Main content

Passive ureteral dilation secondary to ureteral stenting and

Show simple item record

dc.contributor.advisor Defarges, Alice
dc.contributor.author Vachon, Catherine
dc.date.accessioned 2016-09-08T13:49:50Z
dc.date.available 2017-07-22T05:00:31Z
dc.date.copyright 2016-07
dc.date.created 2016-07-22
dc.date.issued 2016-09-08
dc.identifier.uri http://hdl.handle.net/10214/9976
dc.description.abstract In children, passive ureteral dilation occurs after placement of a ureteral stent.Hubert 2005 The objectives of the thesis were to determine if passive ureteral dilation occurs in dogs after stent placement, and if ureteroscopy is feasible. The second part of the thesis evaluated biofilm production. In five healthy beagles, bilateral stent were placed. One stent was removed after two weeks (group 1) and the contralateral stent was removed after 6 weeks (group 2). A CT excretory urography was performed every 2 weeks for 10 weeks to measure the ureteral diameter. Ureteroscopy was attempted at the time of stent removal. Urinalysis and urine culture were performed every two weeks. The stent removed aseptically were evaluated for adhered bacteria using sonication and scanning electron microscopy. Also, seventy enterococci clinical isolates previously isolated were studied in vitro using microtitre plate assay. A repeated measures ANOVA as well as descriptive statistics were performed. Passive ureteral dilation occurred. Median ureteral diameter was 1.65 mm (range 1.3-2.7 mm) prior to stenting in both groups. At stent removal, ureteral diameter was 2.9 mm (2.4-3.1 mm, p<0.0001) in group 1 and 2.7 mm (2.1-3.4 mm, p=0.0016) in group 2. Ureteroscopy was successfully performed up to the renal pelvis in all dogs without any evidence of complications. Pyuria and positive urine culture were detected in 3 of 30 (10%) and 5 of 30 (17%) samples collected, respectively. None of the dogs had signs of lower urinary tract infection. After sonication, there was no growth noted from any stents at week 2 but bacteria were identified at week 6. Scanning electron microscopy failed to identify bacteria. Of the seventy enterocci isolates tested, 42/70 (53%) produced biofilm; 20/23 (87%) were E. faecalis and 16/47 (34%) were E. faecium. Biofilm production was common, especially for the E. faecalis isolates. In conclusion, passive ureteral dilation occurs within 2 weeks of ureteral stent placement. Ureteroscopy can be performed at stent removal. Bacteriuria may occur within few weeks following stent placement. Lastly, enterococcal isolates produced biofilm, especially Enterococcus faecalis. en_US
dc.description.sponsorship PET trust funds en_US
dc.language.iso en en_US
dc.subject passive ureteral dilation, ureteroscopy, biofilm, enterococcus, ureter, sonication, scanning electron microscopy en_US
dc.title Passive ureteral dilation secondary to ureteral stenting and en_US
dc.type Thesis en_US
dc.degree.programme Clinical Studies en_US
dc.degree.name Doctor of Veterinary Science en_US
dc.degree.department Department of Clinical Studies en_US
dc.rights.license All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.


Files in this item

Files Size Format View
Vachon_Catherine_201607_DVSc.pdf 1.215Mb PDF View/Open

This item appears in the following Collection(s)

Show simple item record