Peritoneum Flashcards
Define peritoneum
Serous membrane lines the wall of the abdominal cavity
Where does peritoneum lie
Lies on abdominal and pelvic organs
Define parietal peritoneum
Adheres to anterior and posterior abdominal walls
Define visceral peritoneum
Inner layer lines abdominal wall
What are the layers of the peritoneum
Parietal
Peritoneal cavity
Visceral
Where is the lesser sac located
Posterior to stomach and liver
Anterior to pancreas and duodenum
Provides space for unhindered movement of the stomach
Where is the greater sac located
Extends from diaphragm to pelvic cavity
Contains liver, stomach and spleen, small intestine, ascending colon, descending colon
Define mesentery
Folds in the peritoneum
Define omenta
Two layers in the peritoneum which has fused.
Extend from the stomach and proximal duodenum to neighbouring organs
Where is the greater omentum
Covers anterior surface of small intestine
Where is the lesser greater omentum
Hangs proximal duodenum to greater curvature of the stomach
Folds attach surface of transverse colon and mesentery on inferior edge
What is the mnemonic for retroperitoneal organs
SAD PUCKER
What does the mnemonic for retroperitoneal organs stand for
Suprarenal (adrenal) glands
Aorta and inferior vena cava
Duodenal (distal section - everything apart from first portion)
Pancreas (except tail)
Ureters
Colon (ascending and descending)
Kidneys
E (o)esphagus
Rectum
Is the liver intraperitoneal or retroperitoneal
Intraperitoneal
Is the spleen intraperitoneal or retroperitoneal
Intraperitoneal
Is the stomach intraperitoneal or retroperitoneal
Intraperitoneal
Is the superior part of the duodenum intraperitoneal or retroperitoneal
Intraperitoneal
Is the jejunum intraperitoneal or retroperitoneal
Intraperitoneal
Is the ileum intraperitoneal or retroperitoneal
Intraperitoneal
Is the transverse colon intraperitoneal or retroperitoneal
Intraperitoneal
Is the sigmoid colon intraperitoneal or retroperitoneal
Intraperitoneal
Is the kidney intraperitoneal or retroperitoneal
Retroperitoneal
Is the adrenal intraperitoneal or retroperitoneal
Retroperitoneal
Is the aorta and inferior vena cava intraperitoneal or retroperitoneal
Retroperitoneal
Is the distal duodenum intraperitoneal or retroperitoneal
Retroperitoneal
Is the pancreas (not including the tail) intraperitoneal or retroperitoneal
Retroperitoneal
Is the ureters intraperitoneal or retroperitoneal
Retroperitoneal
Is the colon (ascending and descending) intraperitoneal or retroperitoneal
Retroperitoneal
Is the kidney intraperitoneal or retroperitoneal
Retroperitoneal
Is the oesophagus intraperitoneal or retroperitoneal
Retroperitoneal
Is the rectum intraperitoneal or retroperitoneal
Retroperitoneal
What is the role of the peritoneum
Acts to support viscera
Provides pathway for blood vessels and lymph to travel to and from the viscera
What is pain of the parietal peritoneum
Well localised
Sensitive to pain, pressure, laceration and temperature
Why is pain of the peritoneum well localised
Receives same somatic nerve supply as the region of the abdominal wall that it lines
What is the pain of the visceral peritoneum
Poorly localised
Only sensitive to stretch and chemical irritation
Describe the peritoneal cavity
Potential space between the parietal and visceral peritoneum
Normally contains a small amount of lubricating fluid
What type of peritoneum covers retroperitoneal organs
Parietal that covers the anterior surface
What type of peritoneum covers intraperitoneal organs
Enveloped by visceral peritoneum
Define secondary retroperitoneal
Initially intraperitoneal
Describe a mesentery
Double layer of visceral peritoneum
Connects intraperitoneal organs (usually) to the posterior abdominal wall
Provides pathway for nerves, blood vessels and lymphatics to travel from the body wall to the viscera
Describe omenta
Sheet of visceral peritoneum that extends from the stomach and proximal part of the duodenum to other abdominal organs
How many layers of visceral peritoneum does the greater omentum contain
4
How many layers of visceral peritoneum does the lesser curvature contain
2
What does the lesser curvature attach
Lesser curvature of the stomach and the proximal part of the duodenum to the liver
What are the parts of the lesser curvature
Hypogastric ligament
Hepatoduodenal ligament
What can the peritoneal cavity be divided into
Greater sac
Lesser sac
Where does the lesser sac lie
Posterior to the stomach and lesser omentum
How is the greater sac divided
into 2 by the mesentery of the transverse colon
Supracolic compartment
Infracolic compartment
What lies in the supracolic compartment
Lies above the transverse mesocolon
Contains stomach, liver and spleen
What lies in the infracolic compartment
Lies below the transverse mesocolon
Contains small intestine, ascending and descending colon
How are the supracolic and infracolic compartments connected
By the paracolic gutters which lies between the posterolateral abdominal wall and the lateral aspect of the ascending or descending colon
What is the role of the lesser sac
Allows the stomach to move freely against the structures posterior and inferior to it