Ureteric wall thickness as a novel predictor for failed retrograde ureteric stent placement

Auteurs-es

  • Nicholas S. Dean Division of Urology, Department of Surgery, University of Alberta https://orcid.org/0000-0002-2202-3532
  • Patrick Albers Urology Resident - University of Alberta https://orcid.org/0000-0002-8032-8393
  • Ambikaipakan Senthilselvan School of Public Health, University of Alberta
  • Alexandra Bain Division of Urology, Department of Surgery, University of Alberta
  • Matthew Mancuso Division of Urology, Department of Surgery, University of Alberta
  • Ryan McLarty Division of Urology, Department of Surgery, University of Ottawa
  • Trevor Schuler Division of Urology, Department of Surgery, University of Alberta
  • Timothy A. Wollin Division of Urology, Department of Surgery, University of Alberta
  • Shubha K. De Division of Urology, Department of Surgery, University of Alberta

DOI :

https://doi.org/10.5489/cuaj.8845

Mots-clés :

UReteral Wall Thickness, Failed Ureteric Stent, Nephrostomy Tube, Retrograde Stent, Obstructing Calculus, Septic Stone

Résumé

INTRODUCTION: We sought to identify predictors of failed retrograde ureteric stent (FRS) placement in the setting of obstructing ureteric calculi. In addition to patient- and stone-specific characteristics, we also considered computed tomography (CT) measures of ureteric wall thickness (UWT), as it has shown clinical potential in predicting outcomes of shockwave lithotripsy, ureteroscopy, and spontaneous stone passage.

METHODS: We performed a retrospective, case-control study comparing patients who had successful retrograde stent (SRS) insertions with those who failed stent placement and ultimately required nephrostomy tube (NT) insertion (2013–2019). Patients were identified using administrative data from a shared electronic medical record (capturing all urology patients in our geographic area) and a prospective database capturing all institutional interventional radiology procedures. Patient demographics, as well as clinical and stone characteristics, were then collected, and imaging manually reviewed. Statistical analysis was performed using univariate and multivariate logistic regression analysis in collaboration with a statistician.

RESULTS: A total of 109 patients met inclusion for analysis (34 FRS, 75 SRS). The most common indication for stent insertion included sepsis (79%). On multivariate analysis, both acute kidney injury as primary indication for stent insertion (odds ratio [OR] 9.16, 95% confidence interval [CI] 1.91–44.00, p=0.006) and UWT (OR 0.34, 95% CI 0.15–0.74, p=0.007) were found to be significantly associated with FRS placement. A receiver operator characteristic curve analysis demonstrates an optimal UWT cutoff of 3.2 mm (sensitivity 60.6%, specificity 83.3%).

CONCLUSIONS: Elevated UWT and acute kidney injury as an indication for urgent urinary decompression in the setting of obstructing ureteric stones are predictive of FRS placement. These patients may benefit from upfront nephrostomy tube insertion.

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Publié-e

2024-07-15

Comment citer

Dean, N. S., Albers, P., Senthilselvan, A., Bain, A., Mancuso, M., McLarty, R., … De, S. K. (2024). Ureteric wall thickness as a novel predictor for failed retrograde ureteric stent placement. Canadian Urological Association Journal, 18(10), 349–52. https://doi.org/10.5489/cuaj.8845

Numéro

Rubrique

Original Research