Eosinophil Derived Neurotoxin

Test Overview

Test Methodology

Fluorescence Enzyme Immunoassay (FEIA)

Test Usage

Evaluating patients suspected to have a condition associated with eosinophilia or hypereosinophilia. Evaluating patients with elevated peripheral blood eosinophil counts. Managing patients with elevated eosinophil-derived neurotoxin in the context of eosinophil-associated diseases

Reference Range *

<70 mcg/L: Normal
70-99 mcg/L: Borderline
> or =100 mcg/L: Elevated

Test Details

Days Set Up

Tuesday

Analytic Time

3 - 9 days

Soft Order Code

EDN

Laboratory

Sendout

Reference Laboratory

Mayo EDN

Section

Special Testing

Specimen Requirements

Collection Instructions

Collect specimen in an SST or red top tube. Spin and aliquot into a screw capped plastic tube within 12 hours of collection. Send to Specimen Processing refrigerated.

Special Handling

Serum cannot sit on either gel or cells for longer than 12 hours.

Normal Volume

0.5 mL serum

Minimum Volume

0.3 mL serum

Storage Temperature

Refrigerated preferred; frozen acceptable

Additional Information

Test performed by Mayo Clinic Laboratories

Billing

CPT Code

83520

NY State Approved

No