The Posterior Peritoneal Attachments

Figure 3-1 shows the roots of the mesenteric attachments of the intraperitoneal segments ofbowel, and Figure 3-2 illustrates the reflections of the peritoneum from the posterior abdominal wall deep to the bowel, liver, and spleen. The transverse mesocolon constitutes the major barrier dividing the abdominal cavity into suprameso-colic and inframesocolic compartments. The obliquely oriented root of the small bowel mesentery further divides the inframesocolic compartment into two spaces of unequal size: (a) the smaller right infracolic space bounded inferiorly by the junction of the mesentery with the attachment of the ascending colon, and (b) the larger left infracolic space, which is open anatomically toward the pelvis.

The pelvis constitutes about one-third of the volume of the peritoneal cavity and is its most dependent part in either the supine or erect position. It is anatomically continuous with both paracolic gutters the peritoneal

Phrenicocolic Ligament

Fig. 3—1. The peritoneal investment of the extraperitoneal segments of the alimentary tract.

The mesenteric portions of the gut have been removed, including the stomach, small bowel, transverse colon, and sigmoid colon.

Fig. 3—1. The peritoneal investment of the extraperitoneal segments of the alimentary tract.

The mesenteric portions of the gut have been removed, including the stomach, small bowel, transverse colon, and sigmoid colon.

Peritoneal Attachments

Fig. 3—2. Posterior peritoneal reflections and recesses.

SP = spleen; LS = lesser sac; IVC = inferior vena cava; EF = epiploic foramen of Win-slow; RK = right kidney; D = duodenum; A = adrenal gland; SC = splenic flexure of colon; R = rectum; B = urinary bladder. The removed stomach is indicated.

(Modified from Meyers.6)

recesses lateral to the ascending and descending colon. The right paracolic gutter is wide and deep and is continuous superiorly with the right subhepatic space and its posterosuperior extension deep to the liver, which is surgically known as Morison'spouch7 (Fig. 3-3). The right subhepatic space is anatomically continuous with the right subphrenic space around the lateral edge of the right coronary ligament of the liver. In contrast, the left paracolic gutter is narrow and shallow and is interrupted from continuity with the left subphrenic space (perisplenic or left perihepatic space) by the phrenicocolic ligament, which extends from the splenic flexure of the colon to the left diaphragm.

Baby Sleeping

Baby Sleeping

Everything You Need To Know About Baby Sleeping. Your baby is going to be sleeping a lot. During the first few months, your baby will sleep for most of theday. You may not get any real interaction, or reactions other than sleep and crying.

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Responses

  • Susanna
    Is the sigmoid colon above the peritoneal reflection?
    6 years ago

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