Abstract

Objective To evaluate the efficacy and safety of flexible ureteroscopy (FURS) for the treatment of renal lower pole calculi in obese patients. Methods From October 2012 to May 2017, a total number of 184 obese patients(body mass index, BMI≥30) with lower pole kidney stones were randomly divided into two groups, FURS group(n=65) and percutaneous nephrolithotomy(PNL) group (n=119). The mean stone size was (15.8±5.7)mm in FURS group and (18.6±4.9)mm in PNL group. Results All of the D-J stents were removed 4 weeks after operation in both groups, and ultrasonic or X-Ray 87.69% vs. 89.92% (P>0.05). Residual stones were found in 8 vs. 12 patients in each group, and all disappeared after active lithagogue treatment with external physical vibration lithecbole (EPVL). Complications in FURS group were lower than PNL group , including fever(1 vs. 2), pain(8 vs. 23), perirenal hematoma(none vs. 1) , the visual analogue scale/score(3.3±1.1) vs.(5.6±0.9) and hospital stay(3.7±0.6) d vs. (5.4±0.8 ) d was also lower(P<0.05). Conclusions FURS is a safe and efficient option for renal lower pole calculi in obese patients. Key words: Kidney Calculi; Nephrostomy, Percutaneous; Ureteroscopes; Obesity

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