Therapeutic drug management
Trough levels are most reproducible
Dk green heparin (Li or Na), no gel
Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times to prevent clotting
Ambient - 3 days
For storage beyond three days, specimen should be refrigerated or frozen.
Immunoassay (IA); Ultrafiltration
6.0 − 20.0 µg/mL