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Title: Comparative ultrasound evaluation of renal resistive index in hypertensive and normotensive adults in ibadan, south western, Nigeira.
Authors: Atalabi, O. M
Yusuf, B. P.
Issue Date: 2012
Publisher: Nigerian Association of Nephrology
Abstract: Background: Renal resistive index is a useful measure for quanitifying alterations in renal blood flow.It is considered to be a refection of renal parenchymal vascular resistance. The aim of this study is to determine the difference in renal resistive index between patients with essential hypertension and non- hypertensive control group. Patients and Methods: Seventy-two patients with essential hypertension of varying duration and 68 patients without hypertension were evaluated sonographically in this prospective study. The renal resistive index was determined by use of doppler ultrasound of the interlobar arties. Results: Mean renal resistive index in the hypertensive patients was 0.60+0.04 (+SD) and in the controls was 0.56+0.04 (+SD) (p=<0.001). Renal resistive index correlated significcantly with systolic blood pressure (r=0.382), (p=<0.001) and diastolic blood pressure (r= 0.382, p=<0.001) and diastolic blood pressure (r=0.364,p=<0.001). It correlated weakly with the body mass index (r=).170, 0.044). No significant association was found with age, gender, duration of hypertension and creatinine clearance, mulitple regression linear analysis showed systolic blood pressure to be the only independent variable influencing renal resistive index.
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