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DMST 265 Vascular Sonography 1 > Quiz 4: Vasculature review > Flashcards

Quiz 4: Vasculature review Flashcards

1
Q

What is the most common cause of portal hypertension in North America?

A

Hepatitis C

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2
Q

Which of the following portal vein diameter measurements would first indicate possible portal hypertension?

  1. 11mm
  2. 12mm
  3. 13mm
  4. 14mm
A

13mm

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3
Q

A sonographer measures a portal vein diameter of 15mm indicating possible portal hypertension. What other extra-hepatic vessels should the sonographer evaluate to assess the sensitivity of the findings?

A

Splenic vein and SMV

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4
Q

What percentage of blood flow is supplied to liver via the hepatic artery?

A

25%

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5
Q

Which of the following characteristics suggest congestive heart failure as the cause of portal hypertension?

  1. Reversed portal vein flow
  2. Pulsative portal flow and dilated IVC
  3. Normal IVC and dilated hepatic veins
  4. Non-phasic MPV and reduced velocities
A

Pulsative portal flow and dilated IVC

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6
Q

What porto- systemic collateral is indicated by the arrow in this view of the liver?

A

Umbilical vein

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7
Q

Which of the following is a common finding of chronic portal vein thrombosis?

A

Cavernous transformation

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8
Q

Which of the following is not a possible precursor to Budd-Chiari syndrome?

  1. Thrombosis
  2. Tumor invasion
  3. Sinusoidal occlusion
  4. Hypercoagulable blood disorders
A

Sinusoidal occlusion

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9
Q

Which of the following main portal vein velocities indicates a shunt failure from a TIPS procedure?

  1. less than 30 cm/s
  2. Less than 90cm/s
  3. Greater than 30cm/s
  4. Greater than 90
A

Less than 30 cm/s

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10
Q

Which of the following is the most important information provided with a duplex study of the early post operative liver transplant?

  1. A-V fistula detection
  2. Hepatic artery patency
  3. Biliary duct assessment
  4. Pseudoaneurysm formation
A

Hepatic artery patency

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11
Q

How would a sonographer describe the spectral tracing in this image?

A

A normal multiphasic flow

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12
Q

What is the most common site for stenosis of a TIPS shunt?

A

Hepatic vein end

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13
Q

A patient presents to the department for a portal hypertension assessment. What would be the likely cause of this patient’s portal hypertension based on this spectral tracing?

A

Congestive heart failure

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14
Q

How would a sonographer describe this spectral tracing of the main portal vein?

A

Biphasic flow

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15
Q

Which of the following is a common sign of cirrhosis during a physical examination?

A

Jaundice

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16
Q

Which of the following collaterals is the reason why scanning the splenic vein at the splenic hilum may give a normal result?

A

Splenorenal

17
Q

A patient presents to the department 1 year post TIPS placement for portal hypertension. During the exam the velocity of 210 cm/s is measured at a point of aliasing colour doppler in the stent. What is the most likely diagnosis?

A

Neo- intimal hyperplasia

18
Q

A patient is surveyed post liver transplant and the hepatic artery waveform demonstrates a resistive index of 0.75. What is the likely diagnosis for this patient

A

Normal resistance because it is POST liver transplant

19
Q

Which of the following components of the hepatic waveform indicates an increase in the right sided heart pressures?

  1. A absent A wave
  2. A decreased S wave
  3. An increased A wave
  4. An increased D wave
A

A decreased S wave

20
Q

Which of the following diameters is considered dilated when measuring the IVC?

  1. 1.5
  2. 2.0
  3. 2.5
  4. 3.0
A

3.0

21
Q

Based on the information provided in this image, what type of portal hypertension is suspected?

A

Post- hepatic

22
Q

Hepatopetal flow is seen in the hepatic veins during phases of the cardiac cycle normally. T/F?

A

True

23
Q

Which of the following pitfalls must be considered when scanning a suspected portal vein thrombosis?

A
  1. Inadequate doppler angle
  2. Undetected low velocities
  3. Undetected tumor
  4. All of the above
24
Q

When scanning in a transverse plane over the portal confluence in an anterior window, which direction do you rotate the transducer to adequately measure the main portal vein?

A

Clockwise

25
Q

What is the commonly referred name for TIPS?

A

Trans-jugular intrahepatic portosystemic shunt

DMST 265 Vascular Sonography 1 (19 decks)

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