Lesser sac (307-316)

Question 1

What is meant by lesser sac?;

Answer 1

(Also known an omental bursa).
It is the potential space between the stomach and the pancreas formed by the lesser and great omentum. It allows the stomach to move freely against the structures posterior and inferior to it.

Question 2

Name the boundaries of the lesser sac?;

Answer 2

Anteriorly- visceral peritoneium along posterior wall of stomach, lesser omentum, gastrocolic ligament.
Posteriorly- peritoneum that covers pancreas, left kidney & adrenal gland.
Lateral left- spleen.
Lateral right- epiploic foraemen.
Superior- caudate lobe of liver.

Question 3

What are the boundaries of the epiploic foramen?;

Answer 3

Anterior- the hepatoduodenal ligament (free edge of lesser omentum).
Superior- caudate lobe of liver.
Inferior- Duodenum D1.
Posterior- Inferior Vena Cava.

Question 4

What stuctures are found within the free edge of the lesser omentum?;

Answer 4

Hepatic artery proper, portal vein and common bile duct (free edge of lesser omentum is the hepatoduodenal ligament)

Question 5

What is Pringle’s manoeurve?;

Answer 5

Clamp hepat-duodenal ligament (free edge of lesser omentum)

Question 6

Name the parts of the gallbladder;

Answer 6

Fundus, body, infundilum (Hartmanns pouch), Neck, Cystic duct

Question 7

What is the blood blood supply to the gall bladder and the bile duct?;

Answer 7

Cystic artery (branch of right hepatic artery)

Question 8

What are the boundaries and contents of the Calot’s triangle?;

Answer 8

Superior- inferior surface of liver.
Inferior/laterally- cystic duct.
Medial- common hepatic duct.
Cystic artery runs through it

Question 9

What is the blood supply to the duodenum?;

Answer 9

Superior pancreaticoduodenal artery (branch of Gastroduodenal artery which comes from common hepatic artery). Inferior pancreaticoduodenal artery (branch of superior mesenteric artery)

Question 10

Describe the blood supply to the pancreas;

Answer 10

Spenic artery -> great pancreatic artery.
The head is additionally supplied by superior pancreaticoduodenal artery (branch of gastroduodenal [branch of common hepatic]) and inferior pancreaticoduodenal artery (branch of SMA).