Liquid-based ultrathin cytometry refers to a type of cervical smear in which a special small brush is placed about 1cm into the cervical canal. After rotating 360 degrees in the cervical canal and then removing it, the small brush is immediately placed in a preservation solution, then stained with Pap smear and placed under a microscope for image analysis to screen for the presence of cervical heterogeneous cells, and reproductive tract infections, such as bacterial vaginosis, trichomonas vaginalis, mycoplasmal vaginosis, chlamydial cervicitis, and HPV viral infections. Liquid-based ultrathin cell test compared to the traditional cervical scraping, smear effect is clear, the examination is more easily and accurately, in the 24 hours before the collection of specimens, should be prohibited from sexual intercourse as well as vaginal plugs, you need to avoid the menstrual period. If excessive leukorrhea is detected before the specimen is taken, the mucus on the surface of the cervix should be gently wiped off with a sterile dry cotton ball before scraping the specimen.