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HelpTest Code IHS Coagulation Inhibitor Screen
Additional Codes
| Epic Ordering Code | LAB5056 |
| NBS code | LBC12831 |
| Service code | 12412 |
Specimen Requirements
Submit the following:
| Preferred: |
| Light Blue Top |
|
|
Processing Requirements
Submit only one of the following specimens
Specimen Type: Whole Blood
Container/Tube: 3 Light Blue Top (3.2% Sodium Citrate)
Volume: 3 × 2.7 mL 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: 3.0 mL 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 hr of collection.
3. Plasma should be separated into 3 aliquots with minimum volume of 1.0 mL each.
4. Freeze the aliquots in well-closed plastic tubes immediately.
Specimen Stability
| Specimen Type | Plasma |
|---|---|
| Ambient | 4 hours |
| Refrigerate | Not available |
| Frozen | 14 days (preferred) |
Specimen Condition
| Gross Haemolysis | Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others: Clotted or insufficient specimen | Reject |
Methodology
APTT-Based Coagulation Test
Days and Times Performed
Monday through Friday, Office hours, TAT 5 days
Reference Interval
Absent
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.
Update
Last updated 22/06/2026
LOINC Code Information
50391-2
Alias
Inhibitor Screen
Non-specific Inhibitor Screen