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Test Code Crbm Carbamazepine Level

Aliases

Tegretol Level

Useful For

Anticonvulsant drug

Patient Preparation

No special patient preparation required

Special Collection Instructions

When checking carbamazepine levels in a patient on a regular medication regimen, the specimen should be drawn immediately prior to the next dose (trough).

Collection Method

Venous collection

Minimum Volume

  • Adults: 1 mL
  • Pediatric: 0.8 mL

Container

Lt Green / Plasma Separator / Lithium Heparin

Preferred Specimen

Light Green Top (lithium heparin) plasma

Acceptable Specimens

Serum:

  • Gold Top SST
  •  
  • Red Top


Plasma:

 

  • Light Geen Top (lithium heparin)
  • Purple or Pink top (K2/K3 EDTA)
  • Dark Green Top (sodium heparin)

 

Reference or Target Ranges

 4 – 12 ug/mL
 

Reportable Units

ug/mL

Critical Value

>15 ug/mL

Reasons for Rejection

 


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Hemolysis Threshold 500 mg/dL
Icterus Threshold 20 mg/dL
Lipemia Threshold 700 mg/dL
Other QNS, contaminated, improperly Labeled, improper specimen type

Specimen Stability

 


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Ambient 2 days
Refrigerated (4°C to 8°C) 7 days
Frozen(-40°C to 0°C) 4 weeks

Performance Information

 


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Days and Time Performed 24/7
Expected Turn Around Time Stat: 1 hour
Routine: 4 hours
Stat Availability Yes
Performing Bench UH Chemistry
Methodology/Method Description Siemens Atellica – Immunoassay

CPT Codes

80156