For single renal or upper ureteral stones less than 2 cm. a significantly better 3-month stone-free rate is achieved with the Doli 50 lithotriptor when general anesthesia is used instead of intravenous sedation.
On the Doli 50 machine stone size rather than caliceal anatomy is predictive of treatment outcome. Initial treatment failures with this machine should be managed by alternative endoscopic procedures if necessary rather than by repeat shock wave lithotripsy.
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