Culdocentesis is a medical procedure involving the extraction of fluid from the rectouterine pouch (pouch of Douglas) 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.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).