Detailed steps of posterior fornix puncture procedure
Sep 29, 2022
Source: Cainiu Health
Dr. Zhao Xiaodong
Introduction
Posterior colpotomy is a commonly used gynecological examination technique in which a physician performs a puncture through the posterior fornix of the vagina to aspirate fluid for diagnostic evaluation. It is frequently employed in diagnosing conditions such as ectopic pregnancy and ruptured ovarian masses. The specific procedure involves positioning the patient in the lithotomy position, disinfecting the external genitalia, exposing the posterior fornix, inserting the needle according to standard guidelines, aspirating fluid, withdrawing the needle, and observing for absence of bleeding before final disinfection.
Posterior colpotomy (or posterior fornix puncture) is a commonly used gynecological examination technique in which a physician punctures the posterior fornix of a female patient to extract fluid for diagnostic analysis. It is frequently employed in diagnosing conditions such as ectopic pregnancy and ruptured ovarian cysts. The specific procedure is as follows:
1. The patient should empty her bladder, lie in the supine position with legs placed in stirrups, and move her buttocks to the edge of the bed to maximally expose the perineum. Routine disinfection of the external genitalia and vagina is then performed.
2. A speculum is used to dilate the vagina and fully expose the cervix.
3. The posterior lip of the cervix is grasped with a cervical clamp and pulled forward and upward to expose the posterior fornix. The posterior fornix is re-disinfected using a 2.5% iodine swab and then dried with a clean cotton swab.
4. A 10 mL empty syringe attached to a long 17-gauge or 18-gauge needle is prepared, ensuring the needle is unobstructed. The needle is inserted parallel to the vaginal wall at the center of the posterior fornix or slightly toward the affected side, approximately 1 cm below the junction of the vagina and cervix. Once the needle passes through the vaginal wall and a sensation of "loss of resistance" is felt, immediate aspiration is performed using the syringe. If necessary, the direction or depth of the needle may be adjusted. If no fluid is obtained, aspiration should continue gradually while slowly withdrawing the needle.
5. After needle removal, observe the puncture site for bleeding. Once bleeding is ruled out, disinfect the puncture site to complete the procedure.
It is recommended to undergo this procedure at a正规 medical institution under the guidance of a qualified physician.
