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Test Code Phenob Phenobarbital Level

Patient Preparation

No special patient preparation required

Special Collection Instructions

Specimen should be collected at least 6-8 hours after drug administration.

Collection Method

Venous collection

Minimum Volume

  • Adults: 0.8 mL
  • Pediatric: 0.6 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)

 

Reference or Target Ranges

10 – 30 ug/mL

Reportable Units

ug/mL

Critical Value

>50 ug/mL

Reasons for Rejection

 


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Hemolysis Threshold 1000 mg/dL
Icterus Threshold 60 mg/dL
Lipemia Threshold 600 mL
Other QNS, contaminated, improperly Labeled, improper specimen type

Specimen Stability

 


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Ambient 7 days
Refrigerated (4°C to 8°C) 7 days
Frozen(-40°C to 0°C) 1 year

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 Roche Cobas – KIMS assay

CPT Codes

80184