Test Overview
Test Methodology

Enzyme-Linked Immunosorbent Assay (ELISA)

Test Usage

Therapeutic drug monitoring.

Reference Range *

USTEKINUMAB QN, S: Limit of quantitation is 0.3 mcg/mL
In inflammatory bowel disease, at post-induction measurement (week 8), concentrations above 3.5 mcg/mL are associated with good outcomes
For maintenance stages:
Concentrations > or =1.0 mcg/mL are associated with clinical response and clinical remission
Concentrations > or =4.5 mcg/mL are associated with mucosal healing

USTEKINUMAB AB, S: Limit of quantitation is 10 AU/mL
Absent: <10 AU/mL
Present: > or =10 AU/mL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Monday, Wednesday, Friday
Analytic Time

3 - 7 days

Soft Order Code
USTEK
MiChart Code
USTEK
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo USTEK
    Section
    Special Testing
    Specimen Requirements
    Collection

    Collect trough specimen in an SST or red top tube. Spin and aliquot serum into a screw capped plastic tube. Send to Specimen Processing refrigerated

    Special Handling

    Collect trough specimen in an SST or red top tube.

    Normal Volume

    0.5 mL serum

    Minimum Volume

    0.4 mL serum

    Storage Temperature
    Refrigerated preferred, frozen acceptable
    Additional Information

    Test sent to Mayo Clinic Laboratories

    Billing
    CPT Code
    80299, 83520
    NY State Approved
    No