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The intrinsic clotting pathway is functioning within expected bounds.
A short PTT can be seen with acute-phase inflammation or elevated coagulation factors, and has been associated with an increased risk of a clot forming in some populations.
Usually no action is needed in isolation. Discuss with your doctor if you have a personal or family history of clots.
PTT: {{value}}s — lowThe intrinsic clotting pathway is functioning within expected bounds.
No action needed.
PTT: {{value}}s — normal (ref: {{low}}–{{high}}s)Prolongation can reflect heparin therapy, a clotting factor deficiency (especially VIII, IX, XI, XII), liver disease, or lupus anticoagulant. Interpret against any anticoagulants you are taking.
Discuss with the provider who ordered the test. If you're not on blood-thinning treatment, follow-up factor testing may be appropriate.
PTT: {{value}}s — prolongednoticeable PTT prolongation raises bleeding risk and may indicate heparin overdose or a noticeable factor deficiency.
Seek medical evaluation urgently, especially if on blood-thinning treatment.
PTT: {{value}}s — very prolongedUpload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.