Understanding Capsule Endoscopy
-This information was developed by the Publications Committee of the American Society for Gastrointestinal Endoscopy (ASGE). For more information about ASGE, visit www.asge.org.
-This information is intended only to provide general guidance. It does not provide definitive medical advice. It is important that you consult your doctor about your specific condition.
Capsule endoscopy takes approximately eight hours. Normal daily activities are largely unaffected by capsule endoscopy, unlike many endoscopic procedures that require sedation. When you return to the doctor’s office, the data recorder, worn on your belt during the procedure, is removed so that images of your small bowel can be put on a computer screen for physician review.
How should I prepare for the procedure?
An empty stomach allows for the best and safest examination, so you should have nothing to eat or drink, including water, for approximately twelve hours before the examination. Your doctor will tell you when to start fasting. Tell your doctor in advance about any medications you take including iron, aspirin, bismuth subsalicylate products and other over-the-counter medications. You might need to adjust your usual dose prior to the examination. Discuss any allergies to medications as well as medical conditions, such as swallowing disorders and heart or lung disease. Tell your doctor of the presence of a pacemaker or defibrillator, previous abdominal surgery, or previous history of bowel obstructions, inflammatory bowel disease or adhesions. Your doctor may ask you to do a bowel prep/cleansing prior to the examination.
The small intestine can be the site of several gastrointestinal disorders, including bleeding, polyps, inflammatory bowel disease, ulcers, and tumors. Capsule endoscopy allows for examination of the small intestine, which cannot be easily reached by traditional methods of endoscopy.
What can I expect during capsule endoscopy?
Your doctor will prepare you for the examination by applying a sensor device to your abdomen with adhesive sleeves (similar to tape). The pill-sized capsule endoscope is swallowed and passes naturally through your digestive tract while transmitting video images to a data recorder worn on your belt for approximately eight hours. At the end of the procedure you will return to the office and the data recorder is removed so that images of your small bowel can be put on a computer screen for physician review.
Most patients consider the test comfortable. The capsule endoscope is about the size of a large pill. After ingesting the capsule and until it is excreted, you should not be near an MRI device or schedule an MRI examination.
What happens after capsule endoscopy?
You will be able to drink clear liquids after two hours and eat a light meal after four hours following the capsule ingestion, unless your doctor instructs you otherwise. You will have to avoid vigorous physical activity such as running or jumping during the study.
Your doctor generally can tell you the test results within the week following the procedure; however, the results of some tests might take longer.
What are the possible complications of capsule endoscopy?
Although complications can occur, they are generally rare when doctors who are specially trained and experienced in this procedure perform the test. There is a potential for the capsule to be stuck at a narrowed spot in the digestive tract resulting in bowel obstruction. This usually relates to a stricture (narrowing) of the digestive tract from inflammation, prior surgery or tumor. It is important to recognize obstruction early. Signs of obstruction include unusual bloating, abdominal pain, nausea or vomiting. You should call your doctor immediately for any such concerns. Also, if you develop a fever after the test, have trouble swallowing or experience chest pain, tell your doctor immediately. Be careful not to prematurely disconnect the system as this may result in loss of pictures being sent to your recording device.