USIDMS Hepatic Doppler
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What two vessels constitute hepatic inflow? | The Hepatic Artery and Portal Vein.
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| True or False: Sudden onset of ascites, acute abdominal pain, and elevated D-dimer are all indications for a Hepatic Doppler study. | True.
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| True or False: The hepatic veins are intersegmental and contain valves. | False. They do not have valves.
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| What two things affect portal vein diameter and velocity of flow? | Patient respiration and ingestion of food.
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| When is portal vein diameter increased? | Portal Hypertension, Congestive Heart Failure, Constrictive pericarditis, and Portal Vein Thrombosis.
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| What do the Doppler Spectral Waveforms of the portal vein look like? | Monophasic and slightly pulsatile or undulating.
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| What does the Hepatic Vein waveforms look like? | Pulsatile triphasic waveform with antegrade and retrograde flow. It changes with the cyclic pressure changes within the heart.
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| What does the Valsalva maneuver do to the Hepatic Vein waveform? | Diminishes the waveform pulsatility.
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| True or False: The Portal Vein and the Hepatic Artery carry blood flowing in the same direction. | True. It is Hepatopetal Flow- toward the liver.
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| What is the "hepatic buffer response"? | When the portal blood flow increases, hepatic arterial flow decreases and vice versa.
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slwilliams2
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