A gastric emptying scan is a specialised diagnostic test. Doctors observe how efficiently your stomach processes food and moves it into your small intestine. This nuclear medicine procedure uses a tiny amount of radioactive material mixed safely into a meal you eat during the test.
You digest this meal. A special camera takes images of your stomach at set intervals, creating a clear timeline showing exactly how your digestive system functions. The radioactive tracer is completely safe, using minimal radiation, often less than a standard X-ray.
The procedure is entirely painless. You won’t feel the tracer working, and there are no needles during the imaging process itself.
Why Do Doctors Recommend This Test?
Your doctor might suggest a gastric emptying scan if you experience persistent digestive symptoms that other investigations haven’t explained. Common complaints include chronic nausea, recurring vomiting, uncomfortable bloating after meals, or feeling unusually full after eating only small amounts of food.
Doctors look for gastroparesis with this test. This disorder causes the stomach to take too long to empty its contents, which can impact your quality of life if left undiagnosed. The scan also identifies dumping syndrome, where the stomach empties too quickly into the small intestine.
This typically occurs after certain types of stomach surgery. Doctors order this test when blood work or endoscopies haven’t provided transparent answers, offering unique insights into your stomach’s actual function rather than just its structure.
What Happens During the Procedure?
The test begins with a light meal. You eat scrambled eggs containing the radioactive tracer, designed to be easily digestible.
After eating, you lie on an examination table. A gamma camera positioned above your abdomen takes pictures, captured immediately after your meal and then at precise intervals over the next two to four hours. Between imaging sessions, you can sit up or relax in a waiting area.
You cannot eat during this period, as these activities would interfere with accurate results. The entire process is comfortable, requiring you to remain still only during the brief imaging periods.
Preparing for Your Scan
Proper preparation ensures the most accurate results from your gastric emptying scan. You’ll need to fast for four to six hours before your appointment, and your medical team will provide detailed instructions based on your scheduled time.
Inform your doctor about all medications you’re taking. Some medicines may need to be temporarily stopped before the test. Wear loose-fitting clothing without metal fastenings, and plan your day accordingly, as the complete procedure typically requires three to four hours from start to finish.
Reading Your Results
Your results show the percentage of food remaining in your stomach at each time point. Normal stomach emptying typically clears about half the meal within two to three hours, with most food gone by four hours.
If your stomach retains more food than expected, this suggests delayed emptying. When food moves through too quickly, this indicates rapid gastric emptying.
Your doctor will review these findings during a follow-up appointment, explaining what they mean for your particular situation. The results directly inform treatment decisions, whether that involves medication or dietary changes tailored to your condition. Schedule a discussion with your medical team once you receive your results to explore the next steps.
By Business Scoops.