Dilated renal collecting systems:Differentiating obstructive from nonobstructive dilation using duplex doppler ultrasound
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چکیده
منابع مشابه
Dilated renal collecting systems: differentiating obstructive from nonobstructive dilation using duplex Doppler ultrasound.
Two patients with ileal loop urinary diversions, studied with real-time and Doppler sonography ("duplex sonography") of the kidneys, were shown to have dilated intrarenal collecting systems. Resistive index measurements calculated from the Doppler signal correctly identified obstructive dilatation in 1 case and nonobstructive dilatation in the other.
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resistive and pulsatility index (RI, PI ). Both are equally Introduction as useful although the RI is probably more commonly used. An RI <0.7 is normal, >0.9 abnormal, and Colour Doppler ultrasound facilitates not only a global between there is a large grey area. A PI <1.5 is assessment of the intrarenal vasculature but can also normal, and >1.8 abnormal. The higher the RI or PI be targetted to...
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Nevertheless, obstruction rarely can occur without hydronephrosis, when the ureter and renal pelvis are encased in a fibrotic process and unable to expand. In contrast, mild dilation of the collecting system of no functional significance is not unusual. Even obvious hydronephrosis in some cases may not be associated with functional obstruction [70]. Diuresis renography is helpful when the funct...
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INTRODUCTION This study has aimed to assess the hemodynamic parameters, Renal Resistive Index (RI), Peak Systolic Velocity (PSV), End-Diastolic Velocity (EDV) and Blood Flow of the Renal Artery (FR) by Doppler Ultrasound for diagnosis and monitoring postsurgical partial chronic obstructive uropathy. MATERIAL AND METHODS Fifty pigs were used. The experiment was divided into three phases. Phase...
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ژورنال
عنوان ژورنال: Urology
سال: 1991
ISSN: 0090-4295
DOI: 10.1016/0090-4295(91)80206-m