Allergen: Western Ragweed IgE


Abbrev Code:AWRAGW   
Order Code:LAB4300Order Name:Allergen Western Ragweed IgE
Synonyms:Ambrosia Psilostachya; Perennial Ragweed
Methodology:ImmunoCAP, fluorescent enzyme immunoassay
CPT Codes: 86003 x1
Turnaround Time:Specimens are sent to reference laboratory Mon-Sat; results are reported within 1-3 days.


Collection Instructions

Specimen:Blood
Optimal Volume:0.7 mL; 0.4 mL for each additional antigen
Container:Red or gold (gel)
Alternate Containers: Red (no gel)
Causes for Rejection:Hemolyzed, icteric or lipemic specimens.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot ASAP 0.25 mL. Add 0.1 mL for each additional allergen. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:After separation from cells: 48 hours at room temperature; 2 weeks refrigerated; 1 year frozen.
Test Performed at or Referral Lab Lab Sendouts  (ARUP)
Referral Lab number:55035


Interpretive

Reference Range:
Reporting Range (reported in kU/L) Probability of IgE Mediated
Clinical Reaction
Less than 0.10 No significant level detected
0.10 – 0.34 Clinical relevance undetermined
0.35 – 0.70 Low
0.71 – 3.50 Moderate
3.51 – 17.50 High
17.51 and greater Very High
Use:Allergen results of 0.10-0.34 kU/L are intended for specialist use as the clinical relevance is determined. Although increasing ranges are reflective of increasing concentrations of allergen-specific IgE, this may not correlate with the degree of clinical response or skin testing when challenged with a specific allergen. The correlation of allergy laboratory results with clinical history and in vivo reactivity to specific allergens is essential. A negative test may not rule out a clinical allergy or even anaphylaxis.


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