What question did this study set out to answer?

The aim is to describe Doppler sonography patterns of portal venous flow and its relation to body mass, inspiration, and position.

Flow pulsatility in the portal venous system: a study of Doppler sonography in healthy adults.

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Randomized trial describes venous flow pulsatility in healthy adults, indicating associations with body mass and position.

The aim is to describe Doppler sonography patterns of portal venous flow and its relation to body mass, inspiration, and position.
23 healthy adults were studied using Doppler sonography to assess portal venous flow characteristics.
Pulsatility was quantified with a venous pulsatility index (VPI) and correlated with body mass index (BMI).
Measurements were taken in supine and sitting positions and during different inspiration phases.
Mean pulsatility index (VPI) in the portal vein was 0.48 ± 0.31, with 12 of 23 subjects showing marked pulsatility (VPI > 0.5).
An inverse correlation was found between VPI and body mass index (r = -.76; p < .001).
Pulsatility decreased significantly during sitting (p < .05) and deep inspiration (p < .01), and antegrade flow peak velocities were highest in the third quarter of the cardiac cycle.

Gallix et al. (1997) studied this question.

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