The rectouterine pouch TA : excavatio rectouterina 3 , also known as the rectovaginal pouch , cul-de-sac or pouch of Douglas , is an extension of peritoneum between the posterior wall of uterus and the rectum in females. It is the most dependent part of the peritoneal cavity and is analogous to the rectovesical pouch in males. Being the most dependent and lower area of the peritoneal cavity of females in the supine position, fluids e. A small amount of homogeneous and low-attenuated fluid in the rectouterine pouch is normally seen in child-bearing age women. The pouch is useful in end-stage renal failure patients, where it is a preferred place for peritoneal dialysis.
The pelvic cavity is a bowl-like structure that sits below the abdominal cavity. The true pelvis, or lesser pelvis, lies below the pelvic brim Figure 1. This landmark begins at the level of the sacral promontory posteriorly and the pubic symphysis anteriorly. The space below contains the bladder, rectum, and part of the descending colon. In females, the pelvis also houses the uterus, fallopian tubes, and ovaries. The uterus sits in the center of the female pelvic cavity Figure 2.
The upper two-thirds of the uterus is the body or corpus, which has its own diagnostic, staging and treatment guidelines. The lower third of the uterus comprises the cervix. The upper boundary of the cervix is the level of the internal os, a narrowing of the uterus that is also referred to as the isthmus. The internal os is the opening between the cervix and the corpus.
The recto-uterine pouch , also known by various other names e. In women, the recto-uterine pouch is the deepest point of the peritoneal cavity. It lies posterior to the uterus and anterior to the rectum.