experience persistent symptoms (nausea, vomiting, early satiety, weight loss
) for longer than three months; and have no obstruction, metabolic disease, systemic illness, surgery, or use of antimotility medication. Viral serology, can be used too, if it is available.
Gastric Emptying Assessment
Gastric scintigraphy is the best method for diagnosing delayed gastric emptying. A 4-hour test which has the patient eat low-fat egg meals (egg substitute) is standard.