Hepatic Portal System Flashcards Preview

GI Midterm > Hepatic Portal System > Flashcards

Flashcards in Hepatic Portal System Deck (16):

Portal vein

2 inches long
formed by - splenic v, SMV, IMV


Hepatic Portal System

forms posterior to the neck of the pancreas
ends as right and left branches in the liver
runs through the hepatoduodenal ligament to enter the liver at the aorta hepatis


porta hepatis

deep fissure on the inferior surface of the liver through which all neurovascular structures (except hepatic) hepatic ducts enter and leave the liver



drain the same parts of the small and large intestine supplied by branches of the SMA



drain the the same parts of the large intestine that were supplied by branches of the inferior mesenteric a


Veins of the Stomach and Esophagus

blood can drain superiorly into the azygous system
blood can drain inferiorly into the portal system
there is a submucous venous plexus in the esophagus


IVC Location

common iliac veins joint to form IVC at L5
formation is posterior to and inferior to the aortic bifurcation
lies to the right and parallel to the aorta
lies to te right of the lumbar and thoracic vertebrae
passes through liver
pierces the central tendon of the diaphragm at T8
has connections with azygos system of veins


IVC Drains

posterior body wall muscles, genitourinary system, lower limbs


Esophageal Varicies

esophageal brances of left gastric vein connect with vens on lower thoracic esophagus
Portal drainage - L gastric v, Portal v
Caval drainage - Esophageal v, azygos v, SVC
clinical sign - esophageal varicies


Caput Medusae

portal drainage - paraumbillical v (in falciform ligament)
caval drainage - superficial epigastric v
clinical sign - caput medusae


Colic veins to retroperitoneal veins

portal drainage - vv draining the ascending colon (SMV) and descending colon (IMV)


Rectal Varicies

portal drainage - superior rectal v
calval drainage - middle and inferior rectal veins
clinical sign - hemorhoids


Pectinate line

upper 2/3 of anal canal is above pectinate line and gets visceral inn (not painful)
lower 1/3 of anal canal is below pectinate line and receives somatic inn (painful)


Visceral pain

internal organ damaged
caused by activation of pain receptors in chest, abdomen, or pelvis
pain is vague and not well localized


somatic pain

body surface or mm tissues
pain is dull or aching


TIPS procedure

transjugular intrahepatic portosystemic shunting
procedure - jugular vein - SVC and IVC - Hepatic V tributary = liver paraenchyma - portal v
stent placement