Sleeve Gastrectomy and One-Anastomosis (Mini) Gastric Bypass surgery both have the recognised potential of exposing the oesophagus to bile and/ or acid from reflux. Not everybody notices the reflux or will experience symptoms.
There are studies that have found patients after this surgery to have developed a condition known as
Barrett's metaplasia of the oesophagus which is a change that occurs to the lining to make it more resistant to the chemical damage of bile and acid. Unfortunately, this change also increases the risk of transformation into a form of oesophageal cancer. This is the reason why you would have had a gastroscopy done prior to your surgery, to ensure you did not have this before, and now it requires ongoing surveillance.
The current recommendedations are for a gastroscopy to be performed 2-3 years after the initial surgery.
A decision will be made about ongoing surveillance based on the findings of this surveillance endoscopy.
Gastric calibration rings are foreign objects that have the risk of being able to erode or cause other side-effects. The Mid-cal ring manufacturer recommends surveillance on the device.