Ureteric stents compromise stone clearance after shockwave lithotripsy for ureteric stones: results of a matched-pair analysis

BJU International
Athanasios N Argyropoulos, David A Tolley

Abstract

To identify the effect of the presence of a ureteric stent on the outcome of extracorporeal shockwave lithotripsy (ESWL), by comparing patients with ureteric stones with matched-pair analysis. Patients undergoing ESWL with the Sonolith Vision lithotripter (Technomed Medical Systems, Vaulx-en-Velin, France) were identified from our prospectively maintained database. Only adult patients with a solitary, radio-opaque, previously untreated ureteric stone were considered for further analysis. A follow-up of >or=3 months with a plain abdominal film was used to identify residual fragments. Patients were exactly matched for gender, side, location in the ureter and size (in two dimensions, within +/-2 mm). If both diameters could not be matched exactly, the size was extended to +/-1 mm and then to +/-2 mm of both diameters. An effort was finally made to match patients by age. The treatment outcome in terms of stone-free rates was assessed and compared using McNemar's test. In all, 45 patients with a ureteric stent in place during ESWL were identified. The only patient who could not be adequately matched was a 40-year-old man with an 8 x 3 mm stone in the upper ureter. The best/closest match for age was selected. Most stones were in the ...Continue Reading

References

Mar 1, 1990·The Journal of Urology·J L Pryor, A D Jenkins
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Nov 20, 2001·European Urology·H G TiseliusUNKNOWN Working Party on Lithiasis, European Association of Urology
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Feb 16, 2006·Current Opinion in Urology·Fernando J Kim, Kevin R Rice
May 15, 2007·European Urology·Athanasios N Argyropoulos, David A Tolley
Sep 14, 2007·BJU International·Michael S NomikosDavid A Tolley

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Citations

Aug 18, 2009·The Journal of Urology·Christian SeitzMaximilian Burger
Nov 10, 2009·Current Opinion in Urology·Athanasios N Argyropoulos, David A Tolley
Jul 16, 2010·Annals of the Royal College of Surgeons of England·S PhippsF X Keeley

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