Physician Office Specimen Requirements

Peak
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 1 to 3 hours post oral dose.
Note:  Label tube 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, type of specimen, and as peak.

Trough
Container/Tube:  3.5-mL red-top (gel) tube
Specimen:  Full tube
Collection Instructions:  Draw specimen immediately prior to dose.
Note:  Label tube 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, type of specimen, and as trough.