Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
Quest Diagnostics San Juan Capistrano
3-5 mL Blood
Patient should avoid alcohol, coffee, tea, tobacco, and strenuous exercise prior to collection. Overnight fasting is preferred. Patients should be relaxed in either a supine or upright position before blood is drawn. Draw specimen in a pre-chilled EDTA (lavender-top) tube. The whole blood sample should be kept on wet ice until brought to the lab.
Room Temp: 4 Hours; Refrigerated: 14 Days; Frozen: 14 Days
Heparinized plasma; Serum; CSF; Urine
2.5 mL Plasma
1.5 mL Plasma
The whole blood sample should be kept on wet ice until centrifuge (preferably at 4 degrees C) to separate the plasma within 2 hours of collection. After centrifugation, the plasma should be transferred to a plastic, leak-proof vial and immediately refrigerated.
Metanephrine, Normetanephrine, and Total Metanephrine.