scholarly journals Scintigraphic Demonstration of Urine Extravasation Secondary to Acute Ureteral Obstruction: A Case Report and Some Considerations about Acute Ureteral Obstruction

TSW Urology ◽  
2006 ◽  
Vol 1 ◽  
pp. 198-207
Author(s):  
Federico M. Sarmiento ◽  
Arístides J.H. Sarmiento ◽  
Edgardo Bardoneschi ◽  
Arístides H. Sarmiento
2015 ◽  
Vol 9 (7-8) ◽  
pp. 428 ◽  
Author(s):  
Barak Rosenzweig ◽  
Jehonathan H Pinthus ◽  
Nir Kleinmann ◽  
Erel Joffe ◽  
Tomer Erlich ◽  
...  

Introduction: Rising levels of plasma creatinine in the setting of acute unilateral ureteral obstruction (AUUO) often reflects acute renal failure, mandating kidney drainage. We hypothesize that reabsorption of peri-renal urine extravasation (PUE), a common result of UUO, contributes significantly to the elevation in plasma creatinine, rendering the latter an inaccurate benchmark for renal function. We explored this hypothesis in a rat model of AUUO and PUE.Methods: In total, 20 rats were equally divided into 4 groups. Groups 1 and 2 underwent unilateral ligation of the ureter with infiltration of rat’s urine (index group) or saline (control) into the peri-renal space. Two additional control groups underwent perirenal injection of either urine or saline without AUUO. Plasma creatinine levels were determined immediately prior to the procedure (T0), and hourly for 3 hours (T1, T2 and T3). Renal histology was investigated after 3 hours.Results: Rats in the index group had a significantly greater increase in plasma creatinine levels over 3 hours compared to all other groups (p < 0.05). At T3, average plasma creatinine levels for the index group increased by 96% (0.49 ± 0.18 mg/dL) compared to 46% (0.23 ± 0.06 mg/dL increase) in the AUUO and saline group, and less than 15% rise in both the non-obstructed control groups. Our study limitations includes lack of spontaneous PUE and intraperitoneal surgical approach.Conclusions: Absorption of peri-renal urine in the presence of AUUO is a significant contributor to rising plasma creatinine levels, beyond those attributable to the obstruction alone, and may overestimate the extent of the true renal functional impairment.


2020 ◽  
Vol 8 (2) ◽  
pp. e001141
Author(s):  
Tobias Schwarz ◽  
Matthew Simpson ◽  
Jimmy Saunders ◽  
Nick Bommer

Retrocaval ureters form due to a congenital malformation of the caudal vena cava. This anomaly has been reported in cats and is usually incidental. Retrocaval ureters are rare in dogs, but have been associated with ureteral obstruction. When presented with a dog with hydroureter and hydronephrosis, an obstructed retrocaval ureter should be considered as a rare differential. This case report describes a left retrocaval ureter causing ureterohydronephrosis diagnosed by CT.


2019 ◽  
Vol 5 (7) ◽  
pp. e466
Author(s):  
Sridhar R. Allam ◽  
Ikponmwosa Iyamu ◽  
Gilbert Pan ◽  
Eryberto Martinez ◽  
Balamurugan Sankarapandian ◽  
...  

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