GI Organs Flashcards
Esophagus path/landmarks
Passes through esophageal hiatus at T10
Enters stomach at the cardiac orifice at T11
Cardiac notch separates esophagus from fundus of stomach
Inferior esophageal sphincter- physiological, not anatomical
Esophageal constrictions
Superior- level of cricoid cartilage/juncture with pharynx
Middle- crossed by aorta and left main bronchi
Inferior- diaphragmatic sphincter
Para-esophageal hiatal hernia
Cardia of stomach in normal position
Peritoneum and fundus of stomach protrude superiorly and small pouch becomes anterior to esophagus
Sliding hiatal hernia
Esophagus, cardia of stomach and fundus of stomach protrude through esophageal hiatus - small portion of these structures become superior to diaphragm
Greater curvature of stomach
Inferior border- greater omentum attaches here
Lesser curvature of stomach
Superior border- lesser omentum attaches here
Stomach anterior relations
Abdominal wall
Left costal margin
Diaphragm
Left lobe of liver
Stomach superior relations
Left dome of diaphragm
Stomach posterior relations
Lesser sac Pancreas Transverse mesocolon Transverse colon Left kidney/suprarenal gland Spleen/splenic artery
Truncal vagotomy
Denervates nerve supply to all of stomach plus most of GI tract and liver
Proximal gastric vagotomy
Denervates branches of vagus nerve going only to the stomach
Selective proximal vagotomy
Denervates specific area of stomach in which parietal cells are located (fundus and cardia)
Duodenum parts 1-4
Begins at pylorus and ends at duodenojejunal junction (L2)
1st part- intraperitoneal, 1” long, travels superior and to the right, associated with hepatoduodenal ligament
2nd part- retroperitoneal, 3-4”
3rd part- retroperitoneal, 4”
4th part- retroperitoneal, 1”, joins with jejunum
Anterior relations to 2nd part of duodenum
Gallbladder (fundus)
Right lobe of liver
Transverse colon
Coiled small intestine
Posterior relations to 2nd part of duodenum
Hilum of right kidney
Right ureter
Lateral relations to 2nd part of duodenum
Right colic flexure
Ascending colon
Right lobe of liver
Medial relations to 2nd part of duodenum
Head of pancreas
Bile and pancreatic ducts
Anterior relations to 3rd part of duodenum
Root of mesentery of small intestine
Superior mesenteric vessels within mesentery
Coils of jejunum
Posterior relations to 3rd part of duodenum
Right ureter
Right psoas major
Inferior vena cava
Aorta
Superior relations to 3rd part of duodenum
Head of the pancreas
Inferior relations to 3rd part of duodenum
Coils of jejunum