USIDMS Hepatoportal System
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| What are the two sources of liver blood supply? | Hepatic Artery and Portal Vein
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| What are limitations to a successful exam? | Patient obesity, diffuse liver disease, ascites, and bowel gas
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| What should the portal vein measure during quiet respiration? | Less than or equal to 13 mm
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| What kind of waveforms do hepatic veins usually exhibit? | Pulsatile, triphasic with both antegrade and retrograde flow
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| What is the hepatic buffer response? | When portal blood flow increases, hepatic arterial blood flow decreases and vice versa.
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| How is portal hypertension defined? | An abnormal increase in portal venous pressure as a result of obstruction of blood flow through the liver
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| What is the most common collateral shunt? | The coronary-gastroesophageal route
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| What is Budd-Chiari Syndrome? | Obstruction of the hepatic venous outflow tract due to a thrombus or tumor.
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| If portal venous thrombosis persists for 12 months without substantial lysis, what can occur? | The development of periportal collateral veins called cavernous transformation.
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| What can be used to decrease the pressure in the portal venous system? | Transjugular Intrahepatic Portosystemic Shunts
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