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

SST

Specimen Preparation

Centrifuge, separate serum from gel ASAP and send 1.0 mL serum frozen 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

Methodology

Enzyme Immunoassay
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Reference Range

Adult Male: 5.4 - 24.2 nM BCE
Adult Female: 6.2 - 19.0 nM BCE
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Performing Laboratory

Quest Valencia
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