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Partial thromboplastin time test results are the number of seconds your blood needs to make a clot. A clotting time between 25 and 35 seconds is in the partial thromboplastin time normal range. This normal range may vary a bit from lab to lab.
With the PT test, the reference range is between 11 to 13.5 seconds if you are not on anticoagulants. A number higher than the reference range means your blood is taking longer than usual to clot. A number lower than the reference range means that your blood is clotting faster than normal.
A typical aPTT value is 30 to 40 seconds. If you get the test because you’re taking heparin, you’d want your PTT results to be more like 120 to 140 seconds, and your aPTT to be 60 to 80...
The average time range for blood to clot is about 10 to 13 seconds. A number higher than that range means it takes blood longer than usual to clot. A number lower than that range means blood clots more quickly than normal.
A partial thromboplastin time (PTT) test measures the time it takes for a clot to form in a blood sample. It helps find bleeding and clotting disorders. Learn more.
PTT test results are measured in seconds. Normal results are typically 25 to 35 seconds. This means that it took your blood sample 25 to 35 seconds to clot after adding the chemicals.
A partial thromboplastin time (PTT) test measures the time it takes for a blood clot to form. Normally, when you get a cut or injury that causes bleeding, proteins in your blood called coagulation factors work together to form a blood clot.
Measured in seconds to clot formation, normal PTT can vary based on the laboratory or institution; however, normal PTT is between 25 to 35. PTT ranges are used to classify heparin dosing schemes as low or high intensity and to ensure effective dosing.
Normal Results. In general, the PTT should be 25 to 35 seconds. If the person is taking blood thinners, clotting takes longer. Normal value ranges may vary slightly among different labs. Some labs use different measurements or may test different specimens. Talk to your provider about the meaning of your specific test results.
Normal PTT values range from 25 to 35 seconds. Prolonged PTT may signify deficiencies in these clotting factors, hemophilia, or the presence of inhibitors. Shortened PTT, on the other hand, may indicate an increased risk of thrombosis and could be associated with elevated factor VIII levels.