The procedure of posterior colpotomy (posterior vaginal fornix puncture)
Generally, posterior fornix puncture is a gynecological examination procedure commonly used in clinical practice to diagnose and treat conditions such as pelvic masses and pelvic effusion. The specific steps are as follows:
1. Position the patient in the lithotomy position and disinfect the external genitalia and vaginal areas with medical alcohol or iodophor.
2. Use a vaginal speculum to expose the cervix and vaginal fornices.
3. Grasp the posterior lip of the cervix with a cervical clamp and pull it forward to fully expose the posterior fornix of the vagina. Disinfect the puncture site again with iodophor or medical alcohol.
4. Attach a 12-gauge needle to a 10 ml syringe and insert it into the midpoint of the posterior fornix, about 1 cm below the junction of the cervical and vaginal mucosa, advancing parallel to the cervical canal.
5. Once the needle passes through the vaginal wall and a sensation of "loss of resistance" is felt, angle the needle tip toward the affected side and slowly withdraw it while simultaneously aspirating.
6. After aspiration is complete, remove the needle, allow for hemostasis, and then withdraw the vaginal speculum.
Remain relaxed during the procedure. To avoid causing bodily harm, this procedure should be performed under the guidance of a qualified physician.