Efficacy of commercialised extracorporeal shock wave lithotripsy service: a review of 589 renal stonesReport as inadecuate




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BMC Urology

, 17:59

Endourology and technology

Abstract

BackgroundExtracorporeal shockwave lithotripsy ESWL is the management of choice for renal stones 20 mm or smaller, with a stone clearance rate of up to 89%. The purpose of the present is to investigate the efficacy of a commercialised ESWL service, being performed as an outsourced treatment using a mobile lithotripsy system on an outpatient basis. Furthermore, the study aims to evaluate the risk of needing treatment with an internal ureteral double-J stent JJ after ESWL treatment.

MethodsDuring an eight-year period, 461 patients with a total of 589 renal stones were treated using a mobile lithotripsy system at a single Danish institution. A commercial company performed all treatments using a Storz Modulith SLK® system. Each stone was prospectively registered according to size, intra renal location and the presence of a JJ at the time of treatment. The number of required ESWL treatments and auxiliary procedures were retrospectively evaluated.

ResultsThe success rate after the initial ESWL procedure was 69%, which increased to an overall success rate of 93% after repeated treatment. A negative correlation was found between stone size and the overall success rate r = −0.2, p < 0.01. The upper calyx was associated with a significantly better success rate, but otherwise intra renal stone location was not predictive for treatment success. A total of 17 patients 2.9% required treatment with a JJ after the ESWL procedure. No significant difference was observed between the stone size or intra renal location and the risk of needing treatment with JJ after ESWL.

ConclusionsCommercialised ESWL treatment can achieve an overall success rate of more than 90% using a mobile lithotripsy system. As expected, an inverse relation between stone size and success rate was found. Patients who do not require treatment with a JJ prior to ESWL will only rarely need treatment with a JJ after ESWL, irrespective of stone size and intra renal stone location.

KeywordsUrinary calculi Eswl Lithotripsy Mobile Shockwave Stones Ureteral stent AbbreviationsCTComputed tomography

EAUEuropean Association of Urology

ESWLExtracorporeal shock wave lithotripsy

JJInternal ureteral double-J stent

PNLPercutaneous nephrolithotomy

RIRSRetrograde intrarenal surgery

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Author: Tommy Kjærgaard Nielsen - Jørgen Bjerggaard Jensen

Source: https://link.springer.com/







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