The clinical lab scientist performs analytical tests on body fluids, cells and products, the results of which are used by physicians to diagnose disease, to select and monitor treatment and to counsel for prevention of disease. These tests require knowledge and skills in clinical chemistry, hematology, immunology, immunhematology and microbiology. In the work arena the role of the clinical lab scientist has expanded beyond the scientific aspects to include management and teaching.
Clinical laboratory technologists perform complex chemical, biological, hematological, immunologic, microscopic, and bacteriological tests. Technologists microscopically examine blood and other body fluids. They make cultures of body fluid and tissue samples, to determine the presence of bacteria, fungi, parasites, or other microorganisms. Technologists analyze samples for chemical content or a chemical reaction and determine concentrations of compounds such as blood glucose and cholesterol levels. They also type and cross match blood samples for transfusions. Clinical laboratory technologists evaluate test results, develop and modify procedures, and establish and monitor programs, to ensure the accuracy of tests. Some technologists supervise clinical laboratory technicians.