The effects of time period after open nephrolithotomy surgery and ESWL to the success rate of percutaneous nephrolithotomy

Surgical approach to kidney stones dates back to old times. Treatment choices increased in parallel with technological advancements in years. PNL is a safe and effective method for kidney stones. Recently, PNL is the first choice of treatment for kidney stones that is larger than 2 cm and after the failure of ESWL treatment. There are many reasons that affects the success of PNL operation. In our study, we aimed to identify the contribution of history of kidney stone in the same kidney and the time elapsed after ESWL to the success rates of PNL operation. We inspected 464 patients that has been treated with PNL in Bülent Ecevit Üniversitesi Faculty of Medicine, Department of Urology between June,2002 and June 2012 retrospectively. All patients? operation position, technique and anesthesia protocol was similar. While 114 (%24,5) patients in this study had ESWL before PNL due to their kidney stones, 350 (%75,5) patients didn?t experience ESWL procedure. 45 patients (%9,7) had open kidney stone surgery history in the same side, while 419 (%90,3) patients didn?t have any open kidney stone surgery history.In order to analyze the effect of time interval between ESWL and PNL operation, groups were categorized into 4 subgroups: 0-1 month, 1-2 months, 2-3 months and 3 or more months. In groups that have similar age, gender and stone load there wasn?t a statistical significance for number of access, hospitalization period, nephrostomy removal time, residual stone and blood transfusion. In open kidney stone surgery group percutaneous intervention count, hospitalization period and nephrostomy removal time were found statistically significant. (p values p:0,008, p:0,006, p:0,03) respectively. As a result, in our study we believe PNL operation is reliable and effective regardless of time after open kidney stone surgery and ESWL