After performing a full physical exam and taking your medical history, your doctor may order several blood tests to check blood counts and chemical and electrolyte levels. To rule out an obstruction or other conditions, the doctor may perform the following tests:
After giving you a sedative to help you become drowsy, the doctor passes a long, thin tube called an endoscope through your mouth and gently guides it down the throat, also called the esophagus, into the stomach. Through the endoscope, the doctor can look at the lining of the stomach to check for any abnormalities.
To rule out gallbladder disease and pancreatitis as sources of the problem, you may have an ultrasound test, which uses harmless sound waves to outline and define the shape of the gallbladder and pancreas.
Barium x ray
After fasting for 12 hours, you will drink a thick liquid called barium, which coats the stomach, making it show up on the x ray. If you have diabetes, your doctor may have special instructions about fasting. Normally, the stomach will be empty of all food after 12 hours of fasting. Gastroparesis is likely if the x ray shows food in the stomach. Because a person with gastroparesis can sometimes have normal emptying, the doctor may repeat the test another day if gastroparesis is suspected.
Once other causes have been ruled out, the doctor will perform one of the following gastric emptying tests to confirm a diagnosis of gastroparesis.
Gastric emptying scintigraphy
This test involves eating a bland meal, such as eggs or egg substitute, that contains a small amount of a radioactive substance, called radioisotope, that shows up on scans. The dose of radiation from the radioisotope is not dangerous. The scan measures the rate of gastric emptying at 1, 2, 3, and 4 hours. When more than 10 percent of the meal is still in the stomach at 4 hours, the diagnosis of gastroparesis is confirmed.
After ingestion of a meal containing a small amount of isotope, breath samples are taken to measure the presence of the isotope in carbon dioxide, which is expelled when a person exhales. The results reveal how fast the stomach is emptying.
Approved by the U.S. Food and Drug Administration (FDA) in 2006, the SmartPill is a small device in capsule form that can be swallowed.The device then moves through the digestive tract and collects information about its progress that is sent to a cell phone-sized receiver worn around your waist or neck. When the capsule is passed from the body with the stool in a couple of days, you take the receiver back to the doctor, who enters the information into a computer.
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