Portacaval anastamoses Flashcards
What does the portal venous system drain?
all GI organs between distal esophagus and rectum
How does the hepatic portal system start?
as capillaries in the digestive system
How does the hepatic portal system end?
as capillaries in theliver
What is the most important characteristic of the hepatic portal V.?
it’s valveless
What is the liver itself drained by?
hepatic veins, NOT THE PORTAL VEIN
What ligament does the hepatic portal vein run through?
the hepatoduodenal ligament
What is the porta hepatis?
a deep fissure on the inferior surface of the liver through which all neurovascular structures and hepatic ducts enter and leave the liver
Where is the IVC in relation to the aorta?
to the right and parallel
With an esophageal varicie (varix?) what is the portal and caval drainages we are worried about?
Portal: left gastric v. to portal V.
Caval: esoophageal V. to azygous to IVC
What are the clinical signs of esophageal varices?
bleeding
black tarry stools
With caput medusae, what is the portal and caval drainages?
Portal: paraumbilical veins (in falciform ligament)
Caval: superficial epigastric veins
-inferior epigastric empties into external iliac -superficial epigastric empties into femoral
With colic veins, what are the portal and caval drainages?
portal: SMV and IMV
caval: retroperitoneal veins that drain the posterior body wall
What veins drain into the lumbar veins which then go to the IVC?
Veins of Retzius
-this is the caval drainage for the colic veins
With rectal varices, what is the portal and caval drainage?
Portal: superior rectal veins Caval: middle and inferior rectal veins *middle goes to internal iliac *inferior goes to internal pudendal -they both eventually get to common iliac veins
What is the clinical sign for rectal varices?
Hemorrhoids
- veins prolapse through the rectum
- Painless
