Medical assistants are responsible for performing a variety of the tasks that enable a health-care facility to properly treat its patients. These tasks include, but are not limited to: preparing treatment rooms for patients' examinations; scheduling appointments and maintaining medical records; interviewing patients, measuring vital signs, weight and height, and then recording the information; administering injections, performing venipuncture, electrocardiograph (EKG), and other equipment to administer routine diagnostic tests; and completing insurance forms. The exact duties that a medical assistant performs are unique to the setting in which she or he is employed.