An endoscope is a medical device consisting of a camera mounted on a flexible tube. Small instruments can be used to take samples of suspicious tissues through the endoscope.

In gastrointestinal endoscopy, this device is inserted through the mouth or anus. For other areas, small incisions are made.

There are many types of endoscope, and they are named in relation to the organs or areas they explore. Endoscopes used to look directly at the ovaries, appendix, or other abdominal organs, for example, are called laparoscopes (laparoscopy).

Other endoscopes are inserted through incisions to look at joints (arthroscopy) or the lungs (bronchoscopy), and still others are used to view the inside of the bladder (cystoscopy).

Please see the following tests or procedures for more information on how the test will feel, the risks, why the test is performed, and normal and abnormal results:

• Anoscopy
• Arthroscopy
• Bronchoscopy
• Chorionic villus sampling
• Colonoscopy
• Cystoscopy
• EGD (esophagogastroduodenoscopy)
• ERCP
• Fetal blood testing
• Laparoscopy
• Sigmoidoscopy
• Small bowel biopsy

Before some types of endoscopy, such as an examination of the upper of the gastrointestinal tract, the you may be asked not to eat or drink before the exam. Before an examination of the lower gastrointestinal tract, the patient may also be asked to clear the colon of stool with enemas or laxatives.

Ask your health care provider about any special preparation before your endoscopy.

During an endoscopy, the patient is sedated. With appropriate sedation, the patient should experience little if any discomfort.

An endoscopy may be performed for a variety of signs and symptoms, including bleeding, pain, difficulty swallowing, and a change in bowel habits. Exams of the colon may also be performed to screen for colon polyps and colon cancer.