The complexity of tests performed, the level of judgment needed, and the amount of responsibility workers assume depend largely on the amount of education and experience they have. Medical technologists generally have a bachelor's degree in medical technology or in one of the life sciences, or have a combination of formal training and work experience. They perform complex chemical, biological, hematological, immunologic, microscopic, and bacteriological tests. They also type and cross-match blood samples for transfusions. They may evaluate test results, develop and modify procedures, and establish and monitor programs to insure the accuracy of tests.
Some medical technologists supervise medical laboratory technicians.
Technologists in small laboratories perform many types of tests, while those in large laboratories generally specialize. Technologists who prepare specimens and analyze the chemical and hormonal contents of body fluids are clinical chemistry technologists . Those who examine and identify bacteria and other micro-organisms are microbiology technologists . Cytotechnologists, prepare slides of body cells and microscopically examine these cells for abnormalities which may signal the beginning of a cancerous growth. Medical laboratory technicians perform less complex tests and laboratory procedures than technologists.