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HelpTest Code IHS Coagulation Inhibitor Screen
Specimen Requirements
Submit only one of the following specimens
Specimen Type: Whole Blood
Container/Tube: 3 Light Blue Top (3.2% Sodium
Citrate)
Volume: 3 × 2.7mL Whole Blood (Tubes
must be full)
Collection Instructions: Send whole blood
specimens to laboratory immediately.
Specimen Type: Platelet Poor Plasma
Container/Tube: 3 Light Blue Top (3.2% Sodium
Citrate)
Submission Container/Tube:
Plastic Vial
Minimum Volume: 3.0mL 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 3 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, Office hours, TAT 5 day
Methodology
APTT-Based Coagulation Test
Service Code
12412
Update
Last updated 25/02/2020
Unacceptable Condition
| Haemolysis | Gross reject |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| 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
Aid in the detection of circulating lupus anticoagulant.
Aid in the detection of coagulation inhibitors, e.g. Acquired Factor VIII inhibitor.
Alias
Inhibitor Screen
Non-specific Inhibitor Screen