Question

You have been requested to perform a Doppler analysis of the portal venous system. Which of the following describes the waveform you will see in the portal vein in a normal study?

A) Bidirectional

B) Triphasic

C) Mildly undulating

D) Highly pulsatile

E) Continuous

Answer 1

In a normal portal vein Doppler analysis, the expected waveform is mildly undulating, indicative of the steady blood flow characteristic of normal portal venous circulation.

Step-by-step explanation:

In a normal Doppler analysis of the portal venous system, the waveform you would expect to see in the portal vein is C) Mildly undulating. This type of waveform indicates a consistent, gentle flow of blood that is characteristic of normal portal venous circulation. The liver receives blood through the hepatic portal system and processes it before it exits via the hepatic vein into the inferior vena cava. The waveform in a normal portal vein is neither bidirectional, triphasic, highly pulsatile, nor continuous, but displays a steady undulation that reflects the blood flow within the vein under normal physiological conditions.