How do I prepare for a rheumatoid factor blood test?You don’t need to do anything special to get ready for a rheumatoid factor blood test. You can eat, drink and do all your usual activities.Your provider may take a sample of your blood during a routine physical exam or if you visit them after noticing new symptoms. They might ask you to visit a phlebotomist (blood draw specialist) at a separate appointment.What happens during the test?The RF test is just like any other blood draw you may have had before. Your provider or a phlebotomist will take a sample of your blood from a vein on the inside of your elbow or the back of your hand. Tell your provider if you don’t like needles or feel stressed during blood draws. They’ll help you relax and feel comfortable before and during the test.Your provider or phlebotomist will:Clean the area with an antiseptic wipe.Put an elastic band around your upper arm that puts light pressure on it. They may ask you to make a fist or squeeze your hand, too...
