Sign in →

Test Code PT Coagulation, Prothrombin Time (PT) Plasma

Performing Laboratory

ChristianaCare:

  • Newark Campus
  • Middletown Campus
  • Wilmington Campus

 

Methodology

Clot-Based Assay

Includes International Normal Ratio (INR)

Reference Values

<6 months:  contact laboratory at 302-733-3708

>6 months:  9.5 - 12.5 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