Rye Grass, IgE, Serum
Use
Establishing a diagnosis of an allergy to rye grass and defining the allergen responsible for eliciting signs and symptoms. Identifying allergens responsible for allergic responses and/or anaphylactic episodes. Confirming sensitization prior to beginning immunotherapy and investigating the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens.
Special Instructions
For a listing of allergens available for testing, see the Allergens - Immunoglobulin E (IgE) Antibodies PDF. If not ordering electronically, complete, print, and send an Allergen Test Request form (T236) with the specimen.
Limitations
Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists or in patients in whom the medical management does not depend upon identification of allergen specificity. Some individuals with clinically insignificant sensitivity to allergens may have measurable levels of IgE antibodies in serum, and test results must be interpreted in the clinical context. False-positive results for IgE antibodies may occur in patients with markedly elevated serum IgE (>2500 kU/L) due to nonspecific binding to allergen solid phases.
FDA ApprovedNew York Approved
Methodology
Immunoassay (Fluorescence Enzyme Immunoassay (FEIA))
Biomarkers
LOINC Codes
- 7369-2
- 7369-2
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL for every 5 allergens requested
Minimum Volume
0.3 mL for 1 allergen, (0.05 mL x number of allergens) + 0.25 mL deadspace for more than 1 allergen
Container
Serum gel, Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Causes for Rejection
None
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |