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Your PTT result is normal. The intrinsic clotting pathway — the internal mechanism your body uses to stop bleeding — is functioning properly.
An very low PTT is rare and may indicate a hypercoagulable state where clotting is occurring too readily. This can be associated with cancer, certain blood disorders, or early disseminated intravascular coagulation.
Urgent medical evaluation needed to rule out serious underlying clotting disorders.
PTT/APTT: {{value}} {{unit}} — critically low (ref: {{low}}–{{high}})Your PTT is slightly below normal, which means one of your clotting pathways is slightly faster than average. In most healthy people this isn't clinically significant, but it can be worth noting in certain contexts.
Usually no action needed unless you have other clotting symptoms. Mention to your doctor.
PTT/APTT: {{value}} {{unit}} — below reference range (ref: {{low}}–{{high}})Your PTT is just below the lower end of normal. This is a minor variation that typically has no clinical impact in healthy individuals.
No action required unless you have symptoms or a clotting history.
PTT/APTT: {{value}} {{unit}} — borderline lowYour PTT result is normal. The intrinsic clotting pathway — the internal mechanism your body uses to stop bleeding — is functioning properly.
No action needed. Your clotting system is healthy.
PTT/APTT: {{value}} {{unit}} — within reference rangeYour PTT is right in the middle of the normal range, indicating that your blood's internal clotting mechanism is fully functional.
Excellent result. No concerns with your clotting pathway.
PTT/APTT: {{value}} {{unit}} — optimalYour PTT is slightly prolonged, meaning your blood takes a little longer than usual to clot through the internal pathway. This can be normal variation, or it can indicate a mild deficiency of clotting factors. It can also be seen with heparin treatment.
If you're on heparin, this may be expected. If not, let your doctor know so they can investigate.
PTT/APTT: {{value}} {{unit}} — borderline elevatedA prolonged PTT suggests a deficiency of one or more clotting factors in the intrinsic pathway. This can be caused by hemophilia A or B, von Willebrand disease, lupus anticoagulant, or heparin therapy.
Your doctor needs to investigate which clotting factor is affected and why. Avoid surgical procedures until this is assessed.
PTT/APTT: {{value}} {{unit}} — elevated (ref: {{low}}–{{high}})A critically high PTT means your blood's internal clotting mechanism has nearly broken down. You are at serious risk of uncontrolled bleeding. This level is a medical emergency.
Seek emergency medical care immediately. Do not delay.
PTT/APTT: {{value}} {{unit}} — critically elevated (ref: {{low}}–{{high}})Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.