Japanese Cedar, IgE, Serum
Use
This test is useful for establishing a diagnosis of an allergy to Japanese cedar by detecting specific IgE antibodies in the serum. It helps define the allergen responsible for eliciting signs and symptoms and confirms sensitization prior to beginning immunotherapy. It may also investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens. However, testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine residual clinical sensitivity or in cases where medical management does not rely on allergen specificity identification.
Special Instructions
Not provided.
Limitations
Some individuals with clinically insignificant sensitivity to allergens may have measurable IgE antibody levels, so results must be interpreted in context. False-positive results may occur in patients with markedly elevated serum IgE due to nonspecific binding. The test is not useful for monitoring previously treated patients with immunotherapy or cases where management does not depend on allergen specificity.
New York Approved
Methodology
Immunoassay (Fluorescence Enzyme Immunoassay (FEIA))
Biomarkers
Japanese Cedar IgE
Protein
LOINC Codes
- 14035-0 - Japanese Cedar IgE Qn
- 14035-0 - Japanese Cedar IgE Qn
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
For more than 1 allergen: (0.05 mL x number of allergens) + 0.25 mL deadspace
Container
Preferred: Serum gel; Acceptable: Red top; Submission: Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Causes for Rejection
Gross hemolysis and lipemia are acceptable.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |