IgG4 Food Panel II
Use
The IgG4 Food Panel II is used to evaluate food-specific IgG4 levels which can assist in the management of dietary sensitivities. Although reference ranges are not clearly established, the test is used in certain clinical situations to determine foods for dietary evaluation in patients with food-related complaints. The presence of food-specific IgG4 in response to oral food immunotherapy treatments has been examined, although clinical utility and cutoffs have not been clearly defined.
Special Instructions
Draw blood in a plain red-top tube. Serum gel tubes are acceptable. Spin down and send 1.5 mL of serum refrigerated in a plastic vial. The test is not orderable for NY State clients.
Limitations
This test has not been cleared or approved by the U.S. Food and Drug Administration. The clinical utility of IgG4 tests is not clearly established, and no defined cutoff values exist. Results should be used in conjunction with clinical evaluation, potentially assisting in dietary elimination and challenge strategies.
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 56405-4
- 56186-0
- 56222-3
- 56269-4
- 56333-8
- 56338-7
- 56351-0
- 56442-7
- 56379-1
Result Turnaround Time
2-7 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1.5 mL
Minimum Volume
0.5 mL
Container
Plastic vial
Collection Instructions
Draw blood using plain red-top tube or serum gel tube, spin down and send serum refrigerated.
Storage Instructions
Refrigerate preferred for 28 days, ambient for 7 days, frozen for 365 days.
Causes for Rejection
Gross hemolysis, lipemia, or icterus
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 28 days |
| Frozen | 365 days |