Allergen, Tree, Walnut Tree
Also known as: WALNUT TR
Use
This test measures the concentration of walnut tree-specific IgE antibodies in serum using the ImmunoCAP method. The presence of IgE antibodies suggests sensitization to walnut tree allergens, which may correlate with clinical symptoms upon exposure. Positive test results may indicate an allergy to walnut trees, and the test is clinically relevant for diagnosing walnut tree allergic reactions and managing cases of suspected allergic rhinitis or other atopic conditions induced by walnut pollen.
Special Instructions
Avoid multiple patient encounters for sample collection to minimize variability. Ensure proper sample handling by separating serum from cells as soon as possible and adhering to specified temperature conditions for storage and transport.
Limitations
The test measures walnut-specific IgE antibodies but does not quantify allergenic potential directly; clinical correlation is essential. Concentrations of IgE determined do not always correlate with the severity of allergic reaction or skin test results. The test may not detect recent anaphylaxis or rule out clinical allergy in cases with a negative result. Factors like hemolysis, icterus, or lipemia can affect the reliability of test results, leading to specimen rejection.
FDA ApprovedNew York Approved
Methodology
Immunoassay (ImmunoCAP)
Biomarkers
LOINC Codes
- 33982-0
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.25 mL
Container
Serum separator tube
Collection Instructions
Separate serum from cells as soon as possible or within 2 hours of collection. Transfer serum to an ARUP Standard Transport Tube.
Patient Preparation
Multiple patient encounters should be avoided.
Storage Instructions
Refrigerated
Causes for Rejection
Hemolyzed, icteric, or lipemic specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 48 hours |
| Refrigerated | 2 weeks |
| Frozen | 1 year |