Certain diseases in the uterine cavity can be treated directly through hysteroscopy. Hysteroscopic electrosurgery is a minimally invasive procedure in which abnormal tissues or lesions in the uterine cavity are purposefully removed through hysteroscopic examination and visualization. If there is a tumor growing in the endometrium, the tumor can be removed completely by circumferential electrosurgery. Common tumors include: endometrial polyps, longitudinal malformations of the uterus, submucosal fibroids, uterine adhesions, etc. Compared with traditional open surgery, hysteroscopic electrosurgery has the advantages of no open abdomen and little damage, for example, for submucosal fibroids, traditional surgery requires opening the abdomen, cutting open the uterus, finding the fibroids and removing them, while hysteroscopic electrosurgery for submucosal fibroids only requires finding the fibroids under the hysteroscope and removing them, thus, significantly shortening the postoperative recovery time. This significantly shortens the postoperative recovery time. At the same time, there are certain hazards associated with hysteroscopic electrosurgery, such as excessive straining of the cervix, which can lead to cervical laceration; perforation of the uterus, which can lead to serious intestinal damage if the perforation is not detected and the operation continues; bleeding and infection. Although there are many advantages of hysteroscopic electrosurgery, not all people can be treated by hysteroscopic electrosurgery. For example, if the uterus is too flexed and the hysteroscope cannot enter the bottom of the uterus; if the cervix is scarred and cannot be adequately dilated; or if there is an acute phase of genital infection and the hysteroscopic operation will cause retrograde infection; or in the acute phase of heart, liver and kidney failure and cannot tolerate the operation.