Test Directory

Test Code
EW18
Test Name
W18 SPECIFIC IgE
CPT Codes
86003
Included Tests
Sheep sorrel/Yellow dock ALLERGEN (W18) IgE
Expected Turnaround Time
3 - 5 days
Clinical Utility
Allergen specific IgE levels (kU/L) provide 95% Positive Predictive Values (PPV) for clinical reactivity to the specific allergen challenge.
Specimen and Container Info
Alternate Specimen:
Min. Volume External: 200 µL
Volume reflects estimated whole blood.

Note: This volume does not allow for repeat testing.
Volume External: Filled acceptable tube
Alternate Container:
Collection Instructions
Separator tubes:  Contains clot activator and gel for separating serum from cells, but not anticoagulant. Separate serum from cells as soon as the clot has formed (30 minutes). If specimen is centrifuged before clotting is complete, a fibrin clot will form on top of the cell. This may cause the gel barrier to not be intact and could cause improper separation of serum and cells, possibly affecting test results.
Processing and Submission Instructions
A copy of the script must be sent with each order.
Stability Requirements

Refrigerated

7 days
Methodology
Fluorescent Enzyme Immunoassay
Reference Intervals
<0.35 kU/L
Performing Location
Roble Road Core Laboratory
Testing Schedule
Routine, 6 times per week