Portal Veins

the main portal vein enters the liver at the —

porta hepatis, also referred to as the liver hilum

the main portal vein is created by

the union of the superior mesenteric vein and splenic vein

the portal confluence

or portal splenic confluence. is the area of the merger of the SMV & the splenic vein & the IMV (inferior mesenteric vein)

the portal confluence typically takes place

posterior to the neck of the pancreas and anterior to the IVC

the portal vein provides the liver with approx. — of its total blood

75%

the blood within the portal vein is partially —

oxygenated

where is the blood from the portal vein derived from

the intestines

the remainder of hepatic perfusion is via the:

hepatic artery

as the MPV enters the liver, it splits into the

right and left portal vein

the right portal vein, like the right hepatic lobe

Is separated into anterior and posterior division

the left portal vein, like the left hepatic lobe

Is separated into medial and lateral division

the diameter of the main portal vein can vary with respiration, although it typically measures less than — in the anteroposterior dimension

13mm

enlargement of the PV is often indictive of

portal hypertension

normal PV — in size as they approach the diaphragm

decreases

normal flow within the portal veins should be —, with some variation noted with respiratory changes

hepatapedal and monophasic