PTT BWH Order Code: PTT 
    Site
 
BWH
 
    System
 
SUNQUEST LAB
 
    Epic Lab Code
 
LAB325
 
    Local Code
 
PTT
 
    Specimen
 
BLOOD
 
    Container
 
Blue top tube, Na Citrate, 3 ml
 
    Collection Instructions
 
For HCT >56, CALL Hematology lab at 2-6850 for special tube preparation.
 
    Neonatal/Pediatric Instructions
 
For HCT >56, CALL Hematology lab at 2-6850 for instructions and special tube preparation for a 1.8 mL collection.

For HCT <56, 1.8 ml draw requires a specific BLUE top that says 1.8 mL 13X75MM Blood Vacutainer Sodium Citrate 3.2%  Manufacturer Item #:363080
 
    Testing Schedule
 
24 Hours
 
    Test Usage
 
Evaluate intrinsic pathway; screen for presence of classical hemophilia A and B, congenital deficiencies of prekallikrein (Fletcher factor), factors II, V, VIII, IX, X, XI, and XII.
 
    Reference Range
 
MALE/FEMALE/GENDER X

24.0 - 37.5 secs.

The neonatal/pediatric reference interval(s) and other method performance 
specifications are unavailable for this test.  Comparison of the result with clinical 
findings is recommended.
 
    Department
 
HEMATOLOGY
 
    Alternate names
 
aPTT, PTT, PARTIAL THROMBOPLASTIN TIME
 
    Send Out
 
No
 
    Category
 
CORE
 
    Last Update
 
8/23/2024 12:04:34