Test directory: IgG Synthesis Rate

Ordering Code 5112
Test Name IgG Synthesis Rate
Preferred Specimen Serum and Cerebral Spinal Fluid
Preferred Container SST (Gold) and Cerebral Spinal Fluid Kit Tubes
Other Specimen/Container Cerebrospinal Fluid in Sterile Container and Serum in
Plain (Red)
Optimum Volume 1 mL Serum and 2 mL CSF
Collection Instructions CSF and serum specimens must be collected within 48 hours of each other. CSF must be crystalline clear.
Handling Instructions If CSF is bloody, then centrifuge and aliquot CSF prior to freezing.
Transport Requirements Oahu: Frozen
Airline: Frozen
Specimen Stability Ambient: 8 Hours
Refrigerated: 7 Days
Frozen: 3 Months
Rejection Criteria Hemolyzed, Received ambient at reference laboratory,
Xanthrochromia
Avail. Stat NO
Analytic Time Up to 7 Days
Methodology Fixed Rate Time Nephelometry
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of June 29, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Synthesis Rate IgG, CSF ALL See report.
IgG Index, CSF ALL See report.
Albumin, CSF ALL See report.
IgG, CSF ALL See report.
IgG, Serum ALL See report.
Albumin, Serum ALL See report.