Test Code PTT Partial Thromboplastin Time, Activated, Plasma
Performing Laboratory
ChristianaCare:
- Newark Campus
- Middletown Campus
- Wilmington Campus
Methodology
Clot-Based Assay
Reference Values
<6 months: contact laboratory at 302-733-3708
>6 months: 22-36 seconds
Physician Office Specimen Requirements
Container/Tube: 2.7-mL light blue-top
(sodium citrate) tube
Specimen: Full tube - must be filled to
exactly 2.7 mL
Collection Instructions:
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, or financial
number. Date and time of draw, collector’s initials, and type
of specimen are also required.
Day(s) Test Set Up
Monday through Sunday
Routine Turnaround Time: 4 hours
STAT Turnaround Time: 1 hour