Liver and Portal Vein Function Quiz

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Questions and Answers

What veins form the portal vein?

  • Superior mesenteric vein and splenic vein (correct)
  • Inferior vena cava and splenic vein
  • Superior mesenteric vein and inferior vena cava
  • Inferior mesenteric vein and splenic vein

Which statement accurately describes the left and right portal veins?

  • The left portal vein branches into anterior and posterior subdivisions.
  • The right portal vein enters the left lobe of the liver.
  • The right portal vein enters the right lobe of the liver. (correct)
  • The left portal vein is shorter and larger than the right portal vein.

What makes the liver's blood supply unique?

  • It relies solely on the hepatic artery.
  • It has a dual blood supply. (correct)
  • It receives blood only from the aorta.
  • Over 90% of its blood supply comes from the portal vein.

Which of the following is not a cause of cirrhosis?

<p>Celiac disease (A)</p> Signup and view all the answers

What are the main components of the portal triad?

<p>Portal vein, hepatic artery, and bile duct (B)</p> Signup and view all the answers

What is a common complication associated with cirrhosis that can lead to upper gastrointestinal bleeding?

<p>Esophageal varices (C)</p> Signup and view all the answers

Which of the following is NOT a sonographic feature typically seen in cirrhosis?

<p>Hypoechoic nodules in the liver (D)</p> Signup and view all the answers

What is the primary mechanism behind portal hypertension in cirrhosis?

<p>Decreased liver perfusion due to fibrotic tissue (D)</p> Signup and view all the answers

Which procedure can relieve portal hypertension and prevent GI bleeding?

<p>Transjugular Intrahepatic Portosystemic Shunt (TIPS) (B)</p> Signup and view all the answers

Which of the following signs is NOT commonly associated with portal vein thrombosis (PVT)?

<p>Hematemesis (B)</p> Signup and view all the answers

What Doppler finding is indicative of portal vein thrombosis?

<p>Reversal of normal portal flow (B)</p> Signup and view all the answers

Which of the following is a symptom of portal hypertension?

<p>Ascites (B)</p> Signup and view all the answers

What is a classic sign of esophageal varices observed through ultrasound?

<p>Multiple cystic areas superior to aorta (C)</p> Signup and view all the answers

Which of the following conditions can lead to portal vein thrombosis?

<p>Heart failure (B)</p> Signup and view all the answers

Which of the following best describes the flow pattern in the hepatic portal vein in cirrhosis?

<p>Monophasic flow (A)</p> Signup and view all the answers

What is the typical pressure threshold for diagnosing portal hypertension?

<p>15 mm Hg (B)</p> Signup and view all the answers

Which of the following is a sign or symptom of portal vein thrombosis?

<p>Hypovolemia (B)</p> Signup and view all the answers

What does TIPS stand for in the context of treating portal hypertension?

<p>Transjugular Intrahepatic Portosystemic Shunt (D)</p> Signup and view all the answers

What type of vessels are involved in cavernous transformation of the portal vein?

<p>Collateral venous vessels (C)</p> Signup and view all the answers

Which of the following is NOT a main feature of cirrhosis?

<p>Increased liver volume uniformly (A)</p> Signup and view all the answers

Which ultrasound finding would NOT be expected in a patient with cirrhosis?

<p>Decreased liver size with smooth edges (D)</p> Signup and view all the answers

Portal hypertension can be caused by which of the following?

<p>All of the above (D)</p> Signup and view all the answers

What is the approximate length of the trunk of the portal vein?

<p>5 to 7 cm (D)</p> Signup and view all the answers

What is the most appropriate advice for a patient with cirrhosis regarding alcohol consumption?

<p>Limit alcohol consumption (B)</p> Signup and view all the answers

What is a common management strategy for variceal bleeding?

<p>Band ligation (D)</p> Signup and view all the answers

Which test is most useful for monitoring the progression of liver cirrhosis?

<p>Liver function tests (LFTs) (C)</p> Signup and view all the answers

Which drug class is primarily used to help reduce portal hypertension?

<p>Beta-blockers (D)</p> Signup and view all the answers

What diameter is considered indicative of a dilated portal vein on ultrasound?

<p>13 mm (B)</p> Signup and view all the answers

In cirrhosis, which echogenicity and surface structure is typically observed in the liver?

<p>Decreased size with a nodular and irregular surface (A)</p> Signup and view all the answers

What does the term 'hepatomegaly' specifically refer to?

<p>Enlargement of the liver (A)</p> Signup and view all the answers

What condition might a patient with abdominal distension, jaundice, and a history of heavy alcohol use be suspected of having?

<p>Liver cirrhosis (D)</p> Signup and view all the answers

Which structure is NOT part of the portal triad?

<p>Lymphatic vessel (C)</p> Signup and view all the answers

What percentage of the liver's blood supply is approximately provided by the portal vein?

<p>60% (D)</p> Signup and view all the answers

Which two sources comprise the liver's dual blood supply?

<p>Portal vein and hepatic artery (A)</p> Signup and view all the answers

A common cause of liver cirrhosis is:

<p>Viral hepatitis B &amp; C (D)</p> Signup and view all the answers

Cirrhosis leads to which of the following?

<p>Portal hypertension (A)</p> Signup and view all the answers

Which is not a common ultrasound feature of cirrhosis?

<p>Smooth liver surface (D)</p> Signup and view all the answers

Portal hypertension is characterized by:

<p>Increased resistance to blood flow through the liver (B)</p> Signup and view all the answers

The pressure threshold for diagnosing portal hypertension is:

<p>Above 10 mm Hg (A)</p> Signup and view all the answers

Which condition is most commonly associated with portal hypertension?

<p>Cirrhosis (A)</p> Signup and view all the answers

What is a potential complication of ascites?

<p>Spontaneous bacterial peritonitis (D)</p> Signup and view all the answers

Which imaging modality is preferred for initial assessment of suspected portal hypertension?

<p>Ultrasound with Doppler (B)</p> Signup and view all the answers

The primary goal of a TIPS procedure is to:

<p>Relieve portal hypertension (A)</p> Signup and view all the answers

Which ultrasound finding is typical in hepatocellular carcinoma?

<p>Presence of a hypoechoic mass (A)</p> Signup and view all the answers

Which of these does not primarily affect the liver?

<p>Cholecystitis (D)</p> Signup and view all the answers

Flashcards

Portal Venous System

A system of veins that drain blood from the spleen, pancreas, gallbladder, and gastrointestinal tract to the liver, supplying approximately 80% of the liver's blood.

Portal Vein Formation

The portal vein is formed from the union of the superior mesenteric vein and the splenic vein, carrying blood to the liver.

Portal Vein Branches

The portal vein branches into left and right portal veins, further subdividing into medial and lateral (left) and anterior and posterior (right) for blood distribution within the liver.

Portal Triad

A structural unit in the liver containing a portal vein branch, hepatic artery, and bile duct, within a connective tissue sheath.

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Liver's Dual Blood Supply

The liver receives blood from both the portal vein (80%) and the hepatic artery, aiding in the filtering and processing of blood.

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Cirrhosis

A chronic liver disease characterized by scarring and fibrosis of liver tissue.

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Portal Hypertension

Increased blood pressure in the portal vein due to obstructed blood flow through the liver.

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Esophageal Varices

Enlarged and swollen veins in the esophagus, a common complication of portal hypertension.

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Portal Vein Thrombosis (PVT)

Blood clot formation in the portal vein, obstructing blood flow.

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TIPS Procedure

A surgical procedure to create a shunt between the portal vein and the hepatic vein to relieve portal hypertension.

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Splenomegaly

Enlarged spleen, often associated with liver diseases like cirrhosis.

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Ascites

Accumulation of fluid in the abdominal cavity, a possible symptom of cirrhosis.

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Hepatomegaly

Enlarged liver, often seen as an initial sign of liver disease.

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HCC (Hepatoma)

Liver cancer, a potential complication of cirrhosis.

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Elevated LFTs

Abnormal liver function tests, indicating liver damage or dysfunction.

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Portal Vein Formation

The portal vein is created from merging the superior mesenteric and splenic veins.

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Liver Blood Supply

The liver gets blood from two sources: portal vein and hepatic artery.

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Portal Hypertension Pressure Threshold

Blood pressure in the portal vein becomes high (above 15mmHg) it's called portal hypertension.

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Portal Vein Thrombosis Symptom

A blood clot in the portal vein might cause diarrhea.

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Cirrhosis Feature (Not)

Increased liver volume is not a characteristic trait of cirrhosis: it involves decreased size and changed texture, not an overall growth.

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Portal Vein Blood Type

The portal vein carries deoxygenated blood to the liver, mainly from digestive organs.

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TIPS Procedure

A procedure to treat high liver pressure through a shunt (connection).

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Portal Hypertension Cause

Portal hypertension can arise from several issues, including liver problems or issues with the heart.

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Cirrhosis Management (Alcohol)

Reducing alcohol intake is critical in managing cirrhosis.

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Variceal Bleeding Treatment

Band ligation is a common method to treat bleeding varices.

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Cirrhosis Monitoring

Liver function tests (LFTs) are essential to track the progress of cirrhosis.

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Portal Hypertension Medication

Beta-blockers are frequently used to lower portal pressure.

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Portal Vein Diameter (Threshold)

A dilated portal vein, exceeding 13mm, is considered abnormal on ultrasound.

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Cirrhosis Ultrasound Appearance

Cirrhosis is often characterized by a nodular, irregular liver surface on ultrasound.

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Caput Medusae Sign

Caput medusae signifies enlarged veins from collateral circulation around the liver.

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Hepatomegaly Definition

Hepatomegaly refers to an enlarged liver.

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Portal Triad Components

The portal triad is a group of structures in the liver: portal vein branch, hepatic artery branch, and bile duct.

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Liver Blood Supply Percentage

The portal vein provides around 70% of the liver's blood supply.

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Liver Blood Sources

The liver receives blood from the portal vein and hepatic artery.

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Cirrhosis Cause (Key)

Viral hepatitis B & C are major causes of liver cirrhosis.

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Cirrhosis Complication

Cirrhosis results in portal hypertension, increased pressure in portal vein.

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Cirrhosis Ultrasound Feature (NOT)

Smooth liver surface is NOT commonly seen in cirrhosis ultrasound; instead, it shows a coarse echotexture.

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Cirrhosis Complication (NOT)

Hypothyroidism is NOT a direct complication typically linked to liver cirrhosis.

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Portal Hypertension Cause (Key)

Liver cirrhosis is a frequent cause of portal hypertension.

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Portal Hypertension Threshold

Portal hypertension is diagnosed when pressure in the portal vein exceeds 10 mm Hg.

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TIPS Procedure Goal

The primary purpose of a TIPS procedure is to reduce portal hypertension.

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TIPS Shunt Placement

TIPS creates a shunt between the portal vein and hepatic vein.

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PVT Sign (Early)

An early ultrasound sign of portal vein thrombosis (PVT) is a hyperechoic clot.

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PVT Cause

Severe dehydration can lead to portal vein thrombosis.

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Fatty Liver Progression

Fatty liver can potentially advance to steatohepatitis.

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Hepatocellular Carcinoma Ultrasound

A hypoechoic mass is a characteristic ultrasound finding in hepatocellular carcinoma.

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