2018 Volume 31 Issue 2 Pages 234-238
Objective : We performed ESWL for renal stones exceeding 20 mm using Dornier Delta II Far Sight, and report the results of treatment.
Method : From January 2011 to March 2017, 58 patients with renal stones (including staghorn calculus) exceeding 20 mm, which necessitated ESWL as the initial treatment, were targeted, comprising 41 males and 17 females, with a median age 58 of years (33 to 79). The long diameter was 23 mm (21 to 58), the short diameter was 16 mm (6 to 40) at the median value, and 7 cases were staghorn calculus. In 12 cases, ureteral stent was placed before ESWL administration.
Results : The average number of ESWL enrollment was 5.1 (1 to 16), the calculus disappearance rate was 37.9%, and the residual stone of 4 mm or less was 34.5%. According to the “new criteria for urinary calculi” proposed by Yamaguchi et al., 3 cases were less than 1 cm3, 9 cases were 1 cm3 or more and less than 2 cm3, 19 cases were 2 cm3 or more and less than 5 cm3, and 20 cases were 5 cm3 or more. As a result of ESWL treatment, 21 cases were without residual stone and 19 cases were less than 5% residual stone.
Conclusion : When ESWL is performed for renal stones exceeding 20 mm using Dornier Delta II Far Sight, sufficient informed consent on high residual stone ratio is considered necessary.
