Portal vein is usually formed by the confluence of Correct Answer: SMV & Splenic veins
*It also receives blood from the inferior mesenteric, gastric, and cystic veins
Type 1 (a/b) endoleak Correct Answer: Leak in anastamosis of graft at (a) prox or (b) distal end
Type 2 endoleak Correct Answer: Aorta branch vessel; exhibits retrograde flow; more
dangerous b/c internally bleeding
Type 3/4 endoleak Correct Answer: (3) Junction of modular components; (4) Trans graft flow-
graft defect
Chronic Mesenteric Ischemia Correct Answer: "Fear of Food" 95% of Bowel Ischemia cases
Atherosclerotic stenosis/occlusion in main mesenteric arteries: >70% stenosis in 2/3 of principle
mesenteric arteries
Ischemia diagnosis criteria via Moneta Correct Answer: Celiac >200cm/s
SMA >275cm/s
Median Arcuate Ligament Syndrome (MALS) Correct Answer: Arch impedes on Celiac during
EXPIRATION (non-compressed during inhalation)
,Measurement(s) of Splenic Vein Correct Answer: 7-17 cm long; 5-10mm diameter
Portal vein diameter Correct Answer: <13mm
Blood supply to liver Correct Answer: 75% from Portal VEIN; 25% from Hepatic ARTERY
Portal vein carries ____________ to the liver Correct Answer: Nutrients
Hepatic artery carries ______________ to the liver Correct Answer: Oxygen
Large vessels serve as Correct Answer: Pressure reservoirs
Vasodilation Correct Answer: Stretch to absorb
Vasoconstriction Correct Answer: shrink/squeeze
Energy and stenosis Correct Answer: Prox- PE↑, KE↓(highest total energy)
Within-PE↓, KE↑ (lower TE, Bernouille's)
Distal-PE↑, KE↓ (lowest total energy)
Circle of Willis has atleast ____ variations with the most common being ___________________
Correct Answer: 9; the absence of one or both communicating arteries
What portion of the population has an incomplete CofW? Correct Answer: 50%
What portion of the population has a complete Cof W? Correct Answer: 20-25%
Anatomic interrogation Correct Answer: B-mode/2D best
Physiologic/hemodynamic interrogation Correct Answer: Spectral/Doppler best
Hemorrhagic Stroke Correct Answer: Bleed; HTN
Ischemic Stroke Correct Answer: Oxygen interruption; Blood clot/emboli from Atherosclerosis
Which stroke is known to be the 3rd leading cause of death? Correct Answer: Ischemic Stroke
Small perforating artery obstruction Correct Answer: Occurs in elderly/diabetics
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