Test Details
Mnemonic
NTXS
Ordering Code
3717980
CPT-4 Code(s)
82523
Specimen Information
Patient Preparation
For monitoring therapy, baseline samples should be collected just prior to or on the day of therapy initiation. Subsequent specimens for comparison should be collected at approximately the same time of day as the baseline specimen.
Collect
Serum separator tube (SST)
Specimen Preparation
Centrifuge, separate serum from gel ASAP and send 1.0 mL serum in a screw capped plastic vial.
Alternate Specimen
Serum: Red top, remove serum from cells ASAP and send frozen
Minimum Volume
0.5 mL
Transport Temperature
Frozen
Rejection Criteria
Plasma
Stability
Room temperature: Unacceptable
Refrigerated: 24 hours
Frozen: 60 days
Refrigerated: 24 hours
Frozen: 60 days
Methodology
Enzyme Immunoassay
Reference Range
Adult Male: 5.4 - 24.2 nM BCE
Adult Female: 6.2 - 19.0 nM BCE
Adult Female: 6.2 - 19.0 nM BCE
Performing Laboratory
Quest Valencia