Therapeutic drug management
Dk green heparin (Li or Na), no gel
Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times to prevent clotting
Refrigerated (preferred)
Ambient (OK) - 3 days
Frozen (OK)
Gel-barrier tubes are not recommended
Immunoassay (IA)
Therapeutic ranges have not been established
Expected steady state: up to10 µg/mL