Casandra
Casandra Test Code QD81576Version 1 (DRAFT)
Performing Lab
Immunoglobulin G Subclass 4
Clinical Use
Order TestUse
Measurement of the IgG4 subclass of immunoglobulin G aids in the evaluation of conditions such as IgG4‑related disease and subsets of immunodeficiency/hypersensitivity disorders. It quantifies the IgG4 level in serum to support diagnostic and monitoring purposes.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Immunoassay (Other)
Biomarkers
Immunoglobulin G4
AnalyteImmunoglobulin G4 • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
3-7 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Serum
Volume
1‑2 mL serum
Minimum Volume
0.5 mL serum
Container
Red Top (No Additive)
Collection Instructions
Overnight fasting is preferred.
Patient Preparation
Overnight fasting is preferred.
Storage Instructions
Refrigerate or freeze.
Causes for Rejection
Gross hemolysis • Lipemia
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 72 Hours |
| Refrigerated | 21 Days |
| Frozen | 6 Months |