| Methodology: |
Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometry
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| Performed: |
Tue, Fri
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| Reported: |
1-6 days
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| Specimen Required: |
Patient Prep: Specimens collected just before or within 15 minutes of the next dose represent the TROUGH levels. Specimens obtained within 15-30 minutes after the end of I.V. infusion or 45-60 minutes after an IM injection or 90 minutes after oral intake represent the PEAK level.
Collect: Plain red, lavender (EDTA), or green (sodium or lithium heparin).
Specimen Preparation: Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.6 mL)
Storage/Transport Temperature: Frozen.
Unacceptable Conditions: Separator tubes. Hemolyzed or lipemic specimens.
Stability (collection to initiation of testing): After separation from cells: Ambient: 48 hours; Refrigerated: 48 hours; Frozen: 6 months
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