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Assessment of ureterovesical jet dynamics in obstructed ureter by urinary stone with color Doppler and duplex Doppler examinations

Jandaghi, Ali Babaei and Falahatkar, Siavash and Alizadeh, Ahmad and Kanafi, Alireza Rajabzadeh and Pourghorban, Ramin and Shekarchi, Babak and Zirak, Amin Keshavarz and Esmaeili, Samaneh (2013) Assessment of ureterovesical jet dynamics in obstructed ureter by urinary stone with color Doppler and duplex Doppler examinations. Urolithiasis, 41 (2). pp. 159-163. ISSN 2194-7228

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Abstract

This study was designed to evaluate ureterovesical jet dynamics in obstructed ureter and to compare it with those of contralateral unobstructed side. Forty-six patients with diagnosis of ureteral stone, based on imaging findings in computed tomography were enrolled in this study. The gray-scale ultrasound exam from both kidneys and urinary bladder was performed. Then, ureterovesical jet characteristics including ureteral jet frequency, duration and peak velocity were assessed by color Doppler and duplex Doppler studies in both obstructed and unobstructed ureters by a radiologist, 15-30 min after oral hydration with 750-1,000 mL of water. When compared with contralateral normal side, the ureterovesical jet in obstructed ureter showed less frequency (0.59 vs. 3.04 jets/min; P < 0.05), shorter duration (1.24 vs. 5.26 s; P < 0.05) and lower peak velocity (5.41 vs. 32.09 cm/s; P < 0.05). The cut-off points of 1.5 jets/min, 2.5 s and 19.5 cm/s for difference of ureteral jet frequency, duration and peak velocity between obstructed and contralateral normal ureters yielded sensitivities of 97.8, 95.6 and 100 % and specificities of 87, 87.9 and 97.8 %, respectively for diagnosis of ureteral obstruction. Given the safety of Doppler study and significant differences in flow dynamics of obstructed versus unobstructed ureters, our findings demonstrated the utility of Doppler ultrasound examination as a useful adjunct to gray-scale ultrasound by improving the accuracy of ultrasound exam in diagnosis of ureteral obstruction.

Item Type: Article
Subjects: WA Public Health
WX Hospital and other health Facilities
Divisions: Faculty of Medicine, Health and Life Sciences > School of Medicine
Depositing User: ePrint Admin Admin
Date Deposited: 01 Jul 2013 04:42
Last Modified: 01 Jul 2013 04:42
URI: http://eprints.ajaums.ac.ir/id/eprint/25

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