It’s a stomach-turning idea but an alternative to gastric bypass surgery could soon enable overweight people to 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 gizmo’s developer, Aspire Bariatrics of Philadelphia, Pennsylvania, is now seeking a patent. In clinical trials the system has helped people lose an average of 20 kg (45 lbs) in a year; some nearly twice that. (“Errrrp, I’m so full. Excuse me while I go turn on my tap and purge. Are you up for dessert after?”)
– NewScientist.com