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Lab Test Dictionary

Lupus Anticoagulant Evaluation with Reflex (7079)

Methodology

Clot Detection


Specimen Type

Plasma

Performing Lab

Quest Diagnostics San Juan Capistrano


Epic ID

LAB01401

Lab Test Days

Monday-Saturday

Standard TAT

1-2 Days


Collection Information

Specimen Required

(three-four) 1.8 mL or (two-three) 2.7 mL Blood

Container Type

Light Blue (Sodium Citrate)


Processing Information - Lab Use Only

Transport Temperature

Frozen-Only

Specimen Stability

Room Temp: Unacceptable; Refrigerated: Unacceptable; Frozen: 90 Days

Rejection Criteria

Hemolysis; Received thawed

Test Volume Required

3 mL Platelet-Poor Plasma

Minimum Test Volume

2 mL Platelet-Poor Plasma

Processing Instructions

Platelet Poor Plasma: Centrifuge light blue-top tube 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Plasma must be free of platelets (<10,000/mcl). Freeze immediately and send frozen.


Included Tests

PTT-LA and dRVVT with Reflex Confirmations. If PTT-LA is >40 seconds, Hexagonal Phase Confirmation will be performed. If Hexagonal Phase Confirmation is positive or weakly positive, Thrombin Clotting Time will be performed. If dRVVT is >45 seconds, dRVVT Confirmation will be performed. If dRVVT Confirmation is positive, dRVVT 1:1 Mixing Study will be performed.


CPT Codes

85613, 85730; 85598; 85670; 85597; 85613


Revised

11-10-19

Initials

SL