Quick Reference
- Full form
- Activated Partial Thromboplastin Time
- Sample type
- Blood
- Fasting
- Not required
- Marker measured
- 1
- Report turnaround
- Same day
- Available at
- All locations
About APTT (PTTK)
APTT measures how long it takes your blood to clot through one of the two main clotting pathways in your body. It is commonly ordered before surgery, when investigating unexplained bruising or bleeding, or to monitor patients on certain blood thinning medications.
No fasting is required, and because clotting results can be affected by certain medications, tell your doctor about any blood thinners you are taking before the test. Results are ready the same day.
How to Prepare
- No fasting required.
- Tell your doctor about any blood thinners you're taking before this test.
Frequently Asked Questions
What does an APTT test check?
It measures how quickly your blood clots through one of the main clotting pathways, useful before surgery or when investigating bleeding disorders.
Do I need to fast before an APTT test?
No fasting is required.
Can medications affect my APTT result?
Yes, blood thinning medications can significantly affect this result, so always tell your doctor what you are taking.
Why is APTT checked before surgery?
It helps doctors confirm your blood clots normally, reducing the risk of excessive bleeding during the procedure.
How soon will my report be ready?
Same day.
Is home sample collection available?
Yes, in all City Care Lab service areas.
This page provides general health information and is not a substitute for medical advice. Speak with your doctor about your specific results and treatment.