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PT INR/ APTT
Test Code3040002810
Alias/See Also
1231500029
CPT Codes
8561085730
Includes
PROTIME
INR
APTT
INR
APTT
Preferred Specimen
Blue Top (Sodium Citrate) tube
Minimum Volume
Fully collected Blue Top tube
Instructions
Fully collect a Blue Top (sodium citrate) tube. Mix sample immediately by gentle inversion at least six times.
Transport Temperature
Send platelet poor plasma Frozen to -20C or less.
To obtain platelet poor plasma: Centrifuge, separate plasma, re-centrifuge, and separate plasma into a transport tube.
Specimen Stability
Refrigerated: 4 hours Frozen: > 4 hours
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Underfilled tubes
Methodology
LR, FS, ST, VB, DC, HS, EL, MN ACL TOP 750 AR, CW, HS, MV, NR - Sysmex CA660 FS ACL TOP 500 NR Sysmex CS2500
Reference Range
SEE RESULT REPORT
Performing Laboratory
ARKADELPHIA LABORATORY CONWAY LABORATORY FORT SMITH LABORATORY HEBER SPRINGS LABORATORY LITTLE ROCK LABORATORY NORTH LITTLE ROCK LABORATORY STUTTGART LABORATORY VAN BUREN LABORATORY MALVERN LABORATORY EL DORADO LABORATORY MAGNOLIA LABORATORY DREW COUNTY LABORATORY
Last Updated: August 26, 2026
