urinary tract dilation
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Author(s):  
Sang-Kwon Lee ◽  
Seongjae Hyeong ◽  
Soyeon Kim ◽  
Chang-Yeop Jeon ◽  
Kyung-Seob Lim ◽  
...  

Abstract OBJECTIVE To assess the usefulness of magnetic resonance urography (MRU) for the visualization of nondilated renal pelvises and ureters in dogs and to compare our findings for MRU versus CT urography (CTU). ANIMALS 9 healthy Beagles. PROCEDURES Dogs underwent CTU, static-fluid MRU, and excretory MRU, with ≥ 7 days between procedures. Contrast medium was administered IV during CTU and excretory MRU, whereas urine in the urinary tract was an intrinsic contrast medium for static-fluid MRU. For each procedure, furosemide (1 mg/kg, IV) was administered, and reconstructed dorsal plane images were acquired 3 minutes (n = 2) and 7 minutes (2) later. Images were scored for visualization of those structures and for image quality, diameters of renal pelvises and ureters were measured, and results were compared across imaging techniques. RESULTS Excretory MRU and CTU allowed good visualization of the renal pelvises and ureters, whereas static-fluid MRU provided lower visualization of the ureters. Distention of the renal pelvises and ureters was good in excretory MRU and CTU. Distention of the ureters in static-fluid MRU was insufficient compared with that in CTU and excretory MRU. Distinct artifacts were not observed in CTU and excretory MRU images. Static-fluid MRU images had several mild motion artifacts. CLINICAL RELEVANCE Our findings indicated that excretory MRU with furosemide administration was useful for visualizing nondilated renal pelvises and ureters of dogs in the present study. When performing MRU for the evaluation of dogs without urinary tract dilation, excretory MRU may be more suitable than static-fluid MRU.


2021 ◽  
Vol 42 (2) ◽  
pp. 85-89
Author(s):  
Siriluck Satonkiatngam ◽  
◽  
Atchara Mahayosnond ◽  

Objective: To determine the difference in renal function and rate of surgical intervention between neonates with diffuse and segmental parenchymal thinning. Materials and Methods: First postnatal ultrasonography images of neonates with prenatal urinary tract dilation were evaluated and measurements taken. Neonates with parenchymal thinning were categorised into segmental and diffuse parenchymal thinning groups using the medullary to intermedullary ratio. A statistical correlation of differential renal function and rate of surgical intervention between the two groups was calculated and evaluated using an independent t-test and Kaplan-Meier curve with Log-rank test, respectively. Results: Of the 20 neonates, 10 had segmental parenchymal thinning, while the other 10 had diffuse parenchymal thinning. Mean differential renal function was 49.3% in the segmental parenchymal thinning group compared to 45.8% in the diffuse group (p = 0.400). Five patients (50%) from the segmental parenchymal thinning group underwent pyeloplasty in comparison to seven patients (70%) from the diffuse group (p = 0.430) Conclusion: There were no significant differences in renal function or rate of surgical intervention between neonates with segmental parenchymal thinning and diffuse parenchymal thinning. Neonates with segmental parenchymal thinning need to be monitored as closely as those with diffuse parenchymal thinning for early detection of renal deterioration and to identify potential need for surgical intervention.


2021 ◽  
Author(s):  
Peiqiang Li ◽  
Fuyun Liu ◽  
Yan Huang

Abstract Background To investigate the changes in ultrasonic measurements of nonreflux upper urinary tract dilation in infants with febrile urinary tract infection (UTI).Methods There were 28 cases of nonreflux upper urinary tract dilatation with febrile UTI: 14 cases of ureteropelvic junction obstruction (UPJO) (14 kidneys) and 14 cases of ureterovesical junction obstruction (UVJO) (16 kidneys). Changes in anteroposterior renal pelvic diameter (APD) and ureteral dilatation during infection and after infection were compared in UPJO and UVJO patients, respectively.Results In the UPJO with febrile UTI group, the APD was 24.1±10.0 mm at the time of UTI and 16.6±7.0 mm 1 week after infection recovery (P<0.001). In the UVJO with febrile UTI group, the APD was 19.3±8.5 mm at the time of UTI and 15.2±7.7 mm 1 week after infection recovery (P<0.001). In the UVJO with febrile UTI group, the ureteric diameter was 11.0±3.2 mm during UTI and 6.8±2.6 mm 1 week after infection recovery (P<0.001).Conclusions In UPJO patients, the APD decreased after febrile UTI treatment compared with that during infection. In UVJO patients, the APD and ureteric diameter decreased after febrile UTI treatment compared with that during infection.


2021 ◽  
Vol 224 (2) ◽  
pp. S563
Author(s):  
Celeste A. Green ◽  
Jenna C. Adams ◽  
William Goodnight ◽  
David M. Stamilio ◽  
Kartik K. Venkatesh

2020 ◽  
Vol 30 (6) ◽  
Author(s):  
Mehrzad Mehdizadeh ◽  
Sahar Eftekharzadeh ◽  
Sedighe Hosseini Shabanan ◽  
Maryam Sobhani ◽  
Abdol-Mohammad Kajbafzadeh

Background: Upper urinary tract dilation, the most common urological manifestation of the Wolfram syndrome (WS), is mainly non-obstructive and secondary to other components of the disease such as diabetes insipidus. Misdiagnosis of the type of the hydroureter in Wolfram patients and encountering them as obstructive uropathies has led to ineffectual surgeries such as ureter re-implantation. Based on previous studies drainage related ultrasonography (DRUS) is a beneficial means of distinction between obstructive and non-obstructive hydroureters. Objectives: To avoid unnecessary interventions in patients with WS by detecting hydroureters’ types using DRUS. Methods: Seven patients (14 ureters) with a mean ± SD age of 24.43 ± 4.25 months who were diagnosed with WS were included in this retrospective study. The definite diagnosis of the non-obstructive type of hydroureter was assessed by appropriate imaging modalities. The maximum diameter of these 14 ureters, before (D1) and after (D2) 3 hours of catheterization were observed by ultrasonography. Values were recorded as D ratio ( [(|D1 - D2|)/D1] × 100) and the cutoff point of 22% for D ratio was set to discriminate the subtypes of the hydroureter. Results: Measurement of maximum diameter of ureter prior to catheterization indicated a mean ± SD diameter of 20.64 ± 2.73 mm; decreasing to 11.07 ± 2.64 mm after 3 hours of catheterization which indicates a significant decrease. Mean D ratio of 14 hydroureters was 45.95 ± 13.01% which indicated significantly higher percentage than 22%, revealing that hydroureters’ type in WS is non-obstructive. Conclusions: DRUS is a useful method for the assessment of the hydroureter’s type in WS and it could prevent performing unnecessary surgeries in WS patients.


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