Tests:Activated Partial Thromboplastin Time, Plasma: Difference between revisions
Tests:Activated Partial Thromboplastin Time, Plasma
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Revision as of 14:50, 8 September 2025
APTT is part of a coagulation screen
Overview | |
|---|---|
| Department | Haematology |
| Test Code | TAPT |
| Synonyms | APTT
PTT Activated Partial Thromboplastin Time Coagulation screen |
| Base Lab Availability | Monday - Sunday, testing routinely available out of hours |
| Hawera Lab Availability | Monday - Friday 8 am - 5pm |
| Turnaround Time | 0.5 – 4 hrs |
| Stability – Add test | 12 hours at room temperature
2 hours for Unfractionated heparin monitoring |
Specimen Requirements | |
| Specimen | Plasma |
| Preferred | 2.7mL Na citrate Blue-Top |
| Acceptable | |
| Unacceptable | Clotted specimen
Under or overfilled Moderately haemolysed Specimen older than 12 hours Unfractionated heparin monitoring older than 2 hours |
| Specimen Transportation | Room temperature |
| Paediatric Requirements | 1 mL Na citrate Blue-Top |
Aliquot Requirements | |
| Sample | |
| Preferred Volume | |
| Minimum Volume | |
| Aliquot Transportation | |
Clinical Information | |
| Reference Intervals | Reference Range - 23-38 seconds
Paediatric range - contact laboratory Therapeutic range -(unfractionated heparin) 50-80 seconds |
| Test Method | Mechanical clot detection performed on Stago Compact Max2 Analyser |
| Advanced Notice | Not required |
| Patient Preparation | Not required |
Comments | |
| Please give all clinical details, including all medication.
If the patient is on unfractionated heparin, request APTT only. Please indicate if patient is on low molecular weight heparin (Clexane). | |
| Owner | Chris Greenwood (Cge) |
|---|---|
| Last reviewed | 08.09.2025 |
| Next review | 08.09.2026 (Overdue) |