If s a stomach-turning idea - but an alternative to gastric bypass surgery, detailed in a US patent application, could let overweight people eat and drink as much as they want and still lose weight. The idea is to surgically install a valve into a patient's stomach and through their abdominal wall, This allows them to pump out some of their food 20 minutes after they eat. The system, built by Aspire Bariatrics of Philadelphia, Pennsylvania, is now in clinical trials. It has helped people lose an average of 20 kilograms in a year, and some nearly twice that.
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