TY  - JOUR
TI  - Prediction of stone-free status after single-session retrograde intrarenal surgery for renal stones
AB  - Objective: To determine the possible factors effecting stone-free status (SFS) after single-session retrogradeintrarenal surgery (RIRS) for renal stones.Material and methods: We retrospectively analyzed the charts of 100 consecutive patients who underwentRIRS. Unilateral procedures performed for single renal stones were included in the study. The studiedparameters included patient demographics, stone characteristics (size, volume, location and attenuation according to Hounsfield unit [HU]), operation time, presence of preoperative double-J stent (DJS), use ofureteral access sheath (UAS) and SFS.Results: The study population consisted of 100 patients where 43 of them were stone free and remaining 57had residual stones. The mean age of the patients was 47.2±13.4 years. The mean stone size (largest dimension), stone attenuation and stone volume were 14.8±5.8 mm, 1010±416 HU and 937±929 mm3, respectively.The mean operative time was 60.8±24.2 minutes. Mean stone size, volume and HU were higher in the RSgroup compared to SF group but without any statistically significant difference, 15.2±6.1 vs. 14.2±5.3 mm,1056±1037 mm3 vs. 780±745 mm3 and 1061±374 HU vs. 942±462 HU, respectively (p=0.490, p=0.135 andp=0.226). In multivariate regression analysis stone location and UAS use were found to be the significantpredictors of SFS. Patients with lower pole stones are 2.25 times likely to have residual stones after RIRScompared to patient’s having stones at other localizations (p<0.001).Conclusion: Stone volume could be a more reliable parameter than stone size in predicting RIRS success.Lower pole stone location and UAS use could be considered the most significant predictors of SFS aftersingle session RIRS for single renal stones.
AU  - Karaaslan, Mustafa
AU  - YILMAZ, MEHMET
AU  - IŞIKAY, Levent
AU  - Tonyali, Senol
AU  - CEYLAN, Cavit
DO  - 10.5152/tud.2018.88615
PY  - 2018
JO  - Turkish Journal of Urology
VL  - 44
IS  - 6
SN  - 2149-3235
SP  - 473
EP  - 477
DB  - TRDizin
UR  - http://search/yayin/detay/303431
ER  -