Culdocentesis
（重定向自Colpotomy）
Culdocentesis is a medical procedure involving the extraction of fluid from the pouch of Douglas (a rectouterine pouch posterior to the vagina) through a needle. It can be one diagnostic technique used in identifying pelvic inflammatory disease (in which case purulent fluid will be extracted) and ruptured ectopic pregnancies that cause hemoperitoneum.