Reviewed: 16. April 2026
PTT Partial Thromboplastin Time (PTT)
Unit: Sekunden
Quick Explanation
PTT (partial thromboplastin time) measures how quickly blood clots via the intrinsic clotting pathway. Prolonged values may indicate a clotting disorder or the effect of heparin. The test is used before surgeries and when bleeding tendencies are suspected. Discuss any abnormal values with your doctor.
📊 Reference Values
ℹ️ Reference ranges may vary slightly between laboratories. Always compare your value with the reference range from your own lab report.
🔍 Possible Causes
Value too high — possible causes
- ·Heparin therapy
- ·Hemophilia
- ·Clotting factor deficiency
- ·Von Willebrand disease
This list shows possible causes — not a diagnosis. Only your doctor can correctly interpret your result.
🩺 Questions for Your Doctor
- →Is there a clotting disorder explaining my PTT?
- →Is my heparin dose correct?
- →Do I need further clotting tests before surgery?
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Medical Disclaimer
The content on this page is for general information only and does not replace professional medical advice, diagnosis, or treatment. Always consult your doctor or pharmacist for health-related questions. Lab values should always be assessed in the context of your personal medical history.