Formaldehyde, IgE, Serum
Use
Establishes the diagnosis of an allergy to formaldehyde by identifying the allergen responsible for eliciting signs and symptoms. It is used to confirm sensitization prior to starting immunotherapy and to investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens. It helps determine allergens responsible for an allergic response or anaphylactic episode. However, it is not useful for patients previously treated with immunotherapy when determining residual clinical sensitivity or when allergen specificity is not required for medical management.
Special Instructions
If not ordering electronically, complete, print, and send an Allergen Test Request (T236) with the specimen.
Limitations
False-positive results for IgE antibodies may occur in patients with significantly elevated serum IgE (>2500 kU/L) due to nonspecific binding to allergen solid phases. Some individuals with clinically insignificant sensitivity to allergens may still have measurable levels of IgE antibodies in their serum. Test results must be interpreted within the clinical context.
New York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 6119-2
- 6119-2
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
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 |