Ultrasonic duplex system to facilitate assessment of portal blood flow velocity

Tetsuya Iwanaga, Y. Iso, M. Hashizume, N. Koyanagi, S. Kitano, K. Sugimachi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The usefulness of an ultrasonic duplex system to assess portal blood flow was investigated. In a model involving a steady flow through a vinyl tube in agar, there was a significant linear correlation between the maximum blood flow velocity measured by this system (V-max) and the mean blood flow velocity calculated from the actually measured blood flow volume (V-mean), that is, V-mean = 0.53 × V-max was obtained (r = 0.994; n = 47). This equation was used to calculate the mean portal blood flow velocity by this system (V-dopp) in 10 patients with liver disease, and the findings were compared with data simul-taneously obtained by cineangiographic mapping of Lipiodol droplets released into the portal vein through a catheter placed in situ at the time of surgery (V-cine). A linear correlation between V-dopp and V-cine was statistically significant (r = 0.970; n = 13), and the regression line was V-cine = 1.29 x V-dopp -2.11. The ultrasonic duplex system proved reliable for a quantitative assessment of portal hemodynamics.

Original languageEnglish
Pages (from-to)178-184
Number of pages7
JournalEuropean Surgical Research
Issue number3
Publication statusPublished - 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Surgery


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