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Objectives
To compare the efficacy and safety of shockwave lithotripsy (SWL) using a narrow focus or wide focus for renal stones.
Patients and Methods
A double‐blind randomised trial included adult patients with a solitary radio‐opaque renal pelvic stone of 1–2 cm. Patients were randomised into two groups: narrow‐focus (2 mm) SWL and wide‐focus (8 mm) SWL. The stone‐free rate (SFR) and presence...