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HelpLupus Anticoagulant
Collection Requirements
Source: blood
Container: Sodium citrate light blue
Volume: 2.7 mL in vacutainer filled to the line
Turn Around Time
5-7 days
Availability
Routine
Includes
aPTT and dilute Russell's Viper Venom Time (DRVVT) screen ratio
Algorithm
If DRVVT ratio is 1.20 or above, then DRVVT mix and DRVVT confirmation will be performed
Lab Processing Instructions
Specimen: plasma
Double spin and aliquot into 2 tubes
- aPTT: Freeze if testing will not be completed within 1 hour of processing
- DRVVT: Freeze
Offsites: Send plasma on dry ice
Performing Laboratory
Adele Hall
Adele Hall Lab Section
Hematology
Instrumentation/Methodology
aPTT: Stago STAR
DRVVT: sent to Mayo
CPT
85730
85613
And 85613 X2 if appropriate