Evaluation of portal vascular resistance using an intraoperative Doppler ultrasound
Ito, T.; Matsuda, Y.; Oguchi, Y.; Ito, T.; Matsuda, H.
Hepato-Gastroenterology 49(44): 501-503
2002
ISSN/ISBN: 0172-6390 PMID: 11995482 Document Number: 542446
Background/Aims: To evaluate portal vascular resistance using Doppler ultrasound intraoperatively. Methodology: We measured maximum flow velocities and pressures of umbilical portion of the left portal branch before and after clamping of the right main branch of the Glisson's sheath. We proposed a new index, simplified portal resistive index, that was the ratio of the difference of the portal venous pressure to the difference of maximum portal flow velocity. Results: There were good correlations between portal vascular resistance and simplified portal resistive index. Simplified portal resistive index was found to become higher as fibrotic changes progressed, and there were significant differences between normal liver, chronic hepatitis, and liver cirrhosis. Conclusions: Simplified portal resistive index evaluated using intraoperative Doppler ultrasound is an easy and reliable index for assessing portal vascular resistance during liver surgery.