Does Previous Open Nephrolithotomy Affect the Success and Complications Rate of Percutaneous Nephrolithotomy?

Objective\udTo investigate the differences between the results of percutaneous nephrolithotomy (PCNL) for stone relapse in patients who previously underwent open surgery for renal stones and those in patients undergoing surgery for the first time.\udMaterials and Methods\udPatients who underwent PCNL for renal stones bigger than 2 cm between the years 2009 and 2012 were evaluated. Stone size, length of the procedure, number of access, period of catheterization, length of hospital stay, complications, and stone-free rates were evaluated.\udResults\udA total of 64 patients included in the study. Twenty-seven had previously undergone open surgery for renal stones (group 1) and 37 underwent surgery for the first time (group 2). There was no significant difference between the groups in age and stone size. Seven (25.9%) patients in group 1 and 6 (18.2%) patients in group 2 had more than one access (p=0.628). In group 1; 2 patients (7.4%) had grade 2 and 3 patients (11.1%) had grade 3 complications. In group 2; 4 patients (10.8%) had grade 2 and 7 patients (18.9%) had grade 3 complications. The stone-free rate was 14 (51.8%) in group 1 and 23 (62.2%) in group 2. The rate of clinically insignificant residual stones was 8 (29.6%) in group 1 and 5 (13.5%) in group 2. The success rate of PCNL procedure in group 1 was 81.5% and 75.7% in group 2 (p=0.161).\udConclusion\udPCNL is a good option for patients who had a previous open surgery for renal stones as well as for patients undergoing surgery for the first time