Fosphenytoin is ProDrug of Phenytoin and is measured as Phenytoin
Gold serum separator (SST) tube
Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times to prevent clotting
Spin within two (2) hours of sample collection
Lt green plasma separator (PST)
Refrigerated (preferred) - 7 days
Ambient - 2 days
Frozen - 5 months
Chemiluminescent Micro-particle Immunoassay (CMIA)
1.2 - 2.5 µg/mL
> 3.0 µg/mL