Immunoglobulin G, CSF Index
0050676
Ordering Recommendation
Preferred test is Oligoclonal Band Profile (0080440). Index test aids in the workup of suspected multiple sclerosis.
Mnemonic
IGG SYN
Methodology
Quantitative Nephelometry
Performed
Sun-Sat
Reported
Within 24 hours  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
CSF AND serum separator tube.  
Specimen Preparation
Centrifuge and separate CSF to remove cellular material. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL CSF AND 1 mL serum to individual ARUP Standard Transport Tubes. (Min: 0.4 mL CSF AND 0.4 mL serum)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
Grossly bloody or hemolyzed specimens.  
Remarks
  
Stability
Ambient: 8 hours; Refrigerated: 8 days; Frozen: 1 year (if frozen within 24 hours)  
Reference Interval
IgG, Serum: 768-1632 mg/dL
IgG, CSF: 0.0-6.0 mg/dL
Albumin, Serum: 3500-5200 mg/dL
Albumin, CSF: 0-35 mg/dL
Albumin Index: 0.0-9.0
CSF IgG Synthesis Rate: ≤8.0 mg/d
IgG Albumin Ratio: 0.09-0.25
IgG Index: 0.28-0.66  
Interpretive Data
 
Note
 
CPT Code(s)
82784 x2; 82040; 82042
Components
Component Test Code*Component Chart Name
0050200Albumin, CSF
0050350Immunoglobulin G
0050670Immunoglobulin G CSF
0050671Albumin by Nephelometry
0050672Albumin Index
0050675CSF IgG Synthesis Rate
0080175CSF IgG/Albumin Ratio
0080180IgG Index
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Cerebrospinal fluid index
  • CSF index IgG
  • IgG, CSF Index
  • Immunoglobulin G Synthesis Rate