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Obesity surgery may increase risk of kidney stones

A new study suggests that patients who undergo gastric bypass surgery may face an increased risk of kidney stones after their operation.

Scientists carried out a study of 24 morbidly obese adults who underwent obesity surgery.

The patients opted for a type of gastric bypass surgery called roux-en-y gastric bypass (RYGB), in which part of the stomach is stapled together to form a small pouch and a Y-shaped section of the small intestine is attached to the pouch, allowing food to bypass part of the intestine.

Researchers found that patients became more likely to develop kidney stones within just a few months of their obesity surgery.

Dr Manoj Monga, professor of urologic surgery at the University of Minnesota, Minneapolis, said that gastric bypass surgery "is associated with an increased risk of forming kidney stones as early as three months post-operation".

He noted: "Although this study demonstrates that there is a higher risk for developing kidney stones, it is important to weigh the risk against the many benefits that RYGB has for the morbidly obese patient, including decreasing cardiac morbidity and improving diabetes."

The findings are published in the Journal of the American College of Surgeons.

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Obesity surgery may increase risk of kidney stones
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