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The association between the size of residual stone fragments detected by abdominal x-ray after ureteroscopy and laser lithotripsy, and the risk of repeat surgical intervention depends on patient body mass index. Nonobese patients with residual stone fragments of any size are at increased risk for repeat intervention compared to those with a negative abdominal x-ray. The predictive value of abdominal x-ray after ureteroscopy and laser lithotripsy is limited in obese patients.
Iremashvili et al. (Fri,) studied this question.