Test Overview
Test Methodology

See individual tests.

Test Usage

Detection of lupus anticoagulant.

Reference Range *

Interpretive report provided for abnormal results

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Monday and Thursday
Analytic Time

3 hours

Soft Order Code
LASAY
MiChart Code
Lupus Anticoagulant
Synonyms
  • LLA
  • Antiphospholipid Antibody (Lupus Anticoagulant)
  • Circulating anticoagulant
  • LA Screen
  • Lupus inhibitor
  • Lupus Test
  • Lupus-like anticoagulant
  • Phospholipid Antibody (Lupus Anticoagulant)
  • LA ASSAYS
  • LUPUS ANTICOAGULANT ASSAYS
  • DRVVT PT
  • DRVVT RAT
  • LA CONFIRM
  • PTT
  • TTI 1:100
  • TTI 1:1000
  • HEXAG
  • DRVVT PATIENT SECONDS
  • DRVVT RATIO
  • PARTIAL THROMBOPLASTIN TIME
  • TTI RATIO 1:100
  • TTI RATIO 1:1000
  • Tissue Thromboplastin Inhibition Test
  • Dilute Russell's Viper Venom Test
  • LAC Factor
  • Hexagonal Phospholipid Neutralization
  • Lupus-Like Anticoag Consult
  • LASAY
Laboratory
Hematopathology
Section
Coagulation
Specimen Requirements
Collection Instructions

Collect specimen in a blue top (citrate 3.2%) tube. Mix by inversion. Specimen should arrive at lab within 3 hours of collection; transport at room temperature. Alternatively, centrifuge, aliquot plasma into a plastic tube, and freeze the specimen within 4 hours of collection. Transport frozen specimen on dry ice. Collection of the blood through lines that have been previously flushed with heparin should be avoided. If the blood must be drawn through a VAD (vascular access device), the line should be flushed with 5 mL of saline and the first 5 mL of blood or six dead space volumes of the VAD discarded.

Please provide clinical history (brief description of the reason for testing, e.g., history of easy bruising and menorrhagia, family history of von Willebrand disease) and a listing of current and recent medications, including oral contraceptives, anticoagulants, and factor replacement therapy/DDAVP.

Rejection Criteria
Specimens will be rejected if not properly filled, clotted, grossly hemolyzed, or contaminated with heparin.
Contraindications
This test is non-diagnostic in the setting of Low-molecular-weight heparin/ unfractionated heparin/direct oral anticoagulant use. Test is not indicated for patients receiving anticoagulant therapy. This test is not indicated for inpatient evaluation of acute thrombosis.
Blue Top Tube
Normal Volume
Full 2.7mL tube or 1mL plasma aliquot
Minimum Volume
Full 1.8mL tube or 1mL plasma aliquot
Additional Information

Panel includes Hexagonal Phospholipid Neutralization (HEXAG), Dilute Russell's Viper Venom Test (DRVVT), Partial Thromboplastin Time (PTT), and Prothrombin Time with INR (PT7). Note that both Cardiolipin Antibody and Lupus Anticoagulant are referred to as phospholipid antibodies. Test may include pathologist interpretation of results at an additional charge. By ordering this test, the clinician acknowledges that a pathologist interpretation will be performed and billed as a separate additional charge if indicated.

Billing
CPT Code
85613, 85732, 85610, 85730
Fee Code
31143, 36566, 31105, 31106
Pro Fee CPT
85390
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