Sign in →

Test Code CARFT Carbamazepine, Free and Total, Serum

Useful For

Monitoring carbamazepine (free and total) therapy in patients who are uremic

Profile Information

Test ID Reporting Name Available Separately Always Performed
CARTA Carbamazepine, Tot, S Yes Yes
CARF Carbamazepine, Free, S Yes Yes

Method Name

CARF: Ultrafiltration Followed by Homogeneous Microparticle Agglutination Immunoassay

CARTA: Homogeneous Microparticle Agglutination Immunoassay

Reporting Name

Carbamazepine, Free and Total, S

Specimen Type

Serum Red


Specimen Required


Container/Tube: Red top (serum gel/SST are not acceptable)

Submission Container/Tube: Plastic vial

Specimen Volume: 2 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial within 2 hours of collection.


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Refrigerated (preferred) 7 days
  Frozen  28 days
  Ambient  48 hours

Reject Due To

Gross hemolysis Reject

Reference Values

CARBAMAZEPINE, TOTAL

Therapeutic: 4.0-12.0 mcg/mL

Critical value: ≥15.0 mcg/mL

 

CARBAMAZEPINE, FREE

Therapeutic: 1.0-3.0 mcg/mL

Critical value: ≥4.0 mcg/mL

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 day

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

80156

80157

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CARFT Carbamazepine, Free and Total, S 34545-4

 

Result ID Test Result Name Result LOINC Value
CARF Carbamazepine, Free, S 3433-0
CARTA Carbamazepine, Tot, S 3432-2

Forms

If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.