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). Spin down and send 1 mL of lithium heparin plasma refrigerated. Plasma for a trough level is usually drawn 30 minutes before dose.

Note:  1. Indicate plasma on request form.

2. Label specimen appropriately (plasma).

Serum

Draw blood in a serum gel tube(s). Spin down and send 1 mL of serum refrigerated. Serum for a trough level is usually drawn 30 minutes before dose.

Note: 1. Indicate serum on request form.

2. Label specimen appropriately (serum).