Specimen Requirements

Container/Tube:  Preferred: 4.5 mL Lithium Heparin (Mint Green top PST Gel) tube

Acceptable: 5.0 mL SST (Gold top) tube or 6.0 mL Serum (Red top) tube

Specimen:  Full tube

Collection Instructions:  Draw specimen 6 hours post oral dose. For pediatrics, draw blood in two, 0.5-mL green-top MICROTAINERS®.

Note:  Label tubes with patient’s full name and 1 additional unique patient identifier such as date of birth, medical record number, emergency ID number, date and time of draw, collector’s initials, and type of specimen.