Phenobarbital, Grand Itasca


Sunquest Code:GHPHEN  
Epic Code:LAB7042Epic Name:Phenobarbital GH
Methodology:Homogenous enzyme immunoassay
CPT Code:80184
Turnaround Time:Performed and reported 24 h/day.


Collection Instructions

Specimen:Blood
Optimal Volume:2.5 mL
Minimum\Peds Volume:0.8 mL
Container:Green (lithium heparin, gel) (Red (no gel))
Collection Instructions:Trough level is preferred; collect immediately before dose. It is advisable to monitor at the same time in the dosing schedule.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1.25 mL, 0.3 mL minimum. Store at room temperature up to 48 horus. Alternatively, refrigerate.
Shipping Instructions:Ship at room temperature to arrive within 48 hours. Alternatively, ship at refrigerated temperature.
Test Performed at or Referral Lab Chemistry  (Grand Itasca GICH)


Interpretive

Critical Range:Greater than 50.0 ug/mL
Reference Range:10-40 ug/mL
Use:Monitor therapeutic drug level of phenobarbital; use with primidone levels to monitor therapeutic drug level of primidone; evaluate phenobarbital tixicity. Half-life is 50-120 h (adult); and 40-70 h (child).


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