Allergen, Weed, Scale
Also known as: SCALE
Use
The Allergen, Weed, Scale test is designed to quantitatively measure the Immunoglobulin E (IgE) antibodies specific to the scale allergen, commonly associated with allergic reactions. This test aids in the evaluation of patients with suspected allergy to weed scale pollen. The results should be interpreted in the context of the patient's clinical history and other diagnostic tests, as IgE levels may not always correlate with clinical symptoms observed during exposure to the allergen.
Special Instructions
Multiple patient encounters should be avoided to prevent cross-contamination or variability in the IgE levels due to exposure variations. Ensure to separate serum from cells as quickly as possible—ideally within two hours of collection—to maintain specimen integrity. For detailed collection instructions for multiple allergens, refer to the 'Allergen Specimen Collection Instructions' on the ARUP Laboratories website.
Limitations
The test is designed to detect IgE levels specific to the scale allergen; however, these concentrations do not always correlate with the severity of clinical symptoms or the outcome of skin testing. Although helpful, a negative result does not rule out the possibility of an allergic reaction or anaphylaxis. The results are primarily intended for specialist use and should be interpreted along with the patient's clinical history and any in vivo testing results.
FDA ApprovedNew York Approved
Methodology
Immunoassay (Quantitative ImmunoCAP Fluorescent Enzyme Immunoassay)
Biomarkers
LOINC Codes
- 6239-8
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
ARUP Standard Transport Tube
Collection Instructions
Collect serum using a serum separator tube. Separate serum from cells ASAP or within 2 hours of collection. Transfer the serum to the designated transport tube.
Patient Preparation
Multiple patient encounters should be avoided.
Storage Instructions
Store the specimen refrigerated during transport.
Causes for Rejection
Hemolyzed, icteric, or lipemic specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 48 hours |
| Refrigerated | 2 weeks |
| Frozen | 1 year |