF Quant
IgG Synthesis Rate
Reference Chart
CPT Codes
82784 (x2), 82042, 82040
Test Code (Outreach Synonym)
6268
Catalog Code
698946
Collection
Collect
Blood, Gold AND CSF, CSF Tube (MUST INCLUDE BOTH SERUM AND CSF)
Preferred Draw Volume
Blood 2.5 mL, CSF 1 mL
Minimum Draw Volume
Blood 0.5 mL
Other Acceptable Containers
Orange
Pediatric Collection
1 Full microtainer
Unacceptable Conditions
Plasma
Collection Comments
BOTH serum and CSF are required. Collect 1 mL Gold minimum, 0.5 mL serum or 2 microtainers PLUS 0.5 mL CSF minimum. For Blood Specimens: Allow Gold tube to sit for 30 minutes to form clot. Spin for 10 minutes at 1100-1300 g in a swing bucket unit or 15 minutes in a fixed angle to separate cells from serum. Refrigerate spun tube. Remember to properly label tube with patient name, DOB, test and collect date. Must send serum with CSF.
The immunoglobulin G index is used in evaluations for suspected multiple sclerosis. Patients with inflammatory diseases of the central nervous system (e.g., multiple sclerosis) may have increased IgG in their CSF. The CSF index is an indicator of the relative amount of CSF IgG compared to their serum IgG. The CSF Index is a calculated result based on the serum albumin and IgG as well as CSF albumin and IgG.
