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HelpTest Code LUPS Lupus Anticoagulant Screen
Specimen Requirements
Submit only one of the following specimens
Specimen Type: Whole Blood
Container/Tube: 2 Light Blue Top (3.2% Sodium
Citrate)
Volume: 2 × 2.7mL Whole Blood (Tubes must be
full)
Collection Instructions: Send whole blood
specimens to laboratory immediately.
Specimen Type: Platelet Poor Plasma
Container/Tube: 2 Light Blue Top (3.2% Sodium
Citrate)
Submission Container/Tube:
Plastic Vial
Minimum Volume: 2.0mL Plasma
Collection Instructions:
1. Light blue top tube must be properly filled with whole
blood.
2. Whole blood specimen should be double
centrifuged and plasma separated from cells within 1 hour
of collection.
3. Plasma should be separated into 2 aliquots with minimum volume
of 1mL each.
4. Freeze the aliquots in well-closed plastic tubes
immediately.
Reference Interval
Absent
Days and Times Performed
Monday through Friday, TAT 10 working days
Methodology
Viscosity-Based Clot Detection
Service Code
12414
Update
Last updated 25/02/2020
Unacceptable Condition
| Haemolysis | Gross reject |
|---|---|
| Icterus | Gross reject |
| Lipaemic | Gross reject |
| Others | Clotted or insufficient reject |
Specimen Stability
**Preferred temperatures for storage prior to and during shipping to NUH**
| Specimen Type | Plasma |
|---|---|
| Ambient | 4 hours |
| Refrigerate | NA |
| Frozen | 14 days |
Testing Laboratory
National University Hospital
Haematology, 67725320
Useful For
Detects the presence of lupus anticoagulant, a phospholipid inhibitor. Consider this test in unexplained prolongation of APTT, recurrent abortions, thrombocytopenia or systemic lupus erythematosus.
Profile Information
- Prothrombin Time
- Activated Partial Thromboplastin Time
- LA Sensitive PTT
- Dilute Russell’s Viper Venom Test
Reflex Tests
- APTT mixing study if APTT is > 40.0 seconds
- Staclot LA
Alias
Lupus Anticoagulant
LA Sensitive PTT
Dilute Russell’s Viper Venom Test
DRVVT