Verified answer

An endoscopy can help to rule IN gastroparesis - i.e. if you've fasted for the appropriate amount of time and still have food material in your stomach, or if your stomach motility is less than expected, but it cannot rule gastroparesis out. To test definitively for gastroparesis, you need to have a gastric emptying study done. This requires you to eat a certain food - usually porridge or scrambled eggs containing a radioactive tracer. You then lie under a big scanner and they monitor how long it takes for the food to leave your stomach.