Criteria for Ureteral Obstruction by Functional Imaging of the Upper Urinary Tract

2015 ◽  
pp. 225-231
Author(s):  
W. M�ller-Schauenburg ◽  
U. Hofmann ◽  
U. Feine ◽  
A. Flach ◽  
W. D. Erdmann
Keyword(s):  
Urinary Tract ◽  
Functional Imaging ◽  
Ureteral Obstruction ◽  
Upper Urinary Tract

Pyeloureteral dynamics in the intact and chronically obstructed multicalyceal kidney

1981 ◽  
Vol 241 (5) ◽  
pp. R398-R411 ◽  
Author(s):  
C. E. Constantinou ◽  
J. C. Djurhuus
Keyword(s):  
Urinary Tract ◽  
Ureteral Obstruction ◽  
Intravenous Infusion ◽  
Upper Urinary Tract ◽  
Urine Flow ◽  
Hierarchical Organization ◽  
Bolus Volume ◽  
Pelvic Contractions ◽  
The Mean ◽  
Pelvic Pressure

The transport of urine in the upper urinary tract of the multicalyceal kidney was studied in healthy and chronically obstructed pigs in terms of renal pelvic pressure, rate of and coordination of ureteral contractions, and bolus volume. The variations of these parameters to diuresis was examined by incremental elevation of urine output effected by intravenous infusion of mannitol. In 16 healthy animals the mean variation in urine flow was 0.01-3.20 ml/min, the change in peristaltic rate ranged from 0.763 to 5.125 min-1, and bolus volume from 0.003 to 2.083 ml.. In 14 chronically obstructed kidneys, for a mean variation in urine flow of 0.006-5.4 ml/min, peristaltic rate ranged from 0.237 to 6.095 min-1 and bolus volume from 0.00 to 1.80 ml. Discoordinated contractions, bursts of peristalsis, and incompletely transmitted pelvic contractions were characteristic of a chronically obstructed system. These observations are compared with the unobstructed unicalyceal and multicalyceal kidney. The disrupting impact of chronic ureteral obstruction on the hierarchical organization of the pyeloureteral pacemaker system is discussed.

FUNCTIONAL IMAGING OF UPPER URINARY TRACT NEOPLASM BY DIFFUSION-WEIGHTED MRI

2008 ◽  
Vol 7 (3) ◽  
pp. 138
Author(s):  
S. Yoshida ◽  
H. Masuda ◽  
C. Ishii ◽  
N. Numao ◽  
Y. Sakai ◽  
...  
Keyword(s):  
Urinary Tract ◽  
Functional Imaging ◽  
Upper Urinary Tract ◽  
Diffusion Weighted Mri ◽  
Diffusion Weighted

Fluconazole Treatment in Torulopsis Glabrata Upper Urinary Tract Infection Causing Ureteral Obstruction

1992 ◽  
Vol 147 (4) ◽  
pp. 1116-1117 ◽  
Author(s):  
Xavier Corbella ◽  
Jordi Carratala ◽  
Manuel Castells ◽  
Begona Berlanga
Keyword(s):  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Tract Infection ◽  
Ureteral Obstruction ◽  
Upper Urinary Tract ◽  
Torulopsis Glabrata

MP-14.02: Initial experience of functional imaging of upper urinary tract urotherial carcinoma by diffusion-weighted MRI

Urology ◽  
2007 ◽  
Vol 70 (3) ◽  
pp. 111
Author(s):  
S. Yoshida ◽  
H. Masuda ◽  
C. Ishii ◽  
Y. Matsuoka ◽  
N. Numao ◽  
...  
Keyword(s):  
Urinary Tract ◽  
Functional Imaging ◽  
Upper Urinary Tract ◽  
Initial Experience ◽  
Diffusion Weighted Mri ◽  
Diffusion Weighted

scholarly journals Quantitative evaluation of upper urinary tract pump function in pigs with acute unilateral lower ureteral obstruction by 640-slice dynamic volume CT

BMC Urology ◽  
2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Chongwen Mao ◽  
Cong Peng ◽  
Song Li ◽  
Liling Chen ◽  
Mengjing You ◽  
...  
Keyword(s):  
Urinary Tract ◽  
Renal Pelvis ◽  
Ureteral Obstruction ◽  
Upper Urinary Tract ◽  
Acute Obstruction ◽  
Left Ureter ◽  
Pump Function ◽  
Continuous Dynamic ◽  
Volume Ct ◽  
Dynamic Volume Ct

Abstract Background It is a challenging problem to differentiate obstructive hydronephrosis from noninvasive evaluation of renal pelvis and ureteral motility in patients. The purpose of this study was to explore the value of 640-slice dynamic volume CT (DVCT) in the quantitative measurement of upper urinary tract (UUT) pump function after acute unilateral lower ureteral obstruction in pigs. Methods In this study, a perfusion pig model was constructed by constant pressure perfusion testing of the renal pelvis and left nephrostomy. The perfusion and pressure measuring devices were connected to create a state of no obstruction and acute obstruction of the lower part of the left ureter. After successful modelling, continuous dynamic volume scanning of the bilateral renal excretion phase was performed with 640-slice DVCT, and pump functions of the renal pelvis and part of the upper ureter were calculated and analysed. No obstruction or acute obstruction of the lower part of the left ureter was observed. Pump functions of the renal pelvis and part of the upper ureter were determined. Results The results showed that after LUUT fistulostomy, the time difference between the average UUT volume and positive volume value increased gradually, and the calculated flow velocity decreased, which was significantly different from that of the RUUT. The volume difference of the LUUT increased significantly in mild obstruction. In the bilateral control, the volume change rate of the LUUT increased with mild obstruction and decreased with severe obstruction, and there was a significant difference between the left and right sides. Conclusion The continuous dynamic volume scan and measurement of 640-slice DVCT can obtain five pump function datasets of UUT in pigs with acute lower ureteral obstruction.

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