Immunoglobulin G, CSF Index

Abbrev Code:IGGSYN   
Order Code:LAB3569Order Name:Immunoglobulin G, CSF Index
Order Instructions:Do not order IGGSYN if OLIGO is ordered. IGGSYN is included in OLIGO.
Synonyms:IgG Synthesis Rate/Index
CPT Codes: 82042 x1, 82784 x4, 82040 x1, 82784 x1
Turnaround Time:Specimens are sent to reference laboratory Mon-Sat; results are reported within 1 day.

Collection Instructions

Specimen:Blood and CSF
Optimal Volume:2 mL blood; 1 mL CSF
Minimum\Peds Volume:1.2 mL blood; 0.5 mL CSF
Container:Sterile tube, Red or gold (gel)
Alternate Containers: Red (no gel)
Collection Instructions:Collect blood in red/black (gel) or red (plain, no gel) tube, and CSF in sterile container. Collect blood within 24 hours of CSF collection.
Causes for Rejection:Hemolyzed or grossly bloody specimens. Room temperature specimens.

Processing and Shipping

Specimen Processing:Separate serum from cells ASAP. Aliquot 1 mL; 0.5 mL minimum of serum. Centrifuge CSF to remove cellular material. Aliquot 1 mL; 0.5 mL minimum. Store both CSF and serum in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:14 days refrigerated and 6 months frozen (if frozen within 24 hours).
Test Performed at or Referral Lab Lab Sendouts  (ARUP)
Referral Lab number:50676


Reference Range:
IgG Serum 0-2 y: 242-1108 mg/dL
3-4 y: 485-1160 mg/dL
5-9 y: 514-1672 mg/dL
10-14 y: 581-1652 mg/dL
15-18 y: 479-1433 mg/dL
19 y & older: 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

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