Comparison of Preoperative Urine Culture and Intraoperative Renal Pelvis Culture in Patients Who Underwent Flexible Ureterorenoscopy

Urine culture was recommended before any type of stone surgeries. The urine culture generally collected from bladder and infectious complications could occurs even the bladder urine culture was negative. The studies suggested that bladder urine culture do not correlate with pelvic urine culture and pelvic urine culture were better predictors for infectious complications and sepsis. However, the pelvic urine culture could not collect routinely. Our study demonstrated that preoperative bladder urine culture may not shows pelvic urine culture colonization and in patients with preoperative hydronephrosis and low tomographic pelvic urine density prone to positive pelvic urine culture. Our study suggest that preoperative patients who pelvic density. Abstract Objective: There is no correlation between the preoperative bladder urine culture (PBUC) sensitivity test and the results of the renal pelvic urine culture (RPUC) test. Materials and Methods: A total of 129 patients who underwent f-URS included the study. Preoperatively, PBUC was collected in all cases, and RPUC was taken when starting the surgery. Results: In PBUC, there was growth in 25 (19.4%) patients and in RPUC, there were only in 35 (27.1%) cases. Preoperative tomographic urine density at the renal pelvis [odds ratio (OR): 0.848, p<0.001], grade ≥2 hydronephrosis (OR: 18.970, p=0.001), and lower calyceal stone location (OR: 0.033, p=0.017) were determined as independent predictive factors for RPUC growth. The ability of tomographic urine density to foresee positive RPUC positivity was determined to be 0.858 (0.780-0.936). The tomographic urine density threshold for RPUC positivity prediction was 4.5, with 80% sensitivity and 77.7% specificity. Conclusion: PBUCs do not necessarily mean accurate colonization. urine for managing postoperative infectious complications. Patients that have preoperative hydronephrosis and nominal tomographic urine density could develop RPUC even if the preoperative bladder urine samples are negative.