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  • Activated Partial Thromboplastin Time (APTT, PTT)

Activated Partial Thromboplastin Time (APTT, PTT)

Tube Type

Test ID   LAB325
EPIC Order
  APTT
CPT Code(s)   85730
Group/Individual Test   Individual
Laboratory   Core Laboratory
Tube Station   30 Routine, 888 STAT
Specimen Routine: 2.7 mL blood/light blue top tube; see Comments for additional information
Pediatric: 1.8 mL blood/pediatric light blue top tube
Stability
Unspun 4 hrs
Refrigerate NO
Frozen 14 days
Room Temperature 4 hrs
Availability Routine: 24 hrs/day
  STAT: Yes
Turnaround Time   Stat 1 hr, Routine 2 hrs
Reference Range <6 mos: Undefined
  >6 mos: 25.1-36.0 seconds
  Critical: >165 seconds
     

Internal Reference Testing Specimen Handling Instructions:

Platelet Poor; Aliquot and Freeze within 4 hours.

Comments Deliver Immediately
Reference Range changes with reagent lot number. 

Reviewed by jcayless on April 20, 2017

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514

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