Specimen Requirements

Submit only 1 of the following specimens:

Preferred:

Plasma

Draw blood in a green-top (lithium heparin) tube(s). For pediatric specimens, draw blood in a green-top (lithium heparin) MICROTAINER(S)®. Spin down and send 1 mL of lithium heparin plasma refrigerated. Pharmacy recommends trough levels. Plasma for trough should be drawn 30 minutes prior to dose. 

Note:  1. Indicate plasma on request form.

2. Label specimen with patient’s name (first and last), date of birth, date and time of draw, phlebotomist’s initials, and as plasma.

Alternate:

Serum

Draw blood in a serum gel tube(s). Spin down and send 1 mL of serum refrigerated. Pharmacy recommends trough levels. Serum for trough should be drawn 30 minutes prior to dose. 

Note:  1. Indicate serum on request form.

2. Label specimen with patient’s name (first and last), date of birth, date and time of draw, phlebotomist’s initials, and as serum.