A medical technologist is an old name for various medical fields and is different from clinical laboratory medicine site (medical laboratory scientist, clinical laboratory scientist, medical laboratory technologist variation in names ) is an allied health professional that analyzes and tests body fluids and tissues. This includes blood, urine, CSF, synovial fluid, all types of tissue samples, and almost any type of sample removed from a patient for testing. They are responsible for operating and maintaining complex analyzers that are used in a laboratory and ensuring the laboratory results of each patient are accurate and timely.