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HelpTest Code HIT Anti-Platelet Factor 4 Antibody / Heparin Induced Thrombocytopenia
Additional Codes
| Epic Ordering Code | LAB3040584 |
| NBS code | LBC02020 |
| Service code | 12436 |
Specimen Requirements
Submit the following:
| Preferred: |
| Red Top Tube |
|
|
Processing Requirements
Specimen Type: Serum
Container/Tube: Red Top
Volume: 5.0 mL
Minimum Volume: 1.0 mL serum
Collection Instructions:
1. Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
2. Serum should be separated into 2 aliquots with minimum volume of 1.0 mL each.
3. Freeze the serum in well-closed plastic tube immediately.
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | Reject |
| Refrigerate | 2 days |
| Frozen | 14 days (preferred) |
Specimen Condition
| Gross Haemolysis | Reject |
|---|---|
| Gross Icterus | Reject |
| Gross Lipaemia | Reject |
| Others | Not applicable |
Methodology
Chemiluminescent Immunoassay (CLIA)
Days and Times Performed
Monday through Friday, TAT 7 days
For weekend request, please contact the haematology laboratory at 67725320 to make special arrangements.
Reference Interval
Negative
Testing Laboratory
National University Hospital
Haematology, 67725320
Useful For
Useful in evaluation of possible immune-mediated type II Heparin-Induced Thrombocytopenia (HIT-II).
Update
Last updated 22/06/2026
Alias
APF4
Heparin induced antibody
LOINC Code Information
57761-9