[Single center experience with Siemens Lithostar Modularis for treatment of 1500 solitiary urinary stones]

the aim of the study was to evaluate the results of extracorporeal shock wave lithotripsy (ESWL) treatment with Siemens Lithostar Modularis in urinary stones.

from May 2000 until September 2006, 1500 patients, 62% men and 38% women, ages 15 to 89 years (mean age 53), underwent ESWL as treatment of urinary stones at the Lithotripsy Unit of León. Data were analized retrospectively. More than half (56%) had left urinary stones. The most frequent ureteral localization (55%) was proximal (420 patients), and the most frecuent renal was renal pelvis (345 patients). The mean stone diameter was 1.3 cm. (1.01 ureteral and 1.7 renal). All patients received ESWL-session under i.v. analgesia with alfentanil and midazolam.

Mean number of sessions per lithiasis was 1.5 (ureteral stones 1.4 and renal stones 1.7). The retreatment rate was 33%, 28% for ureteral stones and 39% for renal stones with a cumulative success of 86% with two sessions. 22% of the patients required auxiliary manouvers, 24% of the patients with ureteral stones and 18% of the renal stones patients. Stone free rate was 91%, 97% in ureteral stones and 82% in renal stones.

treatment of urinary stones with Siemens Lithostar Modularis showed good results, with a stone free patient rate of more than 90%, although 33% of the patients need multiple ESWL treatment sessions and 20% of the patient required auxiliary procedures.