Lupus Anticoagulant Panel LAC Panel Test
Short Name: LAC Panel Test
Also known as: Lupus Anticoagulant Test, LAC Test, Antiphospholipid Antibody Panel
Lupus Anticoagulant Panel LAC Panel Test test available at DNA Labs India for ₹4,200. Uses Electromechanical Clot Detection on Whole blood samples. Results in Reports are typically available next day after sample collection.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Gottipati Vemkateswarlu
Consultant Hematologist · Reg: AMC4946
Last reviewed: September 7, 2026
Overview
The purpose of the LAC Panel test is to measure the levels of lupus anticoagulant antibodies and assess the clotting ability of the blood through parameters like APTT, PTT-LA, and dRVVT. This helps in diagnosing antiphospholipid syndrome, monitoring thromboembolic disorders, and guiding treatment to prevent complications such as blood clots and pregnancy losses.
- Test Code
- 1198
- Price
- ₹4,200
- Sample Type
- Whole blood
- Result Time
- Reports are typically available next day after sample collection.
- Fasting Required
- Yes (12 hours)
- Method
- Electromechanical Clot Detection
Sample Collection
Overnight fasting is preferred. Discontinue Heparin for 1 day and Oral Anticoagulants for 7 days prior to sampling with prior consent from your treating physician. Duly filled Coagulation Requisition Form (Form 15) is mandatory.
Method: Venipuncture
Laboratory Analysis
A blood sample of 3 mL will be drawn from a vein in your arm using standard venipuncture procedure by a trained phlebotomist.
Report Delivery
The sample will be processed according to stability guidelines and sent to the lab for analysis. Pressure will be applied to the puncture site to prevent bruising.
Timeline: Reports are typically available next day after sample collection.
Patient Instructions
About This Test
Who Should Get This Test
The purpose of the LAC Panel test is to measure the levels of lupus anticoagulant antibodies and assess the clotting ability of the blood through parameters like APTT, PTT-LA, and dRVVT. This helps in diagnosing antiphospholipid syndrome, monitoring thromboembolic disorders, and guiding treatment to prevent complications such as blood clots and pregnancy losses.
How to Prepare
- Collect 3 mL whole blood in 1 Blue Top (Sodium Citrate) tube.
- Mix thoroughly by inversion immediately after collection.
- Transport to Lab within 4 hours at room temperature.
- If transport within 4 hours is not possible, prepare Platelet-Poor Plasma (PPP) within 1 hour: centrifuge at 3600 rpm for 15 min, transfer supernatant to a clean plastic tube, centrifuge again at 3600 rpm for 15 min, and transfer supernatant to a labeled screw-capped vial.
- FREEZE IMMEDIATELY and ship frozen without thawing.
Doctor's Notes
Reviewed by Dr Gottipati Vemkateswarlu — MBBS, MD (Haematology) · Reg. No. AMC4946
"Antiphospholipid syndrome is a serious condition that can lead to thrombosis and pregnancy complications. The LAC Panel is crucial for early diagnosis and management to prevent life-threatening events."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed samples
- Incorrect tube type or insufficient volume
- Samples not collected or processed as per instructions
- Samples thawed after freezing without proper handling
Understanding Your Results
Positive for Lupus Anticoagulant
May indicate antiphospholipid syndrome or other autoimmune conditions. Further clinical evaluation and repeat testing may be needed for confirmation.
Prolonged PT, aPTT, or dRVVT ratios
Suggests coagulation abnormalities, which could be due to lupus anticoagulant, medications, or other factors. Consult a haematologist for interpretation.
Normal Results
Does not completely rule out antiphospholipid syndrome if clinical suspicion remains. Repeat testing after 12 weeks may be recommended for diagnosis.
If you experience symptoms such as unexplained blood clots, recurrent miscarriages, stroke-like symptoms, or heart issues, or if you have abnormal test results, consult a healthcare provider or haematologist for further evaluation and management.
Limitations
- ⚠False positives may occur due to medications or other conditions
- ⚠Test results may need confirmation with repeat testing
- ⚠Not definitive for APS without correlation with clinical symptoms and other tests
Risks & Considerations
- ●Minor bruising or pain at the puncture site
- ●Rare risk of infection or excessive bleeding
- ●Fainting or dizziness during blood draw
Interfering Factors
- ●Heparin therapy (discontinue for 1 day prior)
- ●Oral anticoagulants like warfarin (discontinue for 7 days prior)
- ●Liver disease or vitamin K deficiency
- ●Certain medications affecting coagulation
- ●Sample collection errors or hemolysis
Compare With Similar Tests
| Test | Lupus Anticoagulant Panel LAC Panel Test | ||||
|---|---|---|---|---|---|
| Comparison | Lupus Anticoagulant Panel LAC Panel Test |
Frequently Asked Questions
What is the Lupus Anticoagulant Panel (LAC Panel) test?
Why is the LAC Panel test recommended?
What does a positive LAC test result mean?
How is the sample collected for the LAC Panel test?
Is fasting required before the LAC Panel test?
What are the risks associated with the LAC Panel test?
How long does it take to receive the test results?
Can the LAC Panel test be done at home?
What should I do if my LAC Panel test results are abnormal?
How accurate is the LAC Panel test?
Are there any alternatives to the LAC Panel test?
Do I need a doctor's prescription for the LAC Panel test?
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