Coagulation Factors

Coagulation factors are proteins that are essential for blood clot formation. Produced by the liver, the coagulation factors are released into the bloodstream when an injury occurs and are activated in a step by step process (coagulation cascade).

These are tests which are done when you have problems with clotting. They are also done to monitor effectiveness of anticoagulation therapy. Problems may be present at birth, the result of a disease, or effects of medications.

PREPARATION FOR TEST

A blood sample is obtained by inserting a needle into a vein in the arm.

NORMAL FINDINGS

Factor / Normal Value (% of "Normal")

  • II / 80-120

  • V / 50-150

  • VII / 65-140

  • VIII / 55-145

  • IX / 60-140

  • X / 45-155

  • XI / 65-135

  • XII / 50-150

Ranges for normal findings may vary among different laboratories and hospitals. You should always check with your doctor after having lab work or other tests done to discuss the meaning of your test results and whether your values are considered within normal limits.

MEANING OF TEST

Your caregiver will go over the test results with you and discuss the importance and meaning of your results, as well as treatment options and the need for additional tests if necessary.

OBTAINING THE TEST RESULTS

It is your responsibility to obtain your test results. Ask the lab or department performing the test when and how you will get your results.