Phenobarbital, Total/Unbound/Bound, Serum/Plasma


Abbrev Code:PHENTUB   
Order Code:LAB1250Order Name:Phenobarbital, Total/Unbound/Bound
Synonyms:Luminal; Phenobarbital, Free
Methodology:Quantitative high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS)
CPT Codes: 80184 x1, 80184 x1, 80184 x2
Turnaround Time:Specimens are sent to the reference laboratory Sun-Sat; results are reported within 8-11 days.
Compliance:

Performed by a non-ARUP laboratory.



Collection Instructions

Specimen:Blood
Optimal Volume:4 mL
Minimum\Peds Volume:2 mL
Container:Red (no gel)
Alternate Containers: Purple (EDTA)
Collection Instructions:Trough levels are the most reproducible.
Causes for Rejection:Collected in gel tubes.


Processing and Shipping

Specimen Processing:Centrifuge and separate from cells ASAP or within 2 hours of collection. Aliquot 2 mL, 0.9 mL minimum. Store in refrigerator.
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
Shipping Instructions:Ship at refrigerated temperature.
Stability:3 months at room temperature or refrigerated; 80 months frozen.
Test Performed at or Referral Lab Lab Sendouts  (ARUP)
Referral Lab number:0091551


Interpretive

Critical Range:By report.
Use:Optimize drug therapy and monitor patient adherence.


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