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Lab Test Dictionary

Interleukin-18 (IL-18)

Methodology

Enzyme-Linked Immunosorbent Assay (ELISA)

Synonyms

IL18; ALPS Biomarker

Specimen Type

Serum

Performing Lab

Cincinnati Children's Diagnostic Immunology

Epic ID

Other Reference Test

Lab Test Days

Every 2 Weeks

Standard TAT

2 Weeks

Collection Information

Specimen Required

1-3 mL Blood

Container Type

Red Top (No Additive)

Processing Information - Lab Use Only

Specimen Stability

Room Temp: 24 Hours; Refrigerated: Unacceptable; Frozen: Unacceptable (6 Months for serum)

Rejection Criteria

Whole blood sent refrigerated or frozen; Serum sent room temp or refrigerated

Test Volume Required

3 mL Whole Blood or 1.5 mL Serum

Minimum Test Volume

1 mL Whole Blood or 0.5 mL Serum

Processing Instructions

Complete a Cincinnati Children's Diagnostic Immunology requisition and submit with whole blood room temp within 24 hours of collection or with serum frozen Monday-Thursday only, no weekend or holidays. If sending frozen serum, separate serum from cells within 24 hours of collection.