Activated Partial Thromboplastin Time
Coagulation and haemostasis
- Common abbreviation
- aPTT / PTTK
- Specimen
- Citrate plasma
- Indications noted in the research
- Heparin monitoring, bleeding workup
From the Docwrite test research, 11 September 2026. About the sources. This is a reference catalogue; the prescribing clinician and performing lab determine the appropriate test, sample and preparation. Package contents vary by provider.