when is coag performed
However, blood moving through your blood vessels should not clot. If such clots form they can travel through your bloodstream to your heart, lungs, or brain, causing a heart attack or stroke. Coagulation tests measure your bloodâs ability to clot, as well as how long it takes.Testing can help your doctor assess your risk of excessive bleeding or developing clots (thrombosis) somewhere in your blood vessels.Most coagulation tests are given in the same manner as most blood tests. Side effects and risks are minimal. A blood sample is sent to a laboratory for testing and analysis.esting can help your doctor assess your risk of excessive bleeding or developing clots (thrombosis) somewhere in your blood vessels. Most coagulation tests are given in the same manner as most blood tests. Side effects and risks are minimal. A blood sample is sent to a laboratory for testing and analysis.