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Flashcards in Portacaval anastamoses Deck (18):
1

What does the portal venous system drain?

all GI organs between distal esophagus and rectum

2

How does the hepatic portal system start?

as capillaries in the digestive system

3

How does the hepatic portal system end?

as capillaries in theliver

4

What is the most important characteristic of the hepatic portal V.?

it's valveless

5

What is the liver itself drained by?

hepatic veins, NOT THE PORTAL VEIN

6

What ligament does the hepatic portal vein run through?

the hepatoduodenal ligament

7

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

8

Where is the IVC in relation to the aorta?

to the right and parallel

9

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

10

What are the clinical signs of esophageal varices?

bleeding
black tarry stools

11

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

12

With colic veins, what are the portal and caval drainages?

portal: SMV and IMV
caval: retroperitoneal veins that drain the posterior body wall

13

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

14

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

15

What is the clinical sign for rectal varices?

Hemorrhoids
-veins prolapse through the rectum
-Painless

16

What is the significance of the pectinate line?

above it, not painful
below it, very painful

17

What is visceral pain caused by?

activation of pain receptors in the chest, abdomen, or pelvis
-pain is vague and not well localized

18

What is the TIPS procedure?

All they do is shunt blood from the portal vein into the IVC.\
-this will relieve the pressure buildup in the portal system if the liver isn't working properly