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Ustekinumab and Anti-Ustekinumab Antibody, DoseASSURE™ UST
Test Code38319
CPT Codes
80299, 83520
Preferred Specimen
3 mL serum
Minimum Volume
1 mL
Note: This volume does not allow for repeat testing.
Note: This volume does not allow for repeat testing.
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube • Sodium heparin (royal blue-top) tube
Instructions
Allow a minimum clotting time of 30 to 60 minutes with serum separation within 2 hours of collection. Send serum in a plastic transport tube. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Transport Temperature
Frozen
Specimen Stability
Room temperature: 14 days
Refrigerated: 14 days
Frozen: 14 days
Refrigerated: 14 days
Frozen: 14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Lipemia
Methodology
Electrochemiluminescence Immunoassay (ECLIA)
FDA Status
These tests were developed and their performance characteristics determined by LabCorp. They have not been cleared or approved by the Food and Drug Administration.
Setup Schedule
Sets up 1 day a week.
Clinical Significance
Provides ustekinumab drug concentration and anti-ustekinumab antibodies in order to optimize treatment and facilitate clinical decision-making. This assay may be helpful in any patients on ustekinumab therapy for Crohn's disease, psoriasis, or other autoimmune conditions.
