Phenobarbital, Total/Unbound/Bound, Serum/Plasma
| Abbrev Code: | PHENTUB | ||
| Order Code: | LAB1250 | Order 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. |
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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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