Allergen: Tree, Walnut, IgE


Sunquest Code:ALWNT  
Epic Code:LAB5882Epic Name:Allergen Walnut Tree IgE
Methodology:FEIA (by ImmunoCAP)
Turnaround Time:Specimens are sent to reference laboratory Mon-Sat; results are reported within 1-2 days.


Collection Instructions

Specimen:Blood
Optimal Volume:0.5 mL plus 0.4 mL for each additional allergen ordered
Container:Red or gold (gel) (Red (no gel))
Causes for Rejection:Hemolyzed, icteric or lipemic specimens.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot within 2 hours of collection 0.25 mL plus 0.1 mL for each additional allergen ordered. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability: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:55093


Interpretive

Reference Range:

Reporting Range

(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 or greater

Very high

 

 

Use:Allergen results of 0.10-0.34 kU/L are intended for specialist use as the clinical relevance is undetermined. Even though increasing ranges are reflective of increasing concentrations of allergen-specific IgE, these concentrations may not correlate with the degree of clinical response or skin testing results 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 clinical allergy or even anaphylaxis.


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