The “O” Sign, a Simple and Helpful Tool in the Diagnosis of Laparoscopic Adjustable Gastric Band Slippage

OBJECTIVE. The purpose of this article is to describe a sign on radiography for gastric band slippage, a complication of adjustable gastric banding surgery, and to emphasize the importance of this finding to radiologists and clinicians.MATERIALS AND METHODS. We reviewed the radiologic findings in 55 consecutive patients who underwent laparoscopic gastric banding. Between January 2007 and September 2008, gastric band slippage was diagnosed in four patients at our institution. All patients underwent an upper gastrointestinal examination at the time of presentation. On the basis of either radiographic findings or clinical presentation, all patients underwent exploratory surgery.RESULTS. In all four patients with surgically proven gastric band slippage, the initial abdominal radiograph showed an O-shaped configuration of the gastric band, which we have termed the “O” sign. Baseline upper gastrointestinal examinations were available for comparison in all patients. In each case, the O-shaped configuration of th...