Tests & Procedures

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Factor I
This test measures the amount of a protein called factor I, or fibrinogen, in your blood. It helps find out if you have a bleeding or clotting disorder.
Factor II
This test measures how much of the protein prothrombin, or factor II, is in your blood. It can help diagnose bleeding and clotting disorders.
Factor IX (Antihemophilic Factor B)
The factor IX test is part of a larger screening to find out which type of hemophilia you have.
Factor V
This test looks for a deficiency in a protein called factor V. This protein is one of your body's "clotting factors." When you have too little factor V, you may have bleeding problems.
Factor VIII (Antihemophilic Factor A)
This test helps find out whether you have hemophilia A or another clotting disorder.
Factor X
This test checks for a deficiency in a protein in the blood known as Factor X. This protein helps with clotting.
Factor XI
This test measures the amount of factor XI in your blood. Factor XI is a substance that plays an important role in blood clotting.
Factor XII
This test measures the amount of a protein called coagulation factor XII in your blood. Factor XII is one of several clotting factors.
Fecal Fat
This test measures the amount of fat in your stool. Having too much fat in your stool may mean that you have malabsorption.
Fecal Occult Blood Test
A fecal occult blood test checks a stool sample for blood that can't be seen with the naked eye. Blood in the stool is a sign of bleeding in the digestive tract.