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Journal of Ultrasound in Medicine, Vol 12, Issue 12 751-756, Copyright © 1993 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

Adjusted resistive index: a method to estimate rapidly renal blood flow: preliminary validation in hypertensives

J. D. Terry, S. H. Granger, B. C. Chen, J. A. Rysavy, D. M. Lefkowitz, B. Oldemeyer, W. A. Pettinger and H. C. Lee
Section of Radiology, Creighton University Medical Center, Omaha, Nebraska 68131.

The Doppler RI, measured in a blinded fashion, was correlated with RBF, RVR, and GFR calculated by simultaneous clearance measurements. Nine hypertensive patients were studied weekly while receiving increasing doses of the vasodilator minoxidil. In 36 studies, RI was significantly correlated with RBF (r = -0.42) but not with RVR or GFR. When RI values were adjusted for ERV, correlations strikingly improved and were further improved by adjustment for pulse pressure. The ARI allowed semiquantitative predictions of RBF and RVR more accurately than blood urea nitrogen or serum creatinine levels. Correlation with GFR was weak.


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M. E. Tublin, F. N. Tessler, and M. E. Murphy
Correlation between Renal Vascular Resistance, Pulse Pressure, and the Resistive Index in Isolated Perfused Rabbit Kidneys
Radiology, October 1, 1999; 213(1): 258 - 264.
[Abstract] [Full Text]


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