Böbrek Taşı Nedeniyle Retrograd İntrarenal Cerrahi Yapılan Hastalarda Pasif Üreteral Dilatasyonun Üreteral Darlık İnsidansına Etkisi: Retrospektif Gözlemsel Çalışma

Abstract

Objective: To investigate the effect of passive dilatation (PD) on ureteral stricture (US) rates after retrograde intrarenal surgery (RIRS), and to determine the factors that predict US. Material and Methods: Patients who underwent RIRS (Group 1) and patients who could undergo RIRS after PD (Group 2) were compared in terms of demographic data, clinical characteristics, perioperative and postoperative complications. The primary end point was US rate at postoperative 1 year. The predictive factors for US was assessed with logistic regression analysis. Results: US was determined in 12 (4.61%) and in 1 (0.67%) patients for Group 1 and 2, respectively. When the study population was grouped according to the US, the rate of PD was observed to be lower (p=0.037), and stone volume, surgical duration were observed to be higher in the US group, statistically (p<0.001 and p=0.034 respectively). The rate of PD, Stone volume and surgical duration were detected as predictive factors for US. The cut-off value of stone volume for US was 2,408 mm3 in receiver- operating characteristic curve analysis. Above the cut-off value, it was observed that the surgical duration was higher in cases with US, and there was no difference between the groups in terms of PD statistically. Conclusion: We conclude that PD is protective against US. However it was observed that PD was not protective in patients with stone volume higher than the cut off value, and the most important risk factor for US was found to be prolonged surgical duration.