320 Evaluation of a novel fascial dilator modified with scale marker in PCNL for reduction of x-ray exposure: A randomized clinical study

Abstract

0,8 mm); mean fluoroscopy time during URS was 116 seconds (s) (group 1), 172 s (group 2), 78 s (group 3), 83 s (group 4), observing less time of radiation exposure (p 0,05) for distal (pelvic and prevesical) than proximal (pielo-ureteral and lumbar) stones. This result was confirmed after correction for stone size. In addition, the absorbed dose was significantly lower (p 0,05) in groups 3 and 4 [mean for groups 1-4 expressed in milliGray (mGy): 1) 8,915; 2) 9,451; 3) 4,878; 4) 4,744]. 56 patients (88%) were evaluated 2 months after treatment with KUB and abdominal US, 8 patients (12%) required a CT scan to achieve the diagnosis. Mean measured exposure radiation was: 19mSv (group 1), 21msV (group 2), 15mSv (group 3), 15 mSv (group 4). CONCLUSIONS: The total radiation received by the studied population was lower than 50 mSv, the recommended dose limit in a year for workers according to International Commission on Radiological Protection. This is the first report concerning the measurement of total amount of radiation a patient submitted to URS for ureteral stone receives in his clinical fate. The use of fluoroscopy during endourological procedures increases patient’s radiation exposure and adds to all radiological diagnostic examinations. It’s critical that endourologist is sensitised to this problem in order to minimize the employ of ionising radiation during endourological treatment.