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In human anatomy, the omental foramen (epiploic foramen, foramen of Winslow after the anatomist Jacob B. Winslow, or uncommonly aditus; Latin: Foramen epiploicum) is the passage of communication, or foramen, between the greater sac, and the lesser sac of the peritoneal cavity.
It is connected with the lesser sac via the omental foramen, also known as the foramen of Winslow or epiploic foramen, which is anteriorly bounded by the portal triad – portal vein, hepatic artery, and common bile duct.
The lesser sac, also known as the omental bursa, is a part of the peritoneal cavity that is formed by the lesser and greater omentum.Usually found in mammals, it is connected with the greater sac via the omental foramen or Foramen of Winslow.
Foramen of Winslow access: Opening the foramen of Winslow is achievable through the Kocher manoeuvre. This allows surgeons to access the lesser sac, facilitating procedures in this region. Superior mesenteric artery exposure: The SMA is a critical vascular structure, and the Kocher manoeuvre exposes its supramesenteric segment.
The vesicouterine pouch is a fold of peritoneum over the uterus and the bladder, forming a pelvic recess. [1] It is continued over the intestinal surface and body of the uterus onto its vesical surface, which it covers as far as the junction of the body and cervix uteri, and then to the bladder.
The common anatomical term "epiploic" derives from "epiploon", from the Greek epipleein, meaning to float or sail on, since the greater omentum appears to float on the surface of the intestines. It is the first structure observed when the abdominal cavity is opened anteriorly (from the front).
The epiploic foramen allows communication between the greater sac and the lesser sac. [2] The peritoneal space in males is closed, while the peritoneal space in females is continuous with the extraperitoneal pelvis through openings of the fallopian tubes, the uterus, and the vagina. [3]
Omental foramen (Epiploic foramen, Foramen of Winslow) Greater omentum – Fat sheath under abdominal wall Peritoneum – Serous membrane that forms lining of abdominal cavity or coelom