Carbamazepine, Free, Serum or Plasma

CPT: 80157
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Test Details

Synonyms

  • Carbatrol®
  • Epitol®
  • Equetro®
  • Free Carbamazepine
  • Tegretol®

Methodology

Ultrafiltrate assayed by immunoassay

Reference Interval

Therapeutic: 0.6−4.2 μg/mL

Specimen Requirements

Specimen

Serum or plasma

Volume

3 mL

Minimum Volume

1 mL

Container

Red-top tube or green-top (heparin) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.

Collection

Transfer separated serum or plasma to a plastic transport tube. Draw just prior to next dose.

Storage Instructions

Room temperature

Stability Requirements

Temperature

Period

Room temperature

14 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Causes for Rejection

Gel-barrier tube

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
070748 Carbamazepine, Free, Serum 3433-0 070748 Carbamazepine, Free, Serum ug/mL 3433-0
Reflex Table for Carbamazepine, Free, Serum
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 007000 See below: 007000 See below: N/A

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