Allergen, Weed, Western Ragweed
Also known as: WRAG
Use
This test is used to measure the concentration of allergen-specific IgE antibodies to Western Ragweed in the blood. It can help identify individuals who might have an IgE-mediated allergic response to Western Ragweed, which is important for diagnosing and managing allergic conditions and reactions. The test is useful for assessing allergy lab results in conjunction with clinical history and in vivo reactivity to allergens.
Special Instructions
Multiple patient encounters should be avoided to prevent variability in results. Serum should be separated from cells as soon as possible or within 2 hours of collection to maintain sample integrity.
Limitations
Results indicating 0.10-0.34 kU/L are for specialist use as the clinical relevance is undetermined. Increasing ranges of allergen-specific IgE concentrations may not correlate with the degree of clinical response or skin testing results when challenged with the allergen. A negative test does not rule out clinical allergy or anaphylaxis, emphasizing the need for clinical correlation.
FDA ApprovedNew York Approved
Methodology
Immunoassay (Fluorescent Enzyme Immunoassay)
Biomarkers
LOINC Codes
- 6275-2
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 using a serum separator tube. Separate serum from cells ASAP or within 2 hours of collection.
Patient Preparation
Avoid multiple patient encounters.
Storage Instructions
Refrigerated transport is required.
Causes for Rejection
Hemolyzed, icteric, or lipemic specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 48 hours |
| Refrigerated | 2 weeks |
| Frozen | 1 year |
Other tests from different labs that may be relevant