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HelpTest Code TCT Thrombin Clotting Time
Specimen Requirements
Submit only one of the following specimens
Specimen Type: Whole Blood
Container/Tube: Light Blue Top (3.2% Sodium
Citrate)
Volume: 2.7mL Whole Blood (Tube must be full)
Collection Instructions: Send whole blood specimen
to laboratory immediately.
Specimen Type: Platelet Poor Plasma
Container/Tube: Light Blue Top (3.2% Sodium
Citrate)
Submission Container/Tube:
Plastic Vial
Minimum Volume: 1.0mL 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 4 hours of collection
3. Freeze the plasma in well-closed plastic tube immediately.
Reference Interval
| Adults | 13.8 – 17.2 seconds |
|---|
Days and Times Performed
Monday through Sunday, TAT 1 day
Methodology
Photo-optical Clot Detection
Service Code
12402
Update
Last updated 02/05/2017
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
Aids in the detection of presence of heparin.
Aids in the detection of dysfibrinogenaemia and disseminated intravascular coagulopathies.
Alias
Thrombin Time
TCT
TT