Specimen Requirements

Separated specimens may be stored for up to 8 hours at 25°C or for up to 2 days at 2 - 8°C

Submit only 1 of the following specimens:

Plasma

Draw blood in a green-top (lithium heparin) plasma gel tube(s) 30 minutes prior to next dose for trough level. Spin down and send 1 mL of lithium heparin plasma refrigerated.

Note:  1. Indicate date and time of last dose and plasma on request form.

2. Label specimen appropriately (date and time of last dose and plasma).

Serum

Draw blood in a serum gel tube(s) 30 minutes prior to next dose for trough level. Spin down and send 1 mL of serum refrigerated.

Note:  1. Indicate date and time of last dose and serum on request form.

2. Label specimen appropriately (date and time of last dose and serum).

Unspun specimens must be transported at ambient temperature and arrive to the laboratory within one hour of draw.