Serum or Plasma
Other Reference Test
1-2 mL Blood
Plasma collected in a lithium heparin (light green-top) tube (PST) is also acceptable. Draw peak level 2 hours post oral dose.
Room Temp: 4 Hours; Refrigerated: 48 Hours; Frozen: 1 Month
1 mL Serum or Plasma
0.5 mL Serum or Plasma
Do not sent specimen in original container. Serum or plasma must be separate from gel/cells and aliquoted into a freezer safe vial. Complete a Seattle Children's Miscellaneouse Specialty Testing requisition and submit with specimen frozen.