Why get tested? As part of an investigation of a bleeding or thrombotic episode; to monitor unfractionated (standard) heparin anticoagulant therapy
When to get tested? When you have unexplained bleeding or blood clotting; when you are on unfractionated (standard) heparin anticoagulant therapy; sometimes as part of a pre-surgical screen
Sample required? A blood sample drawn by needle from a vein in the arm
This article was last reviewed on May 19, 2007.
This page was last modified on April 8, 2009.
The review date indicates when the article was last reviewed from beginning to end to ensure that it reflects the most current science. A review may not require any modifications to the article, so the two dates may not always agree.
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