T4 Free - Thyroxine Free - Free T4
Specimen Collection Requirements
Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL green (sodium or lithium heparin PST) top tube
Allow serum to clot completely at room temperature (minimum: 30 minutes). Centrifuge and separate serum and plasma from cells ASAP.
Grossly hemolyzed specimens
AFTER SEPARATION FROM CELLS: Ambient (20-25°C): 5 days; Refrigerated (2-8°C): 7 days; Frozen (at or below -20°C): 30 days.
Samaritan Health Services Laboratories
Thursday, January 5, 2017 03:42:31 AM