Test Overview An upper GI series looks at the upper and middle sections of the gastrointestinal tract barium contrast material fluoroscopy X-ray
Before the test, you drink a mix of barium (barium contrast material) and water. The barium is often combined with gas-making crystals. Your doctor watches the barium move through your esophagus, stomach, and the first part of the small intestine (duodenum
A small bowel follow-through may be done right away after this test to look at the rest of the small intestine. If just the throat and esophagus are looked at, it's called an esophagram (or barium swallow)
Upper endoscopy is done instead of an upper GI series in certain cases. Endoscopy uses a thin, flexible tube (endoscope) to look at the lining of the esophagus, stomach, and upper small intestine (duodenum).
Why It Is Done
An upper GI series
Find the cause of gastrointestinal symptoms, such as trouble swallowing, vomiting, burping up food, belly pain (including a burning or gnawing pain in the centre of the stomach), or indigestion. Find narrow spots (strictures) in the upper intestinal tract, ulcers polyps pyloric stenosis Find inflamed areas of the intestine, malabsorption syndrome, or problems with the squeezing motion that moves food through the intestines (motility disorders). Find swallowed objects. Generally, an upper GI series is not used if you do not have symptoms of a gastrointestinal problem. An upper GI series is done most often for people who have:
A hard time swallowing. A possible blocked intestine (obstruction). Belly pain that is relieved or gets worse while eating. Severe heartburn or heartburn that occurs often. How To Prepare
You may be asked to eat a low-fibre diet for 2 or 3 days before the test. You may also be asked to stop eating for 12 hours before the test. Your doctor will tell you if you need to stop taking certain medicines before the test.
The evening before the test, you may be asked to take a laxative to help clean out your intestines. If your stomach can't empty well on its own, you may have a special tube put through your nose and down into your stomach just before the test begins. A gentle suction on the tube will drain the stomach contents.
If you are having the small bowel follow-through after the upper GI series, you'll need to wait between X-rays. The entire small bowel follow-through examination takes up to 6 hours, so bring along a book to read or some other quiet activity.
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How It Is Done
An upper GI series is usually done in a clinic or the X-ray department of a hospital. You don't need to stay overnight in the hospital.
Before the test You will need to take off your clothes and put on a hospital gown. You will need to take out any dentures and take off any jewellery. You may not smoke or chew gum during the test, since the stomach will respond by making more gastric juices. This will slow the movement of the barium through the intestines.
You will lie on your back on an X-ray table. The table is tilted to bring you to an upright position with the X-ray machine in front of you. Straps may be used to keep you safely on the table. The technologist will make sure you are comfortable during changes in table position.
During the test You will have one X-ray taken before you drink the barium mix 250 mL (1 cup) to 750 mL (3 cups) of the barium mixture.
The radiologist watches the barium pass through your gastrointestinal tract
If you are having an air-contrast study, you will sip the barium liquid through a straw with a hole in it or take pills that make gas in your stomach. The air or gas that you take in helps show the lining of the stomach and intestines in greater detail.
If you are also having a small bowel study, the radiologist watches as the barium passes through your small intestine into your large intestine. X-ray pictures are taken every 30 minutes.
After the test You may be given a laxative or enema
How long the test takes The test will take about 30 to 40 minutes. If you are also having a small bowel study, the test will take 2 to 6 hours.
How It Feels
The barium liquid is thick and chalky. Some people find it hard to swallow. A sweet flavour, like chocolate or strawberry, is used to make it easier to drink. Some people don't like it when the X-ray table tilts. You may find that pressure on your belly is uncomfortable. After the test, many people feel bloated and a little nauseated.
Risks
Barium doesn't move into the blood, so allergic reactions
Some people gag while drinking the barium fluid. In rare cases, a person may choke and inhale (aspirate) some of the liquid into the lungs.
There is a small chance that the barium will block the intestine or leak into the belly through a perforated ulcer. A special type of contrast material (Gastrografin) can be used if you have a blockage or an ulcer.
There is always a small chance of damage to cells or tissue from being exposed to any radiation, even the low level of radiation used for this test.
Results
Results are usually ready in 1 to 3 days.
Upper gastrointestinal (GI) series Normal:
The esophagus, stomach, and small intestine all look normal.
Abnormal:
A narrowing (stricture), inflammation, a mass, a hiatal hernia
The upper GI series may show a stomach (gastric) or intestinal (duodenal) ulcer pyloric stenosis
The small bowel follow-through may show inflammation or changes in the lining that may explain poor absorption of food. This may be caused by Crohn's disease celiac disease
Related Information
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Current as of: July 31, 2024
