Culdocentesis is a diagnostic method that aims to remove fluid from the region located behind the cervix in order to help diagnose gynecological problems, such as ectopic pregnancy, which corresponds to pregnancy outside the uterine cavity. See what are the symptoms of ectopic pregnancy.
The exam is painful, as it is invasive, but it is simple and can be performed both in a gynecological office and in emergencies.
What is it for
Culdocentesis can be requested by the gynecologist to investigate the cause of pain in the lower abdomen with no specific cause, to assist in the diagnosis of pelvic inflammatory disease and to identify the cause of bleeding when there is a suspected ovarian cyst or ectopic pregnancy, mainly.
Despite being a method used to diagnose ectopic pregnancy, this diagnostic method is only performed if it is not possible to perform hormonal dosage or endocervical ultrasound to make the diagnosis, since it is an invasive technique with low sensitivity and specificity.
How culdocentesis is done
Culdocentesis is a diagnostic method carried out by inserting a needle into the retouterine region, also known as the Douglas cul-de-sac or Douglas pouch, which corresponds to a region behind the cervix. Through the needle, the puncture of liquid located in this region is performed.
The test is said to be positive for ectopic pregnancy when the punctured fluid is bloody and does not clot.
This exam is simple and does not require preparation, however it is invasive and is not performed under anesthesia, so the woman may experience acute pain at the time the needle is inserted or have a feeling of abdominal cramping.
