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Ureteral Wall Thickness is an Independent Parameter Affecting the Success of Extracorporeal Shock Wave Lithotripsy Treatment in Ureteral Stones above the Iliac Crest
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  • Emre Bulbul,
  • Fahri Yavuz Ilki,
  • Mehmet Hamza Gultekin,
  • Ahmet Erozenci,
  • Onur Tutar,
  • Sinharib Citgez,
  • Nejat Tansu,
  • Bulent Onal
Emre Bulbul
Istanbul University-Cerrahpasa Cerrahpasa Faculty of Medicine
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Fahri Yavuz Ilki
Istanbul University-Cerrahpasa Cerrahpasa Faculty of Medicine
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Mehmet Hamza Gultekin
Haseki Education Research Hospital
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Ahmet Erozenci
Istanbul University-Cerrahpasa Cerrahpasa Faculty of Medicine
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Onur Tutar
Istanbul University-Cerrahpasa Cerrahpasa Faculty of Medicine
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Sinharib Citgez
Istanbul University-Cerrahpasa Cerrahpasa Faculty of Medicine
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Nejat Tansu
Istanbul University-Cerrahpasa Cerrahpasa Faculty of Medicine
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Bulent Onal
Istanbul Universitesi-Cerrahpasa
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Abstract

Background: To investigate the relationship between ureteral wall thickness (UWT) and other variables of patients who underwent extracorporeal shock wave lithotripsy (SWL) in the primary treatment of the ureteral stone above the iliac crest level. Material and methods: A total of 147 patients aged 18 years and older, who underwent SWL in our clinic between December 2016 and December 2019 for the treatment of ureteral stones above the iliac crest level and had a non-contrast-enhanced abdominal computed tomography (NCCT) scans before the procedure were included in the clinical study. The results were evaluated at three months after SWL. The absence of residual fragments was considered as stone-free status, and the existence of any size residual fragment was considered as treatment failure. Results: In our study, the mean age of the patients was 42.4 ± 12.8 years, and the stone-free rate was 92.5%. The median transverse stone size was 7.5 mm (min 2.8 - max 15), and the median UWT was 4.2 mm (1 - 8.7). In the multivariate analysis, UWT (p = 0.002) and multiple stone presence (p = 0.027) were found to be independent factors affecting stone-free status. In the receiver operating characteristic (ROC) curve analysis, the optimal threshold value for UWT was determined as 5.25 mm. Conclusions: We found that UWT was the most important independent variable associated with increased failure in SWL treatment. The presence of multiple stones was another independent factor that increased failure rates. Using SWL technology through experience accumulated with the mechanical hardware of the machine, we can select patients who are more suitable for this treatment and improve treatment outcomes.

Peer review status:ACCEPTED

01 Dec 2020Submitted to International Journal of Clinical Practice
01 Dec 2020Submission Checks Completed
01 Dec 2020Assigned to Editor
03 Dec 2020Reviewer(s) Assigned
16 Mar 2021Review(s) Completed, Editorial Evaluation Pending
08 Apr 20211st Revision Received
09 Apr 2021Submission Checks Completed
09 Apr 2021Assigned to Editor
09 Apr 2021Reviewer(s) Assigned
11 Apr 2021Review(s) Completed, Editorial Evaluation Pending
14 Apr 2021Editorial Decision: Accept