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Vanderbilt Pathology Laboratory Services

Test Directory



LUPUS ANTICOAGULANT STACLOT LA (LAS)

Department: Coagulation
Test Synonym(s): Hexagonal Phase Phospholipid Testing, LAS
CPT Codes: 85597
Methodology: Clotting
Reference Range: Negative
Tube Type: Light blue top (Sodium Citrate)
Specimen: Citrate plasma - platelet poor This sample requires double centrifugation if sending a frozen plasma aliquot
Alternate Specimen: None
Pediatric Requirements: Peds - 2.7 mL Neonates - 1.8 mL
Volume: 1.0 mL plasma
Minimum Volume: 1.0 mL plasma
Temperature: Room temperature, or send as a frozen plasma aliquot if sample will not be received into the lab within 4 hours. This sample requires double centrifugation if sending a plasma aliquot.
Stability: Room temperature: 4 hours
Reasons for Rejection: Clotted sample, incorrectly filled tube, sample sent as whole blood > 4 hours old.
Days Performed: Twice weekly
Times Performed: Morning
TAT: 4 days
Significance: Direct Thrombin inhibitors may interfere with this assay. High doses of Heparin can interfere with this assay.
Special Instructions: Indwelling line should be flushed with saline and 5.0 mL of blood discarded before collecting samples for coagulation assays. Tube must be full and not clotted. Deliver to lab immediately. Samples received from an outside lab must be aliquoted and frozen. Samples aliquoted for shipping must be double centrifuged prior to freezing. Grossly hemolyzed, icteric or lipemic samples may be rejected.


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