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Ustekinumab Quantitation with Antibodies, Serum
Test Code39986
CPT Codes
80299, 83520<br><strong>This test is for New York patient testing only. For non-New York patient testing use test code 18217.</strong>
Preferred Specimen
0.5 mL serum
Patient Preparation
Collect immediately before the next dose of drug administration (trough level)
Minimum Volume
0.35 mL
Instructions
Collect immediately before the next dose of drug administration (trough level)
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 21 days
Frozen: 21 days
Refrigerated: 21 days
Frozen: 21 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Heat-inactivated specimen
Methodology
Enzyme Linked Immunosorbent Assay (ELISA)
Setup Schedule
Set up: Tues, Fri; Report available: 1-4 days
Clinical Significance
Evaluation of loss of response to therapy.
Quantification of ustekinumab in human serum.
Trough level quantitation for evaluation of patients treated with ustekinumab.
Detection of antibodies to ustekinumab in human serum.
Quantification of ustekinumab in human serum.
Trough level quantitation for evaluation of patients treated with ustekinumab.
Detection of antibodies to ustekinumab in human serum.
