Specimen Collection Requirements
Trough levels are recommended.Reference ranges are based on trough levels.To obtain a trough level, draw specimen just prior to next dose or at least 12 hours after the last dose.
Serum or Plasma, one 7.0 mL red, 4.0 mL dark green (sodium heparin), 4.0 mL lavender (EDTA), or 5.0 mL gold (SST) top tube
Allow serum to clot completely at room temperature (minimum: 30 minutes). Centrifuge and separate serum or plasma within 4 hours of collection.
0.25 mL (Whole Blood 1.0 mL minimum draw)
Mint green (lithium heparin) or grey (sodium fluoroide / potassium oxalate) top tubes, grossly hemolyzed specimens
SERUM OR PLASMA: Ambient (20-25°C): 8 hours; Refrigerated (2-8°C): 1 week; Frozen (at or below -20°C): 1 year
Friday, June 21, 2019 12:56:49 AM
Client Services: 503-413-1234