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HelpTest Code CARF Carbamazepine, Free, Serum
Specimen Required
Collection 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.
Children's Mercy Hospital
Note:
CMH COLLECTION: 3 mL in red vacutainer
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 |
Useful For
Monitoring unbound or free carbamazepine levels in patients where the total carbamazepine result is within the therapeutic range, but the patient is experiencing side effects
Monitoring carbamazepine (free) therapy in patients who are uremic
Reject Due To
| Gross hemolysis | Reject |
Day(s) Performed
Monday through Sunday
Report Available
Same day/1 dayReporting Name
Carbamazepine, Free, SReference Values
Therapeutic concentration: 1.0-3.0 mcg/mL
Critical value: ≥4.0 mcg/mL
Method Name
Ultrafiltration followed by Homogeneous Microparticle Agglutination Immunoassay
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80157