Colonoscopy

Colonoscopy

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Endomucosal resection of polyp

Diagram showing a colonoscopy

Colonoscopy is a medical procedure that allows a physician to visually examine the colon and rectum using a device known as a colonoscope. This procedure is primarily used to diagnose and treat certain diseases of the gastrointestinal tract, including colorectal cancer and inflammatory bowel disease.

Procedure

A colonoscopy is performed using a colonoscope, a long, flexible tube that is approximately 1.5 meters in length. The colonoscope is inserted into the anus and advanced through the colon. The device is equipped with a light and a camera that allows the physician to view the interior of the colon on a monitor.

Before the procedure, the patient is typically given a laxative to clean out the colon. This is known as a bowel prep. The patient may also be given a sedative to help them relax during the procedure.

During the colonoscopy, the physician may take biopsies or remove polyps. These samples are then sent to a laboratory for further analysis.

Indications

Colonoscopy is often recommended for individuals who are at an increased risk of developing colorectal cancer. This includes individuals over the age of 50, those with a family history of colorectal cancer, and those with certain genetic syndromes.

In addition to screening for colorectal cancer, colonoscopy can also be used to diagnose and manage other conditions, such as inflammatory bowel disease, diverticulosis, and bleeding in the gastrointestinal tract.

Risks and Complications

While colonoscopy is generally considered safe, it does carry some risks. These include perforation of the colon, bleeding, and reactions to the sedatives used during the procedure. In rare cases, colonoscopy can also lead to serious complications, such as cardiopulmonary arrest.

See Also

• Endoscopy
• Gastroenterology
• Colorectal cancer screening