Abdomen #2 (starting w/ portal vein; lecture 30B) Flashcards
List the tributaries of the splenic vein (4; and secondary tributaries if applicable)
- Mnemonic: LIPS*
1. ) Inferior mesenteric vein (IMV) and its tributaries:
a. ) Left colic
b. ) Sigmoid
c. ) Superior rectal
2. ) Pancreatic veins
3. ) Left gastroepiploic vein
4. ) Short gastric veins - approx. p.250 Moore
Where does the SMV meet the splenic vein? What do they form?
Posterior to the neck of the pancreas to form the portal vein.
-p.252 Moore
List the tributaries of the SMV
- ) Inferior pancreaticoduodenal vein
- ) Right gastroepiploic vein
- ) Right colic vein
- ) Ileocolic vein
- ) Jejunal veins
- ) Ileal veins
What are the three most important/clinically relevant portosystemic anastomoses, where do they occur, and what is their relevant pathology (e.g. esophageal varices)?
Know clinical significance and anastomosing veins!
1.) Lower esophagus
Portal: Oesophageal branches of left gastric veins
Systemic: Azygous veins
–> Esophageal varoces: Torrential bleeding from the mouth
2.) Upper anal canal
Portal: Superior rectal vein
Systemic: Middle/inferior rectal veins
–> If these veins become engorged, you get HEMORRHOIDS
3.) Umbilical
Portal: Veins of ligamentum teres
Systemic: Superior/inferior epigastric veins
–> “Caput medusae” (p.280 Moore): Engorged dilated veins radiating around belly button can be caused by cirrhosis of the liver in alcoholics.
-p.280 Moore
Where do the portosystemic anastomoses occur (6)?
*Mnemonic: BLUURP* Lower esophagus Upper anal canal Umbilical Bare area of liver Patent ductus venosus (rare) Retroperitoneal
When can a portal vein become blocked?
Cirrhosis of the liver (from alcohol)
- ) Where does the common bile duct open to?
2. ) Where is it in relation to the first part of the duodenum on its way to the second?
- ) Medial side of the second part of the duodenum
2. ) Posterior to the first part of the duodenum <– Know this, according to Dr. Rich!
What is the blood supply for the gallbladder?
The CYSTIC ARTERY which is a branch of the RIGHT HEPATIC ARTERY.
What is Calot’s Triangle? Borders?
Lateral: Inferior border of the liver
Medial: Cystic duct
Superior: Cystic artery
Where does the gallbladder receive innervation from? i.e. sensory, parasympathetic, sympathetic.
Sensory from RIGHT PHRENIC NERVE
Sympathetic: Celiac plexus
Parasympathetic: Vagus
What lymph node becomes enlarged when there is inflammation of the gallbladder?
Mascagni’s/Lund’s lymph node
When performing surgery around Calot’s Triangle (e.g. laproscopic cholecystectomy), what structures should be secured first in order to avoid injury?
Cystic duct and common hepatic duct
-19:00 Lecture 30B
The tail of the pancreas lies inside of what structure?
Lienorenal (literally, “Spleen Kidney”) ligament
Where does the spleen lie in relation to the ribs?
Ribs # 9, 10, and 11. Thus, rib injuries can injure the spleen.
What structures form the cystohepatic triangle?
Cystic duct, common hepatic duct, and the liver margin.
-19:16, Lecture 30B
What provides sensory innervation for the gallbladder?
Right phrenic nerve
What are the main risk factors for developing gall stones (4)?
The four F’s
Fat, female, forty, fertile
- ) Describe the location of the pancreas?
2. ) Where does it refer pain to?
- ) Retroperitoneally and transversely across the posterior abdominal wall.
- ) To the back
What structure(s) is/are at risk when surgically removing the spleen?
The lienorenal ligament (attaches the hilum of the spleen to the kidney) and/or tail of the pancreas that lies within it
What lies behind the neck of the pancreas in situ?
Portal vein (where the SMV and splenic vein unite to form the portal vein).
What is a possible consequence of cancer in the head of the spleen?
It compresses the common bile duct and prevents bile from entering the second part of the duodenum and bile subsequently enters the bloodstream. THIS CAUSES JAUNDICE.
Which blood vessels does the head of the pancreas lie over?
IVC, left and right renal veins, and right renal artery.
What is the uncinate process?
A projection from the inferior part of the head of the pancreas that extends TO THE LEFT (it is at the bottom of the head after it forms a “C”).
Where does the neck of the pancreas lie in relation to the pylorus and superior mesenteric vessels?
It overlies the superior mesenteric vessels and is ADJACENT to the pylorus.
Where does the body of the pancreas lie in relation to vertebrae, aorta, and omental bursa?
It crosses the body of L2 and aorta, and lies in the floor of the omental bursa.
What blood vessels is the body of the pancreas in contact with (5)?
Posteriorly, it is in contact with the aorta, SMA, left suprarenal, left kidney, and related vessels.
Where does the main pancreatic duct begin and run towards?
Begins in the tail and runs towards the head.
- ) Where does the common bile duct open into the duodenum?
- ) What is the structure called?
- ) It opens into the major duodenal papilla in the DESCENDING portion (2nd part) of the duodenum.
- ) Hepatopancreatic AMPULLA OF VATER
What is the name of the structure that surrounds the major duodenal papilla?
Sphincter of Oddi (smooth muscle)
- ) Where does the accessory pancreatic duct open into?
2. ) Where does the ampulla of Vater open into?
- ) Minor duodenal papilla
2. ) Major duodenal papilla
- ) What is the largest lymphatic organ and where is it located?
- ) Where does it lie in relation to the ribs?
- ) The spleen, located in the LUQ
2. ) Related posteriorly with ribs 9-11
Which structures are related to the spleen in the following ways:
- ) Posteriorly
- ) Inferiorly
- ) Medially
- ) At splenic hilum
- ) Diaphragm
- ) Splenic flexure of colon
- ) Left kidney (via splenorenal ligament)
- ) Tail of pancreas extends to hilum
- ) What provides parasympathetic innervation to the spleen?
- ) Sympathetic?
- ) Vagus
2. ) Greater splanchnic
When observing a person posteriorly, approximately where does the spleen refer pain?
In the left border of the mid-back
- ) Is the descending colon intra or retroperitoneal?
2. ) Sigmoid colon?
- ) Retro
2. ) Intra (covered on all sides by peritoneum)
What are the 3 key features that distinguish the large intestine from the small intestine?
- ) Tenia coli (longitudinal muscle band)
- ) Haustra (dilated intestine formed by tenia coli)
- ) Appendices epiploicae
- ) The appendix is _____-peritoneal.
- ) The ascending colon is _____-peritoneal
- ) The transverse colon is _____-peritoneal
- ) The descending colon is _____-peritoneal
- ) Intraperitoneal
- ) Retroperitoneal
- ) Intraperitoneal
- ) Retroperitoneal
What is the cecum?
A dilated portion of the ascending colon
What is the appendix attached to?
The cecum
What attaches the transverse colon to the posterior abdominal wall?
Transverse mesocolon.
The sigmoid colon is covered on all sides by ______ called ______.
Peritoneum called SIGMOID MESOCOLON.
What does the ileocecal valve NOT prevent?
Reflux
- ) Where does the appendix typically arise from?
- ) Where does it get blood supply from and what is it a branch of <– EXAM QUESTION!
- ) What provides parasympathetic innervation to the appendix
- ) The posteromedial side of the cecum
- ) Appendicular artery – Branch of the ILEOCOLIC ARTERY
- ) Vagus
Where is the ascending colon in relation to the abdominal wall?
On the right side of the posterior abdominal wall