Low activated partial thromboplastin time (aPTT) in a blood test

If you need to know which are the activated partial thromboplastin time (aPTT) reference ranges or you require more information about activated partial thromboplastin time (aPTT) in a blood test, you can visit normal activated partial thromboplastin time (aPTT) in a blood test.

A low activated partial thromboplastin time (aPTT) show that blood is clotting faster than normal and that increases the risk to develop a blood clot.

Shortened activated partial thromboplastin time (aPTT) occurs in:

• Extensive cancer, except when the liver is involved.
• Immediately after acute hemorrhage.
• Very early stages of DIC (later the aPTT increases).

A low activated partial thromboplastin time (aPTT) is rare. It is recommended to perform a new test again to exclude the possibility of heparin contamination or any other measurement error.

The most common diseases why the activated partial thromboplastin time (aPTT) can be lower than normal are:

If your doctor considers it appropriate he may prescribe you anticoagulant therapy, such as heparin therapy that prevent thrombosis and increase activated partial thromboplastin time (aPTT).

The following values are considered to be above the normal range:

IMPORTANT: These levels are expressed in seconds. They are an example of a healthy man/woman of about 40 years old with no known disease and not taking any medication. The ranges can be different depending on the laboratory or on your personal circumstances.