Phthalic Anhydride, IgE, Serum
Use
This test is useful for establishing a diagnosis of an allergy to phthalic anhydride. It helps define the allergen responsible for eliciting signs and symptoms, and can identify allergens responsible for allergic responses and/or anaphylactic episodes. The test can confirm sensitization prior to beginning immunotherapy and investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens.
Special Instructions
If not ordering electronically, complete, print, and send an Allergen Test Request (T236) with the specimen. For a listing of allergens available for testing, see the Allergens - Immunoglobulin E (IgE) Antibodies document.
Limitations
Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists or in situations where medical management does not depend upon identification of allergen specificity. False-positive results may occur in patients with markedly elevated serum IgE (>2500 kU/L).
FDA ApprovedNew York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 7601-8
- 7601-8
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.
Storage Instructions
Refrigerate the specimen; it is stable for 14 days. It can also be frozen for up to 90 days.
Causes for Rejection
Gross lipemia and gross hemolysis are acceptable conditions.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |