Please login to order a test.
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
Expected steady-state trough concentrations in patients receiving recommended daily dosages: up to 50 ng/mL
Serum or plasma
Red-top tube or green-top (heparin) tube. Gel-barrier tubes are not recommended.
Trough levels are most reproducible.
Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube.
Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen. Specimen is stable for four days at room temperature, for four days refrigerated, and for 70 days frozen.
Causes for Rejection
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|