Published on April 09, 2015

Lupus Anticoagulant

Light Blue Top Tube

Tube Type

Includes: Lupus APTT with Hexgonal Phase Neutralization(HPN) as confirmatory test if required and Dilute Russell's Viper Venom Time with confirmatory test if required. See Important Comments

Test ID LAB5329
CPT Code(s) 85730, 85613 (85598, 85597, 85390 if indicated)
Group/Individual Test Group
Laboratory Special Coagulation
Tube Station 30
Specimen Routine: 3.0 mL blood light blue top tube
Stability Unspun: 4 hours
Room Temperature: 4 hours
Refrigerated: NO
Frozen 6 months
Availability Routine: 2 runs/week Monday and Thursday
Turnaround Time 3-5 Business Days
Internal Reference Testing
& Outreach Handling Instructions
Platelet poor plasma (double spun). Aliquot and freeze within 4 hours
Reference Range Normal:
Test Reference Range
Lupus APTT <48.5 seconds
HPN <8.0 seconds
DRVVT <48.7 seconds
Normalized Ratio <1.20
Comments Lupus APTT is affected by heparin.
HPN is not affected by heparin up to 1U/mL.
Dilute Russell's Viper Venom not affected by heparin up to 0.8 U/mL.

Reviewed by christopher parker on January 19, 2022

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