Final answer:
Culdocentesis is the procedure used to remove fluid from the Rectouterine Pouch. It is done by inserting a needle through the vaginal wall into the pouch to diagnose conditions like ectopic pregnancy or PID.
Step-by-step explanation:
The procedure for removing fluid from the Rectouterine Pouch, also known as the Pouch of Douglas, is called Culdocentesis. This medical procedure involves the insertion of a needle through the vaginal wall, into the space behind the uterus where fluid may accumulate under certain conditions. It is commonly used to diagnose the presence of ectopic pregnancy, endometriosis, or pelvic inflammatory disease (PID). During this procedure, the patient is typically placed in a lithotomy position, and a needle is carefully inserted into the most dependent area of the vaginal fornix, aiming to access the rectouterine pouch where any pathological fluid accumulation can be aspirated.