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HelpTest Code LAB3459 Soluble Interleukin-2R Level
Additional Codes
IL2R
Clinical System Name
Soluble Interleukin-2R Level
Synonyms
CD25; cytokine; cytokines; IL 2 Receptor; IL-2R; IL2R; Interleukin 2 Receptor
Sample Requirements
Specimen: Whole Blood
Container(s): Lavender/EDTA
Preferred Vol: 2.0 mL
Minimum Vol: 1.0 mL
Notes: Plasma must be separated from cells within TWO hours of collection (CRITICAL FROZEN).
Processing Instructions
Reject due to: Whole blood sent frozen or refrigerated.
Spin: Y
Aliquot: Y
Plasma: -20 C (CRITICAL FROZEN)
Storage Location: CPA freezer Fz5
Off-site Collection: Spin down and freeze plasma. Transport frozen.
Stability
| Specimen Type | Temperature | Time |
| EDTA plasma | Room temp | 30 m |
| Refrigerated | 2 d | |
| Frozen | 6 mo |
Availability
| STAT | Performed | TAT |
| N | Twice weekly | 2-7 d |
Performing Laboratory
Seattle Children's Hospital
Department
Department: Chemistry
Phone: 206-987-2565
Methodology
Method: Siemens Immulite
Analytical Volume: 0.4 mL Plasma
Limitations:
Heterophilic antibodies in human serum can react with the immunoglobulins included in the assay components causing interference with in vitro immunoassays. Samples from patients routinely exposed to animals or animal serum products can demonstrate this type of interference potentially causing an anomalous result. These reagents have been formulated to minimize the risk of interference; however, potential interactions between rare sera and test components can occur.
The drug asfotase alfa (STRENSIQ), a recombinant form of alkaline phosphatase, is expected to interere with this assay as this assay utilizes an alkaline phospatase detection system.
Reference Range
| <3 years | 398-1940 U/mL |
| 3-8 years | 144-1329 U/mL |
| ≥8 years | 137-838 U/mL |
CPT Codes
83520
Description
Primarily used for research and to support attempts to understand the pathogenesis of immune, infectious, allergic, or inflammatory disorders.