Specimen Requirements

Plasma or serum and urine are required for this test. Plasma or serum specimen must be drawn during the 24-hour urine collection.

Urine
Submit an entire 24-hour urine collection. No preservative. Refrigerate specimen during collection, and send specimen refrigerated.

Note:  1. Starting and ending times of collection are required on request form for processing.
2. Follow instructions in “Urine Collection” in “Special Instructions” for 24-hour specimens.

Submit only 1 of the following specimens:

Preferred:
Plasma
Draw blood in a light green-top (lithium heparin gel) tube(s). Spin down, separate plasma from cells within 2 hours of draw, and send 1 mL of lithium heparin plasma refrigerated.

Note:  1. Indicate plasma on request form.

2. Label specimen appropriately (plasma).

Alternate:

Serum

Draw blood in a plain, red-top tube(s) or a serum gel tube(s). Spin down, separate serum from cells within 2 hours of draw, and send 1 mL of serum refrigerated.

Note:  1. Indicate serum on request form.

2. Label specimen appropriately (serum).