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* CARBAMAZEPINE, FREE AND TOTAL

Mnemonic

TEG TF

Synonym

Tegretol®

Includes

Total and Free Carbamazepine, % Bound

Guidelines

For information on when to collect specimen, please refer to Therapeutic Drug Monitoring (TDM) Guidelines for Pediatrics and Adults.

Specimen Collection Requirements

Collect

Preferred: serum, one 7.0 mL red top tube (no gel)

Also acceptable (if serum/plasma is removed from gel tube within 24 hours of collection): Serum or Plasma, one 5.0 mL gold (SST) or 3.0 mL mint green (lithium heparin, PST) top tube

Handling

Allow serum to clot completely at room temperature (minimum: SST - 30 minutes and red top tubes - 60 minutes). Centrifuge and separate serum or plasma from cells ASAP. If collected in tube with gel barrier, remove serum or plasma from primary tube within 24 hours.

Preferred Volume

2.0 mL Serum/Plasma

Minimum Volume

1.5 mL Serum/Plasma (3.0 mL minimum whole blood draw) 

Transport

Refrigerated (2-8°C)

Rejection Criteria

Serum/Plasma exposed to gel barrier (SST and PST) for more than 24 hours, grossly hemolyzed specimens

Stability

AFTER SEPARATION FROM GEL TUBES/CELLS: Room Temperature (18-26°C): 8 hours; Refrigerated (2-8°C): 1 month; Frozen (≤ -20°C): 3 months

Testing Information

Performed

7 days/week

Reported

24 hours

Method

EMIT

Reference Values

Therapeutic Range

Toxic Levels

CPT Codes

80156, 80157

Last Updated: Thursday, January 5, 2017 03:40:43 AM


Client Services: 503-413-1234