Quantitative ImmunoCAP Fluorescent Enzyme Immunoassay
New York DOH Approval Status
Multiple patient encounters should be avoided.
Serum separator tube. Multiple specimen tubes should be avoided.
Separate serum from cells ASAP or within 2 hours of collection. Transfer 0.25 mL serum plus 0.1 mL for each additional allergen ordered to an ARUP Standard Transport Tube. (Min: 0.25 mL plus 0.04 mL for each allergen ordered)
Hemolyzed, icteric, or lipemic specimens.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year
(reported in kU/L)
|Probability of IgE Mediated
|Less than 0.10||No significant level detected||0|
|0.10 - 0.34||Clinical relevance undetermined||0/1|
|0.35 - 0.70||Low||1|
|0.71 - 3.5||Moderate||2|
|3.51 - 17.50||High||3|
|17.51 - 50.00||Very high||4|
|50.01 - 100.00||Very high||5|
|Greater than 100.00||Very high||6|
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.
Due to the rise and fall of circulating specific IgE antibodies to penicilloyl G or penicilloyl V, blood samples for testing should be collected no sooner that 2-3 weeks and no later than 6 months after penicillin exposure.
|Component Test Code*||Component Chart Name||LOINC|
|0099628||Allergen, Drugs, Penicil G (major) IgE||6851-0|
- ImmunoCAP c1 (Allergen, Drugs, Penicillin G (major))
- Penicillin (IV) (Allergen, Drugs, Penicillin G (major))