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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, 80502, if indicated)

Group/Individual Test   Group
Laboratory   Special Coagulation
Tube Station   30
Specimen Routine: 3.0 mL bloodlight blue top tube
Unspun - 4 hrs
Room Temp - 4 hrs
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
<8.0 seconds
<48.7 seconds
Normalized Ratio
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 July 22, 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