| Femoral Popliteal Bypass Surgery Femoral popliteal (also called femoropopliteal) bypass surgery is a surgical procedure that may be used to treat severe blockage due to plaque in the femoral artery. The femoral and popliteal arteries are located in the legs. |
| Fluoroscopy Procedure Fluoroscopy is a study of moving body structures—similar to an X-ray "movie." |
| Fetal Ultrasound Fetal ultrasound is a test used during pregnancy that creates an image of the fetus in the mother's uterus, or womb. |
| 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. |