Mephobarbital


Sunquest Code:MBARB  
Epic Code:LAB3605Epic Name:Mephobarbital
Synonyms:Mebaral
Methodology:Gas chromatography/nitrogen phosphorus detection
CPT Code:80345
Turnaround Time:Specimens are sent to reference laboratory Mon-Fri; results are reported within 3 days.
Special Instructions:Rapidly metabolized to phenobarbital; therefore, routine requests will be quantitated as phenobarbital only. Contact the laboratory if a separate mephobarbital result is needed.


Collection Instructions

Specimen:Blood
Optimal Volume:4 mL
Minimum\Peds Volume:1.2 mL
Container:Red (no gel) (Green (lithium heparin, no gel), Green (sodium heparin, no gel))
Collection Instructions:Usual sampling time is immediately prior to next dose (trough).


Processing and Shipping

Specimen Processing:Centrifuge and aliquot 2 mL, 0.6 mL minimum. Store at room temperature.
Shipping Instructions:Ship at room temperature.
Test Performed at or Referral Lab Lab Sendouts  (MedTox)
Referral Lab number:69


Interpretive

Critical Range:20 ug/mL or greater
Reference Range:0.8-2.0 ug/mL Expected mephobarbital concentrations are 0.8-2.0 ug/mL or 2-5% of the phenobarbital (metabolite) concentrations.
Use:Therapeutic monitoring and assess toxicity.


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