Carbamazepine, Unbound (Free) and Total, serum or plasma

TEST: 954
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CPT: 80156;80157
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Synonyms

CBZ; Epoxide; Tegretol®; Carbatrol®; Epitol®

Expected Turnaround Time

1 day

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Information

FDA Cleared

Specimen Requirements

Specimen

Serum or plasma

Volume

3 mL

Minimum Volume

1.2 mL

Container

Red-top (no additive) tube or green-top (heparin) tube. Gel-barrier tubes are not recommended.

Collection

Transfer separated serum or plasma to a plastic transport tube. Trough levels are most reproducible

Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.

Test Details

Use

Therapeutic Drug Management

Methodology

Ultrafiltration; Immunoassay (IA)

Reference Interval

Total: 4.0 - 12.0 µg/mL; Unbound: 0.6 - 4.2 µg/mL