Barley, IgE, Serum
Use
This test is useful for establishing a diagnosis of an allergy to barley, defining the allergen responsible for eliciting signs and symptoms, identifying specific allergens for an allergic response or anaphylactic episode, confirming sensitization before immunotherapy, and investigating allergic reactions to insect venom, drugs, or chemical allergens. It provides insight into the immune response to allergens associated with allergic disease, helping diagnose immediate hypersensitivity diseases caused by IgE-mediated effector cell activation.
Special Instructions
Collection involves centrifuging and aliquoting serum into a plastic vial. The test should not be used to determine residual clinical sensitivity after immunotherapy or when medical management does not require allergen specificity.
Limitations
Testing for IgE antibodies is ineffective for patients previously treated with immunotherapy if the presence of residual clinical sensitivity is not a concern. False positives may occur in patients with non-specific IgE binding and elevated serum IgE (>2500 kU/L). The test results should be interpreted within the clinical context, considering that some individuals may show measurable IgE levels without significant clinical sensitivity.
FDA ApprovedNew York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 6037-6
- 6037-6
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
Container
Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Causes for Rejection
Gross hemolysis: OK; Gross lipemia: OK
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |