To analyse the efficiency of extracorporeal shockwave lithotripsy ( ESWL ) vs retrograde ureteroscopy and holmium : YAG laser lithotripsy , as ESWL is successful in 67-90 % of cases but endoscopic lithotripsy with pneumatic lithotrites or lasers is successful in 90-96 % of distal ureteric calculi , and holmium : YAG lithotripsy is effective in proximal ureteric calculi .
