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"Recent studies have demonstrated that mineral and electrolyte abnormalities develop in patients who undergo bariatric surgery. While it is known that these abnormalities are a risk factor for urolithiasis, the prevalence of stone disease after bariatric surgery is unknown," scientists writing in the Journal of Urology report (see also Bariatrics).
"We evaluated the likelihood of being diagnosed with or treated for an upper urinary tract calculus following Roux-en-Y gastric bypass surgery. We identified 4,639 patients who underwent Roux-en-Y gastric bypass surgery and a control group of 4,639 obese patients who did not have surgery in a national private insurance claims database in a 5-year period (2002 to 2006). All patients had at least 3 years of continuous claims data. Our 2 primary outcomes were the diagnosis and the surgical treatment of a urinary calculus. After Roux-en-Y gastric bypass surgery 7.65% (355 of 4,639) of patients were diagnosed with urolithiasis compared to 4.63% (215 of 4,639) of obese patients in the control group (p
The researchers concluded: "Future studies are needed to evaluate preventive measures in the high risk population."
Matlaga and colleagues published their study in the Journal of Urology (Effect of Gastric Bypass Surgery on Kidney Stone Disease. Journal of Urology, 2009;181(6):2573-2577).
Additional information can be obtained by contacting B.R. Matlaga, Johns ...
Source: HighBeam Research, Research findings from Johns Hopkins University update understanding...