Published on April 09, 2015

Lupus Inhibitor Panel-Lupus Anticoagulant

Tube Type

Includes: Silica Clotting Time (SCT) with confirmatory test and Dilute Russell's Viper Venom Time (DRVVT) with confirmatory test if. See Important Comments

Test ID		LAB5329
EPIC Order		LUPUS INHIBITOR PANEL
CPT Code(s)		85732 x 2, 85613 (85597, 85390 if indicated)
Group/Individual Test		Group
Laboratory		Special Coagulation
Tube Station		30
Specimen	Routine:	3.0 mL blood/light blue sodium citrate 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:	SCT Total Ratio <1.18
		DRVVT Ratio <1.23
Comments	SCT is not affected by unfractionated (UF) heparin up to 0.5 U/mL and low molecular weight (LMW) heparin up to 1.0 U/mL. DRVVT is not affected by heparin (UF and LMW) up to 1.0 U/mL.

Reviewed by J. Carr on January 14, 2026

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