Mesentaries and Abdominal Foregut Flashcards
Parietal and visceral peritoneum are ____ with one another
Continuous
What are the functions of the parietal and visceral peritoneum?
Produce peritoneal fluid that reduces friction between abdominal organs and to produce antibodies/mobilize leukocytes (resists infection)
What is a mesentary?
Double layer of peritoneum that connects intraperitoneal organs to the abdominal wall
What runs within mesentaries?
Arteries, veins, nerves, lymphatics and variable amounts of fat that supply the organs attached
What is an omentum?
Collection of ligaments (tissue) that connect the organs to each other
List the peritoneal ligaments
Hepatoduodenal Hepatogastric Gastrophrenic Gastrosplenic Gastrocolic Splenorenal Phrenocolic Transverse mesocolic
Where is the lesser sac?
Space behind the lesser omentum
What is the greater omentum?
Tissue (ligaments) that drapes over anterior surface of intestines
Epiploic foramen
Opening connecting the greater and lesser sacs (spaces)
Anterior boundary of epiploic foramen
Hepatoduodenal ligament
Posterior boundary of epiploic foramen
Peritoneum
Superior boundary of epiploic foramen
Liver
Inferior boundary of epiploic foramen
1st part of duodenum
In what quadrant is most of the stomach?
LUQ
At what level is the esophageal hiatus of the diaphragm?
T10
At what level does the esophagus enter the stomach and where?
T11
At the cardiac orifice
What are the parts of the stomach?
Cardia Fundus Body Pylorus Greater and lesser curvature
The greater curvature of the stomach connects to ____
Greater omentum
The lesser curvature of the stomach connects to _____
Lesser omentum
Hiatal hernia
Portion of the stomach that protrudes up through the esophageal hiatus of the diaphragm
2 types of hiatal hernias?
- Para-esophageal
2. Sliding
Para-esophageal hiatal hernia
Fundus herniates through the esophageal hiatus
- NO REGURGITATION
Sliding hiatal hernia
Cardia and some fundus herniate through the esophageal hiatus
- SOME REGURGITATION
Where is the spleen?
LUQ, parallel to ribs 9-11
Where does the duodenum begin and end?
Begins at pylorus and ends at the level of L2 at the duodenojejunal junction
How many parts of the duodenum are there?
4
1st part of duodenum
Superior; begins traveling to the right
2nd part of duodenum
Descends; contains openings of hepatopancreatic ducts
3rd part of duodenum
Horizontal; crossed by superior mesenteric artery and vein
4th part of duodenum
Ascends to join with jejunum
Which parts of the duodenum are retroperitoneal?
2-4
What ligament connects the duodenojejunal junction?
Ligament of Treitz
Sympathetic innervation of foregut
T5-T9 from greater splanchic nerves
Parasympathetic innervation of foregut
From anterior and posterior vagal trunks that pierce diaphragm at T10
Where is the liver?
RUG, epigastric and can extend over to LUQ
Diaphragmatic surface of liver
Conforms to concavity of diaphragm, no visceral peritoneum there and also in contact with inferior vena cava
Visceral surface of liver
Covered with peritoneum, except where gallbladder and porta hepatis are located
What is porta hepatis?
Transverse fissure on the liver that contains the portal triad
Cirrhosis
Hepatomegaly and hobnail appearance of liver due to fatty changes and fibrosis
The right lobe of the liver is bigger. What smaller lobes does it contain?
Caudate and quadrate lobes
What are the ligaments of the liver?
Coronary ligament
Right and left triangular ligaments
Falciform ligament
The falciform ligament of the liver separates what?
Right and left liver lobes
The caudate lobe of the liver is between the falciform ligament and the?
IVC - inferior vena cava
The quadrate lobe of the liver is between the falciform ligament and the?
Gallbladder
Describe the dual blood supply of the liver
- Receives oxygenated blood from the heart via the hepatic artery
- Receives venous blood from the stomach, intestines, spleen and gallbladder via the hepatic portal vein which connects to the IVC
What is in the portal triad?
Hepatic artery
Hepatic portal vein
Common bile duct
What is the pringle maneuver?
Compressing the hepatic artery in order to stop the bleeding from the cystic artery during gallbladder removal surgery
Where is the pancreas?
Behind lesser sac in epigastric region at level of L1-L2
What are the parts of the pancreas?
Uncinate process, head, neck, body, tail
The head of the pancreas sits where?
Adjacent to 2nd and 3rd parts of duodenum
Function of gallbladder?
Stores and releases bile
Parts of gallbladder?
Neck, body, fundus
What connects the gallbladder to the liver?
The cystic duct connects to the common bile duct which is connected to the liver
Describe the formation of the hepatopancreatic ampulla
Right and Left hepatic ducts form common hepatic duct
- Joins with cystic duct to form bile duct
- Bile duct joins with pancreatic duct to create hepatopancreatic ampulla
Cholelithiasis
Gallstones
Gallstones are made of what?
Cholesterol crystals
Where can gallstones lodge?
Cystic duct
Hepatic duct
Hepatopancreatic duct
If gallstones lodge at hepatopancreatic duct, what happens?
Bile backs up into pancreas and can cause pancreatitis
3 main arteries off the celiac trunk?
Common hepatic
Splenic
Left gastric