If you require a capsule endoscopy, you’ll be asked not to eat anything and to drink only clear liquids the day before. This helps make sure your digestive system is clear. You might be asked not to take certain medications before the test and to avoid intense activity afterward.
During the procedure, your doctor places adhesive patches with electrodes on the skin of your abdomen. The electrodes send signals to a transmitter worn around your waist. Thin wires connect the electrodes to the transmitter. You swallow a capsule about the size of a large vitamin, which is specially coated so it’s easier to swallow.
If you’re having capsule endoscopy to check your esophagus, you’ll swallow the capsule while lying down. You’ll be gradually raised to a sitting position over 20 minutes or so. Then the test is done and you can go home.
If you’re having capsule endoscopy to check your small intestine, you’ll swallow the capsule and go home, wearing the transmitter around your waist. Usually, you’ll return the next day. Your doctor connects the transmitter to a computer and looks at video images of your digestive system to check for problems.