Important Information about Monkeypox from NC-DHHS (5/20/2022) to All North Carolina Clinicians and Laboratorians

Prothrombin Time (PT)

Light Blue Top Tube

Tube Type

Test ID LAB320
EPIC Order PROTIME-INR
CPT Code(s) 85610
Group/Individual Test Group
Laboratory Core Laboratory
Tube Station 30 Routine: 888 STAT
Specimen Routine: 2.7 mL blood/light blue top tube; see Comments
Pediatric: 1.8 mL blood/pediatric light blue top tube
Stability
Unspun: 24 hours
Room temperature: 24 hours
Refrigerator: NO
Frozen: 14 days (platelet poor plasma only)
Availability Routine: 24 hr/day
STAT: YES
Turnaround Time Stat: 1 hour; Routine: 2 hours
Reference Range Age <6mos: Not defined
Age >6 mos: 10.3-13.4 secs (Corresponding INR: 0.9-1.1)
Critical Value: >55 secs
Comments Deliver Immediately
Reference Range changes with reagent lot number. Draw tube must be allowed to fill completely. Short draws will be rejected.

Reviewed by Christopher Parker on November 15, 2021

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