Abstract
Background and purpose
Flow velocity oscillation rate (FVOR) of the renal interlobar vein has been reported to be decreased in patients with urinary obstruction or diabetic nephropathy, and increased in those with hypertension during pregnancy. To clarify the clinical role of the renal interlobar venous FVOR, we investigated the flow velocity patterns of the renal vessels in patients with hypertension (HT) and/or diabetes (DM).
Methods and results
Pulsed-wave Doppler sonography was performed in 34 patients: 15 with HT, 10 with DM, and nine with both HT and DM (HT-DM). Each FVOR of the right and left interlobar veins was closely and positively correlated with the ipsilateral interlobar arterial resistive index (RI), especially in the HT group, but not with the estimated glomerular filtration rate. The right interlobar venous FVOR was decreased in the DM and HT-DM groups compared to the HT group.
Conclusion
The renal interlobar venous FVOR is strongly influenced by the arterial RI in HT patients, and is reduced in DM patients without an obvious relationship with diabetic nephropathy. These findings should be noted for the clinical application of renal interlobar venous flow analysis.
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Change history
23 October 2017
In the original publication of this paper the legend of Fig. 1 should read as: Fig. 1 Pulsed Doppler flow velocity recordings of the aorta (a), right renal artery (b), right renal interlobar artery (c), inferior vena cava (d), right renal vein (e), and right renal interlobar vein (f). PSV peak systolic velocity, EDV end-diastolic velocity, V MAX maximum velocity, V MIN minimum velocity
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All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008. Informed consent was obtained from all patients prior to their inclusion in the study.
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Yusuke Kudo, Taisei Mikami, Mutsumi Nishida, Kazunori Okada, Sanae Kaga, Nobuo Masauzi, Satomi Omotehara, Hitoshi Shibuya, Kaoru Kahata, and Chikara Shimizu do not have any relationship that could lead to a conflict of interest.
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A correction to this article is available online at https://doi.org/10.1007/s10396-017-0835-0.
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Kudo, Y., Mikami, T., Nishida, M. et al. Altered oscillation of Doppler-derived renal and renal interlobar venous flow velocities in hypertensive and diabetic patients. J Med Ultrasonics 44, 305–314 (2017). https://doi.org/10.1007/s10396-017-0770-0
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DOI: https://doi.org/10.1007/s10396-017-0770-0