Low Dose Fluoroscopy During Ureteroscopy Does Not Compromise Surgical Outcomes.

To evaluate whether reducing the dose of fluoroscopy to ¼ of standard dose during unilateral ureteroscopy for ureteral stone treatment would impact in a reduction of total radiation emitted and whether this strategy would impact operation time, stone-free rate, and complication rate. From August 2016 to August 2017, patients over 18 years submitted to ureteroscopy for ureteral stone between 5 and 20 mm were prospectively randomized for ¼ dose reduction or standard dose fluoroscopy. Patients with abnormal urinary anatomy such as horseshoe kidney, pelvic kidney, or duplex system were excluded from the study. Ninety-four patients were enrolled. The fluoroscopic dose reduction strategy to ¼ of the standard dose was able to significantly reduce the cumulative radiation emitted by C-arm fluoroscopy and the dose area product (3.6 ± 4.5 mGy 16.2 ± 19.3 mGy,  = 0.0001 and 0.23 ± 0.52 mcGycm 1.15 ± 2.74 mcGycm,  = 0.02, respectively). Fluoroscopy time was similar between groups (74.5 ± 84.8 seconds 88.3 ± 90 seconds,  = 0.44). There was no need to increase the fluoroscopy dose during any of the procedures. Surgical outcomes were not affected by fluoroscopic dose reduction strategy. Low dose fluoroscopy reduces the emitted radiation during ureteroscopy without compromising surgical outcomes.